An active short circuit control circuit, apparatus, control method, system and vehicle thereof

Abstract

The application discloses a kind of active short circuit control circuit and its device, control method, system and vehicle, circuit is powered by whole vehicle low-voltage power supply and whole vehicle bus, specifically includes: by controlling the state of own switching device, realize the control of motor, microcontroller, for output motor control signal;Driving module is electrically connected between power module and microcontroller, further include: microcontroller monitoring module, overvoltage monitoring module and active short circuit processing module.The application is improved by active short circuit control circuit, when either of microcontroller fault and bus voltage overvoltage occurs, active short circuit state can be triggered, and completely unnecessary to consider whether low-voltage side circuit is fault, when microcontroller itself appears fault and leads to motor control signal invalid, when microcontroller appears software failure, power failure and the like exception, send fault signal to active short circuit processing module, avoid irreversible damage of whole vehicle system caused by reverse electromotive force too high.

Description

Technical Field

[0001] This invention relates to a control circuit and its apparatus, control method, system, and vehicle, and more particularly to an active short-circuit control circuit and its apparatus, control method, system, and vehicle. Background Technology

[0002] In electric vehicle powertrain systems, the Intelligent Power Unit (IPU) is a core component of the electric drive system. It performs high-power DC-AC energy conversion, driving the motor to output torque and absorbing braking energy from the motor to charge the battery. The IPU consists of a main circuit composed of a power module, drive unit, bus capacitors, and copper busbars. The power module is the core component for energy conversion, while the drive unit converts the low-voltage control signals from the control unit into high-voltage signals to drive the power module, directly controlling the module's energy conversion. The reliability of the drive unit affects the overall vehicle safety; its ability to control the power module to operate safely and effectively is a crucial indicator of the vehicle's functional safety system.

[0003] Traditional protection circuits, upon detecting a motor fault, control the motor to enter a safe state. Typically, there are two safe states for the motor: one is to directly place all power switching devices in an open-circuit state (FreeWheeling, FW); the other is to place one half of the power switching device in an open-circuit state and the other half in a short-circuit state, also known as Active Short Circuit (ASC). When the motor is at high speed, to avoid the generation of back electromotive force, the motor is controlled to enter the ASC safe state; when the motor is at low speed, it is controlled to enter the FW state. When an electric vehicle is traveling at high speed, if the control and drive units of the inverter in the electric drive system malfunction, to prevent excessive back electromotive force from causing irreversible damage to the entire vehicle system, the motor needs to be controlled to enter an active short circuit state. However, current active short circuit triggering modes have various drawbacks, such as:

[0004] When a malfunction occurs in the drive unit or module (such as bus voltage overvoltage, module overvoltage or overcurrent, or drive chip failure), the drive unit will output a fault signal to the control unit. Subsequently, the control unit sends an active short-circuit signal to the drive unit, which is input to the low-voltage side of the drive chip, thereby driving the module into an active short-circuit state.

[0005] When the vehicle's low-voltage control power supply is interrupted, both the low-voltage and high-voltage sides of the drive chip lose power, causing the motor to lose control signals. At this time, the motor operates as a regenerative generator with a high back electromotive force. A backup power circuit then draws power from the bus voltage to supply power to the high-voltage side of the drive chip, and the drive module enters an active short-circuit state.

[0006] The two operating conditions described above correspond to active short-circuit control on the low-voltage and high-voltage sides, respectively. Active short-circuit control on the high-voltage side has a higher priority than active short-circuit control on the low-voltage side. The active short-circuit signal on the low-voltage side is triggered by the microcontroller in the control unit. In existing technology, when the microcontroller itself malfunctions, the motor control signal becomes invalid, and the high-voltage side cannot obtain the active short-circuit control signal. Alternatively, the active short circuit may be triggered on the low-voltage side of the driver chip, resulting in a certain time delay. Furthermore, the topology already contains delay circuits, leading to a slow fault response in the circuit structure—these problems urgently need to be solved. Summary of the Invention

[0007] The purpose of this invention is to provide an active short-circuit control circuit and its device, control method, system and vehicle. The first technical problem to be solved is to ensure the reliability and safety of the drive unit and power module by triggering an active short-circuit signal through a microcontroller, thereby ensuring the safety of the whole vehicle.

[0008] The next technical problem to be solved by the present invention is to set up an isolated drive power supply and a backup power supply module in the active short circuit control circuit, so as to provide backup power supply when the low voltage system loses power or the isolated drive power supply module fails, so that the active short circuit control circuit can continue to realize the function of controlling the active short circuit of the motor.

[0009] Another technical problem to be solved by the present invention is to provide a vehicle with active short-circuit control function. When the motor of the vehicle encounters conditions such as drive / power module failure, bus voltage overvoltage, or microcontroller malfunction, it can promptly enter an active short-circuit safety state to prevent excessive back electromotive force from damaging the entire vehicle system.

[0010] This invention provides the following solution:

[0011] An active short-circuit control circuit, wherein the active short-circuit control circuit is powered by the vehicle's low-voltage power supply and the vehicle's bus, specifically includes:

[0012] The power module controls the motor by controlling the state of its own switching devices;

[0013] A microcontroller is used to output motor control signals;

[0014] The driving module is electrically connected between the power module and the microcontroller. The function of the driving module is to perform opto-isolation and signal amplification on the control signal output by the microcontroller before sending it to the power module.

[0015] Also includes:

[0016] The microcontroller monitoring module is used to monitor the operating status of the microcontroller in real time. When the microcontroller malfunctions, it sends an abnormal signal to the active short-circuit handling module.

[0017] The overvoltage monitoring module is used to monitor the bus voltage in real time and output a voltage divider signal of the bus voltage to the active short-circuit processing module.

[0018] An active short-circuit processing module is connected to a drive module, a microcontroller monitoring module, and an overvoltage monitoring module. The active short-circuit processing module receives monitoring signals from the microcontroller monitoring module and voltage divider signals of the bus voltage from the overvoltage monitoring module. After signal processing, it outputs a digital signal to the drive module to control the active short-circuit state.

