• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
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    • 专利摘要:
    abstract method of calculating energy loss in an inductive energy transfer system, method of allowing the calculation of energy loss in an inductive energy transfer system, energy receiver, energy transmitter and energy transfer system the invention proposes a method of calculating energy loss in an inductive energy transfer system comprising an energy transmitter (112) to inductively transmit energy to an energy receiver (110) through a transmitting coil (114) and a receiving coil ( 104), the method comprising a step of obtaining, through the energy transmitter, time information for time alignment to allow the energy transmitter to align the energy loss calculation time with the energy receiver, and a step calculation of energy loss during energy transfer according to the time information obtained and energy parameter received communicated from the power receiver. 1/1
    公开号:BR112013023947B1
    申请号:R112013023947
    申请日:2012-03-12
    公开日:2020-05-05
    发明作者:Van Wageningen Andries
    申请人:Koninklijke Philips Nv；
    IPC主号:
    专利说明:

    METHOD OF CALCULATING ENERGY LOSS IN AN INDUCTIVE ENERGY TRANSFER SYSTEM, ENERGY RECEIVER, ENERGY TRANSMITTER AND INDUCTIVE ENERGY TRANSFER SYSTEM FOR CALCULATING ENERGY LOSS
    FIELD OF THE INVENTION
    The invention relates to a method of calculating energy loss in an inductive energy transfer system in an energy transmitter.
    The invention also relates to a method of allowing the calculation of energy loss in an inductive energy transfer system in an energy receiver.
    The invention further relates to an energy transmitter, an energy receiver and a communication signal.
    The invention relates to the field of energy transmission technology, particularly the method and device for calculating energy loss during energy transfer.
    The transfer of energy through magnetic induction is a well known method, applied mainly in transformers, having a tight coupling between the primary and secondary coils. By separating the primary and secondary coil in two devices, the wireless energy transfer between these devices is made possible based on the principle of a loosely coupled transformer. The basic elements for such a system are an energy transmitter containing a primary coil and an energy receiver containing a secondary coil.
    HISTORY OF THE INVENTION
    The document System description, Wireless Power Transfer, Volume I: Low Power, Part 1: Interface Definition, Version 1.0, July 2010, published by the Wireless Power
    Petition 870190111278, of 10/31/2019, p. 5/13
    2/22
    Consortium available at http: // www. wirelesspowerconsortium.com/ downloads / wirelesspower-specification-part-1.html, also called wireless Qi power specification describes wireless power transmission.
    To prepare and control the transfer of energy between a power transmitter and a power receiver in such a wireless inductive power transfer system, the power receiver communicates information to the power transmitter. For example, the energy receiver can communicate a data packet indicating the energy received, for example, the rectified energy.
    One problem is that metal objects positioned on the surface of the energy transmitter can reach an unwanted high temperature (above 65 ° C) due to eddy currents caused by the magnetic field generated by the energy transmitter. This is an unwanted situation. Burns to the skin and melting of plastics could result from this heating.
    SUMMARY OF THE INVENTION
    It is an objective of this invention to provide a method and devices for transmitting energy that allow the transmitter to avoid heating metal objects.
    For this purpose, according to a first aspect of the invention, a method of calculating energy loss in an inductive energy transfer system comprising an energy transmitter for transmitting energy inductively to an energy receiver through a transmitting coil and a receiving coil, comprises steps of, through the energy transmitter:
    - obtaining a received energy parameter communicated from the energy receiver;
    - obtaining time information for alignment
    3/22 in time communicated from the energy receiver to allow the energy transmitter to align, with the energy receiver, the calculation time of an energy loss during energy transfer;
    - calculation of energy loss according to the time information obtained and the energy parameter received.
