• 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 relates to a mechatronic assembly for driving an element comprising a control unit (1) and an actuator (2), the control unit (1) comprising a servo control algorithm and a power bridge, said algorithm driving said power bridge, the power bridge delivering a two-wire electrical signal (6) composed of a power signal and a steering signal, the actuator (2) comprising a brushless electric motor (8) N-phase polyphase, binary detection probes (11) for the rotor position of said motor (8), power switches (25) adapted to supply the N phases of the motor (8) from the two-wire electrical signal (6). ), characterized in that the state of the power switches (25) is controlled directly by a signal from the detection probes (11).
    公开号:FR3022414A1
    申请号:FR1455348
    申请日:2014-06-12
    公开日:2015-12-18
    发明作者:Eric Rondot；Gael Andrieux
    申请人:MMT SA；
    IPC主号:
    专利说明:

    [0001] TECHNICAL FIELD OF THE INVENTION [0001] The present invention relates to the field of polyphase DC brushless direct current electric motors. (brushless or BLDC in English). More particularly, it relates to a control method for these engines, not using a microprocessor and requiring, for the engine, only two power supply son. [0002] The need for mechatronic training systems is more and more pressing in many sectors of activity, with also increasingly severe environments. The automotive sector is not spared and the need to reduce emissions by OEMS leads them to offer a multitude of aggregates related to the combustion engine. In addition, the downsizing of the engines as well as the proliferation of peripheral functions make the spaces available increasingly weak. In fact, the environments in which the peripheral functions must be installed offer very severe thermal and mechanical constraints (temperature, vibrations, available space). [0003] It therefore becomes fundamental to propose increasingly robust systems with respect to these constraints. The brushless DC motor technology (BLDC) meets these constraints but is often penalized by a need for control electronics. Electronics quickly becomes a blocking point to ensure a high-temperature system life. Optimized and innovative solutions must therefore be developed. [0004] In addition, the automotive sector is still more competitive and many mechatronic functions have fallen into the technological field of DC brushed motors. Indeed, for system cost issues, the DC brushed motor (BDC) is often preferred to the brushless direct current motor (BLDC), especially and mainly for driving facilities but also reduced electronic costs because the absence of a microprocessor. This is reinforced by the fact that many electronic control vehicles (ECU in English) are equipped with power bridges (called "H") dedicated to the bidirectional control of single-phase actuators (DC motor or solenoid polarized or not). However, the engineer may regret that for purely economic reasons, it can not implement a technology offering unmatched strengths compared to a DC motor: the BLDC offers robustness, low wear, electromagnetic compatibility, compactness. The fact also to use an existing ECU accelerates the marketing of a product by avoiding the debugging and validation of new control software and regulation. STATE OF THE ART [0007] Many functionalities, whether in the automotive field or otherwise, require systems that allow rotation training; these may be mechanical or electrical. In the context of the present invention, we will only consider electric actuators. The term "actuator" describes in this invention the assembly formed by an electric motor, the possible detection means of the position of the motor rotor, the possible means of transformation of movement, the switching electronics and the connector. [0008] Two major families of actuators can be identified: - Actuators known as "dumb" or non-intelligent actuators. Such an actuator (2) is shown in FIG. 1, 5 the actuator (2) comprises a brush DC motor (20) and a drive output (12) and optionally a mechanical speed transformation system (9). The intelligent part in charge of the speed control, is in a remote electronics (1) called ECU (Electronic Control Unit) by those skilled in the art. - so-called "smart" actuators or intelligent actuators. The actuator comprises a microcontroller in charge of the speed control function. Generally this type of actuator is controlled either by a PWM signal or a LIN or CAN communication bus recognized as standards in the automotive field. [0009] For automobile applications close to the heat engine such as, for example, the main or auxiliary water pumps intended for engine cooling, the "dumb" solution is by far preferred to the "smart" solution for reasons of strong compatibility. temperature of the electronic components, in