CN116054684A - Motor control circuit and method and motor driving system - Google Patents

Motor control circuit and method and motor driving system Download PDF

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Publication number
CN116054684A
CN116054684A CN202211734533.3A CN202211734533A CN116054684A CN 116054684 A CN116054684 A CN 116054684A CN 202211734533 A CN202211734533 A CN 202211734533A CN 116054684 A CN116054684 A CN 116054684A
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CN
China
Prior art keywords
circuit
power supply
control
digital
motor
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Pending
Application number
CN202211734533.3A
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Chinese (zh)
Inventor
周荣晖
苏博仕
赵宏力
李明明
史文凡
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Wolong Electric Shanghai Central Research Institute Co ltd
Zhejiang Longchuang Motor Technology Innovation Co ltd
Wolong Electric Drive Group Co Ltd
Original Assignee
Wolong Electric Shanghai Central Research Institute Co ltd
Zhejiang Longchuang Motor Technology Innovation Co ltd
Wolong Electric Group Co Ltd
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Application filed by Wolong Electric Shanghai Central Research Institute Co ltd, Zhejiang Longchuang Motor Technology Innovation Co ltd, Wolong Electric Group Co Ltd filed Critical Wolong Electric Shanghai Central Research Institute Co ltd
Priority to CN202211734533.3A priority Critical patent/CN116054684A/en
Publication of CN116054684A publication Critical patent/CN116054684A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B9/00—Safety arrangements
    • G05B9/02—Safety arrangements electric
    • G05B9/03—Safety arrangements electric with multiple-channel loop, i.e. redundant control systems
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/068—Electronic means for switching from one power supply to another power supply, e.g. to avoid parallel connection

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Ac Motors In General (AREA)

Abstract

The application provides a motor control circuit and method, motor drive system, relates to control circuit technical field, and this circuit includes: the power supply circuit comprises a first power supply channel, a second power supply channel, a power supply selection logic circuit, a first voltage conversion circuit, a digital control chip, a second voltage conversion circuit, a digital logic chip and a PWM conditioning circuit; the first voltage conversion circuit is connected with the digital control chip, and the digital control chip is respectively connected with the digital logic chip and the PWM conditioning circuit; the second voltage conversion circuit is connected with the digital logic chip, and the digital logic chip is connected with the PWM conditioning circuit. The invention can drive the motor through the control circuit path based on the digital control chip or the control circuit path based on the digital logic chip, ensures the continuous control of the motor by the motor control circuit, reduces the failure rate of the control system and improves the reliability of the driving system.