[0019] Furthermore, it also includes:

[0020] The isolated drive power supply is used to convert the voltage of the vehicle's low-voltage system into a high-voltage drive voltage to power the high-voltage side circuit, active short-circuit handling module, and overvoltage monitoring module.

[0021] The backup power module draws power from the bus voltage. When the low-voltage system loses power or the isolation drive power module fails, the backup power module supplies power to the high-voltage side circuit, the active short-circuit handling module, and the overvoltage monitoring module.

[0022] Furthermore, the active short-circuit processing module isolates the low-voltage signal emitted by the microcontroller monitoring module and converts it into a high-voltage side signal, and detects whether the bus voltage exceeds the safety threshold based on the voltage division signal of the bus voltage.

[0023] The active short-circuit processing module specifically includes: an isolation module, a signal processing module, a buffer, a comparator, and an OR gate, wherein:

[0024] The isolation module receives the monitoring signal from the microcontroller monitoring module, isolates the monitoring signal from the low-voltage signal and converts it into a high-voltage side signal, and outputs it to the signal processing module.

[0025] The signal processing module receives the high-voltage side signal for identification and monitoring from the signal processing module, and sends a digital signal to one end of the OR gate to control the active short-circuit state.

[0026] The buffer receives the divided voltage signal from the bus voltage of the overvoltage monitoring module, performs impedance matching, and sends the divided voltage signal into the comparator.

[0027] When the voltage divider signal of the bus voltage exceeds the threshold, the comparator sends an active short-circuit control signal to the other end of the OR gate.

[0028] The OR gate sends an active short-circuit signal to the high-voltage side circuit when either the microcontroller or the bus voltage is abnormal, and then the high-voltage side circuit drives the power module.

[0029] Furthermore, the isolation module is an optocoupler. The positive terminal of the light-emitting diode in the optocoupler is the microcontroller's operating status signal input terminal, the negative terminal of the light-emitting diode is grounded, the collector of the phototransistor corresponding to the light-emitting diode is connected to the positive terminal of the first diode, the emitter of the phototransistor is grounded, one end of the first capacitor and the first resistor are respectively connected between the non-inverting terminals of the first diode and the second comparator, the other end of the first capacitor and the first resistor are grounded, the inverting terminal of the second comparator is connected to a high level, the inverting terminal of the third comparator is connected between the non-inverting terminals of the first diode and the second comparator, the non-inverting terminal of the third comparator is connected to a low level, the output terminals of the second and third comparators are respectively connected to the two input terminals of the fourth OR gate, the output terminal of the fourth OR gate is connected to one input terminal of the fifth OR gate, and the output terminal of the fifth OR gate is an active short-circuit signal terminal.

[0030] Furthermore, the buffer includes a sixth operational amplifier, a second resistor, and a second capacitor. The non-inverting input of the sixth operational amplifier is connected to one end of the second resistor, and the other end of the second resistor is connected to the overvoltage monitoring signal input. The inverting input of the sixth operational amplifier is connected to the output. The output of the sixth operational amplifier is also connected to one end of the third resistor, and the other end of the third resistor is connected to the non-inverting input of the seventh operational amplifier. A fourth resistor is connected between the non-inverting input and the output of the seventh operational amplifier. The inverting input of the seventh operational amplifier is used to set the equivalent threshold voltage. The output of the seventh operational amplifier is connected to the other input of the fifth OR gate, and the output of the fifth OR gate is the active short-circuit signal terminal.

[0031] An active short-circuit control device, wherein the active short-circuit control device is provided with the aforementioned active short-circuit control circuit.

[0032] An active short-circuit control method, specifically including:

[0033] Detect whether there is a fault in the drive module or power module, and send an active short-circuit signal or maintain the original state for normal operation depending on whether a fault exists;

[0034] Determine whether the bus voltage is over-voltage, and further determine whether the bus voltage has discharged to below the judgment threshold voltage, and send an active short-circuit signal or maintain the original state for normal operation;

[0035] The microcontroller's operating status is detected, and an active short-circuit signal is sent or the original state is maintained for normal operation.

[0036] Furthermore, specifically including:

[0037] The system detects whether there is a fault in the drive module or power module. If a fault is found, the drive module sends a fault signal to the microcontroller. After the microcontroller recognizes the fault and reports it to the vehicle, it sends an active short circuit signal to the drive module, and the motor enters an active short circuit safety state. Alternatively, if there is no fault, the system maintains its original state and operates normally.

[0038] The system determines whether the bus voltage is overvoltage. If the bus voltage is not overvoltage, it maintains its original normal operation. If the bus voltage is overvoltage, the active short-circuit processing module sends an active short-circuit signal to the high-voltage drive circuit and further determines whether the bus voltage has discharged below the turn-off threshold voltage. If the bus voltage has discharged below the turn-off threshold voltage, the active short-circuit processing module stops sending active short-circuit signals. If the bus voltage discharge is not below the turn-off threshold voltage, the active short-circuit processing module continues to send active short-circuit signals.

[0039] Determine if the microcontroller is working properly. If the microcontroller is working properly, maintain the original state and work normally. Or, if the microcontroller is malfunctioning, the active short circuit processing module sends an active short circuit signal to the drive high voltage circuit.

[0040] An active short-circuit control system, specifically comprising:

[0041] The drive / power module fault detection unit is used to detect whether there is a fault in the drive module or power module, and send an active short circuit signal or maintain the original state for normal operation.

[0042] The bus voltage overvoltage detection unit is used to determine whether the bus voltage is overvoltage, and further determine whether the bus voltage has discharged to below the judgment threshold voltage, and send an active short circuit signal or maintain the original state for normal operation.

[0043] The microcontroller status detection unit is used to send an active short-circuit signal or maintain the original normal operation based on the microcontroller's operating status.

[0044] An electronic device includes: a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other via the communication bus; the memory stores a computer program, and when the computer program is executed by the processor, the processor performs the steps of the method.