particular the microcontroller. In a solution "dumb" as shown schematically in FIG. 1, an ECU (1) determines from information obtained in the process, the speed of the actuator (2) and calculates a power (torque and speed) and direction (6) signal applied to a DC motor. with broom (20). The mechanical output (12) is coupled to an external member (not shown) to move as a pump body for example. The action on the motor (20) is transmitted to the mechanical output (12) of the actuator (2) generally directly without transformation, or optionally via a mechanical stage (9) of transformation of speed . Thus, this closed loop enables the mechanical output (12) of the actuator -4- (2) to be servocontrolled in speed. The connections (3) between the ECU (1) and the actuator (2) are few: 2 son for the DC brush motor (20) whose differential signal between these two son can be a positive or negative signal. The DC motor (20) responds to the torque and direction signals (6) provided by the ECU (1) through a so-called bridge bridge H (Fig. 23) consisting of four transistors (15a, 15b, 15c , 15d). Patent US005773941 discloses an invention for driving, uni-directionally, a DC motor without lo three-phase brush using two son, including a reference wire (ground or OV) and a power signal wire . An external power supply delivers the power signal that can be continuous or chopped. The switching electronics is self-powered by a rechargeable power supply that is energized on the power signal. [00012] Whether in industrial or automotive applications, the brushless DC motor is now widespread and preferred for the advantages it offers compared to the DC motor as described in patent US4365187 (column 1, line 20 9). This type of motor is preferred in its single-phase brushless DC motor structure with 1 coil or 2 half-coils. Simple electronics that can be integrated near the motor, see in the housing constituting the motor, manages the self-switching of said engine from the signal provided by one or two Hall probes. DISADVANTAGE OF THE PRIOR ART The increasing electrification of the functions present under the hood of an automobile means that the electric actuators are subjected to various and increasingly harsh stresses, particularly with regard to the resistance to ambient temperatures above 125 ° C. The so-called "smart" systems, including a microcontroller and / or complex electronics necessary for controlling an engine and servocontrolling the speed of the actuator, are limited in terms of ambient temperature. The economically viable component type does not allow to cross the 125 ° C limit and often requires expensive cooling means. Existing systems known as "dumb", for their part are compatible with the desired ambient temperatures in that the actuator does not include any complex and sensitive electronic component lo. Only such an actuator uses a brush DC motor which industrially speaking will be less powerful and compact than a brushless DC motor which also has the enormous advantage of a much longer life than the traditional DC motor with brush. It is recognized by those skilled in the art that DC brush motors are sources of electromagnetic disturbance, which is a sore point in an environment increasingly occupied by electronic systems and other computers. [00016] One of the conventional structures of polyphase brushless DC motors is a three-phase motor connected either in a star or in a triangle, thus leaving three connection points for the power supply of the motor. The self-switching of a brushless DC motor for a drive application requires the use of three probes to know the position of the motor rotor. Designing a "dumb" actuator with a brushless DC motor, in place of the brushed DC motor requires the use of a suitable ECU designed for three-phase motor control, namely a three-phase bridge with six transistors and five points connecting with the rotor probes. The speed control systems controlling the actuator in the 4 quadrants, require bidirectional control of the rotation of the motor, which can not be achieved by the invention described in patent U5005773941 whose entry (marked 22 in this text) accepts only one polarity. [00017] The other applications of the mainly single-phase brushless DC motors as described in US Pat. No. 4,365,187 are mainly used for fans or pumps requiring only one direction of rotation and not justifying a need for rotation. braking. As described in column 5 line 3 of the aforementioned patent, the structure of the engine by its geometry or the positioning of the probes, must be designed to ensure the good start of the engine in the preferred direction of rotation. As a result, the brushless DC single-phase motor and its control electronics are not suitable for training applications in the 4-quadrant mode, subject of the present invention.