    For this purpose, according to another aspect of the invention, a method of triggering the calculation of energy loss in an inductive energy transfer system comprising an energy transmitter to inductively transmit energy to an energy receiver through a transmitting coil and a receiving coil, comprises steps of, through the energy receiver:
    - communication to the energy transmitter, time information for time alignment to allow the energy transmitter to align with the energy receiver, the calculation time of an energy loss during energy transfer;
    - determination of a received energy parameter according to the time and
    - Communication to transmitter in energy, The respect of parameter of energy received. At measures have the effect that the loss power is precisely determined due the energy received and The
    transmitted energy to be determined according to the same time information, for example, in the same aligned time window. The loss of energy in a metal object can be estimated by taking the difference between the net energy transmitted and the gross energy received. To prevent too much energy from being dissipated into a metal object, the energy transmitter terminates the energy transfer if the energy loss exceeds a limit. Advantageously, metal objects are prevented from heating through the
    4/22 determination of energy loss which is not part of the system's normal energy loss.
    For this purpose, according to another aspect of the invention, an energy receiver comprises a communication unit for communicating with an energy transmitter to inductively transmit energy to the energy receiver through a transmitting coil and a receiving coil, the receiver of energy being arranged to determine a received energy parameter according to the time information and the communication unit arranged to communicate with the received energy parameter and to communicate time information for time alignment to allow the transmitter to line up with the power receiver, the calculation time of energy loss during energy transfer.
    For this purpose, according to another aspect of the invention, an energy transmitter comprises a communication unit for communicating with an energy receiver arranged to receive energy inductively from the energy transmitter through a transmitting coil and a receiving coil, the communication unit being arranged to communicate a received energy parameter and time information for time alignment, the energy transmitter being arranged to calculate energy loss during energy transfer from the energy transmitter to the energy receiver accordingly with the received energy parameter reported from the energy receiver during energy transfer and applying the reported time information from the energy receiver to calculate the energy loss between the energy transmitter and the energy receiver.
    For this purpose, according to another aspect of the invention, a communication signal to communicate to a
    5/22 energy transmitter from an energy receiver arranged to receive energy inductively from the energy transmitter through a transmitting coil and a receiving coil, is arranged to communicate a received energy parameter and time information for alignment of time, to allow the energy transmitter to align with the energy receiver, the time from calculating an energy loss during energy transfer to calculating the energy loss between the energy transmitter and the energy receiver.
    Advantageously, the devices and signal constitute a system for wireless energy transmission, the system of which is activated to calculate the energy loss during the transfer of energy from the energy transmitter to the energy receiver according to the received energy parameter and the time information for calculating the energy loss between the energy transmitter and the energy receiver.
    Optionally, in methods, devices and / or signal, the time information comprises the size of a time window and an offset of the time window in a time reference point.
    Optionally, a method of calculating energy loss in an inductive energy transfer system comprising an energy transmitter to inductively transmit energy to an energy receiver through a transmitting coil and a receiving coil, the method comprises steps of:
    - obtaining, through the energy transmitter, the time information for time alignment to allow the energy transmitter to align the energy loss calculation time with the energy receiver;
    - calculation of energy loss during
    6/22 energy transfer according to the time information obtained and the received energy parameter communicated from the energy receiver.
    Optionally, timing information comprises the size of a time window and its displacement to a time reference point.
    Optionally, the time reference point is related to the communication of a packet from the energy receiver to the energy transmitter.
    Optionally, the time reference corresponds to the end of the communication of a given bit of the packet.
    Optionally, the package to which the time reference refers contains the received energy information that the energy transmitter applies to calculate the energy loss.
    Optionally, the package to which the time reference refers precedes the package containing the received energy information that the energy transmitter applies to calculate the energy loss.
    Optionally, the size of said time window is reduced to zero or relatively small value, where the energy receiver takes a single measurement to determine the energy received and the energy transmitter calculates the energy loss in line with this measurement.
    Optionally, the energy receiver comprises a unit for communicating parameters related to the time alignment parameters before energy transfer to allow the energy transmitter to align with the energy receiver the calculation time of energy loss during energy transfer .