Description

Motor control circuit and method and motor driving system
Technical Field
The present invention relates to the field of control circuits, and in particular, to a motor control circuit, a motor control method, and a motor driving system.
Background
This section is intended to provide a background or context to the embodiments of the invention that are recited in the claims. The description herein is not admitted to be prior art by inclusion in this section.
Electric aircraft place high demands on the design of the motor drive system in terms of reliability. In order to improve the reliability of a motor driving system, a single control channel is constructed by adopting a high-reliability device in the existing scheme, and the failure rate of the system is 10-9 times as required by some applications of an electric airplane, and the reliability requirement of the single channel design on each device is extremely high; the existing scheme II adopts a plurality of control boards to construct a redundant control channel, the requirement of increasing extra volume space and weight is brought by adopting the plurality of control boards, and the problem of common cause failure can be caused by simply adopting the plurality of control boards, namely, the possibility of simultaneous failure can be also caused under the same application condition of the same environment. At present, a more perfect solution is needed to be put forward for the application of a motor control circuit with high reliability, low cost, small space volume requirement and light weight requirement in the field of electric motor aircraft electric drive systems.
Disclosure of Invention
The application provides a motor control circuit and a motor driving system, wherein the motor control circuit comprises redundant circuits with different physical mechanisms, so that the failure rate of the control circuit of a controller can be greatly reduced, and the reliability of the whole driving system is improved.
According to an aspect of the present application, there is provided a motor control circuit including: the power supply circuit comprises a first power supply channel, a second power supply channel, a power supply selection logic circuit, a first voltage conversion circuit, a digital control chip, a second voltage conversion circuit, a digital logic chip and a PWM conditioning circuit; the first voltage conversion circuit is connected with the digital control chip, and the digital control chip is respectively connected with the digital logic chip and the PWM conditioning circuit; the second voltage conversion circuit is connected with the digital logic chip, and the digital logic chip is connected with the PWM conditioning circuit; the power supply selection logic circuit is used for controlling the first power supply channel to supply power to the first voltage conversion circuit or the second voltage conversion circuit; the power supply selection logic circuit is further configured to control the second power supply channel to supply power to the first voltage conversion circuit or the second voltage conversion circuit.
According to another aspect of the present application, there is provided a motor control method applied to the motor control circuit described above, the method including: acquiring a motor control feedback signal; the motor control feedback signal is a first control feedback signal or a second control feedback signal; generating a motor drive signal using the motor control circuit; and controlling a motor by using the motor driving signal.
According to another aspect of the present application, there is provided a motor drive system, wherein the motor drive system comprises a motor and the motor control circuit described above.
In an embodiment of the present application, a motor control circuit includes: the power supply circuit comprises a first power supply channel, a second power supply channel, a power supply selection logic circuit, a first voltage conversion circuit, a digital control chip, a second voltage conversion circuit, a digital logic chip and a PWM conditioning circuit; the power supply selection logic circuit is used for controlling the first power supply channel to supply power to the first voltage conversion circuit or the second voltage conversion circuit; the power supply selection logic circuit is further configured to control the second power supply channel to supply power to the first voltage conversion circuit or the second voltage conversion circuit; the first voltage conversion circuit is connected with the digital control chip, and the digital control chip is respectively connected with the digital logic chip and the PWM conditioning circuit; the second voltage conversion circuit is connected with the digital logic chip, and the digital logic chip is connected with the PWM conditioning circuit. In the embodiment of the invention, the power supply selection logic circuit can control and switch the first power supply channel or the second power supply channel to supply power for the first voltage conversion circuit and/or the second voltage conversion circuit when the power supply fails, so that the circuit failure caused by the occurrence of the problem of the power supply channel is avoided. In addition, the first power supply channel, the first voltage conversion circuit, the digital control chip and the PWM conditioning circuit form a control circuit path based on the digital control chip; the second power supply channel, the second voltage conversion circuit, the digital logic chip and the PWM conditioning circuit form a control circuit path based on the digital logic chip.
Drawings
Further details, features and advantages of the present application are disclosed in the following description of exemplary embodiments, with reference to the following drawings, wherein:
fig. 1 shows a schematic diagram of a motor control circuit according to an exemplary embodiment of the present application;
FIG. 2 shows a schematic diagram of a motor control circuit configuration;
FIG. 3 illustrates a motor control circuit block diagram according to an exemplary embodiment of the present application;