    [0002] SOLUTION SUPPLIED BY THE INVENTION [00018] The present invention relates to a control system powered by a power source and an actuator working in training. The control system will control the actuator using a speed servo algorithm. The object of the invention is to propose an actuator driven by a brushless DC DC motor while retaining the existing elements identical to the system based on a brush DC motor. The actuator is connected to the control system via a connector, 2 points, combining the signals combining the direction and the torque to be produced by the BLDC motor. A rudimentary electronic circuit resistant to 30 high temperature (> 125 ° C), manages the self-switching N phases of the engine using N probes indicating the position of the motor rotor. The objective of the solution described below is to propose a technological compromise enabling the aforementioned problems to be addressed, proposing a cost-effective solution that does not require a microprocessor, enabling the use of a brushless direct current motor. instead of a DC motor with brush, while keeping the possibility of using a reversible polyphase motor and drive it in both directions of rotation. The invention is therefore intended for any polyphase motor N phases. The present invention provides an economical solution to the substitution of a brushless dc DC motor by a brushless DC DC motor, by satisfying the following criteria: 1- retains an existing remote control (ECU) , without any modification whatsoever hardware or software. 15 2- Immediate interchangeability with already existing products. 3- Increases the life of the actuator. 4- Allows bidirectional control of the motor. 5- Very few electronic components (simple and robust) embedded in the actuator. 6- Components used offering compatibility and resistance at ambient temperatures> 125 ° C. 7- Brushless DC motor and limited number of components allow integration with high compactness. 8- Gain on the weight of the actuator. 9- Reduction of electromagnetic disturbances. More particularly, the invention relates to a mechatronic assembly for driving a member comprising a control unit and an actuator, the control unit comprising a servo control algorithm and a power bridge, said algorithm driving said power bridge, the power bridge delivering a two-wire electrical signal, the actuator comprising an N-8-phase brushless electric motor, binary detection probes of the rotor position of said motor, suitable power switches supplying the N phases of the motor from the two-wire electrical signal, characterized in that the state of the power switches is controlled directly by a signal from the detection probes. By "directly" it is understood that the signal controlling the state of the power switches is issued either from the output of a detection probe, or from the logical combination of several detection probes. the combination of one or more detection probes and a direction signal (direction of rotation of the motor, as written below). No other treatment than very simple logic operations is applied between the signal from the detection probes and the state control of the power switches. These simple operations can be carried out with logic gates or discrete components such as transistors, diodes, resistors, etc. In a preferred embodiment, the direction of rotation of the motor is imposed by an elementary combinatorial logic constructed from the polarity of the two-wire electrical signal and the signal of the detection probes. In a preferred embodiment, the binary detection sensors of the position of the rotor are powered by the two-wire electrical signal. In a particular embodiment, the two-wire electrical signal is a continuous signal whose amplitude is controlled by the servocontrol algorithm. In another embodiment, the two-wire signal is a chopped signal whose duty cycle is controlled by the servocontrol algorithm. In a preferred embodiment, the two-wire signal is rectified by a diode bridge in order to deliver a positive current to the N phases of the motor. [00028] It should be noted that the invention is particularly intended for the automotive field, even if the use is exclusive. Indeed, the applications of drive pumps (oil, air, fuel) are covered by the invention, as well as the drive systems, as described for example in the patent WO2003095803 allowing the phase shift of the shaft to cams or the variable lift of the valves as described for example in the application U57225773. BRIEF DESCRIPTION OF THE FIGURES [00029] Other features and advantages of the invention will become fully apparent from the description which is given hereinafter, by way of indication and in no way limitative, with reference to the appended drawings in which: FIG. . 