    Optionally, an energy receiver further comprises a unit for communicating its received energy to the energy transmitter through:
    7/22
    - a single data entity, or
    - through two data entities, in which the first data entity containing the output value and the second entity containing information on the loss of energy in the receiver, or mobile device from which the energy transmitter can calculate the received energy.
    Optionally, an energy transmitter comprises the unit for calculating energy loss during energy transfer from the energy transmitter to the energy receiver according to the energy received communicated from the energy receiver during the energy transfer and for applying the information of time communicated from the energy receiver before the energy transfer for time alignment for calculating the energy loss between the energy transmitter and the energy receiver.
    Optionally, an energy transmitter can also comprise:
    - a unit for applying multiple cases of received energy information communicated by the energy receiver to increase the robustness of the energy loss calculation method;
    - a unit to complete the transfer of energy if for two or more current cases the energy loss exceeds a limit;
    - a unit to average two or more subsequent cases to calculate an average energy loss over these cases.
    The invention also comprises an energy transfer system containing an energy transmitter as described above, and an energy receiver as described above.
    Other preferred embodiments of the device and method according to the invention are given in the claims
    8/22 attached, disclosure of which is incorporated herein by reference.
    BRIEF DESCRIPTION OF THE DRAWINGS
    These and other aspects of the invention will be apparent and further elucidated with reference to the realizations described by way of example in the description below and with reference to the accompanying drawings, in which
    Figure 1 shows an example of the change in energy received and energy transmitted as a result of a charging step;
    Figure 2 illustrates the definition of the time window according to the realization; and
    Figure 3 represents an embodiment of how to determine the time reference. The figures are purely diagrammatic and not drawn to scale. In the Figures, the elements that correspond to elements already described have the same reference numerals.
    Figure 4 shows a method of calculating energy loss, and a method of allowing the calculation of energy loss in an inductive energy transfer system.
    Figure 5 shows a transmitter and a receiver in an inductive power system.
    DETAILED DESCRIPTION OF ACHIEVEMENTS
    One method of preventing a metal object from heating up is to determine the loss of energy that is not part of the system's normal energy loss. The loss of energy in a metal object can be estimated by taking the difference between the net energy transmitted and the gross energy received. To prevent too much energy from being dissipated into a metal object, the energy transmitter terminates the energy transfer if the energy loss exceeds a limit.
    To determine the energy loss the receiver
    9/22 energy estimates its received gross energy, for example, by measuring its rectified voltage and current, multiplying current and voltage, and adding an estimate of internal energy losses at the energy receiver. The energy receiver communicates the energy received to the energy transmitter, for example, with a minimum frequency, such as every 5 seconds. Such a minimum frequency means that the distance in time between the ends of two current energy information data is a maximum of 5 seconds.
    The energy transmitter estimates its transmitted net energy, for example, by measuring the input voltage and current, multiplying the input voltage and current, and subtracting from the intermediate result an estimate of the internal energy losses of the energy transmitter. O
    transmitter in energy then calculate the lost in energy subtracting The energy received communicated gives energy transmitted. If the difference exceeds one limit, the transmitter
    of energy assumes that a lot of energy is dissipated in a metal object and ends the transfer of energy.
    A termination criterion is defined by:
    P T - P R > limit with:
    P T = estimated net transmitted energy
    P R = estimated gross energy received
    P T - P R = estimated energy loss
    Limit = safe limit
    The limit can incorporate the inaccuracy of the estimated transmitted energy and the energy received. It is important to achieve high accuracy in estimating the energy transmitted and received and to reduce the error in the calculation of energy loss.
    If the output load fluctuates over time, an error will occur in the calculation of the energy loss if the measurements and
    10/22 estimates of energy transmitted and received are not aligned in time. This error can be reduced by averaging the energy transmitted and energy received over a longer period of time.
    One possible implementation of averaging the energy measurement is to add multiple samples of instantaneous measurements and divide the result by the number of samples over a period of time.
