• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention provides a module for operating at least one luminous means, preferably at least one LED, with at least one electrically insulating barrier which separates a primary side, which can be supplied from a mains voltage, from a secondary side of the module, from which preferably the at least one luminous means can be supplied , wherein a secondary side passive circuit is provided, which is connected in a supply path via a potential separating transducer across the barrier with a primary side control circuit, and wherein the primary side control circuit is adapted to the secondary side passive circuit (via the converter) a test signal given temporal development and at the same time to monitor a secondarily generated, returned in the supply path measurement signal, in particular a current increase in the converter to monitor.
    公开号:AT15725U1
    申请号:TGM9013/2014U
    申请日:2014-04-25
    公开日:2018-04-15
    发明作者:Dünser Mathias；Vonach Christoph；Mohr Martin
    申请人:Tridonic Gmbh & Co Kg；
    IPC主号:
    专利说明:

    description
    MODULE WITH MEASURED SIGNAL FEEDBACK VIA POTENTIAL-DISCONNECTING CONVERTER The present invention relates to a module for operating at least one lamp / lamp section, preferably at least one LED.
    In particular, the invention relates to an LED module or an LED converter which has an electrically insulating barrier, e.g. a so-called SELV barrier (safety extra low voltage barrier), i.e. a safety extra-low voltage barrier that e.g. Circuit areas with safety extra-low voltage isolated from other circuit parts.
    The invention relates in particular to a module whose output power / output current / output voltage (hereinafter only the term output voltage is used) can be set in that a selection of the output voltage is made via a selection input of the module. For example, at least one selection resistor can be connected to the selection input and the output voltage can then be set as a function of a resistance value of the connected selection resistor.
    A control circuit of the module therefore detects a measurement signal that represents the resistance value of the connected resistor. This concept is referred to below as “Iselect. In particular, a voltage or current measurement signal with regard to the voltage / current can be tapped from the lighting means (Iselect) on the selection resistor.
    The invention further relates to modules which have a temperature measuring unit (e.g. NTC, negative temperature coefficient resistor, PTC, positive temperature coefficient resister, or thermistor).
    As an alternative or in addition, the control circuit can therefore detect at least one further measurement signal which reproduces a temperature determined by the temperature measurement unit. This can e.g. be a temperature coefficient, which is determined in particular by means of a variable electrical resistance, the value of which varies reproducibly due to a change in temperature. In this case, the measurement signal again indicates a resistance value. The measurement signals are generally voltages / currents that either represent resistance values or on the basis of which the resistance values can be determined.
    The temperature is determined, for example, in order to change the output voltage of the module depending on the determined temperature, for example in order to switch off the module at too high / too low temperatures. This concept is hereinafter referred to as “ITM (intelligent temperature management).
    The above-mentioned electrically insulating barrier divides the module into a primary side and a secondary side with respect to the barrier, which e.g. is also referred to as the SELV side. The primary side can often be supplied directly or indirectly from a mains supply (AC / DC voltage / current), while the connectable illuminant can be supplied directly or indirectly from the secondary side.
    The invention aims at modules in which the acquisition and evaluation of the measurement signals is carried out by a primary-side control circuit. This means that preferably no control circuit for detection and evaluation is provided on the secondary side, in particular no IC, ASIC or microcontroller.
    Even in relatively simple applications, it is often desirable here to carry information or measurement signals from the secondary side of the barrier to the primary-side control unit.
    For example, it is desirable to include temperature information, e.g. read out via a secondary-side temperature measuring resistor (NTC, PTC) to lead to the primary side. In this case, it is desirable to tap the temperature information on the secondary side, since the temperature measuring unit can be arranged so close to the illuminant.
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    AT15 725U1 2018-04-15 Austrian
    [0012] Furthermore, the selection resistor, which can be connected, for example, to the selection input of the module for setting the output voltage, is a component which can be used and exchanged by a human user, in particular by means of resistors of different dimensions.