FIG. 4 illustrates a block diagram of a motor control circuit in a fault-free condition according to an exemplary embodiment of the present application;
FIG. 5 illustrates a first block diagram of motor control circuitry in the event of a fault condition according to an exemplary embodiment of the present application;
fig. 6 shows a second configuration diagram of a motor control circuit in the case of a failure according to an exemplary embodiment of the present application.
Detailed Description
Embodiments of the present application will be described in more detail below with reference to the accompanying drawings. While certain embodiments of the present application are shown in the drawings, it is to be understood that the present application may be embodied in various forms and should not be construed as limited to the embodiments set forth herein, but rather are provided to provide a more thorough and complete understanding of the present application. It should be understood that the drawings and examples of the present application are for illustrative purposes only and are not intended to limit the scope of the present application.
It should be understood that the various steps recited in the method embodiments of the present application may be performed in a different order and/or performed in parallel. Furthermore, method embodiments may include additional steps and/or omit performing the illustrated steps. The scope of the present application is not limited in this respect.
The term "including" and variations thereof as used herein are intended to be open-ended, i.e., including, but not limited to. The term "based on" is based at least in part on. The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments. Related definitions of other terms will be given in the description below. It should be noted that the terms "first," "second," and the like herein are merely used for distinguishing between different devices, modules, or units and not for limiting the order or interdependence of the functions performed by such devices, modules, or units.
It should be noted that references to "one" or "a plurality" in this application are intended to be illustrative rather than limiting, and those of ordinary skill in the art will appreciate that "one or more" is intended to be interpreted as "one or more" unless the context clearly indicates otherwise.
The names of messages or information interacted between the various devices in the embodiments of the present application are for illustrative purposes only and are not intended to limit the scope of such messages or information.
Typical high speed motor control circuit designs may employ the circuit shown in fig. 2, from left to right: controlling low-voltage power supply (24V or 28V), generating 3.3V or 5V through a voltage conversion circuit, supplying power to an MCU (Microcontroller Unit, a micro control unit)/DSP (Digital Signal Processing, a digital signal processor), an FPGA (Field Programmable Gate Array, a field programmable gate array)/an ASIC (Application Specific Integrated Circuit, an application specific integrated circuit) chip, acquiring a circuit, voltage and speed signals acquired by high-speed analog-to-digital conversion by the FPGA/ASIC circuit, and transmitting the circuit, the voltage and the speed signals to the MCU/DSP to execute control calculation; the control modulation wave calculated in the MCU/DSP is transmitted to the FPGA/ASIC to generate PWM (Pulse Width Modulation ) high-low level signals, and PWM driving signals meeting the driving level of the power unit are generated through a PWM conditioning circuit. The MCU/DSP finishes the control logic calculation and communication functions, and the FPGA/ASIC chip finishes the functions of data acquisition and PWM generation in parallel, so that the functions of high-speed signal acquisition and calculation are realized. The circuit of fig. 2 works well without faults in the circuit, and a certain degree of high reliability index can be achieved by selecting devices with low failure rate.
On the basis of the circuit, the motor control circuit with high reliability, low cost and small space volume requirement is applied to the field of motor driving systems of electric aircrafts, and the motor control circuit, the motor control method and the motor driving system are provided.
According to an aspect of an embodiment of the present invention, there is provided a motor control circuit, fig. 1 is a schematic diagram of a motor control circuit structure provided in the embodiment of the present invention, and as shown in fig. 1, the circuit includes the following structures:
the power supply circuit comprises a first power supply channel, a second power supply channel, a power supply selection logic circuit, a first voltage conversion circuit, a digital control chip, a second voltage conversion circuit, a digital logic chip and a PWM conditioning circuit; the first voltage conversion circuit is connected with the digital control chip, and the digital control chip is respectively connected with the digital logic chip and the PWM conditioning circuit; the second voltage conversion circuit is connected with the digital logic chip, and the digital logic chip is connected with the PWM conditioning circuit; the power supply selection logic circuit is used for controlling the first power supply channel to supply power to the first voltage conversion circuit or the second voltage conversion circuit; the power supply selection logic circuit is further configured to control the second power supply channel to supply power to the first voltage conversion circuit or the second voltage conversion circuit.
In the embodiment of the invention, the first power supply channel may be a low-voltage power supply channel, and the second power supply channel may also be a low-voltage power supply channel. The first power supply channel and the second power supply channel are connected with the power supply selection logic circuit, and the power supply selection logic circuit can be used for selectively adopting the first power supply channel or the second power supply channel to supply power to the motor control circuit. When a problem occurs in one power supply channel, a second channel is immediately selected to supply power for the control circuit.
