Motor drive system, vehicle, and drive system control method

Abstract

A motor drive system, a vehicle, and a drive system control method are provided. The system includes a heating controller, a motor controller, and a drive motor. The heating controller generates a plurality of PWM signals and outputs the plurality of PWM signals to the motor controller to control the motor controller to output an alternating current to the stator when the vehicle is in a parked state and a heating request is received, so that the stator and the rotor generate heat in a stationary state and heat can be conducted to a device that issues a heating request.

Description

Technical Field

[0001] Cross - reference to Related Applications This disclosure claims priority to Chinese Patent Application No. 202210761267.7, entitled "MOTOR DRIVING SYSTEM, VEHICLE AND DRIVING SYSTEM CONTROL METHOD", filed on June 29, 2022, which is incorporated herein by reference in its entirety.

[0002] This disclosure relates to the field of vehicle technology, In particular and relates to a motor driving system, a vehicle, and a driving system control method.

Background Art

[0003] Considering the case when a vehicle is used in a low - temperature environment, , add it is further necessary to have a heat function. In other words, it is necessary to heat a low - temperature device or the cabin inside the vehicle. . In order to improve the charging and discharging capabilities of the battery in a low-temperature environment, For example, it is necessary to heat the battery. At present, usually, an additional heating device is used to heat the low - temperature device, which reduces the heating efficiency and increases the cost of the vehicle.

Summary of the Invention

Means for Solving the Problems

[0004] To overcome the problems in the related art, this disclosure provides a motor driving system, a vehicle, and a driving system control method.

[0005] To achieve the above object, according to a first aspect, this disclosure provides a heating controller, a motor controller connected to the heating controller, and a driving motor connected to the heating controller and connected to the motor controller. A motor driving system is provided.

[0006] The heating controller detects that the vehicle is in a parked state, and the heating request emitted by the device received are when a plurality of subjected to pulse width modulation ( PWM signals ) are generated and 、P the WM signals are output to the motor controller to control the motor controller to output an alternating current to the stator of the drive motor to perform and is configured to . the stator and rotor of the drive motor generate heat in a stationary state , the device and conduct heat to the placement.

[0007] In one embodiment The heating controller is configured to generate a plurality of PWM signals based on the q-axis reference current, d-axis reference current, as well as the three-phase current of the drive motor and the rotor angle parameter information.

[0008] In one embodiment The heating controller a heating current processing module configured to generate a q-axis target current and a d-axis target current based on the q-axis reference current and the d-axis reference current, a current collection module connected to the drive motor and configured to collect the three-phase current, an angle acquisition module connected to the drive motor and configured to acquire the rotor angle parameter information, the current collection module and the angle acquisition module is connected to subsequently, a current conversion module configured to generate a q-axis feedback current and a d-axis feedback current based on the three-phase current and the angle parameter information, the heating current processing module and the current conversion module is connected to subsequently, a current adjustment module configured to generate a q-axis voltage and a d-axis voltage based on the q-axis target current, d-axis target current, q-axis feedback current, and d-axis feedback current, the current adjustment module and the angle acquisition module is connected toA waveform processing module configured to generate a plurality of PWM signals based on the q-axis voltage, d-axis voltage, and angle parameter information is included.

[0009] In one embodiment The alternating current is a high-frequency alternating current, The heating current processing module generates a q-axis high-frequency sine wave current based on the q-axis reference current and and the periphery the wave number, and generates a d-axis high-frequency sine wave current based on the d-axis reference current and and the periphery the wave number, and a high-frequency current generation unit configured to perform the above, A current determination unit connected to the high-frequency current generation unit, configured to determine a q-axis target current from the q-axis reference current and the q-axis high-frequency sine wave current, and determine a d-axis target current from the d-axis reference current and the d-axis sine wave current is included.

[0010] In one embodiment The high-frequency current generation unit A first channel configured to output a q-axis reference current, A second channel configured to output a d-axis reference current, A first generation unit configured to generate a q-axis high-frequency sine wave current based on the q-axis reference current and and the periphery the wave number, A second generation unit configured to generate a d-axis high-frequency sine wave current based on the d-axis reference current and and the periphery the wave number is included.

[0011] In one embodiment The current determination unit A first switch unit, A first movable terminal, A first non-movable terminal connected to the first channel, and A second non-movable terminal connected to the first generation unit A first switch unit including, A second switch unit, A second movable terminal, A third fixed terminal connected to a second channel, and A fourth fixed terminal connected to a second generating unit A second switch unit including, Individually connected to the first movable terminal and the second movable terminal, controlling the first movable terminal to continue one of the first fixed terminal and the second fixed terminal is connected to To select a q-axis target current from a q-axis reference current and a q-axis high-frequency sine wave current, and controlling the second movable terminal to continue one of the third fixed terminal and the fourth fixed terminal is connected to To select a d-axis target current from a d-axis reference current and a d-axis sine wave current, and a first control unit configured to do so Including.