    The human user can come into contact with conductive parts of the module, which is why the secondary side of the module can preferably be operated with the safety extra-low voltage (low-voltage power supply, SELV or LVPS, low voltage power source). It is therefore often desirable to tap a voltage or current measurement signal with regard to the voltage / current through the illuminant at the selection resistor and to trace it back to the primary side. On the other hand, the primary-side control circuit can then be supplied with a higher voltage on the primary side.
    In the prior art it is necessary, in a relatively complex manner, to provide an A / D converter which is fed by a low-voltage supply provided on the secondary side and which then returns the signals mentioned, for example by means of an optocoupler, to the control unit on the primary side of the electrically insulating barrier ,
    The invention would now like to reduce the circuitry and accordingly the costs, and in particular to bring the A / D converter, the optocoupler and the low-voltage supply to an end.
    [0016] The invention therefore provides an apparatus and a method according to the independent claims. Further developments of the invention are the subject of the dependent claims.
    In one aspect, the invention provides a module for the operation of at least one light source, preferably at least one LED, with at least one electrically insulating barrier that separates a primary side that can be supplied from a mains voltage from a secondary side of the module, from which preferably the at least one lamp can be supplied, a secondary-side passive circuit being provided, which is connected in a supply path via a potential-isolating converter across the barrier to a primary-side control circuit, and wherein the primary-side control circuit is designed to connect to the secondary-side passive circuit (via the converter) to apply a test signal with a predetermined development over time and at the same time to monitor a measurement signal generated thereby on the secondary side and returned in the supply path, in particular a current rise in the converter.
    The passive circuit may have at least two resistors on the secondary side, which are connected to a switching element which is designed such that when the test signal is applied on the primary side it first switches the supply path via a resistor / both resistors and the supply path is spaced apart in time both resistors / one resistor switches.
    The passive circuit can have at least two resistors on the secondary side, which are connected to at least two switching elements.
    The switching elements can be designed such that when the test signal is applied on the primary side, the supply path is first switched via the first resistor and, at intervals, the supply path is additionally or alternatively switched via the second resistor.
    The switching elements can be designed such that when the test signal is applied on the primary side, the secondary-side resistors are switched on / off in a binary permuted manner, the permutation being able to have repetitions.
    The primary-side control circuit can detect the measurement signals on the converter at a time interval, which reproduces a resistance value of the resistor (s) currently connected in the supply path in the secondary-side passive circuit.
    No voltage / power supply can preferably be provided on the secondary side
    9.2
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    Be a patent office.
    [0024] The measurement signals can be recorded repeatedly and in particular cyclically.
    The control circuit can carry out an extrapolation on the basis of at least two recorded measurement signals.
    [0026] The extrapolation can be carried out back in time.
    The extrapolation can determine a resistance value of the passive circuit at the time the test signal is applied.
    In another aspect, the invention provides a ballast with a module as described above.
    In another aspect, the invention provides a lamp with a module and / or a ballast, as described above.
    In yet another aspect, the invention provides a method for passively returning a measurement signal from the secondary side of an electrically insulating barrier to a control circuit arranged on the primary side, which in a supply path with a secondary-side passive circuit via a potential-isolating converter across the barrier is connected, the primary-side control circuit applying a test signal with a predetermined temporal development to the secondary-side passive circuit and at the same time monitoring a measurement signal, thereby generated on the secondary side, which is fed back via the supply path, in particular a current rise in the converter.
    The invention will now be described with reference to the figures. It shows:
    1 [0033] FIG. 2 [0034] FIG. 3 [0035] FIG. 5 exemplarily a circuit arrangement according to the invention.
    the course of a measurement signal as an example.
    schematically an extrapolation carried out by the control circuit.
    as an example, a first variant of a circuit arrangement according to the invention with a plurality of resistors on the secondary side.
    as an example, a second variant of a circuit arrangement according to the invention with a plurality of resistors on the secondary side.
    The invention relates to the bridging of the electrically insulating barrier (SELV barrier) of the module. Information should be returned from the secondary side of the barrier to the primary side with little circuitry outlay. According to this invention, the information-transmitting member is a potential-isolating converter, in particular a transformer, the secondary winding of which is connected to a passive measuring circuit, preferably a resistor.
