CN209896947U - Motor control circuit - Google Patents
Motor control circuit Download PDFInfo
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- CN209896947U CN209896947U CN201920978170.5U CN201920978170U CN209896947U CN 209896947 U CN209896947 U CN 209896947U CN 201920978170 U CN201920978170 U CN 201920978170U CN 209896947 U CN209896947 U CN 209896947U
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Abstract
The utility model relates to a motor control technology field provides a motor control circuit. The method comprises the following steps: the first rotary transformer sampling circuit is used for sampling a first angle and a first speed of the motor; a first current sampling circuit for sampling a first current output to the motor; the first bus voltage sampling circuit is used for sampling a first voltage of the high-voltage bus; a first control circuit for calculating a first torque of the motor; the second rotary-variable sampling circuit is used for sampling a second angle and a second speed of the motor; the second current sampling circuit is used for sampling a second current output to the motor; the second bus voltage sampling circuit is used for sampling a second voltage of the high-voltage bus; and the second control circuit is used for receiving the first torque, calculating a second torque of the motor, and turning off the motor when the absolute value of the difference value of the first torque and the second torque meets a preset condition. The utility model discloses can promote the reliability of motor control circuit torque control.
Description
[ technical field ] A method for producing a semiconductor device
The utility model relates to a motor control technical field especially relates to a motor control circuit.
[ background of the invention ]
At present, a motor control circuit adopts a control circuit to detect the actual torque of a motor according to a sampling variable, but when the sampling variable is wrong due to the abnormality of the sampling circuit, the control circuit cannot detect and obtain the accurate actual torque of the motor, so that the reliability of the torque control of the motor control circuit is reduced.
[ Utility model ] content
In order to solve the technical problem, an embodiment of the utility model provides a motor control circuit, its reliability that can promote motor control circuit torque control is provided.
In order to solve the technical problem, the embodiment of the utility model provides a motor control circuit is applied to electric automobile, electric automobile includes high voltage battery and motor, motor control circuit includes:
the first rotary transformer sampling circuit is connected with the motor and is used for sampling a first angle and a first speed of the motor;
a first current sampling circuit for sampling a first current output to the motor;
the first bus voltage sampling circuit is connected with the high-voltage battery and is used for sampling a first voltage of a high-voltage bus connected with the high-voltage battery;
the first control circuit is connected with the first rotary transformer sampling circuit, the first current sampling circuit and the first bus voltage sampling circuit and used for calculating first torque of the motor according to the first angle, the first speed, the first current and the first voltage;
the second rotary transformer sampling circuit is connected with the motor and is used for sampling a second angle and a second speed of the motor;
a second current sampling circuit for sampling a second current output to the motor;
the second bus voltage sampling circuit is connected with the high-voltage battery and is used for sampling a second voltage of the high-voltage bus;
and the second control circuit is connected with the first control circuit, the second rotary transformer sampling circuit, the second current sampling circuit and the second bus voltage sampling circuit, is used for receiving the first torque, calculates the second torque of the motor according to the second angle, the second speed, the second current and the second voltage, and sends a first control signal to the first control circuit when the absolute value of the difference value of the first torque and the second torque meets a preset condition so that the first control circuit controls to close the motor.
Furthermore, the motor control circuit further comprises a third control circuit, wherein the third control circuit is in communication connection with the first control circuit and is used for sending a preset torque of the motor to the first control circuit so that the motor works at the preset torque.
Further, the motor control circuit further includes:
the first operational amplifier circuit is connected with the first bus voltage sampling circuit and the first control circuit;
and the second operational amplifier circuit is connected with the second bus voltage sampling circuit and the second control circuit.
Further, the first control circuit includes a first analog-to-digital conversion unit.
Further, the motor control circuit further includes:
the first power supply is connected with the first analog-to-digital conversion unit and used for providing power supply voltage for the first analog-to-digital conversion unit;
the second power supply is connected with the first control circuit and used for providing power supply voltage for the first control circuit;
and the first clock unit is connected with the first control circuit and used for providing a time reference for the first control circuit.
Further, the second control circuit includes a second analog-to-digital conversion unit.