[0012] In one embodiment , The angle acquisition module includes A third switch unit including a third movable terminal, a fifth fixed terminal, and a sixth fixed terminal, An angle acquisition unit connected to the fifth fixed terminal and configured to collect the current position angle of the rotor accommodates And, An angle simulation unit connected to the sixth fixed terminal and configured to generate a simulated angle based on the phase information and angular velocity information of the drive motor, Connected to the third movable terminal, controlling the third movable terminal to continue one of the fifth fixed terminal and the sixth fixed terminal is connected to To select rotor angle parameter information from the current position angle and the simulated angle, and a second control unit configured to do so Including.

[0013] One or two of the first fixed terminal, the third fixed terminal, and the fifth fixed terminal are connected to the corresponding movable terminal.

[0014] In one embodiment When the third movable terminal is connected to the sixth non - movable terminal, the first movable terminal is connected to one of the first non - movable terminal and the second non - movable terminal, and the second movable terminal is connected to one of the third non - movable terminal and the fourth non - movable terminal.

[0015] In one embodiment When the third movable terminal is connected to the fifth non - movable terminal, the first movable terminal is connected to the second non - movable terminal, the second movable terminal is connected to one of the third non - movable terminal and the fourth non - movable terminal, or the first movable terminal is connected to the first non - movable terminal, and the second movable terminal is connected to the fourth non - movable terminal.

[0016] In one embodiment The alternating current is a high - frequency alternating current, and the high - frequency alternating current The current is greater than 300 Hz has a frequency .

[0017] According to a second aspect, the present disclosure provides a vehicle including the motor drive system provided in the first aspect of the present disclosure.

[0018] According to a third aspect, the present disclosure detects that the vehicle is in a parked state, and the receives a heating request emitted by the device when, generates a plurality of PWM signals, are generates an alternating current based on the plurality of PWM signals, applies the alternating current to the stator of the drive motor and causes heat to be generated in a stationary state in the stator and rotor of the drive motor subjected to, and in that state, and conducts the heat to a device that issues a heating request, is and provides a method for controlling a motor drive system. subjected to

[0019] ​​In the above technical solution, the motor drive system includes a heating controller, a motor controller, and a drive motor. The heating controller detects that the vehicle is in a parked state, and when a heating request is received, generates a plurality of PWM alternating current signals, outputs the plurality of PWM alternating current signals to the motor controller, and controls the motor controller to output an alternating current to the stator of the drive motor, as a result, the stator and the rotor of the drive motor generate heat in a stationary state and conduct the heat to a device that issues a heating request. The alternating current generates a high-frequency rotating magnetic field in the stator, and as a result, high-frequency eddy currents are induced on the rotor of the drive motor. Since the rotation speed of the magnetic field is relatively fast, the rotor cannot follow the high-speed rotating magnetic field of the stator and is in a state similar to motor stall. The rotor is in a stationary state and generates more heat in the drive motor. In addition, since the alternating current flows through the stator, the stator also generates heat. In this way, when the vehicle is parked and heating is required, the existing motor drive system on the vehicle is reused to generate heat, heat the device that issues a heating request, improve the heating capacity and heating efficiency of the entire vehicle, and furthermore, eliminate additional heating devices. As a result, the components of the vehicle are unified, the volume is reduced, and the cost of the vehicle is reduced.

[0020] Other features and advantages of the present disclosure will be described in detail in the following description of the embodiments.

[0021] The accompanying drawings provide a further understanding of the present disclosure subjected to , and form part of this specification. The accompanying drawings are used together with the following description of the embodiments to explain the present disclosure, but do not constitute a limitation of the present disclosure.

Brief Description of the Drawings

[0022]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Mode for Carrying Out the Invention

[0023] The description of the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. The description of the embodiments described herein is used only for explaining and illustrating the present disclosure, and it should be understood that it does not limit the present disclosure. is also It should not be so.

[0024] FIG. 1 is a block diagram of a motor drive system according to an exemplary embodiment. As shown in FIG. 1, the motor drive system includes a heating controller 10, a motor controller 20, and a drive motor 30. The motor controller 20 is connected to the drive motor 30, and the heating controller 10 is individually connected to the motor controller 20 and the drive motor 30.