    Another possible implementation is to take the contribution of each new sample in proportion to the average calculated previously. So, for example, if an energy receiver takes 20 samples over a certain period, the new average would be:
    New Sample * 1/20 + Old Average * 19/20.
    Yet another possibility is to apply a low-pass filter to cushion the contribution of the actual measured value. This could, for example, be done with a capacitor that is connected to the measured signal through a resistor.
    Figure 1 shows an example of the change in energy received and energy transmitted as a result of a charging step. The period over which the energy receiver averages its received energy is not known to the energy transmitter and may vary from design to design. This problem is illustrated by Figure 1. The figure shows the change in energy received (energy Rx) and energy transmitted (energy Tx) as a result of a charging step (a sudden increase or decrease in charge).
    In figure 1, the window on which the average energy transmitted is taken (window Tx) is not aligned with the window on which the average received energy is taken (window Rx). For example, if both Tx and Rx energies change from 1W
    11/22 to 5W as a result of a charging step, the average energy received in the Rx window will be 3W and the energy transmitted in the Tx window will be 4W, leading to an (additional) error of 1W in the energy loss estimate.
    As a solution, the energy transmitter and the energy receiver could respectively measure the average energy transmitted and average energy received over the period between the two current energy packets received. This method, however, will fail if a received power packet does not reach the power transmitter due to a communication error.
    The invention reduces the error in the method of detecting energy loss that is caused by a dynamic output load by aligning the estimated energy transmitted to that of the energy received in time. For this purpose, the energy transmitter will obtain the information to align the measurement time of the transmitted energy and the received energy. This information could be, for example, a time window parameter for configuring a time window for the energy transmitter during the configuration phase to allow the energy transmitter to align its transmitted energy estimate with the received energy estimate by applying this time window.
    To allow the energy transmitter to eliminate or decrease the energy loss miscalculation for the energy loss method described above in the event that the output load fluctuates, the energy transmitter needs information in the time period for which the energy loss must be calculated.
    For this purpose, the power receiver communicates the parameters determining the configuration for a time window during system configuration. The power transmitter applies the window configuration to align the
    12/22 estimate of your transmitted energy to that of the received energy.
    There could be a standard time window pre-stored on the power transmitter. In the event that the power receiver does not communicate such time parameters, the power transmitter applies the default values for them.
    The time window is determined by the following two parameters.
    1. Window size - for example, an 8-bit value. The range of this parameter could be, for example, from 0 seconds to 12,750 seconds. A reasonable value for the window size would be 1 second. The default value could also be 1 second. The window size can also be reduced to a relatively small value, for example, 100 ms or 255 ms.
    2. Scrolling the window - for example, an 8-bit value. This value indicates the displacement of the time window for a time reference. Preferably, the offset is defined between the end of the time window and the reference point, but it is also possible to use the start point of the time window to determine the offset for the reference. The range of this displacement parameter could be, for example, from 0 ms to 255 ms. A reasonable value for the window offset would be 100 ms. The default value could also be 100 ms.
    3. The time reference can be set according to a moment when a certain bit of a packet is communicated from the energy receiver to the energy transmitter. The package is preferably the received energy package, which the energy transmitter applies to calculate the energy loss, due to the receipt of this package, the energy transmitter can be sure of having the right relationship between the received energy information and the
    13/22 time window over which you need to calculate the energy loss.
    Exemplary achievements to determine the time reference are as follows:
    The. The reference time is determined by (last) communicating the last bit of the received energy packet. Typically, the length and therefore the time to communicate the received energy packet is known to the energy receiver (for example, 20 ms) and also the time to calculate the received energy from measurements (for example, 80 ms ) is known to the designer of the power receiver - meaning that the window displacement can be determined very precisely (for example, 100 ms).
    B. The reference time is determined by communicating the first bit of the received energy packet. This timing could be a little more accurate considering that the imprecision of the transfer time of the package is now eliminated. The power transmitter, however, must store the receiving time of the first bit of a packet and wait for the remainder of the packet to be received before knowing that the bit is part of a received power packet.