The first voltage conversion circuit is connected with the digital control chip and can be used for converting the obtained voltage into a voltage level value required by the digital control chip to supply power to the digital control chip; the second voltage conversion circuit is connected with the digital logic chip and can be used for converting the obtained voltage into a voltage level value required by the digital logic chip and supplying power to the digital logic chip.
The digital control chip is respectively connected with the digital logic chip and the PWM conditioning circuit, so that signals are sent to the digital logic chip or the PWM conditioning circuit when a passage is formed, and the digital logic chip is connected with the PWM conditioning circuit, so that signals are sent to the PWM conditioning circuit when the passage is formed. The PWM conditioning circuit is used for generating a driving signal by using the received signal, and further controlling the operation of the motor by using the driving signal.
The first power supply channel, the first voltage conversion circuit, the digital control chip and the PWM conditioning circuit are control circuit paths based on the digital control chip; the second power supply channel, the second voltage conversion circuit, the digital logic chip and the PWM conditioning circuit are control circuit paths based on the digital logic chip.
When the control circuit based on the digital logic chip fails, the first power supply channel, the first voltage conversion circuit, the digital control chip and the PWM conditioning circuit are the control circuit based on the digital control chip, and the operation of the motor is controlled; when the control circuit access based on the digital control chip fails, the second power supply channel, the second voltage conversion circuit, the digital logic chip and the PWM conditioning circuit are the control circuit access based on the digital logic chip, and the operation of the motor is controlled; under the condition that all the devices are normal, the first power supply channel and the second power supply channel are controlled by the power supply selection logic circuit to supply power to all the devices in the whole motor control circuit, and all the devices in the whole motor control circuit form the motor control circuit to control the motor to continuously run.
In an embodiment of the present application, a motor control circuit includes: the power supply circuit comprises a first power supply channel, a second power supply channel, a power supply selection logic circuit, a first voltage conversion circuit, a digital control chip, a second voltage conversion circuit, a digital logic chip and a PWM conditioning circuit; the power supply selection logic circuit is used for controlling the first power supply channel to supply power to the first voltage conversion circuit or the second voltage conversion circuit; the power supply selection logic circuit is further configured to control the second power supply channel to supply power to the first voltage conversion circuit or the second voltage conversion circuit; the first voltage conversion circuit is connected with the digital control chip, and the digital control chip is respectively connected with the digital logic chip and the PWM conditioning circuit; the second voltage conversion circuit is connected with the digital logic chip, and the digital logic chip is connected with the PWM conditioning circuit. In the embodiment of the invention, the power supply selection logic circuit can control and switch the first power supply channel or the second power supply channel to supply power for the first voltage conversion circuit and/or the second voltage conversion circuit when the power supply fails, so that the circuit failure caused by the occurrence of the problem of the power supply channel is avoided. In addition, the first power supply channel, the first voltage conversion circuit, the digital control chip and the PWM conditioning circuit form a control circuit path based on the digital control chip; the second power supply channel, the second voltage conversion circuit, the digital logic chip and the PWM conditioning circuit form a control circuit path based on the digital logic chip.
In an alternative embodiment, when the first power supply channel supplies power to the first voltage conversion circuit through the power supply selection logic circuit and the second power supply channel supplies power to the second voltage conversion circuit through the power supply selection logic circuit, the digital logic chip is configured to acquire a first control feedback signal by using an analog-to-digital conversion circuit, and send the first control feedback signal to the digital control chip; the digital control chip is used for receiving the first control feedback signal, calculating according to the first control feedback signal to generate a control modulation wave, and transmitting the control modulation wave to the digital logic chip; the digital logic chip is further used for generating a PWM high-low level signal according to the control modulation wave and sending the PWM high-low level signal to the PWM conditioning circuit; the PWM conditioning circuit is used for generating a motor driving signal according to the PWM high-low level signal.
In the embodiment of the invention, the digital logic chip can acquire the first control feedback signal from the sensor by utilizing the high-speed analog-to-digital conversion circuit, and optionally, the first control feedback signal is one or more of the following signals: a current signal, a voltage signal, a speed signal, and a temperature signal. Optionally, the digital control chip is a micro control unit or a digital signal processor; the digital logic chip is a field programmable gate array or an application specific integrated circuit.