1 describes a mechatronic assembly of the prior art, FIG. 2 describes a mechatronic assembly according to the invention; FIG. 3 describes an example of the various multiphase coils of the motors to which the invention relates, FIG. 4 depicts the detail of the rudimentary electronic circuit in the context of a bidirectionally controlled actuator; FIG. 5 describes the detail of the rudimentary electronic circuit in the context of a unidirectionally controlled actuator; FIG. 6 describes the power supply of the switching logic according to a preferred embodiment; FIG. 7 describes the shape of the pairs, currents according to a first mode of operation, called "unipolar 1200", - FIG. 8 describes the behavior of couples, currents according to a second mode of operation, called "unipolar 180 °", - FIG. 9 describes the behavior of couples, currents according to a third mode of operation, called "bipolar bipolar mid-point", - FIG. 10 describes the calibration of the probes in the context of the two modes of FIGS. 7 and FIG. 8, - FIG. 11 discloses the electronic circuit of the switching logic according to the first "unipolar 120" mode and its truth table; FIG. 12 discloses the electronic circuit of the switching logic according to the second "unipolar 180" mode as well as its truth table; FIG. 13 discloses the electronic circuit of the switching logic according to the third mode "biphasic bipolar midpoint" and its truth table, - FIG. 14 describes a part of the electronic circuit of the switching logic (applicable to the diagram of Fig. 11 and Fig. 12 and Fig. 13) according to a particular embodiment allowing bidirectional control of the motor as well as its truth table. Fig. 15 describes a part of the electronic circuit of the switching logic (applicable to the diagram of Fig. 11 and Fig. 12 and Fig. 13) according to a particular embodiment allowing bidirectional control of the motor as well as its truth table. and as an alternative to the solution proposed in FIG. 14, 30 - FIG. 16 discloses a portion of the electronic circuitry of the switching logic according to a particular embodiment allowing bidirectional and bipolar control of the motor, as well as its truth table. FIG. 17 discloses a portion of the electronic circuitry of the switching logic according to a particular embodiment allowing bidirectional and bipolar (magnetically) control of the motor, as well as its truth table. FIG. 18 discloses a circuit for extracting the direction information contained in the control signal, - FIG. 19 describes a circuit for extracting the direction information contained in the control signal, and as an alternative proposed in FIG. 18. - FIG. 20 describes the signals from Figs. 18 and FIG. 19, - FIG. 21 describes a circuit for extracting the direction information contained in the control signal, and as an alternative proposed in FIG. 18. - FIG. 22 depicts the signals from FIG. 21, - FIG. 23 describes the typical configuration of the power bridge of a control unit.
    [0003] DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS [00030] FIG. 1 describes, according to the state of the art, a mechatronic assembly for the drive commonly used in existing systems, composed of a power source (4) supplying a control unit (1) driving an actuator ( 2) composed of a DC motor with brush (20) possibly associated with a mechanical set of speed transformation (9). A control system (1) acts on the combined torque and direction signals (6) grouped together in a link connector (3) to control the speed of the actuator (2). The mechanical output (12) is coupled to an external member to move as a pump body for example and in an automotive application. [00031] FIG. 2 discloses a mechatronic assembly according to the invention composed of a power source (4) supplying a control unit (1) driving an actuator (2) composed of a brushless DC motor (8) possibly associated with a set speed transformation mechanics (9). A control system (1) acts on the combined torque and direction signals (6) grouped together in a link connector (3). The position of the motor rotor (8) is read using N probes (11) which, via a rudimentary electronic circuit (10), auto-switch the N phases of the motor (8). It should be noted that the signal of the N probes (11), in the illustrations presented here, is never sent back to the control system (1) but that it is possible to send this signal back from the N probes ( 11) to the control system (1) to possibly decide a corrective action or inform the system of the actual operating state of the engine. Similarly, the probes (11) for detecting the position of the rotor can be placed near the rotor to detect the variations of the magnetic field emitted by the rotor or else offset in the form of an encoder situated upstream or downstream 25 of the rotor, a mechanical connecting shaft integrally connecting rotor and encoder. [00034] A drive system (FIG 2) is composed of a remote electronic control unit (1), called ECU, and an actuator (2) incorporating a rudimentary electronic circuit (10) exploiting the signals from a probe (11) providing information on the position of the rotor of a brushless DC motor (8) in order to auto-switch the