Further, the motor control circuit further includes:
the third power supply is connected with the second analog-to-digital conversion unit and used for providing power supply voltage for the second analog-to-digital conversion unit;
the fourth power supply is connected with the second control circuit and used for providing power supply voltage for the second control circuit;
and the second clock unit is connected with the second control circuit and used for providing a time reference for the second control circuit.
Further, the first current sampling circuit comprises a three-phase hall sensor, and the second current sampling circuit comprises a three-phase hall sensor.
Further, the motor control circuit further includes:
the IGBT driving circuit is connected with the first control circuit;
and the IGBT module is connected with the IGBT driving circuit and the motor.
Further, the motor control circuit further comprises a state detection circuit, and the state detection circuit is connected with the IGBT module and the first control circuit and is used for detecting the working state of the IGBT module.
The utility model has the advantages that: compared with the prior art, the embodiment of the utility model provides a motor control circuit. The first control circuit calculates a first torque of the motor according to a first angle and a first speed of the motor, a first current output to the motor and a first voltage of the high-voltage bus, the second control circuit calculates a second torque of the motor according to a second angle and a second speed of the motor, a second current output to the motor and a second voltage of the high-voltage bus, and then the motor is controlled according to the first torque and the second torque, so that the reliability of torque control of the motor control circuit is improved.
[ description of the drawings ]
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.
Fig. 1 is a schematic structural diagram of an electric vehicle according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a motor control circuit according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a motor control circuit according to another embodiment of the present invention;
fig. 4 is a schematic circuit connection diagram of a first bus voltage sampling circuit according to an embodiment of the present invention;
fig. 5 is a schematic circuit connection diagram of a state detection circuit according to an embodiment of the present invention.
[ detailed description ] embodiments
To facilitate an understanding of the present application, the present application is described in more detail below with reference to the accompanying drawings and detailed description. It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In addition, the technical features mentioned in the different embodiments of the present application described below may be combined with each other as long as they do not conflict with each other.
Please refer to fig. 1, which is a schematic structural diagram of an electric vehicle according to an embodiment of the present invention. As shown in fig. 1, the electric vehicle 400 includes a motor control circuit 100, a high-voltage battery 200, and a motor 300.
The high-voltage battery 200 is connected to the motor control circuit 100, the high-voltage battery 200 is a power source for providing power to the electric vehicle 400, and the rated voltage of the high-voltage battery 200 is generally 100V or 400V.
The motor 300 is connected to the motor control circuit 100, wherein the motor 300 may be divided into a dc motor and an ac motor according to the type of a working power source, and the motor 300 is divided into a dc motor, an asynchronous motor and a synchronous motor according to the structure and the working principle. The direct current motor can be divided into a brushless direct current motor and a brush direct current motor according to the structure and the working principle, and the brush direct current motor can be divided into a permanent magnet direct current motor and an electromagnetic direct current motor. Further, the permanent magnet dc motor can be divided into a rare earth permanent magnet dc motor, a ferrite permanent magnet dc motor and an alnico permanent magnet dc motor, and the electromagnetic dc motor can be divided into a series excitation dc motor, a parallel excitation dc motor, a separately excitation dc motor and a compound excitation dc motor. The ac motor may be classified into a unidirectional motor and a three-phase motor. In the present embodiment, the motor 300 is a permanent magnet synchronous motor. The permanent magnet synchronous motor has the advantages of a brushless structure of an alternating current motor, reliability in operation and the like, has the advantage of good speed regulation performance of a direct current motor, does not need an excitation winding, and can achieve small volume and high control efficiency.
The motor 300 is used for converting the electric energy provided by the high voltage battery 200 into mechanical energy, and driving wheels and other moving devices through a transmission or directly. The motor 300 may be used to control the motor 300 to start, accelerate, run, decelerate, stop, etc. according to the control command of the motor control circuit 100. In this embodiment, when the first control circuit and the second control circuit of the motor control circuit 100 detect that there is a difference in the torque of the motor 300, and the difference satisfies a preset condition, the motor 300 is controlled to be turned off, so that the reliability of torque control is improved, and the safety of the circuit is further improved.
For solving the problem that single control circuit control motor torque reliability is low, the utility model provides an electric automobile, first angle and the first speed according to the motor through first control circuit, export the first electric current of motor and the first voltage of high-voltage bus, the first torque of calculation motor, second control circuit is according to the second angle and the second speed of motor, export the second electric current of motor and the second voltage of high-voltage bus, the second torque of calculation motor, again according to first torque and second torque, the control motor, thereby the reliability of motor control circuit torque control has been promoted.