    If a test signal (current or voltage jump) is applied to the primary winding from a control unit on the primary side of the barrier, electrical characteristics of the secondary-side measuring circuit connected to the secondary winding can be inferred by evaluating the temporal development of the current profile on the primary side.
    In the event that a resistor is connected on the secondary side, so to speak this resistor dampens the converter and the absolute value of the on the primary side at e.g. a voltage jump of increasing current depends on the resistance value on the secondary side.
    In the simplest case, an absolute (one-time) detection of a measurement signal, in particular a current, can be used to infer the resistance value of the secondary side after applying a voltage jump on the primary side after a predetermined period of time after the jump has been applied.
    In general, therefore, a test signal is applied on the primary side and also a measurement signal
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    AT15 725U1 2018-04-15 Austrian
    Patent office recorded on the primary side of the converter, the course of which is influenced by passive components on the secondary side.
    [0042] This measurement can also be refined in that the current is recorded not once, but several times, according to predetermined time sequences. If the gradient of the current rise on the primary side can thus be determined, for example, tolerances of the inductances of the converter can be compensated for.
    1 shows an example of a circuit arrangement which represents a simple embodiment. Here, a resistor R se i is connected on the secondary side in parallel to a converter TX. If a test signal is applied to the primary winding of the converter, this is stimulated. Immediately after the test signal is applied, current flows through the resistor R se i (offset current) and the current through the converter begins to increase. On the primary side, a measurement signal, which in particular represents the current through the resistor, is recorded at a measurement resistor (shunt) Rshum.
    [0044] The measurement signal can be determined in two ways.
    First of all, a converter with high inductance can be used. Immediately after the test signal is applied, the measurement signal then reproduces the current through the resistor R se i, since the current in the converter rises very slowly.
    This is shown by way of example in the diagram in FIG. 2.
    Alternatively, the measurement signal can be recorded at a defined / predetermined time. Since the inductance is known, the (offset) signal and the current through the resistor can be determined.
    It is disadvantageous, however, that the measurement signal acquired depends on the inductance of the converter. Therefore, at least two measurement signal acquisitions are preferably carried out and an extrapolation is carried out, which allows a statement about the measurement signal after application of the test signal. This is illustrated in FIG. 3, the dashed lines exemplifying the measurement times t1, t2, while the solid line indicates the extrapolation. The arrow indicates a possible result r1 of the extrapolation, which is carried out in time. In particular, it is not important to determine the resistance value exactly, but to detect changes in the resistance in the ratio, that is, relatively.
    The circuit arrangement shown in FIG. 1 has so far only allowed the detection of a measurement signal which represents the resistance value or the change over time of a resistor. However, if more measurement signals are to be fed back, another solution must be found. Since the converter is generally the most expensive part of the module, a solution with multiple converters would be conceivable, but not advantageous.
    As shown in Figs. 4 and 5, the information about the transformer can be read out in a time-division multiplex.
    This is shown in Figs. 4 and 5 in that two different resistances Rsel and R, tm are to be read out. For this purpose, these resistors, which encode the information, are each connected in series with a transistor (FET, MOSFET) Q1, Q2. The temporal resolution of the reading of the information is triggered by different temporal charging of differently dimensioned capacitances C NE ti or C NE t.
    In the example of FIG. 4, the transistor Q2 is first turned on and thus the value of the resistor R S el is read out via the transformer in a first time period.
    The capacitor C NE t charges slowly. If this is sufficiently charged, it will turn off transistor Q2 via transistor Q1 and thus stop reading the resistor R se i.
    At the same time, the resistance Ritm is now read out by switching on the transistor Q1.
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    AT15 725U1 2018-04-15 Austrian
    Patent Office The difference between the circuit arrangement from FIG. 4 and the circuit arrangement from FIG. 5 is, above all, that in the former the time equalization takes place by switching two n-channel FETs, while in the latter an n-channel and an p-channel FET are used.
    This can of course be extended to even more complex secondary-side passive networks, which can also have more than two resistance combinations. For example, a switching element can be provided for each resistor and the resistors can be binary permuted, so that only one resistor or a specific resistor combination is activated on the secondary side.