[0045] A computer-readable storage medium storing a computer program executable by an electronic device, which, when run on the electronic device, causes the electronic device to perform the steps of a method.

[0046] A vehicle equipped with an active short-circuit control system, wherein when a fault occurs in the control and drive unit of the vehicle's electric drive system inverter, the active short-circuit control system controls the motor to enter an active short-circuit state, and further includes:

[0047] Electronic equipment used to implement active short-circuit control methods;

[0048] A processor that runs a program that, when the program runs, executes the steps of an active short-circuit control method based on data output from the electronic device.

[0049] A storage medium for storing a program that, when running, performs the steps of an active short-circuit control method on data output from an electronic device.

[0050] Compared with the prior art, the present invention has the following advantages:

[0051] By improving the active short-circuit control circuit, an active short-circuit state can be triggered in either case of microcontroller failure or bus voltage overvoltage, without considering whether the low-voltage side circuit is faulty. When the microcontroller itself fails and the motor control signal becomes invalid, the microcontroller's monitoring unit directly sends an active short-circuit control signal to the high-voltage side, avoiding irreversible damage to the entire vehicle system caused by excessively high back electromotive force.

[0052] The active short-circuit control circuit includes an isolated drive power supply and a backup power supply module. The isolated drive power supply converts the voltage of the vehicle's low-voltage system into a high-voltage drive voltage to power the high-voltage side circuit, the active short-circuit handling module, and the overvoltage monitoring module. When the low-voltage system loses power or the isolated drive power supply module fails, the backup power supply module draws power from the bus voltage and supplies power to the high-voltage side circuit, the active short-circuit handling module, and the overvoltage monitoring module, enabling the active short-circuit control circuit to continue its function of controlling the motor's active short circuit.

[0053] The present invention discloses an active short-circuit control method and system based on an active short-circuit circuit. The control method and system can send an active short-circuit signal based on control logic judgment factors such as whether the drive module and power module are faulty, whether the bus voltage is over-voltage, and whether the microcontroller is working properly. This controls the motor to enter the active short-circuit safety state in a timely manner, preventing excessive back electromotive force from damaging the entire vehicle system.

[0054] The vehicle disclosed in this invention has an active short-circuit control function. When the vehicle's motor encounters conditions such as drive / power module failure, bus voltage overvoltage, or microcontroller malfunction, it can promptly enter an active short-circuit safety state to prevent excessive back electromotive force from damaging the entire vehicle system. Attached Figure Description

[0055] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0056] Figure 1 This is a block diagram of the active short-circuit control circuit.

[0057] Figure 2 This is a block diagram of the active short-circuit handling module.

[0058] Figure 3 This is the circuit schematic of the active short-circuit handling module.

[0059] Figure 4 This is a flowchart of the active short-circuit control method.

[0060] Figure 5 This is the architecture diagram of an active short-circuit control system.

[0061] Figure 6 This is a flowchart (one of) a possible specific embodiment of an active short-circuit control method.

[0062] Figure 7 This is a flowchart (Part Two) of a possible specific embodiment of the active short-circuit control method.

[0063] Figure 8 This is a flowchart (Part 3) of a possible specific embodiment of the active short-circuit control method.

[0064] Figure 9 This is a system architecture diagram of an electronic device. Detailed Implementation

[0065] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0066] like Figure 1 The active short-circuit control circuit shown is powered by the vehicle's low-voltage power supply and the vehicle bus, and specifically includes:

[0067] The power module 180 controls the motor by controlling the state of its own switching devices;

[0068] The microcontroller 100 is used to output motor control signals and perform active short-circuit control on the motor. For example, the microcontroller 100 receives vehicle commands and outputs motor control signals to the drive module 110.

[0069] The drive module 110 is electrically connected between the power module 180 and the microcontroller 100. The function of the drive module 110 is to perform opto-isolation and signal amplification on the control signal output by the microcontroller 100 and then send it to the power module 180.

[0070] For example: when an electrical signal is applied to the input terminal, the emitter emits light, and the receiver receives the light, generating a photocurrent that flows out from the output terminal, thus realizing the "electrical-optical-electrical" conversion. Using light as a medium to couple the input signal to the output terminal has advantages such as no contact points, strong anti-interference ability, insulation between the output and input, and unidirectional signal transmission.

[0071] The drive module 110 includes an upper three-bridge drive circuit and a lower three-bridge drive circuit. Each bridge drive circuit is divided into a low-voltage side circuit and a high-voltage side circuit. When the electric drive system is working normally, the low-voltage side circuit is powered by a low-voltage power supply, and the high-voltage side circuit is powered by an isolated drive power supply.

[0072] The microcontroller monitoring module 120 is used to monitor the operating status of the microcontroller 100 in real time. When the microcontroller 100 malfunctions, it sends an abnormal signal to the active short-circuit processing module 150. For example, the microcontroller monitoring module 120 monitors the operating status of the microcontroller 100. When the microcontroller malfunctions, such as software failure or power failure, it sends a fault signal to the active short-circuit processing module 150.

[0073] The overvoltage monitoring module 130 is used to monitor the bus voltage in real time. Through the principle of resistor voltage division, it outputs the bus voltage division signal to the active short circuit processing module 150. Those skilled in the art will understand that the signal voltage output by the voltage divider circuit is sent to the next stage circuit. Theoretically, the input of the next stage circuit of the voltage divider circuit is the output terminal of the voltage divider circuit.

[0074] The active short-circuit processing module 150 is connected to the drive module 110, the microcontroller 100 monitoring module, and the overvoltage monitoring module 130. The active short-circuit processing module 150 receives the monitoring signal from the microcontroller monitoring module 120 and the voltage divider signal of the bus voltage from the overvoltage monitoring module 130. After signal processing, it outputs a digital signal to the drive module 110 to control the active short-circuit state.