[0025] When the heating controller 10 detects that the vehicle is in a parked state and a heating request is received, it generates a plurality of PWM alternating current signals and outputs the plurality of PWM signals to the motor controller 20 to control the motor controller 20 to output an alternating current to the stator of the drive motor 30. As a result, the stator and rotor of the drive motor 30 generate heat in a stationary state and conduct heat to a device that issues a heating request.

[0026] For example, the device that issues a heating requirement may be a battery. In this way, when the vehicle is parked, the existing motor drive system on the vehicle can be reused to generate heat to heat the battery, thereby improving the charging performance and discharging performance of the battery.

[0027] In one embodiment , the heating controller 10 may generate a plurality of PWM signals based on the q-axis reference current, the d-axis reference current, and the three-phase current of the drive motor 30 and the angle parameter information of the rotor.

[0028] In the present disclosure, the three-phase current of the three-phase winding of the drive motor 30 may be collected using a three-phase current sensor. The angle parameter information of the rotor may be the position angle information of the rotor.

[0029] The motor controller 20 generates an alternating current signal based on a plurality of PWM alternating current signals and outputs the alternating current signal to the stator of the drive motor 30 to generate a high-frequency rotating magnetic field in the stator. Furthermore, a high-frequency eddy current is induced on the rotor of the drive motor, and the rotor generates heat due to eddy current loss. Since the rotation speed of the high-frequency rotating magnetic field is relatively fast, the rotor cannot follow the high-speed rotating magnetic field of the stator and enters a state similar to motor stall. The rotor is in a stationary state, causing the drive motor to generate more heat. In this way, the rotor of the drive motor 30 generates a high-frequency eddy current in a stationary state to generate heat. In addition, since the alternating current flows through the stator, the stator of the drive motor 30 also generates heat.

[0030] In the above technical solution, the motor drive system includes a heating controller, a motor controller, and a drive motor. The heating controller detects that the vehicle is in a parked state, and when a heating request is received, generates a plurality of PWM alternating current signals, outputs the plurality of PWM alternating current signals to the motor controller to control the motor controller to output an alternating current to the stator of the drive motor, as a result, the stator and rotor of the drive motor generate heat in a stationary state and conduct the heat to the device that issues the heating request. The alternating current generates a high-frequency rotating magnetic field in the stator, as a result, high-frequency eddy currents are induced on the rotor of the drive motor. Because the rotation speed of the magnetic field is relatively fast, the rotor cannot follow the high-speed rotating magnetic field of the stator and is in a state similar to motor stall. The rotor is in a stationary state and generates more heat in the drive motor. In addition, since the alternating current flows through the stator, the stator also generates heat. In this way, when the vehicle is parked and heating is required, the existing motor drive system on the vehicle is reused to generate heat to heat the device that issues the heating request, improving the heating capacity and heating efficiency of the entire vehicle, and further eliminating the need for additional heating devices. As a result, the components of the vehicle are unified, the volume is reduced, and the cost of the vehicle is reduced.

[0031] As shown in FIG. 2, the motor controller 20 includes a bus capacitor C and a three-phase inverter (i.e., six switching transistors). The drive motor 30 includes three-phase windings (i.e., a, b, and c). The three-phase windings are respectively connected to the midpoints of the three-phase bridge arms of the three-phase inverter. The first bus terminal of the three-phase inverter is connected to the terminal of the bus capacitor C and the terminal of the switch K0. The second bus terminal of the three-phase inverter is connected to the other terminal of the bus capacitor C and the negative electrode of the battery 3. The other terminal of the switch K0 is connected to the negative electrode of the battery 3.

[0032] As shown in FIG. 2, the heating controller 10 includes a heating current processing module S1, a current adjustment module S2, a waveform processing module S3, a current conversion module S4, a current collection module S5, and an angle acquisition module S6.

[0033] The current collection module S5 is connected to the drive motor 30 ( For example , and is connected to the three-phase windings of the drive motor 30), and is configured to collect the three-phase currents of the drive motor 30, that is, Ia, Ib, and Ic. The current collection module S5 may be a three-phase current sensor.

[0034] The angle acquisition module S6 is connected to the drive motor 30 and is configured to acquire the angle parameter information θ of the rotor.

[0035] The current conversion module S4 is individually connected to the current collection module S5 and the angle acquisition module S6, and is configured to generate a q-axis feedback current iq_fb and a d-axis feedback current id_fb based on the three-phase currents (Ia, Ib, and Ic) and the angle parameter information θ of the rotor.

[0036] The heating current processing module S1 is configured to generate a q-axis target current iq_sec and a d-axis target current id_sec based on a q-axis reference current iq_ref and a d-axis reference current id_ref.