    Figure 2 illustrates the definition of the time window according to realization a, in which the reference time is defined by the end of the communication of the last bit of the received energy packet (Energy Rx). The time between the end of the time window and the reference time is determined by the displacement of the window. The time between the beginning and the end of the window is determined by the size of the window.
    A possible implementation for the energy transmitter is to sample its average energy through small steps of time and store these values in memory. a
    14/22 step value could be, for example, 10 ms. After receiving a received energy package, the energy transmitter consults the stored values and calculates the average value through the configured time window. With a window size of 100 ms and a window offset for the last bit of the received energy packet of 100 ms, the energy transmitter must store, for example, 110 samples. The energy transmitter can store circularly transmitted energy samples, thus overwriting the oldest sample with the most recent one.
    The robustness of the energy loss method can be improved if the energy transmitter does not complete the energy transfer based on the information loaded in a single energy message received.
    The power transmitter could wait for one or more additional energy packets received before completing the power transfer. So, if the energy loss limit was exceeded according to the information on a single energy packet received, the power transmitter could decide to delay the decision to end the transfer of energy to receive a current packet.
    It could terminate the energy transfer if for every two or more current energy packets received, the energy loss exceeds the limit.
    It could average the calculated energy loss corresponding to the last two or more energy packets received and terminate the energy transfer if this average exceeds a limit.
    Received energy can be communicated from the energy receiver to the energy transmitter via a received energy pack as indicated in the descriptions above. The invention, however, is not limited to this way of communicating the received energy.
    15/22
    The energy receiver could also communicate its received energy in other ways, such as • Communicating (any form of) output energy, for example, the output rectified energy and additionally the information that allows the energy transmitter to calculate the received energy of the output energy. The additional information could be communicated as a separate package, but it also included with the output energy information in a single package and could, for example, comprise:
    1. Actual energy loss at the receiver whose energy transmitter must add the output energy to calculate the received energy. This information is preferably communicated within the same package as the output energy, or in a separate package shortly before or after an output energy package.
    2. Energy correction factor whose energy transmitter must multiply with the output energy and the energy displacement factor whose energy transmitter must add the output energy to calculate the received energy. Such correction information should be communicated by the receiver during configuration in order to reduce overall communication during energy transfer.
    The invention applies a window offset with respect to a reference time. The description above makes use of the energy package received to relate such reference time, which is after the time window that is applied to the calculation of energy loss. Other methods for determining such a reference point, however, are also possible. The following are some additional examples for the time reference.
    Figure 3 represents an embodiment of how to determine the time reference. The energy receiver could send the received energy packet over distances of
    16/22 equal time; if the energy transmitter is informed about the time distance between these packages, it is possible to use the energy package received earlier communicated for the time reference. Figure 3 illustrates how to use the previous received energy packet reported for the reference time. The last bit of the previous received energy packet is the reference time. The time window starts when the window moves after this reference time. The advantage is that the energy transmitter does not have to store the samples in order to determine their average energy transmitted in the past. Its average energy transmitted during the time window can be determined. You should only store the resulting average energy through the time window until the next energy packet received. In case the energy transmitter does not receive the next received energy packet due to a communication error, an interval can be applied to discard the last stored average transmitted energy and use the information in the expected time between two current received energy packets for start determining the average energy transmitted for the next time window.
    For this method it is necessary that the energy transmitter is informed on the time distance between two current received energy packages. This could be arranged using a default value and / or communicating that value from the power receiver to the power transmitter, for example, in the system configuration phase. In this method, the energy receiver should not deviate too much time between the communication of two packets to keep the energy transmitter aligned. This could be a problem if other control packets have to be communicated with a higher priority and cause a delay in the communication of the received power pack. Consequently, the energy package
    17/22 received must have a high priority.