Please refer to fig. 2, which is a schematic structural diagram of a motor control circuit according to an embodiment of the present invention. As shown in fig. 2, the motor control circuit 100 includes a first resolver sampling circuit 10, a first current sampling circuit 20, a first bus voltage sampling circuit 30, a first control circuit 40, a second resolver sampling circuit 50, a second current sampling circuit 60, a second bus voltage sampling circuit 70, and a second control circuit 80.
The first rotary transformer sampling circuit 10 is connected to the motor 300 and is configured to sample a first angle and a first speed of the motor 300.
The first control circuit 40 outputs a PWM signal, the PWM signal is amplified to generate a sine wave to provide an excitation source, the excitation source acts on the resolver of the motor 300 and feeds back resolver sin and cos signals to the first resolver sampling circuit 10, the first resolver sampling circuit 10 receives the resolver sin and cos signals and samples a first angle and a first speed of the motor 300, and the first angle and the first speed are processed and then sent to the first control circuit 40.
The first current sampling circuit 20 is configured to sample a first current output to the motor 300.
In the present embodiment, the first current sampling circuit 20 includes a three-phase hall sensor. The three-phase hall sensor can adopt an MLX91208 integrated chip, and the MLX91208 integrated chip can be used for sampling U, V, W phase current output to the motor 300 and current of the high-voltage bus connected with the high-voltage battery 200. In some embodiments, the number of the hall sensors is 3, and the 3 hall sensors are arranged at intervals of 120 degrees in pairs.
The first bus voltage sampling circuit 30 is connected to the high voltage battery 200, and is configured to sample a first voltage of a high voltage bus connected to the high voltage battery 200.
As shown in fig. 4, in the present embodiment, the first bus voltage sampling circuit 30 includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a first controller U1, a ninth resistor R9, and a fifth capacitor C5.
One end of the first resistor R1 is configured to receive a voltage of the high-voltage bus, the other end of the first resistor R1 is connected to one end of the second resistor R2, the other end of the second resistor R2 is connected to one end of the third resistor R3, the other end of the third resistor R3 is connected to one end of the fourth resistor R4, the other end of the fourth resistor R4 is connected to one end of the fifth resistor R5, the other end of the fifth resistor R5 is connected to one end of the sixth resistor R6 and one end of the seventh resistor R7, the other end of the sixth resistor R6 is grounded, the other end of the seventh resistor R7 is connected to one end of the first capacitor C1, one end of the second capacitor C2 and the first controller U1, one end of the eighth resistor R8 is grounded, and the other end of the eighth resistor R8 is connected to the other end of the first capacitor C1, One end of the third capacitor C3 is connected to the first controller U1, one end of the ninth resistor R9 is grounded, the other end of the third capacitor C3 is grounded, one end of the fourth capacitor C4 is connected to the first controller U1, the other end of the fourth capacitor C4 is grounded, one end of the fifth capacitor C5 is connected to one end of the fifth capacitor C5 and the first controller U1, the other end of the fifth capacitor C5 is grounded, and the first controller U1 is further configured to output the first voltage.
The first control circuit 40 is connected to the first rotation sampling circuit 10, the first current sampling circuit 20, and the first bus voltage sampling circuit 30, and is configured to calculate a first torque of the motor 300 according to the first angle, the first speed, the first current, and the first voltage.
In this embodiment, the first control circuit 40 may adopt a C2000 or an FPGA (Field-Programmable Gate Array). The C2000 may be a TMS320F28069PZT ic, the FPGA may be a 10M08SAU169A7G ic, and the TMS320F28069PZT ic or the 10M08SAU169A7G ic is configured to calculate the first torque of the motor 300 according to the first angle, the first speed, the first current, and the first voltage.
Further, the first control circuit 40 includes a first analog-to-digital conversion unit 401. The first analog-to-digital conversion unit 401 is configured to convert analog signals such as the first angle, the first speed, the first current, and the first voltage into digital signals that can be identified and processed by the first control circuit 40.