[0037] The current adjustment module S2 is individually connected to the heating current processing module S1 and the current conversion module S4, and is configured to generate a q-axis voltage Uq and a d-axis voltage Ud based on the q-axis target current iq_sec, the d-axis target current id_sec, the q-axis feedback current iq_fb, and the d-axis feedback current id_fb. In one embodimentThe current adjustment module S2 may execute PI control based on the difference between the q-axis target current iq_sec and the q-axis feedback current iq_fb to obtain the q-axis voltage Uq, and execute PI control based on the difference between the d-axis target current id_sec and the d-axis feedback current id_fb to obtain the d-axis voltage Ud.

[0038] The waveform processing module S3 is individually connected to the current adjustment module S2 and the angle acquisition module S6, and is configured to generate a plurality of PWM alternating current signals based on the q-axis voltage Uq, the d-axis voltage Ud, and the rotor angle parameter information θ. The waveform processing module S3 , air is a space vector pulse width modulation (SVPWM) module, and is configured to generate a plurality of PWM alternating current signals based on the q-axis voltage Uq, the d-axis voltage Ud, and the rotor angle parameter information θ according to the space voltage vector pulse width modulation method. The plurality of PWM alternating current signals , Figure are the six PWM alternating current signals shown in FIG. 2, that is, PWM×6.

[0039] The alternating current may be a high-frequency alternating current. For example, the frequency of the high-frequency alternating current is greater than 300 Hz. In this case, as shown in FIG. 3, the heating current processing module S1 may include a high-frequency current generation unit S11 and a current determination unit S12.

[0040] The high-frequency current generation unit S11 is configured to generate a q-axis high-frequency sine wave current based on the q-axis reference current iq_ref and the preset frequency f, and generate a d-axis high-frequency sine wave current based on the d-axis reference current id_ref and the preset frequency f.

[0041] The current determination unit S12 is connected to the high-frequency current generation unit S11 and is configured to determine the q-axis target current iq_sec from the q-axis reference current iq_ref and the q-axis high-frequency sine wave current, and to determine the d-axis target current id_sec from the d-axis reference current id_ref and the d-axis sine wave current.

[0042] In one embodiment As shown in FIG. 4, the high-frequency current generation unit S11 includes a first channel S111, a second channel S112, a first generation unit S113, and a second generation unit S114, and the current determination unit S12 includes a first switch unit K1, a second switch unit K2, and a first control unit (not shown in FIG. 4).

[0043] The first channel S111 is configured to output the q-axis reference current iq_ref. The second channel S112 is configured to output the d-axis reference current id_ref. The first generation unit S113 is configured to generate a q-axis high-frequency sine wave current based on the q-axis reference current iq_ref and a preset frequency f. The second generation unit S114 is configured to generate a d-axis high-frequency sine wave current based on the d-axis reference current id_ref and the preset frequency f.

[0044] For example, the q-axis high-frequency sine wave current is iq_ref*sin2πft, and the d-axis high-frequency sine wave current is id_ref*sin2πft, where t is time.

[0045] As shown in FIG. 4, the first switch unit K1 includes a first movable terminal K11, a first fixed terminal K12, and a second fixed terminal K13. The first fixed terminal K12 is connected to the first channel S111, and the second fixed terminal K13 is connected to the first generation unit S113.

[0046] The second switch unit K2 includes a second movable terminal K21, a third fixed terminal K22, and a fourth fixed terminal K23. The third fixed terminal K22 is connected to the second channel S112, and the fourth fixed terminal K23 is connected to the second generating unit S114.

[0047] The first control unit is individually connected to the first movable terminal K11 and the second movable terminal K21, and is configured to control the first movable terminal K11 to selectively connect to one of the first fixed terminal K12 and the second fixed terminal K13, so as to select a q-axis target current from a q-axis reference current and a q-axis high-frequency sine-wave current, and control the second movable terminal K21 to selectively connect to one of the third fixed terminal K22 and the fourth fixed terminal K23, so as to select a d-axis target current from a d-axis reference current and a d-axis sine-wave current.

[0048] In one embodiment When the first movable terminal K11 is connected to the first fixed terminal K12, the q-axis target current iq_sec is the q-axis reference current iq_ref, that is, the q-axis target current iq_sec is a direct current. When the first movable terminal K11 is connected to the second fixed terminal K13, the q-axis target current iq_sec is the q-axis high-frequency sine-wave current iq_ref*sin2πft, that is, the q-axis target current iq_sec is a high-frequency alternating current. When the second movable terminal K21 is selectively connected to the fourth fixed terminal K23, the d-axis target current id_sec is the d-axis high-frequency sine-wave current id_ref*sin2πft, that is, the d-axis target current id_sec is a high-frequency alternating current. When the second movable terminal K21 is selectively connected to the third fixed terminal K22, the d-axis target current id_sec is the d-axis reference current id_ref, that is, the d-axis target current id_sec is a direct current.