latter. The present invention applies to any type of polyphase brushless DC motor as shown by some examples of three-phase (A and B) and two-phase (C) topologies shown in FIG. 3. For simplifications of reading, the descriptions made next will be based only on a subset of N between 2 and 3 with N being the number of phases of the brushless DC motor. The ECU (1), powered by the vehicle battery (4), executes a speed control algorithm and generates the torque and direction signals (6) for the engine which will act on the mechanical output (12) of the vehicle. the actuator (2) by means of a speed transformation mechanism (9). The electronic self-switching circuit (10) is designed such that the actuator (2) is powered by a brushless DC motor (Fig. 2) or by a DC brush motor (Fig. 1) provides compatibility in both functions and connections (3) - [00035] For economic reasons, the brushless DC motor (8) is controlled in unipolar mode requiring only three transistors. This also simplifies the self-switching circuit. A system requiring small torque variations will preferably work in 180 ° mode (Fig. 8) providing six engine pitches per electrical period compared to three pitches in the 120 ° mode (Fig. 7). The number of steps per electrical period for each of these operating modes can be deduced from the shape of the power signal (39 in Fig. 8 and 37 in Fig. 7). The minimum electronic scheme for self-switching the brushless DC motor is shown in FIG. 11 and FIG. 12 for 120 ° and 180 ° modes respectively. For each of these modes, the shape of the currents flowing in the phases of the motor is shown in FIG. 7 and FIG. 8 for the respective modes 120 ° and 180 °. The switching time of the probes is different depending on the operating mode 120 ° or 180 °. As shown in FIG. 10, the setting is advanced by 30 ° in the case of the 120 ° mode to allow, thanks to the simplified electronics described in Figure 11, to obtain a current in phase with the f.c.e.m. (electromotive force 35) (35a, 35b, 35c) guaranteeing a maximum average torque. [00037] FIG. 7 describes the course of the currents (36a, 36b, 36c) for each of the phases of the motor (8) and their respective phase with respect to the f.c.e.m. (35a, 35b, 35c) of said phase of the motor (8). This driving mode is called: 1200 unipolar mode. The curve (37) represents the shape of the engine torque. [00038] FIG. 8 describes the course of the currents (38a, 38b, 38c) for each of the phases of the motor (8) and their respective phase with respect to the f.c.e.m. (35a, 35b, 35c) of said phase of the motor (8). This control mode is called: unipolar 180 ° mode. The curve (39) represents the shape of the driving torque (8). [00039] A description in FIG. 10 gives the indications for selecting the best setting of the probes (11) with respect to the references which are the signals of f.c.e.m. (35a, 35b, 35c) generated by the phases of the motor (8). In particular, FIG. 10 shows the phasing of the signals (40a, 40b, 40c) of the probes Ha, Hb, Hc with respect to the f.c.e.m. (35a, 35b, 35c) respective coils for a self-switching mode at 120 ° as well as the phasing of the signals (41a, 41b, 41c) of the probes Ha, Hb, Hc with respect to the f.c.e.m. (35a, 35b, 35c) respective coils for a 180 ° self-switching mode. It is known to those skilled in the art that the direction of rotation of the motor can be reversed on the one hand by crossing the connections of each of the coils of the motor phases, or on the other hand by inverting the output signal of each of the probes (11). This second possibility is the chosen solution, implemented by inserting an 'EXCLUSIVE OR' function (U4a, U4b, U4c) at the output of the probes as shown in FIG. 14, to form a bidirectional control (13). A direction signal common to each of the 'EXCLUSIVE OR' gates (U4a, U4b, U4c) will or will not reverse the signal from the probe (11) and in this way will define the direction of rotation of the motor (8). This option (13) is compatible with bidirectional control in 1200 or 180 ° mode. Another embodiment (13a) shown in FIG. 15 5 makes it possible to perform this same 'EXCLUSIVE OR' function but only with discrete components (diodes, resistors and transistors) thus more easily offering a very good compatibility with high temperature environments. The truth table is GATE = NOT (DIRECTION C) HN). This method of implementation may be preferred in applications requiring compatibility at high temperatures> 125 ° C ambient [00042] The output stage of an ECU (1) driving an actuator is typically a mounting (Fig. 23 ) with four transistors (15a, 15b, 15c, 15d) forming a power bridge "H" capable of outputting (6) a positive or negative sign current defining the direction of rotation of the motor, and of variable amplitude controlled by a signal cutout (PWM) applied to the transistors (15a, 15b, 15c, 15d). [00043] The rudimentary electronic circuit (10) does not accept a supply of reverse polarity, the use of a diode rectifier