The second rotary transformer sampling circuit 50 is connected to the motor 300 and is configured to sample a second angle and a second speed of the motor 300.
The second control circuit 80 outputs a PWM signal, the PWM signal is amplified to generate a sine wave to provide an excitation source, the excitation source acts on the resolver of the motor 300 and feeds back resolver sin and cos signals to the second resolver sampling circuit 50, the second resolver sampling circuit 50 receives the resolver sin and cos signals and samples a second angle and a second speed of the motor 300, and the second angle and the second speed are processed and then sent to the second control circuit 80.
The second current sampling circuit 60 is configured to sample a second current output to the motor 300.
In the present embodiment, the second current sampling circuit 60 includes a three-phase hall sensor.
The second bus voltage sampling circuit 70 is connected to the high voltage battery 200, and is configured to sample a second voltage of the high voltage bus.
The second control circuit 80 is connected to the first control circuit 40, the second rotation transformer sampling circuit 50, the second current sampling circuit 60, and the second bus voltage sampling circuit 70, and configured to receive the first torque, calculate a second torque of the motor 300 according to the second angle, the second speed, the second current, and the second voltage, and send a first control signal to the first control circuit 40 when an absolute value of a difference between the first torque and the second torque satisfies a preset condition, so that the first control circuit 40 controls to close the motor 300.
In this embodiment, the second control circuit 80 satisfies ASIL D class for vehicle, and the third control circuit 60 may be a TMS570LS1227 integrated chip, a TC275 integrated chip, or the like.
Further, the second control circuit 80 includes a second analog-to-digital conversion unit 801. The second analog-to-digital conversion unit 801 is configured to convert analog signals such as the second angle, the second speed, the second current, and the second voltage into digital signals that can be identified and processed by the second control circuit 80.
It should be noted that the preset condition may be that an absolute value of a difference between the first torque and the second torque is greater than a preset first threshold, or may be that the absolute value of the difference between the first torque and the second torque is greater than a preset second threshold within a preset time. When the absolute value of the difference between the first torque and the second torque satisfies the preset condition, it is stated that the torque detected by the first control circuit 40 and the torque detected by the second control circuit 80 have a large difference, so that the actual torque of the motor 300 cannot be determined, and further, whether the motor 300 operates at the preset torque cannot be determined. It is understood that the preset condition can be set according to actual requirements.
Please refer to fig. 3, which is a schematic structural diagram of a motor control circuit according to another embodiment of the present invention. As shown in fig. 3, the motor control circuit 500 includes, in addition to the circuit modules illustrated in the motor control circuit 100, a third control circuit 511, a first operational amplifier circuit 512, a second operational amplifier circuit 513, a first power supply 514, a second power supply 515, a first clock unit 516, a third power supply 517, a fourth power supply 518, a second clock unit 519, an IGBT driving circuit 520, an IGBT module 521, and a state detection circuit 522.
The third control circuit 511 is in communication connection with the first control circuit 40, and is configured to send a preset torque of the motor 300 to the first control circuit 40, so that the motor 300 operates at the preset torque.
The first operational amplifier circuit 512 is connected to the first bus voltage sampling circuit 30 and the first control circuit 40.
The second operational amplifier circuit 513 is connected to the second bus voltage sampling circuit 70 and the second control circuit 80.
The first power supply 514 is connected to the first analog-to-digital conversion unit 401, and is configured to provide a power supply voltage for the first analog-to-digital conversion unit 401.
The second power supply 515 is connected to the first control circuit 40, and is configured to provide a power supply voltage for the first control circuit 40.
The first clock unit 516 is connected to the first control circuit 40, and is configured to provide a time reference for the first control circuit 40.
The third power supply 517 is connected to the second analog-to-digital conversion unit 801, and is configured to provide a power supply voltage for the second analog-to-digital conversion unit 801.
The fourth power supply 518 is connected to the second control circuit 80, and is configured to provide a power supply voltage for the second control circuit 80.
The second clock unit 519 is connected to the second control circuit 80 for providing a time reference for the second control circuit 80.
The IGBT driving circuit 520 is connected to the first control circuit 40 and the second control circuit 80.