[0049] As shown in FIG. 5, the angle acquisition module S6 includes a third switch unit K3, an angle acquisition unit S61, an angle simulation unit S62, and a second control unit (not shown in FIG. 5).

[0050] The third switch unit K3 includes a third movable terminal K31, a fifth fixed terminal K32, and a sixth fixed terminal K33.

[0051] The angle acquisition unit S61 is connected to the fifth fixed terminal K32 and is configured to directly acquire the current position angle θ1 of the rotor. For example, the angle acquisition unit S61 may be a position sensor.

[0052] The angle simulation unit S62 is connected to the sixth fixed terminal K33 and is configured to generate a simulated angle based on the phase information and angular velocity information of the drive motor 30.

[0053] For example, [Number] where ω is the angular velocity information of the rotor of the drive motor 30, [Number] is the phase information of the rotor of the drive motor 30 and may be any phase angle.

[0054] The second control unit is connected to the third movable terminal K31 and is configured to control the third movable terminal K31 to be selectively connected to one of the fifth fixed terminal K32 and the sixth fixed terminal K33, so as to select the angle parameter information of the rotor from the current position angle θ1 and the simulated angle θ2 of the rotor.

[0055] In one embodiment When the third movable terminal K31 is connected to the fifth fixed terminal K32, the angle parameter information of the rotor is the current position angle θ1. When the third movable terminal K31 is connected to the sixth fixed terminal K33, the angle parameter information of the rotor is the simulated angle θ2.

[0056] In the present disclosure, in order for the waveform processing module S3 to be able to generate a plurality of PWM alternating current signals, it is necessary to ensure that the rotor angle parameter information is the simulated angle θ2, and / or at least one of the q-axis target current iq_sec and the d-axis target current id_sec is a high-frequency alternating current. As a result, the motor controller 20 outputs a high-frequency alternating current to the stator of the drive motor 30. Specifically, in order for the waveform processing module S3 to be able to generate a plurality of PWM alternating current signals, the following three conditions are required: (1) the rotor angle parameter information is the simulated angle θ2, (2) the q-axis target current iq_sec is a high-frequency alternating current, and (3) the d-axis target current id_sec is a high-frequency alternating current, and at least one of them needs to be satisfied.

[0057] Therefore, in order for the waveform processing module S3 to be able to generate a plurality of PWM alternating current signals, at least one of the second non-movable terminal K13, the fourth non-movable terminal K23, and the sixth non-movable terminal K33 needs to be connected to the corresponding movable terminal. In other words, one or two of the first non-movable terminal K12, the third non-movable terminal K22, and the fifth non-movable terminal K32 need to be connected to the corresponding movable terminal. In other words, each of the first non-movable terminal K12, the third non-movable terminal K22, and the fifth non-movable terminal K32 needs to be connected to the corresponding movable terminal cannot be Yes.

[0058] In one embodiment , in order for the waveform processing module S3 to be able to generate a plurality of PWM alternating current signals, the following condition (1) or condition (2) needs to be satisfied.

[0059] Condition (1): When the rotor angle parameter information is the current position angle θ1 of the rotor, the q-axis target current iq_sec and / or the d-axis target current id_sec is a high-frequency sine-wave current. In other words, at least one of the q-axis target current iq_sec and the d-axis target current id_sec is a high-frequency sine-wave current (a sine-wave current is an alternating current), or in other words, at least one of the q-axis target current iq_sec and the d-axis target current id_sec is a high-frequency alternating current.

[0060] Similarly, when the third movable terminal K31 is connected to the fifth immovable terminal K32, the first movable terminal K11 is connected to the second immovable terminal K13, the second movable terminal K21 is connected to one of the third immovable terminal K22 and the fourth immovable terminal K23, or the first movable terminal K11 is connected to the first immovable terminal K12, and the second movable terminal K21 is connected to the fourth immovable terminal K23.

[0061] Condition (2): When the rotor angle parameter information is the simulated angle θ2, the q-axis target current iq_sec may be a direct current (in other words, the q-axis reference current iq_ref), or may be a high-frequency sine-wave current. The d-axis target current id_sec may be a direct current (in other words, the d-axis reference current id_ref), or may be a high-frequency sine-wave current.