The circuit configuration may be implemented according to the motor control circuit configuration shown in fig. 3. The dual external low-voltage power supply (24V or 28V) is adopted, a conventional working circuit path is a low-voltage power supply-voltage conversion circuit-MCU/DSP-FPGA/ASIC-PWM conditioning circuit-output driving signal, when a circuit on the path breaks down, a redundant circuit path is selected according to a specific fault circuit, and the redundant circuit path comprises: (1) digital logic chip based control circuit path: the low-voltage power supply-voltage conversion circuit-FPGA/ASIC-PWM conditioning circuit-driving signal; or (2) a control circuit path based on a digital control chip: the low-voltage power supply-voltage conversion circuit-MCU/DSP-PWM conditioning circuit-driving signal; this provides a redundant motor control circuit design based on different physical mechanisms. The circuit is also provided with a high-speed analog-to-digital conversion circuit, and is suitable for a high-reliability high-speed motor control circuit.
In the embodiment of the invention, based on the circuit shown in fig. 3, in a normal working mode, referring to a motor control circuit structure diagram under the fault-free condition shown in fig. 4, an independent power supply system is provided for MCU/DSP, FPGA/ASIC chips: the voltage is converted into 3.3V by the voltage conversion circuit 1 by using the control low-voltage power supply channel 1, and power is supplied to the MCU/DSP chip; the low-voltage power supply channel 2 is controlled, and the voltage is converted into 3.3V/5V by the voltage conversion circuit 2 to supply power for the FPGA/ASIC chip. The FPGA/ASIC circuit obtains the circuit, voltage, speed and temperature signals acquired by high-speed analog-to-digital conversion, and transmits the signals to the MCU/DSP chip to execute control calculation; the control modulation wave calculated in the MCU/DSP chip is transmitted to the FPGA/ASIC chip to generate PWM high-low level signals, and PWM driving signals meeting the driving level of the power unit are generated through a PWM conditioning circuit. The MCU/DSP chip is used for completing control logic calculation and communication functions, and the FPGA/ASIC chip is used for completing data acquisition and PWM generation in parallel. In this mode, a separate power supply circuit for the FPGA/ASIC is provided.
In order to avoid failure of the motor control circuit caused by power supply failure, the power supply selection logic circuit detects power supply levels of the first voltage conversion circuit and the second voltage conversion circuit, and if one power supply channel fails, the other power supply channel is controlled to supply power for the first voltage conversion circuit and/or the second voltage conversion circuit. Thus, in an alternative embodiment, the power supply selection logic is configured to: detecting power supply levels of a first voltage conversion circuit and a second voltage conversion circuit, and judging the running states of the first power supply channel and the second power supply channel according to the power supply levels; if the first power supply channel fails, the second power supply channel is controlled to replace the first power supply channel; and if the second power supply channel fails, controlling the first power supply channel to replace the second power supply channel.
In the embodiment of the invention, a power supply selection logic circuit detects power supply levels of a first voltage conversion circuit and a second voltage conversion circuit in real time, judges the running states of a first power supply channel and a second power supply channel according to detection results, and controls the second power supply channel to replace the first power supply channel if the running states are faults of the first power supply channel so as to realize switching of the power supply channels; and if the running state is that the second power supply channel fails, the first power supply channel is controlled to replace the second power supply channel, so that the switching of the power supply channels is realized.
In an alternative embodiment, when a control circuit path formed by the second power supply channel, the second voltage conversion circuit, the digital logic chip and the PWM conditioning circuit and based on the digital logic chip fails, the digital control chip is configured to obtain a second control feedback signal, calculate according to the second control feedback signal to generate a PWM high-low level signal, and send the PWM high-low level signal to the PWM conditioning circuit; the PWM conditioning circuit is used for generating a motor driving signal according to the PWM high-low level signal.
In the embodiment of the invention, the digital control chip is a micro control unit or a digital signal processor; the digital logic chip is a field programmable gate array or an application specific integrated circuit. In particular, the circuit structure may be implemented according to the motor control circuit configuration shown in fig. 3. Based on the circuit shown in fig. 3, based on the fault of the circuit path of the FPGA/ASIC chip, see the second structure diagram of the motor control circuit in the fault situation shown in fig. 6, at this time, the DSP/MCU chip circuit is used to provide motor control, and the control low-voltage power supply can be channel 1 or channel 2, and the power supply level is detected by the power supply selection logic circuit to determine. At this time, the DSP/MCU chip needs to directly collect the bus voltage to complete motor control. Optionally, the second control feedback signal is a signal required for square wave control of the motor, for example: bus voltage. The control mode at this time can be a motor square wave control mode to maintain the motor to continue rotating.
It should be noted that, the MCU/DSP chip may directly collect the bus voltage signal to obtain the second control feedback signal, and provide a signal for design redundancy control. The MCU/DSP chip can directly generate PWM high-low level signals to the PWM conditioning circuit.