[0075] The working principle of the main circuit of the active short-circuit control circuit is as follows:

[0076] When the vehicle voltage supply is normal, the low-voltage side circuit of the microcontroller 100, the drive module 110, and the microcontroller monitoring module 120 are all powered by the low-voltage power supply; the high-voltage side circuit of the drive module 110, the overvoltage monitoring module 130, and the active short-circuit processing module 150 are all powered by the low-voltage power supply through the isolated drive power supply module 190.

[0077] When the vehicle's low-voltage power fails or the isolation drive power module 190 is disconnected, the backup power module 170 supplies power to the drive module's high-voltage side circuit 160, overvoltage monitoring module 130, and active short-circuit processing module 150.

[0078] The overvoltage monitoring module 130 monitors the bus voltage in real time and outputs the bus voltage division signal to the active short-circuit processing module 150 through the principle of resistor voltage division.

[0079] The active short-circuit processing module 150 receives monitoring signals from the microcontroller monitoring module 120 and voltage divider signals of the bus voltage from the overvoltage monitoring module 130. After signal processing, it outputs digital signals to the drive module 110 to control the active short-circuit state, adjusts the switching transistors in the power module 180, and controls the motor to enter the active short-circuit safety state. The ASC signal output by the active short-circuit processing module 150 to control the active short-circuit state has a higher priority and covers the control of the drive module 110 by the microcontroller 100.

[0080] Preferred options also include:

[0081] The isolated drive power module 190 is used to convert the voltage of the vehicle's low-voltage system into a high-voltage drive voltage to power the drive high-voltage side circuit 160, the active short-circuit processing module 150, and the overvoltage monitoring module 130.

[0082] The backup power module 170 draws power from the bus voltage. When the low-voltage system loses power or the isolation drive power module 190 fails, the backup power module supplies power to the high-voltage side circuit 160, the active short-circuit handling module 150, and the overvoltage monitoring module 130, respectively. Because of the presence of the backup power module 170, even if the low-voltage system loses power or the isolation drive power module 190 fails, the backup power module 170 can still supply power to the high-voltage side circuit 160, the active short-circuit handling module 150, and the overvoltage monitoring module 130, ensuring the system's active short-circuit function.

[0083] like Figure 2 The schematic diagram of the active short-circuit processing module 150 shown is as follows:

[0084] The active short-circuit processing module 150 includes an isolation module 151, a signal processing module 152, a buffer 153, a comparator 154, and an OR gate 155, wherein:

[0085] The isolation module 151 receives the monitoring signal sent by the microcontroller monitoring module 120, isolates the monitoring signal from the low-voltage signal and converts it into a high-voltage side signal, and outputs it to the signal processing module 152.

[0086] The signal processing module 152 receives the high-voltage side signal for identification and monitoring from the signal processing module and sends a digital signal to one end of the OR gate 155 to control the active short circuit state.

[0087] Buffer 153 receives the voltage divider signal from the bus voltage of overvoltage monitoring module 130, performs impedance matching, and sends the voltage divider signal into comparator 154; without buffer 153, overvoltage monitoring module 130 is directly connected to comparator 154, and the internal resistance of comparator 154 will affect the voltage divider value.

[0088] When the voltage divider signal of the bus voltage exceeds the threshold, comparator 154 sends an active short-circuit control signal to the other end of OR gate 155.

[0089] OR gate 155 sends an active short-circuit signal to the high-voltage side circuit 160 when either the microcontroller or the bus voltage is abnormal. Then, the high-voltage side circuit 160 drives the power module 180 to control the motor.

[0090] like Figure 3 The circuit diagram of the active short-circuit processing module 150 shown is illustrated. Vmon is the microcontroller's operating status signal, which is connected to the optocoupler U1 (isolation optocoupler). The first resistor R1, the first diode D1, the first capacitor C1, the second comparator U2, the third comparator U3, and the fourth OR gate U4 together form the signal processing module 152. The anode of the first diode D1 is connected to the output of the optocoupler U1. The first resistor R1 and the first capacitor C1 are connected in parallel between the cathode of the first diode D1 and ground. This means the output of the optocoupler U1 is connected to the non-inverting input of the second comparator U2 and the inverting input of the third comparator U3. The outputs of the two comparators serve as the two inputs of the fourth OR gate U4, and the output of the fourth OR gate U4 is the output of the signal processing module 152.

[0091] The circuit connection relationship of specific circuit components in the principle block diagram of the active short-circuit processing module 150 is as follows: The isolation module 151 is an optocoupler U1. The positive terminal of the light-emitting diode in the optocoupler U1 is the input terminal of the microcontroller's working status signal Vmon. The negative terminal of the light-emitting diode is grounded. The collector of the phototransistor corresponding to the light-emitting diode is connected to the positive terminal of the first diode D1. The emitter of the phototransistor is grounded. One end of the first capacitor C1 and the first resistor R1 are respectively connected between the non-inverting terminals of the first diode D1 and the second comparator U2. The other end of the first capacitor C1 and the first resistor R1 is grounded. The inverting terminal of the second comparator U2 is connected to a high level. The inverting terminal of the third comparator U3 is connected between the non-inverting terminals of the first diode D1 and the second comparator U2. The non-inverting terminal of the third comparator U3 is connected to a low level. The output terminals of the second and third comparators are respectively connected to the two input terminals of the fourth OR gate U4. The output terminal of the fourth OR gate U4 is connected to one input terminal of the fifth OR gate U5. The output terminal of the fifth OR gate U5 is the active short-circuit signal terminal.

[0092] Buffer 153 includes a sixth operational amplifier U6, a second resistor R2, and a second capacitor C2. The non-inverting input of the sixth operational amplifier U6 is connected to one end of the second resistor R2, and the other end of the second resistor R2 is connected to the overvoltage monitoring signal input terminal V. dc The inverting input of the sixth operational amplifier U6 is connected to the output terminal. The output terminal of the sixth operational amplifier U6 is also connected to one end of the third resistor R3. The other end of the third resistor R3 is connected to the non-inverting input of the seventh operational amplifier U7. The fourth resistor R4 is connected between the non-inverting input and the output terminal of the seventh operational amplifier U7. The inverting input of the seventh operational amplifier U7 is used to set the equivalent threshold voltage. The output terminal of the seventh operational amplifier U7 is connected to the other input terminal of the fifth OR gate U5. The output terminal of the fifth OR gate U5 is the active short-circuit signal terminal.