[0062] Similarly, when the third movable terminal K31 is connected to the sixth immovable terminal K33, the first movable terminal K11 is connected to one of the first immovable terminal K12 and the second immovable terminal K13, and the second movable terminal K21 is connected to one of the third immovable terminal K22 and the fourth immovable terminal K23.

[0063] In the above implementation form , waveTo cause the shape processing module S3 to generate a plurality of PWM AC current signals, a simulated angle θ2 is used, and / or at least one of the q-axis target current and the d-axis target current id_sec is guaranteed to be a high-frequency AC current. In this way, the motor controller 20 outputs a high-frequency AC current to the stator of the drive motor 30. As a result, the stator generates a high-frequency rotating magnetic field, and further, a high-frequency eddy current is induced on the rotor of the drive motor, and the rotor generates heat due to eddy current loss. In addition, since the high-frequency AC current flows through the stator, the stator also generates heat.

[0064] The present disclosure further provides a vehicle including the above motor drive system provided in the present disclosure.

[0065] FIG. 6 is a flowchart of a method for controlling a motor drive system according to an exemplary embodiment. As shown in FIG. 6, the method may include S601 to S603.

[0066] In S601, when it is detected that the vehicle is in a parked state and a heating request is received, a plurality of PWM signals are generated.

[0067] In S602, an AC current is generated based on the plurality of PWM signals.

[0068] In S603, an AC current is applied to the stator of the drive motor to generate heat in the stator and rotor of the drive motor in a stationary state, and conduct the heat to a device that issues a heating request.

[0069] When it is detected that the vehicle is in a parked state and a heating request is received, a plurality of PWM alternating current signals are generated, and an alternating current is generated based on the plurality of PWM alternating current signals. Then, the alternating current is applied to the stator of the drive motor to generate heat in a stationary state in the stator and rotor of the drive motor and conduct the heat to a device that issues a heating request. The alternating current generates a high-frequency rotating magnetic field in the stator, and as a result, high-frequency eddy currents are induced on the rotor of the drive motor. Since the rotational speed of the magnetic field is relatively fast, the rotor cannot follow the high-speed rotating magnetic field of the stator and enters a state similar to motor stall. The rotor is in a stationary state, generating more heat in the drive motor. In addition, since the alternating current flows through the stator, the stator also generates heat. Thus, when the vehicle is parked and heating is required, heat is generated to heat the device that issues a heating request, improving the overall heating capacity and efficiency of the vehicle, and furthermore eliminating the need for additional heating devices. As a result, the components of the vehicle are unified, the volume is reduced, and the cost of the vehicle is reduced.

[0070] In one embodiment , generating a plurality of PWM signals includes generating a plurality of PWM signals based on the q-axis reference current, the d-axis reference current, the three-phase current of the drive motor 30, and the angle parameter information of the rotor.

[0071] In one embodiment , generating a plurality of PWM signals based on the q-axis reference current, the d-axis reference current, the three-phase current of the drive motor 30, and the angle parameter information of the rotor includes acquiring the three-phase current and the angle parameter information of the rotor, and generating a q-axis target current and a d-axis target current based on the q-axis reference current and the d-axis reference current, and generating a q-axis feedback current and a d-axis feedback current based on the three-phase current and the angle parameter information, and generating a q-axis voltage and a d-axis voltage based on the q-axis target current, the d-axis target current, the q-axis feedback current, and the d-axis feedback current, and Generating a plurality of PWM signals based on the q-axis voltage, d-axis voltage, and angle parameter information including.

[0072] In one embodiment wherein the alternating current is a high-frequency alternating current, and generating the q-axis target current and the d-axis target current based on the q-axis reference current and the d-axis reference current includes generating a q-axis high-frequency sine wave current based on the q-axis reference current and a preset frequency, and generating a d-axis high-frequency sine wave current based on the d-axis reference current and the preset frequency determining the q-axis target current from the q-axis reference current and the q-axis high-frequency sine wave current, and determining the d-axis target current from the d-axis reference current and the d-axis sine wave current by using a current determination unit including.

[0073] In one embodiment wherein generating a q-axis high-frequency sine wave current based on the q-axis reference current and a preset frequency, and generating a d-axis high-frequency sine wave current based on the d-axis reference current and the preset frequency includes outputting the q-axis reference current by using a first channel outputting the d-axis reference current by using a second channel generating a q-axis high-frequency sine wave current based on the q-axis reference current and the preset frequency by using a first generating unit generating a d-axis high-frequency sine wave current based on the d-axis reference current and the preset frequency by using a second generating unit including.