In an alternative embodiment, when a control circuit path formed by the first power supply channel, the first voltage conversion circuit, the digital control chip and the PWM conditioning circuit and based on the digital control chip fails, when the first power supply channel or the second power supply channel supplies power to the second voltage conversion circuit through the power supply selection logic circuit, the digital logic chip is configured to obtain a first control feedback signal by using an analog-to-digital conversion circuit, calculate according to the first control feedback signal to generate a PWM high-low level signal, and send the PWM high-low level signal to the PWM conditioning circuit; the PWM conditioning circuit is used for generating a motor driving signal according to the PWM high-low level signal.
In the embodiment of the invention, the digital control chip is a micro control unit or a digital signal processor; the digital logic chip is a field programmable gate array or an application specific integrated circuit. In particular, the circuit structure may be implemented according to the motor control circuit configuration shown in fig. 3. Based on the circuit shown in fig. 3, based on the fault of the circuit path of the DSP/MCU chip, see the first structure diagram of the motor control circuit in the fault situation shown in fig. 5, the motor control is independently provided by the circuit path of the FPGA/ASIC chip, and the control low-voltage power supply can be channel 1 or channel 2, and the power supply level is detected by the power supply selection logic circuit to determine.
The invention provides a motor control circuit, a motor control method and a motor driving system aiming at the circuit design of a motor control board of a motor driver. When any control circuit passage fails, continuous control of the motor by the motor control circuit can be ensured through the control circuit passage based on the digital control chip or the control circuit passage based on the digital logic chip, so that the failure rate of the control system is reduced, and the reliability of the driving system is improved. The circuit is designed for redundant circuits based on different physical mechanisms aiming at a control circuit part of a motor driver control board: and the control circuit path based on the MCU/DSP chip or the control circuit path based on the FPGA/ASIC chip selects a healthy path and a control strategy to complete motor control under different fault modes, so that the failure rate of a driver control circuit is reduced, and the reliability of the whole driving system is improved.
The exemplary embodiments of the present application also provide a motor control method, which is applied to the motor control circuit described above, and includes: acquiring a motor control feedback signal; the motor control feedback signal is a first control feedback signal or a second control feedback signal; generating a motor drive signal using the motor control circuit; and controlling a motor by using the motor driving signal.
In an alternative embodiment, when the first power supply channel supplies power to the first voltage conversion circuit through the power supply selection logic circuit and the second power supply channel supplies power to the second voltage conversion circuit through the power supply selection logic circuit, the digital logic chip acquires a first control feedback signal through an analog-to-digital conversion circuit and sends the first control feedback signal to the digital control chip; the digital control chip receives the first control feedback signal, calculates according to the first control feedback signal to generate a control modulation wave, and sends the control modulation wave to the digital logic chip; the digital logic chip generates PWM high-low level signals according to the control modulation wave and sends the PWM high-low level signals to the PWM conditioning circuit; and the PWM conditioning circuit generates a motor driving signal according to the PWM high-low level signal.
In an alternative embodiment, the first control feedback signal is one or more of the following signals: a current signal, a voltage signal, a speed signal, and a temperature signal.
In an alternative embodiment, the power supply selection logic circuit detects power supply levels of the first voltage conversion circuit and the second voltage conversion circuit, and determines operation states of the first power supply channel and the second power supply channel according to the power supply levels; if the first power supply channel fails, the second power supply channel is controlled to replace the first power supply channel; and if the second power supply channel fails, controlling the first power supply channel to replace the second power supply channel.
In an alternative embodiment, when a control circuit path formed by the second power supply channel, the second voltage conversion circuit, the digital logic chip and the PWM conditioning circuit and based on the digital logic chip fails, the digital control chip obtains a second control feedback signal, calculates according to the second control feedback signal to generate a PWM high-low level signal, and sends the PWM high-low level signal to the PWM conditioning circuit; and the PWM conditioning circuit generates a motor driving signal according to the PWM high-low level signal.
In an alternative embodiment, the second control feedback signal is a signal required for square wave control of the motor.
In an alternative embodiment, when a control circuit path formed by the first power supply channel, the first voltage conversion circuit, the digital control chip and the PWM conditioning circuit and based on the digital control chip fails, the digital logic chip obtains a first control feedback signal by using an analog-to-digital conversion circuit, calculates and generates a PWM high-low level signal according to the first control feedback signal, and sends the PWM high-low level signal to the PWM conditioning circuit; and the PWM conditioning circuit generates a motor driving signal according to the PWM high-low level signal.
In an alternative embodiment, the digital control chip is a micro control unit or a digital signal processor; the digital logic chip is a field programmable gate array or an application specific integrated circuit.
The exemplary embodiments of the present application also provide a motor driving system, wherein the motor driving system includes a motor and the motor control circuit described above.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention.