[0093] The circuit principle of the active short-circuit processing module 150 is as follows: The Vmon signal is a square wave signal with a variable duty cycle. When the microcontroller is working normally, the Vmon signal has a 50% duty cycle. When the microcontroller malfunctions, the duty cycle of the Vmon signal changes. If the low voltage drops, the Vmon signal will also drop, equivalent to a 0% duty cycle signal. After being isolated by the optocoupler U1, the Vmon signal charges the first capacitor C1 through the first diode D1. The function of the first diode D1 is to ensure that when the Vmon signal is 0, the first capacitor C1 can be fully discharged through the first resistor R1. By properly setting the values ​​of the first capacitor C1 and the first resistor R1, the voltage of the first capacitor C1 can be maintained within the range of Vh and Vl when the Vmon signal duty cycle is 50%. At this time, both the second comparator U2 and the third comparator U3 output "0". Once the duty cycle of the Vmon signal changes, the voltage of the first capacitor C1 will exceed the range of Vh and Vl, and one of the second comparators U2 and the third comparator U3 will output "1", thereby initiating an active short circuit.

[0094] V dc The signal is an analog level signal obtained by voltage division of the bus voltage. V dc The signal is first input to a low-pass filter circuit composed of the second resistor R2 and the second capacitor C2 to prevent certain voltage spikes from causing false activation of the active short circuit. Then, after passing through the sixth operational amplifier U6, it is input to comparator 154. The function of the sixth operational amplifier U6 is to prevent the filter from affecting the input impedance of the comparator. The seventh comparator U7, the third resistor R3, and the fourth resistor R4 form a hysteresis comparator. By designing the threshold voltage Vth, the resistance values ​​of the third resistor R3, and the fourth resistor R4, suitable high and low voltage threshold resistors Vth(h) and Vth(l) can be obtained. During the process of the comparator input voltage increasing from 0 to Vth(h), that is, the bus voltage increasing from 0V to the overvoltage threshold, the seventh operational amplifier U7 outputs "0"; after the bus voltage exceeds the threshold, the seventh operational amplifier U7 outputs "1", activating the active short circuit; as the motor back electromotive force decreases, when the bus voltage decreases to the turn-off threshold, that is, when the strong input voltage drops below Vth(l), the seventh operational amplifier U7 outputs "0", deactivating the active short circuit.

[0095] In summary, whenever the microcontroller 100 monitors the signal Vmon or the overvoltage monitoring signal Vdc and an abnormality occurs, the OR gate 155 can output an active short-circuit signal to achieve the active short-circuit function.

[0096] Based on the disclosed active short-circuit control circuit, this invention also discloses a corresponding active short-circuit control device. This active short-circuit control device includes an active short-circuit control circuit and operates on the high-voltage side of the drive unit. It can trigger an active short-circuit state in either a microcontroller fault or a bus voltage overvoltage, without considering whether the low-voltage side circuit is faulty. In this device, the active short-circuit module 150 does not interfere with the connection between the microcontroller 100 and the drive module 110. The ASC signal output by the active short-circuit module 150 has a higher priority, covering the control effect of the microcontroller 100 on the drive module 110, thus achieving the effect that the priority of the high-voltage side active short-circuit control is higher than that of the low-voltage side active short-circuit control.

[0097] like Figure 4 As shown, based on the disclosure of the active short-circuit control circuit and its device, this invention also discloses an active short-circuit control method corresponding to the circuit and its device. The method steps specifically include:

[0098] Detect whether there is a fault in the drive module or power module, and send an active short-circuit signal or maintain the original state for normal operation depending on whether a fault exists;

[0099] Determine whether the bus voltage is over-voltage, and further determine whether the bus voltage has discharged to below the judgment threshold voltage, and send an active short-circuit signal or maintain the original state for normal operation;

[0100] The microcontroller's operating status is detected, and an active short-circuit signal is sent or the original state is maintained for normal operation.

[0101] In the active short-circuit control method disclosed in this embodiment, those skilled in the art, based on their general technical knowledge or common sense in the field and in conjunction with the content disclosed in this specification, are able to determine or detect whether there is a fault in the drive module or power module, whether the bus voltage is over-voltage, and also detect the working status of the microcontroller.

[0102] For the purpose of simplicity, the method steps disclosed in this embodiment are described as a series of actions. However, those skilled in the art should understand that the embodiments of the present invention are not limited to the described order of actions, because according to the embodiments of the present invention, some steps can be performed in other orders or simultaneously. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions involved are not necessarily essential to the embodiments of the present invention.

[0103] like Figure 5 The active short-circuit control system architecture diagram shown in this invention specifically includes:

[0104] The drive / power module fault detection unit is used to detect whether there is a fault in the drive module or power module, and send an active short circuit signal or maintain the original state for normal operation.

[0105] The bus voltage overvoltage detection unit is used to determine whether the bus voltage is overvoltage, and further determine whether the bus voltage has discharged to below the judgment threshold voltage, and send an active short circuit signal or maintain the original state for normal operation.

[0106] The microcontroller status detection unit is used to send an active short-circuit signal or maintain the original normal state according to the microcontroller's operating status.

[0107] It is worth noting that although only the drive / power module fault detection unit, the bus voltage overvoltage detection unit, and the microcontroller status detection unit are disclosed in this system, it does not mean that the composition of this system is limited to the above-mentioned basic functional units. On the contrary, the present invention aims to demonstrate that, based on the above-mentioned basic functional units, those skilled in the art can arbitrarily add one or more functional units in combination with existing technology to form an infinite number of embodiments or technical solutions. In other words, this system is open rather than closed. The fact that this embodiment only discloses a few basic functional modules does not mean that the scope of protection of the claims of this invention is limited to the disclosed basic functional units. Furthermore, for ease of description, the above devices are described separately according to their functions as various units and modules. Of course, in implementing this invention, the functions of each unit and module can be implemented in one or more software and / or hardware components.