Under normal conditions, when the absolute value of the difference between the first torque and the second torque meets a preset condition, the second control circuit 80 sends a first control signal to the first control circuit 40, so that the first control circuit 40 outputs an SVPWM signal, and the IGBT drive circuit 520 receives the SVPWM signal and turns off the IGBT drive circuit 520 according to the SVPWM signal, so as to turn off the IGBT module 521. If the first control circuit 40 fails, for example, the first control circuit 40 is damaged, and the program is wrong, when the second control circuit 80 detects that the first control circuit 40 fails and the absolute value of the difference between the first torque and the second torque meets a preset condition, the second control circuit 80 sends a second control signal to the IGBT driving circuit 520 to turn off the IGBT driving circuit 520, so as to turn off the IGBT module 521. The second control circuit 80 is added to detect the working state of the first control circuit 40, so that the redundant control of the IGBT drive circuit 520 is realized, and the reliability of motor torque control is further improved. The IGBT module 521 is connected to the IGBT driving circuit 520 and the motor 300.
The state detection circuit 522 is connected to the IGBT module 520 and the first control circuit 40, and is configured to detect an operating state of the IGBT module 520.
As shown in fig. 5, for example, a source voltage corresponding to a certain IGBT of the U-phase IGBT module 520 is input, the source voltage is processed, the processed source voltage is compared with a preset voltage, if the processed source voltage is greater than the preset voltage, the comparator circuit outputs a high level signal, if the processed source voltage is less than the preset voltage, the comparator circuit outputs a low level signal, the high level signal or the low level signal output by the comparator circuit is input to the isolation circuit, the signal after the isolation processing is input to the first control circuit 40, and the first control circuit 40 determines an operating state of the certain IGBT of the U-phase IGBT module 520.
To sum up, the motor 300 operates according to the preset torque sent by the third control circuit 511, the first rotary transformer sampling circuit 10 collects the first angle and the first speed of the motor 300, the first current sampling circuit 20 samples the first current output to the motor 300, the first bus voltage sampling circuit 300 samples the first voltage of the high-voltage bus, the first analog-to-digital conversion unit 401 receives the processed first angle, the processed first speed, the processed first current and the processed first voltage, and the first control circuit 40 calculates the first torque of the motor 300; the second rotary transformer sampling circuit 50 samples a second angle and a second speed of the motor 300, the second current sampling circuit 60 samples a second current output to the motor 300, the second bus voltage sampling circuit 70 samples a second voltage of a high voltage bus, the second analog-to-digital conversion unit 801 receives the processed second angle, the second speed, the second current and the second voltage, the second control circuit 80 calculates a second torque of the motor 300, when an absolute value of a difference value between the first torque and the second torque satisfies a preset condition, the second control circuit 80 sends a first control signal to the first control circuit 40 to make the first control circuit 40 output a SVPWM signal, the IGBT drive circuit 520 receives the SVPWM signal and turns off the IGBT drive circuit 520 according to the SVPWM signal, thereby turning off the IGBT module 521 to stop the motor 300.
For example, the third control circuit 511 specifies a predetermined torque of 10Nm, and normally, the first current sampled and sent to the first control circuit 40 is 10A, the first voltage is 1V, and the first torque is calculated as 10Nm in combination with other variables. If the first current sampling circuit 20 makes an error such that the first current is 10A corresponding to the first voltage of 1V and the first current is 20A corresponding to the first voltage of 1V, although the first torque calculated by the first control circuit 40 is still 10Nm, the current actually output to the motor 300 is 20A and the torque of the motor 300 is 60 Nm. By adding the second control circuit 80, when the second current sampling circuit 60 detects that the second current is 20A, the second voltage received by the second control circuit 80 is 2V, the first torque calculated by the second control circuit 80 is 70Nm, the first control circuit 40 sends the first torque 10Nm to the second control circuit 80 by serial port transmission, the absolute value of the difference between the first torque and the second torque is calculated to be 70Nm-10 Nm-60 Nm, and if 60Nm exceeds 200ms, the second control circuit 80 sends the first control signal to the first control circuit 40, so that the first control circuit 40 controls to turn off the motor 300.