    Another possibility is for the power receiver to synchronize with a power transmitter signal. In the event that the system allows communication from the energy transmitter to the energy receiver, for example, by modulating the amplitude, frequency, or phase of the energy signal, the energy transmitter could send a synchronization data at regular intervals of time. Such data could also function as a time reference for a time window. The time window could be, for example, exactly between two current synchronization data.
    The system applies a window through which the energy received and energy transmitted are averaged. One embodiment includes the possibility of reducing the window size to zero. This means that instead of the average values of the energy received and the energy transmitted, the exemplary values are taken to carry out the method of energy loss. A practical way of implementation could be to apply a very small window size in which the energy receiver takes a (single) measure to determine its received energy and in which the energy transmitter takes a (single) measure to determine its transmitted energy. This realization is less robust compared to an realization in which the average of the multiples measured over a larger time window is taken. The robustness can, however, be improved as previously described.
    In a practical embodiment, the Window Shift indicates the interval between the window to average the received energy and the beginning of the transmission of the Received Energy Package. The Window Offset value can be expressed in units via a data value in a data packet to be transferred from the power receiver to the power transmitter, for example, 3 bits. Another value of
    18/22 data can indicate the Window Size, for example, 5 bits. Values can be expressed in units of a few ms, for example, 4 ms. Advantageous 8 ms units are used, which allows a maximum window size of 252 ms instead of 124 ms.
    It is realized that the time window can be a relatively long period, for example, 1 s, but also a relative short period, for example, 64 ms. The shortest period allows you to measure energy only when there is no communication between Rx and Tx. Amplitude modulation due to communication makes measurements less accurate. For example, the shorter period allows you to set the time window to be from the end of the previous packet (for example, the previously received power pack) to the start of the current received power pack, or from the end of the packet previous to the end of the previous package + the window size as defined.
    Figure 4 shows a method of calculating energy loss, and a method of allowing the calculation of energy loss in an inductive energy transfer system. The inductive energy transfer system has an energy transmitter to inductively transmit energy to an energy receiver through a transmitting coil and a receiving beverage. The method of calculating the energy loss starts after the inductive energy system has started the energy transfer, as shown by the INIT TR step (start the transmission). Then the method continues to perform, through the energy transmitter, the following steps. The method obtains, in the OTI stage (obtaining time information), the time information for time alignment communicated from the energy receiver. Time information allows the energy transmitter to align, with the energy receiver, the calculation time of a
    19/22 loss of energy during energy transfer. The method determines the energy data transmitted in the DTPD step (determine the energy data transmitted). The method obtains a received energy parameter communicated from the energy receiver in the OPP step (obtain energy parameter). Then, the method follows, in the CALC (calculate) step, calculating the energy loss according to the time information obtained, the transmitted energy data determined and the received energy parameter.
    The figure also shows the method of making it possible to calculate the energy loss through the steps performed by the energy receiver. The method starts after the inductive energy system has started transferring energy, as shown by step INIT RC (start receiving). The method communicates in the CTI step (communicating time information), through the energy receiver to the energy transmitter, the time information for the time alignment. The time information allows the energy transmitter to align the energy loss calculation time with the energy receiver during the energy transfer. In the DPP step (determine energy parameter), a received energy parameter is determined according to the time information, for example, in a time window as defined by the time information. Then the method goes on to communicate, in the CPP step (communicate energy parameter) to the energy transmitter, the energy parameter received.
    Figure 5 shows a transmitter and a receiver in an inductive power system. A power supply device 110, also called a base station, has at least one power transmitter 112, 112a and a system unit 115 for controlling the inductive power system. A transmitter coil 114, also called a primary coil, is
    20/22 shown connected to a power conversion unit of transmitter 113, which is coupled to a controller 111, also called a control and communications unit. The power conversion unit of transmitter 113 converts incoming energy into transfer energy to be magnetically transferred from the transmitting coil to the receiving coil. The communication unit of the transmitter 111 is coupled to the energy conversion unit to receive the communication signal through the transmitting coil from the receiving coil.