bridge (27) makes it possible to separate the torque + direction (6) compound signals supplied by the ECU (1) as shown in FIG. 4. [00044] The compound direction + torque signal (6) present on the connector (3) supplies the motor (8) after rectification by a diode rectifier bridge (27). The N probes (11) indicate the switching logic (26) of the N power transistors (25) switching the currents in the N phases of the motor (8). The signal (29) taken upstream of the rectifier bridge (27) indicates the direction of rotation to the switching logic (26). A voltage regulator (28) supplies the power required for the probes (11) and the switching logic (26). The signal (29) will be taken upstream of the bridge-rectifier (27) to extract the direction signal applied to doors 'EXCLUSIVE OR' (U4a, U4b, U4c). This direction signal affected by the PWM command generated by the ECU (1) and modulating the current in the motor (8) to control the torque, it is important to shape it through a conditioner given in FIG. 18 showing an exemplary circuit for extracting the direction information contained in the torque + direction control signal (6). Fig. 19 shows the electronic scheme of a different embodiment and having the advantage of automatically adapting to the frequency of the PWM control signal generated by the ECU (1). The torque + direction control signal (6) is applied to the inputs of an RS flip-flop, composed of transistors Q12 and Q13, producing the steering signal as shown in FIG. 20. An extended electronic circuit implementing two cascaded RS flip-flops as shown in FIG. 21 makes it possible to extract a direction signal from the two-wire signal (6) irrespective of the control mode: switching on the transistors 20 'LOW SIDE' or switching on the transistors 'HIGH SIDE' (mode dependent on the control algorithm of the ECU (1)). The signals produced by these flip-flops are shown in FIG. 22. [00046] For applications where the bidirectional function of the actuator (2) would not be necessary, it is conceivable to simplify the electronic scheme and to conform to that proposed in FIG. 5. In this case, the signal (6) delivered by the ECU (1) contains only the torque information. Since the polarity of this signal is fixed, the rectifier bridge (27) is no longer essential, as is the extraction circuit 30 of the direction signal (FIG 18) and the functions 'EXCLUSIVE OR' (U4a, U4b, U4c). ). The power signal (6) present on the connector (3) feeds the motor (8). The N probes (11) indicate the switching logic (26) of the N power transistors (25) switching the currents in the N phases of the motor (8). A voltage regulator (28) supplies the power required for the probes (11) and the switching logic (26). In order to maintain compatibility with the 5 existing actuator systems, the power source (28) of the probes (11) and the rudimentary electronic circuit (10) must be extracted from the signals available via the connector (3). [00049] The power source comes from the power signal supplied by the ECU, as shown in FIG. 6. The regulator circuit (28) provides a continuous signal (34) of adequate amplitude from a chopped signal (33). Here the voltage regulator (28) is fed by the control signal (6). The diode (29) / capacitor (30) circuit makes it possible to store the energy transmitted by the control PWM signal (33) during the time T. The resistance circuit (31) / zener diode (32) limits the voltage to a value acceptable by the components of the auto-switching electronics (26). The ECU (1) must nevertheless provide a minimum power signal so that the capacitor (30) can be recharged during the period T. The diode (29) prevents the capacitor (30) from being discharged in the phases of the motor. (8). The components used in this solution remain very basic, it is possible to choose them in a catalog with operating temperatures above 125 ° C. The invention presented previously on the basis of an example of three-phase motor can equally well apply to a polyphase motor having 1 to N coils. [00052] A particular embodiment method is shown in FIG. 13, involving a brushless DC motor two-phase four halves (N = 2). Two probes (Ha and Hb) directly control the state of the N phases A and B with the aid of four power switches (Q8, Q9, Q10 and Q11). The detection block (13) can also integrate the "EXCLUSIVE OR" function as shown in FIG. 14 and FIG. 15 for applications requiring bidirectional control of the brushless DC motor. It is known to those skilled in the art that the commutations of a power switch in series with an inductive load such as the coil of a phase of a motor generates an overvoltage according to the formula: E = -Ld (i ) / d (t). In the conventional diagrams with three-phase motors (eg Fig. 11 and Fig. 12), the V (BR) DSS (Drain-to-Source Breakdown Voltage) characteristic of the MOSFET transistor is strongly stressed during the demagnetization phases of the coil. . As a result, the transistor must be dimensioned accordingly.