The utility model provides a motor control circuit, first angle and the first speed according to the motor through first control circuit, export to the first electric current of motor and the first voltage of high-voltage bus, the first torque of calculation motor, second control circuit is according to the second angle and the second speed of motor, export to the second electric current of motor and the second voltage of high-voltage bus, the second torque of calculation motor, again according to first torque and second torque, the control motor, thereby the reliability of motor control circuit torque control has been promoted.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; within the idea of the invention, also technical features in the above embodiments or in different embodiments can be combined, steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (10)
1. The utility model provides a motor control circuit, is applied to electric automobile, electric automobile includes high voltage battery and motor, its characterized in that, motor control circuit includes:
the first rotary transformer sampling circuit is connected with the motor and is used for sampling a first angle and a first speed of the motor;
a first current sampling circuit for sampling a first current output to the motor;
the first bus voltage sampling circuit is connected with the high-voltage battery and is used for sampling a first voltage of a high-voltage bus connected with the high-voltage battery;
the first control circuit is connected with the first rotary transformer sampling circuit, the first current sampling circuit and the first bus voltage sampling circuit and used for calculating first torque of the motor according to the first angle, the first speed, the first current and the first voltage;
the second rotary transformer sampling circuit is connected with the motor and is used for sampling a second angle and a second speed of the motor;
a second current sampling circuit for sampling a second current output to the motor;
the second bus voltage sampling circuit is connected with the high-voltage battery and is used for sampling a second voltage of the high-voltage bus;
and the second control circuit is connected with the first control circuit, the second rotary transformer sampling circuit, the second current sampling circuit and the second bus voltage sampling circuit, is used for receiving the first torque, calculates the second torque of the motor according to the second angle, the second speed, the second current and the second voltage, and sends a first control signal to the first control circuit when the absolute value of the difference value of the first torque and the second torque meets a preset condition so that the first control circuit controls to close the motor.
2. The motor control circuit of claim 1 further comprising a third control circuit in communication with the first control circuit for sending a predetermined torque of the motor to the first control circuit to operate the motor at the predetermined torque.
3. The motor control circuit of claim 2, further comprising:
the first operational amplifier circuit is connected with the first bus voltage sampling circuit and the first control circuit;
and the second operational amplifier circuit is connected with the second bus voltage sampling circuit and the second control circuit.
4. A motor control circuit according to any of claims 1-3, characterised in that the first control circuit comprises a first analogue-to-digital conversion unit.
5. The motor control circuit of claim 4, further comprising:
the first power supply is connected with the first analog-to-digital conversion unit and used for providing power supply voltage for the first analog-to-digital conversion unit;
the second power supply is connected with the first control circuit and used for providing power supply voltage for the first control circuit;
and the first clock unit is connected with the first control circuit and used for providing a time reference for the first control circuit.
6. A motor control circuit according to any of claims 1-3, characterised in that the second control circuit comprises a second analogue-to-digital conversion unit.
7. The motor control circuit of claim 6, further comprising:
the third power supply is connected with the second analog-to-digital conversion unit and used for providing power supply voltage for the second analog-to-digital conversion unit;
the fourth power supply is connected with the second control circuit and used for providing power supply voltage for the second control circuit;
and the second clock unit is connected with the second control circuit and used for providing a time reference for the second control circuit.
8. The motor control circuit of claim 1 wherein the first current sampling circuit comprises a three-phase hall sensor and the second current sampling circuit comprises a three-phase hall sensor.
9. The motor control circuit of claim 1, further comprising:
the IGBT driving circuit is connected with the first control circuit;
and the IGBT module is connected with the IGBT driving circuit and the motor.
10. The motor control circuit of claim 9 further comprising a state detection circuit connected to the IGBT module and the first control circuit for detecting an operating state of the IGBT module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920978170.5U CN209896947U (en) | 2019-06-24 | 2019-06-24 | Motor control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920978170.5U CN209896947U (en) | 2019-06-24 | 2019-06-24 | Motor control circuit |
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| CN209896947U true CN209896947U (en) | 2020-01-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113156194A (en) * | 2021-04-23 | 2021-07-23 | 精进电动科技股份有限公司 | Bus voltage sampling circuit of motor controller and motor controller |
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2019
- 2019-06-24 CN CN201920978170.5U patent/CN209896947U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113156194A (en) * | 2021-04-23 | 2021-07-23 | 精进电动科技股份有限公司 | Bus voltage sampling circuit of motor controller and motor controller |
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