Claims (10)

1. A motor control circuit comprising: the power supply circuit comprises a first power supply channel, a second power supply channel, a power supply selection logic circuit, a first voltage conversion circuit, a digital control chip, a second voltage conversion circuit, a digital logic chip and a PWM conditioning circuit;
the first voltage conversion circuit is connected with the digital control chip, and the digital control chip is respectively connected with the digital logic chip and the PWM conditioning circuit;
the second voltage conversion circuit is connected with the digital logic chip, and the digital logic chip is connected with the PWM conditioning circuit;
the power supply selection logic circuit is used for controlling the first power supply channel to supply power to the first voltage conversion circuit or the second voltage conversion circuit;
the power supply selection logic circuit is further configured to control the second power supply channel to supply power to the first voltage conversion circuit or the second voltage conversion circuit.
2. The motor control circuit of claim 1 wherein when the first power supply path supplies power to the first voltage conversion circuit through the power supply selection logic circuit and the second power supply path supplies power to the second voltage conversion circuit through the power supply selection logic circuit,
the digital logic chip is used for acquiring a first control feedback signal by utilizing an analog-to-digital conversion circuit and sending the first control feedback signal to the digital control chip;
the digital control chip is used for receiving the first control feedback signal, calculating according to the first control feedback signal to generate a control modulation wave, and transmitting the control modulation wave to the digital logic chip;
the digital logic chip is further used for generating a PWM high-low level signal according to the control modulation wave and sending the PWM high-low level signal to the PWM conditioning circuit;
the PWM conditioning circuit is used for generating a motor driving signal according to the PWM high-low level signal.
3. The motor control circuit of claim 2 wherein the first control feedback signal is one or more of the following: a current signal, a voltage signal, a speed signal, and a temperature signal.
4. The motor control circuit of claim 1 wherein the power supply selection logic circuit is to:
detecting power supply levels of a first voltage conversion circuit and a second voltage conversion circuit, and judging the running states of the first power supply channel and the second power supply channel according to the power supply levels;
if the first power supply channel fails, the second power supply channel is controlled to replace the first power supply channel;
and if the second power supply channel fails, controlling the first power supply channel to replace the second power supply channel.
5. The motor control circuit of claim 1 wherein, when a digital logic chip-based control circuit path formed by the second power supply channel, the second voltage conversion circuit, the digital logic chip, and the PWM conditioning circuit fails,
the digital control chip is used for acquiring a second control feedback signal, calculating according to the second control feedback signal to generate a PWM high-low level signal, and sending the PWM high-low level signal to the PWM conditioning circuit;
the PWM conditioning circuit is used for generating a motor driving signal according to the PWM high-low level signal.
6. The motor control circuit of claim 5 wherein the second control feedback signal is a motor square wave control desired signal.
7. The motor control circuit of claim 1 wherein, when a digital control chip-based control circuit path formed by the first power supply channel, the first voltage conversion circuit, the digital control chip, and the PWM conditioning circuit fails,
the digital logic chip is used for acquiring a first control feedback signal by utilizing an analog-to-digital conversion circuit, calculating according to the first control feedback signal to generate a PWM high-low level signal, and sending the PWM high-low level signal to the PWM conditioning circuit;
the PWM conditioning circuit is used for generating a motor driving signal according to the PWM high-low level signal.
8. The motor control circuit of any one of claims 1-7, wherein the digital control chip is a micro control unit or a digital signal processor; the digital logic chip is a field programmable gate array or an application specific integrated circuit.
9. A motor control method, wherein the motor control method is applied to the motor control circuit according to any one of claims 1 to 8, the method comprising:
acquiring a motor control feedback signal; the motor control feedback signal is a second control feedback signal or a first control feedback signal;
generating a motor drive signal using the motor control circuit;
and controlling a motor by using the motor driving signal.
10. A motor drive system, wherein the motor drive system comprises a motor and the motor control circuit of any one of claims 1-8.
CN202211734533.3A 2022-12-30 2022-12-30 Motor control circuit and method and motor driving system Pending CN116054684A (en)

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Application Number Priority Date Filing Date Title
CN202211734533.3A CN116054684A (en) 2022-12-30 2022-12-30 Motor control circuit and method and motor driving system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211734533.3A CN116054684A (en) 2022-12-30 2022-12-30 Motor control circuit and method and motor driving system

Publications (1)

Publication Number Publication Date
CN116054684A true CN116054684A (en) 2023-05-02

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