[0108] The system described above is merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0109] like Figures 6 to 8 The illustration shows one (or more) possible embodiments that demonstrate how the active short-circuit control method is implemented in a specific application scenario by detecting whether the drive / power module is faulty, determining whether the bus voltage is overvoltage, and whether the microcontroller is working properly. Specifically:

[0110] like Figure 6As shown, step S300: Detect whether there is a fault in the drive module or power module. If there is a fault, then execute step S310: The drive module sends a fault signal to the microcontroller. After the microcontroller recognizes and reports to the whole vehicle, it sends an active short circuit signal to the drive module, and the motor enters the active short circuit safety state. Or: If there is no fault, then execute step S320 to maintain the original state and work normally.

[0111] like Figure 7 As shown, step S330: Determine if the bus voltage is overvoltage. If the bus voltage is not overvoltage, proceed to step S370 to maintain normal operation in the original state. If the bus voltage is overvoltage, proceed to step S340, where the active short-circuit processing module sends an active short-circuit signal to the high-voltage drive circuit, and proceed to step S350 to further determine if the bus voltage has discharged below the turn-off threshold voltage. If the bus voltage has discharged below the turn-off threshold voltage, proceed to step S360, where the active short-circuit processing module stops sending the active short-circuit signal. If the bus voltage discharge is not below the turn-off threshold voltage, the active short-circuit processing module continues to send the active short-circuit signal.

[0112] like Figure 8 As shown, step S380: Determine whether the microcontroller is working properly. If the microcontroller is working properly, then execute step S400 to maintain the original state and work normally. Or: If the microcontroller is malfunctioning, execute step S400, and the active short circuit processing module sends an active short circuit signal to the drive high voltage circuit.

[0113] Based on the circuit principle and control logic of the above-mentioned active short-circuit control circuit, this invention provides four different operating modes:

[0114] MODE 1 (Normal working mode)

[0115] When both the low-voltage and bus voltage of the vehicle system are within the normal operating range, the vehicle's low-voltage system supplies power to the microcontroller 100, the microcontroller monitoring module 120, and the low-voltage drive circuit 140. The low-voltage power is then isolated and converted by the isolated drive power supply module 190 before supplying power to the high-voltage drive circuit 160, the active short-circuit handling module 150, and the overvoltage monitoring module 130. In this mode, the microcontroller 100 sends a PWM signal to the drive module 110, which outputs a high-voltage drive signal to the power module 180, and the motor operates normally. Simultaneously, the drive module 110 constantly monitors its own status and the status of the power module 180, the microcontroller monitoring module 120 constantly monitors the status of the microcontroller, and the overvoltage monitoring module 130 constantly monitors the bus voltage.

[0116] MODE 2 (Drive module or power module failure)

[0117] In this mode, the vehicle power supply is normal. However, when the drive module 110 or the power module 180 malfunctions (such as a damaged drive chip, overvoltage or overcurrent in the power module), the drive module 110 sends a fault signal to the microcontroller 100. After the microcontroller 100 identifies the fault and reports it to the vehicle, it sends an active short-circuit signal to the drive module 110, and the motor enters an active short-circuit safety state.

[0118] MODE 3 (Overvoltage fault)

[0119] When the bus voltage exceeds the safety threshold, the voltage divider signal of the bus voltage output by the overvoltage monitoring module 130 will also exceed the safety threshold. Once the signal output by the buffer 153 is greater than the safety threshold voltage of the comparator 154, the comparator outputs an active short-circuit control signal to the OR gate 155. In the active short-circuit state, as the motor discharges, the bus voltage gradually decreases, and the switching transistor of the power module 180 will enter linear amplification mode, generating a large amount of heat. Therefore, it is necessary to set a turn-off threshold voltage in the design of the comparator 154. When the signal output by the buffer 153 is less than the turn-off threshold voltage, the active short-circuit state is exited.

[0120] MODE 4 (Microcontroller Failure)

[0121] When the vehicle experiences a low-voltage power failure, a microcontroller hardware malfunction, or a software failure, the microcontroller monitoring module 120 sends a fault signal to the active short-circuit processing module 150. If a low-voltage power failure occurs, the microcontroller 100, the low-voltage drive circuit 140, and the isolated drive power supply module 190 will all be without power. In this case, the backup power supply 170 will supply power to the high-voltage drive circuit 160 and the active short-circuit processing module 150. When the microcontroller monitoring module 120 sends a fault signal to the active short-circuit processing module 150, the signal is first converted into a high-voltage side signal by the isolation module 151, and then identified by the signal processing module 152. If the signal becomes abnormal, the signal processing module 152 will send an active short-circuit control signal to the OR gate 155, thereby causing the motor to enter an active short-circuit state.

[0122] like Figure 9 As shown, the present invention also discloses electronic devices and storage media corresponding to the active short-circuit control circuit and its apparatus, control method, and system:

[0123] An electronic device includes: a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other via the communication bus; the memory stores a computer program, and when the computer program is executed by the processor, the processor performs the steps of an active short-circuit control method.

[0124] A computer-readable storage medium storing a computer program executable by an electronic device, which, when run on the electronic device, causes the electronic device to perform the steps of an active short-circuit control method.

[0125] The communication bus mentioned in the above electronic devices can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. This communication bus can be divided into address bus, data bus, control bus, etc. For ease of illustration, only one thick line is used to represent it in the diagram, but this does not mean that there is only one bus or one type of bus.

[0126] Electronic devices comprise a hardware layer, an operating system layer running on top of the hardware layer, and an application layer running on the operating system. The hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and memory. The operating system can be any one or more computer operating systems that control the electronic device through processes, such as Linux, Unix, Android, iOS, Windows, or various in-vehicle operating systems and in-vehicle central control systems.