    [0004] In the particular embodiment of the method employing a brushless DC DC motor (Fig. 13), it is advantageous to favor a so-called "two-wire-in-hand" winding in order to benefit from a very good coupling. between the half-coils of each phase. Thus obtaining a large mutual inductance Phase A + / Phase A- and Phase B + / Phase B-, the magnetic flux will switch from the coil "Phase A +" to the coil "Phase A-" when opening the switch. power Q8 (Q9 being driven in a complementary manner). From this coupling, the overvoltage across the power switches will be limited to twice the supply voltage (PWR +). This also applies to the other motor phase: PhaseB + / PhaseB-, Q10, Q11. The invention presented previously on the basis of a self-switching electronics (26) operating a unipolar drive (the current flows in only one direction of the winding) of the brushless DC motor (8), remains applicable to a particular embodiment offering bipolar steering (the current flows in both directions of winding). Fig. 16 depicts the schematic diagram of this particular embodiment; the control logic (14) of the six power transistors 35 (Q1, Q1 ', Q2, Q2', Q3, Q3 ') responds to the truth table shown in this same figure. This embodiment method will be reserved for applications requiring better performance and / or a smaller footprint of the engine. In return, the rudimentary electronic circuit (10) will be composed of six power transistors (three more), and its associated control logic (14) will be more complex than the basic diagrams FIG. 11 and FIG. 12. Another example of a particular embodiment offering the same advantages, with a compromise on the optimization of the engine, is presented in FIG. 17 with his truth table. The difference lies in the use of half-coils.
    权利要求:
    Claims (11)
    [0001]
    REVENDICATIONS1. Mechatronic assembly for driving an element comprising a control unit (1) and an actuator (2), the control unit (1) comprising a servo control algorithm and a power bridge, said algorithm driving said bridge the power bridge providing a two-wire electrical signal (6) composed of a power signal and a steering signal, the actuator (2) comprising a polyphase N-phase brushless electric motor (8), binary sensors (11) for detecting the position of the rotor of said motor (8), power switches (25) capable of supplying the N phases of the motor (8) from the two-wire electrical signal (6), characterized in that that the state of the power switches (25) is directly controlled by a signal from the detection probes (11).
    [0002]
    2. A mechatronic assembly for driving an element according to claim 1 characterized in that the motor (8) polyphase 20 phase N consists of N unipolar or bipolar coils, or N * 2 unipolar half-coils.
    [0003]
    3. Mechatronic assembly for driving an element according to claim 1 or 2, characterized in that the direction of rotation of the motor (8) is imposed by an elementary combinational logic constructed from the polarity of the two-wire electrical signal ( 6) and the signal of the detection probes (11).
    [0004]
    4. Mechatronic assembly for driving an element according to one of claims 1 to 3 characterized in that the probes (11) for detecting binary rotor position are fed by the two-wire electrical signal (6).
    [0005]
    5. Mechatronic assembly for driving an element according to claim 1 to 4, characterized in that the bifilar electrical signal (21) is a continuous signal whose amplitude and sign are controlled by the algorithm of FIG. servo contained in the control unit (1).
    [0006]
    6. Mechatronic assembly for driving an element according to one of claims 1 to 5 characterized in that the bifilar signal (6) is a chopped signal whose duty cycle is controlled by the servo algorithm contained in the control unit (1).
    [0007]
    7. Mechatronic assembly for driving a member 10 according to one of the preceding claims characterized in that the two-wire signal (6) is rectified by a diode bridge (27) to route the N phases of the motor a positive current.
    [0008]
    Mechatronic assembly for driving an element according to Claims 3 and 6, characterized in that the direction of rotation of the motor (8) is determined by a direction signal extracted from the two-wire signal (6) using one or two latches making it independent of the frequency and the duty cycle of said two-wire signal (6).
    [0009]
    9. Mechatronic assembly for driving a member 20 according to the preceding claims, characterized in that the motor (8) consists of a half-coil with strong magnetic coupling limiting the dissipation in the power switches (25) during the phases. demagnetizing the said coil. 25
    [0010]
    10. A fluid drive pump consisting of a mechatronic assembly provided with a control unit (1) comprising a servo control algorithm and a power bridge, said algorithm driving said power bridge, the power bridge delivering a two-wire electrical signal (6) composed of a power signal and a direction signal, the actuator (2) comprising an N-phase polyphase brushless electric motor (8), binary detection probes (11) the position of the rotor of said motor (8), the power switches (25) able to feed the N phases of the motor (8) from the two-wire electrical signal (6), characterized in that the state of the power switches (25) is controlled directly by a signal from the sensor probes (11).
    [0011]
    An automotive camshaft dephaser consisting of a mechatronic assembly provided with a control unit (1) comprising a servo control algorithm and a power bridge, said algorithm driving said power bridge, the power bridge delivering a two-wire electrical signal (6) composed of a power signal and a direction signal, the actuator (2) comprising a polyphase N-phase brushless electric motor (8), binary detection probes (11). the position of the rotor of said motor (8), the power switches (25) able to supply the N phases of the motor (8) from the two-wire electrical signal (6), characterized in that the state of the power switches (25) is controlled directly by a signal from the sensor probes (11).