[0074] wherein determining the q-axis target current from the q-axis reference current and the q-axis high-frequency sine wave current, and determining the d-axis target current from the d-axis reference current and the d-axis sine wave current includes Controlling the first movable terminal of the first switch unit to be selectively connected to one of the first fixed terminal and the second fixed terminal of the first switch unit to select a q-axis target current from the q-axis reference current and the q-axis high-frequency sine wave current, and controlling the second movable terminal of the second switch unit to be selectively connected to one of the third fixed terminal and the fourth fixed terminal of the second switch unit to select a d-axis target current from the d-axis reference current and the d-axis sine wave current including

[0075] The first fixed terminal is connected to the first channel, and the second fixed terminal is connected to the first generating unit.

[0076] The third fixed terminal is connected to the second channel, and the fourth fixed terminal is connected to the second generating unit.

[0077] In one embodiment obtaining the rotor angle parameter information includes collecting the current position angle of the rotor by using an angle collection unit accommodates and generating a simulated angle based on the phase information and the angular velocity information of the drive motor by using an angle simulation unit controlling the third movable terminal of the third switch unit to be selectively connected to one of the fifth fixed terminal and the sixth fixed terminal of the third switch unit to select the rotor angle parameter information from the current position angle and the simulated angle including, the angle collection unit is connected to the fifth fixed terminal, and the angle simulation unit is connected to the sixth fixed terminal K33.

[0078] One or two of the first fixed terminal, the third fixed terminal, and the fifth fixed terminal are connected to the corresponding movable terminal.

[0079] In one embodimentWhen the third movable terminal is connected to the sixth non - movable terminal, the first movable terminal is connected to the second non - movable terminal, and the second movable terminal is connected to the fourth non - movable terminal.

[0080] In one embodiment When the third movable terminal is connected to the fifth non - movable terminal, the first movable terminal is connected to the second non - movable terminal, and the second movable terminal is connected to one of the third non - movable terminal and the fourth non - movable terminal, or the first movable terminal is connected to the first non - movable terminal, and the second movable terminal is connected to the fourth non - movable terminal.

[0081] In one embodiment The alternating current is a high - frequency alternating current, and the frequency of the high - frequency alternating current is greater than 300 Hz.

[0082] Regarding the method of the above - mentioned embodiment, the specific manner of performing the operations in each step has already been described in detail in the embodiments regarding the motor drive system. Details are not described here.

[0083] The above has described in detail an optional implementation form of the present disclosure with reference to the accompanying drawings. However, the present disclosure is not limited to the specific details of the above - mentioned implementation form. Within the scope of the technical concept of the present disclosure, a plurality of simple deformation forms of the technical solution of the present disclosure may be created, and these simple deformation forms are within the protection scope of the present disclosure.

[0084] In addition, it should be noted that the specific technical features described in the description of the above - mentioned embodiments may be combined in any suitable manner without contradiction. To avoid unnecessary repetition, various possible combination methods are not described in the present disclosure.

[0085] In addition, various different implementation forms of the present disclosure may also be combined in any manner, and as long as the combination does not deviate from the idea of the present disclosure, the combination should also be regarded as the content disclosed in the present disclosure.

Claims

1. A heating controller (10), a motor controller (20) connected to the heating controller (20), and a drive motor (30) connected to the heating controller (10) and to the motor controller (20), characterized in that the heating controller (10) is configured to detect that the vehicle is in a parked state and, when a heating request is received, generate a plurality of PWM signals and output the plurality of PWM signals to the motor controller (20) to control the motor controller (20) to output an alternating current to the stator of the drive motor (30), as a result of which heat is generated in the stator and rotor of the drive motor (30) in a stationary state and the heat is conducted to the device that issues the heating request, a motor drive system.

2. The system according to claim 1, characterized in that the heating controller (10) is configured to generate the plurality of PWM signals based on a q-axis reference current, a d-axis reference current, a three-phase current of the drive motor (30), and angle parameter information of the rotor.

3. The heating controller, comprises a heating current processing module (S1) configured to generate a q-axis target current and a d-axis target current based on the q-axis reference current and the d-axis reference current, a current collection module (S5) connected to the drive motor (30) and configured to collect the three-phase current, an angle acquisition module (S6) connected to the drive motor (30) and configured to acquire the angle parameter information of the rotor, a current conversion module (S4) individually connected to the current collection module (S5) and the angle acquisition module (S6) and configured to generate a q-axis feedback current and a d-axis feedback current based on the three-phase current and the angle parameter information, and a current adjustment module (S2) individually connected to the heating current processing module (S1) and the current conversion module (S4) and configured to generate a q-axis voltage and a d-axis voltage based on the q-axis target current, the d-axis target current, the q-axis feedback current, and the d-axis feedback current. A waveform processing module (S3) individually connected to the current adjustment module (S2) and the angle acquisition module (S6), and configured to generate a plurality of PWM signals based on the q-axis voltage, the d-axis voltage, and the angle parameter information The system according to claim 2, comprising