[0127] In this embodiment of the invention, the executing entity for electronic device control can be an electronic device itself, or a functional module within an electronic device capable of calling and executing a program. The electronic device can obtain the firmware corresponding to the storage medium. This firmware is provided by the supplier, and different storage media may have the same or different firmware; no limitation is made here. After obtaining the firmware corresponding to the storage medium, the electronic device can write this firmware into the storage medium; specifically, it burns the firmware corresponding to the storage medium into the storage medium. The process of burning the firmware into the storage medium can be implemented using existing technology, and will not be elaborated upon in this embodiment of the invention.

[0128] Electronic devices can also obtain reset commands corresponding to storage media. These reset commands are provided by the supplier, and the reset commands for different storage media can be the same or different, which is not limited here.

[0129] At this time, the storage medium of the electronic device is a storage medium on which the corresponding firmware has been written. The electronic device can respond to the reset command corresponding to the storage medium on which the corresponding firmware has been written, thereby resetting the storage medium on which the corresponding firmware has been written according to the reset command. The process of resetting the storage medium according to the reset command can be implemented by existing technology and will not be described in detail in this embodiment of the invention.

[0130] The present invention also discloses a vehicle, particularly an electric vehicle, equipped with an active short-circuit control system. When the control and drive unit of the vehicle's electric drive system inverter malfunctions, the active short-circuit control system is used to control the motor to enter an active short-circuit state, and further includes:

[0131] Electronic equipment used to implement active short-circuit control methods;

[0132] The processor runs a program, and when the program runs, it executes the steps of the active short-circuit control method based on the data output from the electronic device.

[0133] A storage medium used to store a program that, when running, executes the steps of an active short-circuit control method on data output from an electronic device.

[0134] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the meaning consistent with their meaning in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless specifically defined.

[0135] It should be noted that certain terms are used in this specification and claims to refer to specific elements. Those skilled in the art will understand that vehicle manufacturers may use different terms to refer to the same element. This specification and claims do not distinguish elements based on differences in terminology, but rather on differences in function. As used throughout this specification and claims, "comprising" or "including" is an open-ended term and should be understood as "including but not limited to". Preferred embodiments of the invention will be described subsequently; however, this description is for the purpose of understanding the general principles of the specification and is not intended to limit the scope of the invention. The scope of protection of this invention is determined by the appended claims.

[0136] As can be seen from the above description of the embodiments, those skilled in the art can clearly understand that the present invention can be implemented by means of software plus necessary general-purpose hardware platforms. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in various embodiments or some parts of the embodiments of the present invention.

[0137] This invention can be used in a wide range of general-purpose or special-purpose computing system environments or configurations, such as: personal computers, server computers, handheld or portable devices, tablet devices, multiprocessor systems, microprocessor-based systems, set-top boxes, programmable consumer electronics devices, network PCs, minicomputers, mainframe computers, distributed computing environments including any of the above systems or devices, etc.

[0138] This invention can be described in the general context of computer-executable instructions, such as program modules, that are executed by a computer. Generally, program modules include routines, programs, objects, components, data structures, etc., that perform a specific task or implement a specific abstract data type. This invention can also be practiced in distributed computing environments where tasks are performed by remote processing devices connected via a communication network. In distributed computing environments, program modules can reside in local and remote computer storage media, including storage devices.

[0139] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0140] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0141] In the several embodiments provided by this invention, it should be understood that the disclosed apparatus and methods can also be implemented in other ways. The apparatus embodiments described above are merely illustrative; for example, the flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods, and computer program products according to various embodiments of the invention. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than those marked in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram and / or flowchart, and combinations of blocks in block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

[0142] In addition, the functional modules in the various embodiments of the present invention can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0143] If the aforementioned functions are implemented as software functional modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks. It should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0144] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An active short-circuit control circuit, wherein the active short-circuit control circuit is powered through the vehicle's low-voltage power supply and the vehicle's busbar, specifically comprising: The power module controls the motor by controlling the state of its own switching devices; A microcontroller is used to output motor control signals; The driving module is electrically connected between the power module and the microcontroller. The function of the driving module is to perform opto-isolation and signal amplification on the control signal output by the microcontroller before sending it to the power module. Its characteristic is that it further includes: The microcontroller monitoring module is used to monitor the operating status of the microcontroller in real time. When the microcontroller malfunctions, it sends an abnormal signal to the active short-circuit handling module. The overvoltage monitoring module is used to monitor the bus voltage in real time and output a voltage divider signal of the bus voltage to the active short-circuit processing module. An active short-circuit processing module is connected to a drive module, a microcontroller monitoring module, and an overvoltage monitoring module. The active short-circuit processing module receives monitoring signals from the microcontroller monitoring module and voltage divider signals of the bus voltage from the overvoltage monitoring module. After signal processing, it outputs a digital signal to the drive module to control the active short-circuit state. This also includes: The isolated drive power supply is used to convert the voltage of the vehicle's low-voltage system into a high-voltage drive voltage to power the high-voltage side circuit, active short-circuit handling module, and overvoltage monitoring module. The backup power module draws power from the bus voltage. When the low-voltage system loses power or the isolation drive power module fails, the backup power module supplies power to the high-voltage side circuit, the active short-circuit handling module, and the overvoltage monitoring module, respectively.