    A power receiver 100, usually a mobile device, has a receiver coil 104, also called a secondary coil, which is shown connected to a power capture unit 103 that provides output power for a load 102. The power capture unit power is coupled to communication from the receiver and control unit 101. communication from the receiver and control unit is arranged to drive the receiving coil to transmit a communication signal through the receiving coil to the transmitting coil, and the load is coupled 102 to detect and control the charge energy status. The inductive energy transfer system as shown in Figure 4 is based on the well-known Qi standard. The control and communication units on the transmitter and receiver are adapted to perform the functions as defined above with reference to Figures 1, 2 and 3.
    In summary, the invention proposes a method of calculating energy loss in an inductive energy transfer system comprising an energy transmitter to inductively transmit energy to an energy receiver through a transmitting coil and a receiving coil, the method comprising a obtaining the time information through the energy transmitter
    21/22 time alignment to allow the energy transmitter to align the energy loss calculation time with the energy receiver, and an energy loss calculation step during energy transfer according to the obtained time information and received energy parameter communicated from the energy receiver.
    It must be realized that the invention can be implemented in hardware and / or software, using programmable components. Methods for implementing the invention have steps corresponding to the functions defined for the system as described above.
    Although the present invention has been described in connection with some embodiments, it is not intended to be limited to the specific form set forth here. Additionally, although an aspect may appear to be described in connection with the particular embodiments, a person skilled in the art would recognize that various aspects of the described embodiments can be combined according to the invention. In the claims, the term comprising does not exclude the presence of other elements or stages.
    In addition, although listed individually, a plurality of means, elements or steps of the method can be implemented, for example, through a single unit or processor. In addition, although individual aspects may be included in different claims, they can possibly be advantageously combined, and inclusion in different claims does not imply that a combination of aspects is not possible and / or advantageous. Also, the inclusion of an aspect in a category of claims does not imply a limitation for this category, but instead indicates that the aspect is equally applicable to other categories of claim as appropriate. In addition, the order of aspects in
    22/22 claims do not imply any specific order in which the aspects are to be worked on and in particular the order of the individual steps in a method claim does not imply that the steps must be performed in that order.
    Preferably, the steps can be carried out in any suitable order. Additionally, singular references do not exclude a plurality. Thus, references such as one, one, first, second, etc. they do not exclude a plurality. The reference signs in the claims are provided merely as an example of clarification, they should not be construed as limiting the scope of the claims in any respect.
    权利要求:
    Claims (8)
    [1]
    1 . METHOD OF CALCULATING LOSS OF ENERGY IN AN INDUCTIVE ENERGY TRANSFER SYSTEM, comprising an energy transmitter (112) to inductively transmit energy to an energy receiver (100) through a transmitting coil (114) and a receiving coil ( 104), the method characterized by comprising:
    - communication of an energy parameter from the energy receiver to the energy transmitter (112);
    - communication of time information for time alignment from the energy receiver to the energy transmitter (112) to allow the energy transmitter to align, with the energy receiver, the calculation time of an energy loss during the energy transfer; and
    - calculation of energy loss according to the time information obtained and the energy parameter received, where the time information comprises the size of a time window and an offset of the time window in relation to a reference point of time, and in which the energy transmitter (112) takes multiple samples of energy transmitted during the time window and calculates an average value of the energy transmitted during the time window.
    [2]
    2. METHOD according to claim 1, characterized in that said time reference point is related to the communication of a packet from the energy receiver to the energy transmitter.
    [3]
    3. METHOD, according to claim 2, characterized by the package to which the time reference point refers to contains the received energy parameter.
    [4]
    4. ENERGY RECEIVER, which comprises a communication unit (101) to communicate with a power transmitter
    Petition 870190111278, of 10/31/2019, p. 6/13
    2/4 energy (112) configured to transmit energy inductively to the energy receiver through a transmitting coil (114), the energy being received through a receiving coil (104), characterized by the energy receiver being arranged to determine a parameter energy according to the time information, where the communication unit is arranged to communicate the energy parameter and to communicate the time information for time alignment to allow the energy transmitter to align with the energy receiver, the time of calculation of the energy loss during the energy transfer, in which the time information comprises the size of a time window and an offset of the time window in relation to a time reference point, and in which the transmitter of energy (112) takes multiple samples of energy transmitted during the time window and calculates an average value of the energy transmitted during the time window.