4. The alternating current is a high-frequency alternating current, and the heating current processing module (S1) A high-frequency current generation unit (S11) configured to generate a q-axis high-frequency sine wave current based on the q-axis reference current and a preset frequency, and to generate a d-axis high-frequency sine wave current based on the d-axis reference current and the preset frequency A current determination unit (S12) connected to the high-frequency current generation unit (S11), and configured to determine the q-axis target current from the q-axis reference current and the q-axis high-frequency sine wave current, and to determine the d-axis target current from the d-axis reference current and the d-axis sine wave current The system according to claim 3, comprising

5. The high-frequency current generation unit (S11) A first channel (S111) configured to output the q-axis reference current A second channel (S112) configured to output the d-axis reference current A first generation unit (S113) configured to generate the q-axis high-frequency sine wave current based on the q-axis reference current and the preset frequency A second generation unit (S114) configured to generate the d-axis high-frequency sine wave current based on the d-axis reference current and the preset frequency The system according to claim 4, comprising

6. The current determination unit (S12) A first switch unit (K1), comprising A first movable terminal (K11), A first fixed terminal (K12) connected to the first channel (S111), and A second fixed terminal (K13) connected to the first generation unit (S113) A first switch unit (K1) comprising A second switch unit (K2), comprising A second movable terminal (K21), A third fixed terminal (K22) connected to the second channel (S112), and A fourth fixed terminal (K23) connected to the second generation unit (S114) A second switch unit (K2) comprising individually connected to the first movable terminal (K11) and the second movable terminal (K21), and configured to control the first movable terminal (K11) to be selectively connected to one of the first non-movable terminal (K12) and the second non-movable terminal (K13), and select the q-axis target current from the q-axis reference current and the q-axis high-frequency sine-wave current; and control the second movable terminal (K21) to be selectively connected to one of the third non-movable terminal (K22) and the fourth non-movable terminal (K23), and select the d-axis target current from the d-axis reference current and the d-axis sine-wave current, a first control unit The system according to claim 5, comprising

7. The angle acquisition module (S6) A third switch unit (K3) including a third movable terminal (K31), a fifth non-movable terminal (K32), and a sixth non-movable terminal (K33); An angle acquisition unit (S61) connected to the fifth non-movable terminal (K32) and configured to directly collect the current position angle of the rotor; An angle simulation unit (S62) connected to the sixth non-movable terminal (K33) and configured to generate a simulated angle based on the phase information and angular velocity information of the drive motor (30); A second control unit connected to the third movable terminal (K31) and configured to control the third movable terminal (K31) to be selectively connected to one of the fifth non-movable terminal (K32) and the sixth non-movable terminal (K33), and select the angle parameter information of the rotor from the current position angle and the simulated angle The system according to claim 6, wherein one or two of the first non-movable terminal (K12), the third non-movable terminal (K22), and the fifth non-movable terminal (K32) are connected to their corresponding movable terminals.

8. When the third movable terminal (K31) is connected to the sixth non-movable terminal (K33), The first movable terminal (K11) is connected to one of the first non-movable terminal (K12) and the second non-movable terminal (K13), The system according to claim 7, wherein the second movable terminal (K21) is connected to one of the third non-movable terminal (K22) and the fourth non-movable terminal (K23).

9. When the third movable terminal (K31) is connected to the fifth non-movable terminal (K32), the first movable terminal (K11) is connected to the second non-movable terminal (K13), the second movable terminal (K21) is connected to one of the third non-movable terminal (K22) and the fourth non-movable terminal (K23), or the first movable terminal (K11) is connected to the first non-movable terminal (K12), and the second movable terminal (K21) is connected to the fourth non-movable terminal (K23), the system according to claim 7.

10. The system according to any one of claims 1 to 9, wherein the alternating current is a high-frequency alternating current and the frequency of the high-frequency alternating current is greater than 300 Hz.

11. A vehicle comprising the motor drive system according to any one of claims 1 to 10.

12. Detecting that the vehicle is in a parked state and generating a plurality of PWM signals when a heating request is received, generating an alternating current based on the plurality of PWM signals, applying the alternating current to the stator of the drive motor to generate heat in the stator and rotor of the drive motor in a stationary state, and conducting the heat to the device that issues the heating request A method for controlling a motor drive system, comprising:

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