2. The active short-circuit control circuit according to claim 1, characterized in that, The active short-circuit processing module isolates the low-voltage signal sent by the microcontroller monitoring module and converts it into a high-voltage side signal, and detects whether the bus voltage exceeds the safety threshold based on the voltage division signal of the bus voltage. The active short-circuit processing module specifically includes: an isolation module, a signal processing module, a buffer, a comparator, and an OR gate, wherein: The isolation module receives the monitoring signal from the microcontroller monitoring module, isolates the monitoring signal from the low-voltage signal and converts it into a high-voltage side signal, and outputs it to the signal processing module. The signal processing module receives the high-voltage side signal for identification and monitoring from the signal processing module, and sends a digital signal to one end of the OR gate to control the active short-circuit state. The buffer receives the divided voltage signal from the bus voltage of the overvoltage monitoring module, performs impedance matching, and sends the divided voltage signal into the comparator. When the voltage divider signal of the bus voltage exceeds the threshold, the comparator sends an active short-circuit control signal to the other end of the OR gate. The OR gate sends an active short-circuit signal to the high-voltage side circuit when either the microcontroller or the bus voltage is abnormal, and then the high-voltage side circuit drives the power module.

3. The active short-circuit control circuit according to claim 2, characterized in that, The isolation module is an optocoupler. The positive terminal of the light-emitting diode (LED) in the optocoupler is the input terminal of the microcontroller's operating status signal, and the negative terminal of the LED is grounded. The collector of the phototransistor corresponding to the LED is connected to the positive terminal of the first diode, and the emitter of the phototransistor is grounded. One end of the first capacitor and the first resistor are respectively connected between the non-inverting terminals of the first diode and the second comparator, and the other end of the first capacitor and the first resistor is grounded. The inverting terminal of the second comparator is connected to a high level, and the inverting terminal of the third comparator is connected between the non-inverting terminals of the first diode and the second comparator. The non-inverting terminal of the third comparator is connected to a low level. The output terminals of the second and third comparators are respectively connected to the two input terminals of the fourth OR gate. The output terminal of the fourth OR gate is connected to one input terminal of the fifth OR gate. The output terminal of the fifth OR gate is the active short-circuit signal terminal.

4. The active short-circuit control circuit according to claim 2, characterized in that, The buffer includes a sixth operational amplifier, a second resistor, and a second capacitor. The non-inverting input of the sixth operational amplifier is connected to one end of the second resistor, and the other end of the second resistor is connected to the overvoltage monitoring signal input. The inverting input of the sixth operational amplifier is connected to the output. The output of the sixth operational amplifier is also connected to one end of the third resistor, and the other end of the third resistor is connected to the non-inverting input of the seventh operational amplifier. A fourth resistor is connected between the non-inverting input and the output of the seventh operational amplifier. The inverting input of the seventh operational amplifier is used to set the equivalent threshold voltage. The output of the seventh operational amplifier is connected to the other input of the fifth OR gate, and the output of the fifth OR gate is the active short-circuit signal terminal.

5. An active short-circuit control device, characterized in that, The active short-circuit control device is provided with an active short-circuit control circuit as described in any one of claims 1 to 4.

6. An active short-circuit control method, characterized in that, The active short-circuit control method is implemented based on the active short-circuit control circuit according to any one of claims 1-4; The active short-circuit control method specifically includes: Detect whether there is a fault in the drive module or power module, and send an active short-circuit signal or maintain the original state for normal operation depending on whether a fault exists; Determine whether the bus voltage is over-voltage, and further determine whether the bus voltage has discharged to below the judgment threshold voltage, and send an active short-circuit signal or maintain the original state for normal operation; The microcontroller's operating status is detected, and an active short-circuit signal is sent or the original state is maintained for normal operation.

7. The active short-circuit control method according to claim 6, characterized in that, Specifically, it includes: The system detects whether there is a fault in the drive module or power module. If a fault is found, the drive module sends a fault signal to the microcontroller. After the microcontroller recognizes the fault and reports it to the vehicle, it sends an active short circuit signal to the drive module, and the motor enters an active short circuit safety state. Alternatively, if there is no fault, the system maintains its original state and operates normally. The system determines whether the bus voltage is overvoltage. If the bus voltage is not overvoltage, it maintains its original normal operation. If the bus voltage is overvoltage, the active short-circuit processing module sends an active short-circuit signal to the high-voltage drive circuit and further determines whether the bus voltage has discharged below the turn-off threshold voltage. If the bus voltage has discharged below the turn-off threshold voltage, the active short-circuit processing module stops sending active short-circuit signals. If the bus voltage discharge is not below the turn-off threshold voltage, the active short-circuit processing module continues to send active short-circuit signals. Determine if the microcontroller is working properly. If the microcontroller is working properly, maintain its original state and continue working normally. Or, if the microcontroller is malfunctioning, the active short-circuit processing module sends an active short-circuit signal to the drive high-voltage circuit.

8. An active short-circuit control system, characterized in that, The active short-circuit control system is implemented based on the active short-circuit control circuit according to any one of claims 1-4; The active short-circuit control system specifically includes: The drive / power module fault detection unit is used to detect whether there is a fault in the drive module or power module, and send an active short circuit signal or maintain the original state for normal operation. The bus voltage overvoltage detection unit is used to determine whether the bus voltage is overvoltage, and further determine whether the bus voltage has discharged to below the judgment threshold voltage, and send an active short circuit signal or maintain the original state for normal operation. The microcontroller status detection unit is used to send an active short-circuit signal or maintain the original normal operation based on the microcontroller's operating status.

9. An electronic device, characterized in that, include: The system includes a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other via the communication bus; the memory stores a computer program, which, when executed by the processor, causes the processor to perform the steps of the method described in claim 6 or 7.

10. A computer-readable storage medium, characterized in that, It stores a computer program executable by an electronic device, which, when run on the electronic device, causes the electronic device to perform the steps of the method of claim 6 or 7.

11. A vehicle, characterized in that, The vehicle is equipped with an active short-circuit control system. When the control and drive unit of the vehicle's electric drive system inverter malfunctions, the active short-circuit control system is used to control the motor to enter an active short-circuit state, and also includes: Electronic equipment used to implement active short-circuit control methods; A processor that runs a program that, when the program is running, executes the steps of the active short-circuit control method according to claim 6 or 7 from data output from the electronic device. A storage medium for storing a program that, when run, performs the steps of the active short-circuit control method of claim 6 or 7 on data output from an electronic device.

Images