    [5]
    5. ENERGY RECEIVER, according to claim 4, characterized by the energy parameter being communicated to the energy transmitter through:
    - a single data entity, or
    - two data entities, where the first data entity contains the output energy and the second data entity contains information about the loss of energy at the receiver.
    [6]
    6. ENERGY TRANSMITTER, comprising a communication unit (111) for communicating with an energy receiver (100) arranged to receive energy inductively from the energy transmitter (112), the energy being transmitted through a transmitting coil (114) and received through a receiving coil (104), characterized in that the communication unit is arranged to receive an energy parameter and a time information
    Petition 870190111278, of 10/31/2019, p. 7/13
    3/4 for time alignment, the energy transmitter being arranged to calculate the energy loss during the energy transfer according to the energy parameter and the time information, where the time information comprises a window size of time and a displacement of the time window in relation to a time reference point, and in which the energy transmitter (112) takes multiple samples of energy transmitted during the time window and calculates an average value of the energy transmitted during the time window .
    [7]
    7. ENERGY TRANSMITTER, according to claim 6, characterized in that the energy transfer ends when the energy loss exceeds a limit.
    [8]
    8. INDUCTIVE ENERGY TRANSFER SYSTEM FOR CALCULATING LOSS OF ENERGY, which comprises an energy transmitter (112) to transmit energy inductively through a transmitting coil (114); and an energy receiver (100) for receiving energy through a receiver coil (104), characterized in that the energy receiver is configured to determine an energy parameter according to time information, the energy receiver being configured to communicate the energy parameter and time information for time alignment, to allow the energy transmitter to align with the energy receiver, the calculation time of an energy loss during energy transfer, in which the energy transmitter ( 112) is arranged to calculate energy loss during energy transfer based on the energy parameter and the time information, where the time information comprises a size of a time window and an offset of the time window in relation to to a time reference point, and where the transmitter of
    Petition 870190111278, of 10/31/2019, p. 8/13
    4/4 energy (112) takes multiple samples of energy transmitted during the time window and calculates an average value of the energy transmitted during the time window.
    类似技术:
    公开号 | 公开日 | 专利标题
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    同族专利:
    公开号 | 公开日
    ES2614902T3|2017-06-02|
    RU2584820C2|2016-05-20|
    US20140001879A1|2014-01-02|
    JP2014512158A|2014-05-19|
    CN103430415A|2013-12-04|
    JP5940643B2|2016-06-29|
    US9625501B2|2017-04-18|
    US20170219638A1|2017-08-03|
    JP6134023B2|2017-05-24|
    RU2013146792A|2015-04-27|
    MX2013010657A|2013-10-07|
    CN103430415B|2016-03-16|
    US10545180B2|2020-01-28|
    IN2013CN08134A|2015-08-21|
    EP2689512A1|2014-01-29|
    EP2689512B1|2016-11-30|
    JP2016106516A|2016-06-16|
    BR112013023947A2|2017-04-25|
    WO2012127335A1|2012-09-27|
    PL2689512T3|2017-06-30|
    US20200124648A1|2020-04-23|
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    法律状态:
    2018-12-18| B06F| Objections, documents and/or translations needed after an examination request according art. 34 industrial property law|
    2019-08-13| B06U| Preliminary requirement: requests with searches performed by other patent offices: suspension of the patent application procedure|
    2020-03-03| B09A| Decision: intention to grant|
    2020-05-05| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 12/03/2012, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    EP11159036|2011-03-21|
    PCT/IB2012/050905|WO2012127335A1|2011-03-21|2012-03-12|Calculating power loss for inductive power transmission|
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