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    同族专利:
    公开号 | 公开日
    JP2017519475A|2017-07-13|
    US20170194885A1|2017-07-06|
    FR3022414B1|2016-07-01|
    EP3155717A2|2017-04-19|
    WO2015189121A3|2016-03-10|
    WO2015189121A2|2015-12-17|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP0148347A1|1980-05-15|1985-07-17|Comair Rotron Inc|Brushless D.C. Motors|
    FR2636182A1|1988-09-05|1990-03-09|Technologique Sarl Comp|Control circuit for commutatorless DC motor, especially for fan|
    US5317245A|1992-10-29|1994-05-31|Mfm Technology, Inc.|Brushless DC motor control network|
    WO1998019386A1|1996-10-31|1998-05-07|Mfm Technology, Inc.|Two-wire brushless dc motor control system|
    US5903117A|1997-10-28|1999-05-11|Xomed Surgical Products, Inc.|Method and adaptor for connecting a powered surgical instrument to a medical console|
    WO2003095803A1|2002-05-10|2003-11-20|Ina-Schaeffler Kg|Camshaft adjuster with an electrical drive|
    US7225773B2|2004-02-20|2007-06-05|Bayerische Motoren Werke Aktiengesellschaft|Variable stroke valve drive for an internal combustion engine|
    FR2815189B1|2000-10-06|2003-01-03|Moving Magnet Tech|ELECTRIC MOTORCYCLE WITHOUT BRUSH SELF-CURRENT ON AN ABSOLUTE POSITION SIGNAL|FR3021819B1|2014-06-03|2016-06-03|Mmt Sa|LINEAR REVERSIBLE LINEAR ACTUATOR WITH BIFILAR CONTROL|
    US10454403B2|2016-02-05|2019-10-22|Cts Corporation|Axial brushless DC motor with fractional and hold step function|
    CN109314455A|2016-05-19|2019-02-05|Cts公司|With substep and the axial Brushless DC motor for walking function admittedly|
    KR101936476B1|2016-12-14|2019-01-08|현대자동차주식회사|Brushless DC electric motor driving control method of Electrical Water Pump|
    法律状态:
    2015-05-26| PLFP| Fee payment|Year of fee payment: 2 |
    2015-12-18| PLSC| Search report ready|Effective date: 20151218 |
    2016-05-26| PLFP| Fee payment|Year of fee payment: 3 |
    2017-05-23| PLFP| Fee payment|Year of fee payment: 4 |
    2018-05-25| PLFP| Fee payment|Year of fee payment: 5 |
    2020-05-20| PLFP| Fee payment|Year of fee payment: 7 |
    2021-05-19| PLFP| Fee payment|Year of fee payment: 8 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1455348A|FR3022414B1|2014-06-12|2014-06-12|MECATRONIC ASSEMBLY FOR DRIVING AN EXTERNAL BODY USING A BRUSHLESS MOTOR AND A SINGLE ASSEMBLY OF ELECTRONIC COMPONENTS.|FR1455348A| FR3022414B1|2014-06-12|2014-06-12|MECATRONIC ASSEMBLY FOR DRIVING AN EXTERNAL BODY USING A BRUSHLESS MOTOR AND A SINGLE ASSEMBLY OF ELECTRONIC COMPONENTS.|
    US15/313,348| US20170194885A1|2014-06-12|2015-06-08|Mechatronic assembly for driving an external member using a brushless motor and a simple assembly of electronic components|
    EP15725680.1A| EP3155717A2|2014-06-12|2015-06-08|Mechatronic assembly for driving an outer member using a brushless motor and a basic assembly of electronic components|
    JP2016572263A| JP2017519475A|2014-06-12|2015-06-08|Mechatronic assembly that drives external members using a brushless motor and simplified assembly of electronic components|
    PCT/EP2015/062657| WO2015189121A2|2014-06-12|2015-06-08|Mechatronic assembly for driving an outer member using a brushless motor and a basic assembly of electronic components|
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