    In the present case, the different resistances R ™ and R S el relate to different physical information, so that the primary-side measuring circuit obtains different information in different time periods. However, these resistors could also represent a higher-quality coding in the manner of several bits, which resolve the same information in finer gradations. For example, both resistors could represent the selection resistor R S el.
    Preferably, the passive circuit on the secondary side is a passive network in the sense that no separate low-voltage supply is provided, but only a connection via the barrier by means of the converter.
    A direct voltage V DC can be applied selectively (suddenly) to the primary side of the transformer. The temporal evolution of the current waveform measured across the sense resistor R S hunt · Important is above all the specification of the primary side with respect to the application of the voltage jump and the measurement resistor R shu nt · [0060] The first time section in which the first information is read, relates to a first defined group of applied voltage jumps, while the second section then relates to the application of subsequent voltage jumps. So there are not two different time periods after applying a single voltage jump. The voltage jumps can be achieved by selectively switching on or applying the DC voltage V D c. This selective and repeated connection can take place for example with a predetermined and changeable frequency or pulse width.
    Rather, there is a kind of continuous excitation or continuous incremental charging of the capacitors that switch the transistors over several voltage jumps.
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    AT15 725U1 2018-04-15 Austrian patent office
    权利要求:
    Claims (10)
    [1]
    Expectations
    1. Module for the operation of at least one lamp, preferably at least one LED, with at least one electrically insulating barrier that separates a primary side that can be supplied from a mains voltage and a secondary side of the module, from which preferably the at least one lamp can be supplied, one of which is secondary passive circuit is provided, which is connected in a supply path via a potential-isolating converter (TX1) across the barrier to a primary-side control circuit, and wherein the primary-side control circuit is designed to apply a test signal to the secondary-side passive circuit with a predefined temporal development and at the same time to monitor a measurement signal generated thereby on the secondary side and returned in the supply path, in particular a current rise in the converter (TX1).
    [2]
    2. Module according to claim 1, wherein the passive circuit on the secondary side has at least two resistors which are connected to a switching element (Q1 / Q2) which is designed such that when the test signal is applied to the primary side, it firstly connects the supply path via a resistor (R se i) / switches both resistors (R se i, Ritm) and switches the supply path via both resistors (R se i, R ™) / one resistor (R se i) at intervals.
    [3]
    3. Module according to claim 1 or 2, wherein the passive circuit on the secondary side has at least two resistors (R se i, Ritm) which are connected to at least two switching elements (Q1, Q2).
    [4]
    4. Module according to one of claims 2 or 3, wherein the switching elements (Q1, Q2) are designed such that when the test signal is applied on the primary side, first the supply path via the first resistor (R se i) and the supply path at intervals or alternatively is switched via the second resistor (R, ™).
    [5]
    5. Module according to one of claims 2 or 3, wherein the switching elements (Q1, Q2) are designed such that when the test signal is applied on the primary side, the secondary-side resistors (R se i, Ritm) are switched on in a binary permuted manner, the permutation repeats can have.
    [6]
    6. Module according to one of the preceding claims, wherein the primary-side control circuit detects the measurement signals at the converter (TX1) at a time interval, which a resistance value of the / the currently connected in the supply path in the secondary-side passive circuit resistance (R se i) / resistors ( R se i, Ritm) reproduces.
    [7]
    7. Module according to one of the preceding claims, wherein no voltage / power supply is provided on the secondary side.
    [8]
    8. Module according to one of the preceding claims, wherein the detection of the measurement signals is repeated and in particular cyclically.
    [9]
    9. Module according to one of the preceding claims, wherein the control circuit carries out an extrapolation on the basis of at least two detected measurement signals.
    [10]
    10. Module according to one of the preceding claims, wherein the extrapolation is carried out in time.
    With 3 sheets of drawings
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    Fig. 2
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    Fig. 3
    Fig. 4
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    Fig, p
    9.9
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    引用文献:
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    法律状态:
    2019-12-15| MM01| Lapse because of not paying annual fees|Effective date: 20190430 |
    优先权:
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