Motor shutdown control loop and method

Abstract

The application discloses a motor shutdown control loop and method, and belongs to the field of motor safety protection control, and comprises a power supply, a time delay relay, a first switch, a relay and a control device; the control device is provided with a first input end, a second input end and an output end; the output end is connected with a motor; when the power supply connected with the first input end is disconnected, the control device controls the motor to stop; when the power supply connected with the second input end is disconnected, the control device controls the high-voltage power supply of the motor to be disconnected; the first switch is connected in series in the power supply circuit of the first input end; the relay is connected in series in the power supply circuit of the second input end; through the series connection of the time delay relay and the relay coil, when an operator turns off the first switch, the control device sends a shutdown instruction to the motor first, the motor is turned off, and after the time delay relay is disconnected, the control device disconnects the high-voltage power supply of the motor. The application realizes that the motor is turned off before the high-voltage power supply is turned off, and the sudden disconnection of the high-voltage power supply of the motor is avoided, so that the motor is prevented from being damaged.

Description

Technical Field

[0001] This application relates to the field of motor safety protection and control, specifically to a motor shutdown control circuit and method. Background Technology

[0002] With increasingly stringent requirements for energy conservation and emission reduction, electric forklifts, electric stackers, and other transportation machinery are gradually entering the market. The operation of electric vehicles differs somewhat from that of internal combustion engine vehicles. Internal combustion engine vehicles can be directly switched off by turning off the ignition switch, thus shutting off the engine. However, electric vehicles require the motor to be turned off first before the high-voltage power is cut off. If the high-voltage power to the motor is suddenly cut off, it can cause damage. To minimize the impact of these operational differences on operators, this control circuit was designed. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this application proposes a motor shutdown control circuit and method.

[0004] In a first aspect, this application proposes a motor stop control circuit, comprising: a power supply, a time delay relay, a first switch, a relay, and a control device;

[0005] The control device includes a first input terminal, a second input terminal, and an output terminal; the output terminal is connected to the motor, and the control device is used to control the motor to stop when the power supply connected to the first input terminal is disconnected, and to control the high-voltage power supply to the motor to be disconnected when the power supply connected to the second input terminal is disconnected; the positive terminal of the power supply is connected to one end of the first switch, and the other end of the first switch is connected to the first input terminal.

[0006] The positive terminal of the power supply is connected to the first end of the normally open contact of the time delay relay, the second end of the normally open contact of the time delay relay is connected to one end of the relay coil, and the other end of the relay coil is connected to the negative terminal of the power supply.

[0007] The positive terminal of the power supply is connected to the first end of the normally open contact of the relay, and the second end of the normally open contact of the relay is connected to the second input terminal of the control device.

[0008] The other end of the first switch is also connected to one end of the coil of the time delay relay, and the other end of the coil of the time delay relay is connected to the negative terminal of the power supply.

[0009] In a preferred embodiment of this application, a motor stop control circuit further includes: a second switch; the second switch is disposed between the other end of the first switch and the first input terminal, and is connected in series with the first switch and the first input terminal.

[0010] In a preferred embodiment of this application, a motor stop control circuit further includes: a third switch, the control device includes a third input terminal, and the control device realizes motor emergency stop control through the power on / off state of the third input terminal;

[0011] One end of the third switch is connected to the positive terminal of the power supply, and the other end of the third switch is connected to the third input terminal.

[0012] In a preferred embodiment of this application, a motor stop control circuit further includes: a second switch and a third switch, and the control device includes a third input terminal;

[0013] The controller realizes motor emergency stop control through the power on / off state of the third input terminal; the second switch is disposed between the other end of the first switch and the first input terminal, and is connected in series with the first switch and the first input terminal;

[0014] One end of the third switch is connected to the positive terminal of the power supply, and the other end of the third switch is connected to the third input terminal.

[0015] Based on any of the above embodiments, there is also a preferred embodiment, wherein the control device includes: a high-voltage battery system, a vehicle controller, and a motor controller;

[0016] The first input terminal is the input terminal of the vehicle controller, the second input terminal is the input terminal of the high-voltage battery system, the output terminal is the output terminal of the motor controller, the vehicle controller is connected to the motor controller and the high-voltage battery system via communication lines, and the output terminal of the motor controller is connected to the motor.

[0017] In a preferred embodiment of this application, the vehicle controller is provided with a sixth input terminal, and the other end of the first switch is connected to the sixth input terminal; when the sixth input terminal is at a low level, the vehicle controller sends a command to the high-voltage battery system to disconnect the high-voltage power supply to the motor.

[0018] In a preferred embodiment of this application, the vehicle controller further includes a fourth input terminal; the motor controller includes a fifth input terminal; the fourth input terminal and the fifth input terminal are respectively connected to the second terminal of the normally open contact of the relay;

[0019] The second input terminal, the fourth input terminal, and the fifth input terminal are used for the control device to perform a self-test when the power is turned on.

[0020] Secondly, a motor shutdown control method is proposed, implemented using the motor shutdown control loop described in any preferred embodiment of the first aspect, including:

[0021] When the voltage at the first input terminal of the control device is 0, the control device sends a stop command to stop the motor.

[0022] When the voltage at the second input terminal of the control device is 0, the control device sends a command to disconnect the high-voltage power supply, causing the high-voltage power supply to the motor to be disconnected.

[0023] Thirdly, an electronic device is proposed, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the motor stop control method described in the second aspect.

[0024] Fourthly, a computer-readable storage medium is proposed, on which a computer program is stored, which, when executed by a processor, implements the motor shutdown control method described in the second aspect.

[0025] The beneficial effects of the technical solutions provided in some embodiments of this application include at least the following:

[0026] This application provides a motor shutdown control circuit and method, including: a power supply, a time-delay relay, a first switch, a relay, and a control device; the control device has a first input terminal, a second input terminal, and an output terminal; the output terminal is connected to the motor. The control device is used to control the motor to stop when the power supply connected to the first input terminal is disconnected, and to control the disconnection of the high-voltage power supply to the motor when the power supply connected to the second input terminal is disconnected. This application connects the first switch in series to the power supply circuit of the first input terminal, and the relay in series to the power supply circuit of the second input terminal. Through the series connection of the time-delay relay and the relay coil, when the operator closes the first switch, the control device first sends a stop command to the motor, the motor stops, and after the time-delay relay is disconnected, the control device disconnects the high-voltage power supply to the motor. This application enables the motor to shut down before the high voltage is cut off, avoiding damage to the motor caused by a sudden loss of high voltage power.

[0027] Other features and advantages of this application will be set forth in the following description and will be apparent in part from the description or may be learned by practicing the application. The objectives and other advantages of this application are realized and obtained through the structures particularly pointed out in the description, claims and drawings.

[0028] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings.

[0029] The advantages of this application in terms of its additional aspects will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0030] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments of this application or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of a motor safety stop control circuit as shown in a specific example in the embodiments of this application;

[0032] Figure 2 This is a block diagram illustrating the principle of the motor shutdown control method shown in the embodiments of this application;

[0033] In the diagram: 1-Power supply; 2-Fuse; 3-First switch; 4-Time delay relay; 5-Relay; 6-Third switch; 7-Second switch; 8-Vehicle controller; 9-High voltage battery system; 10-Motor controller; 11-Motor; 12-Communication line; 13-Battery cable; 14-Motor cable. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0035] In the following description, when referring to the accompanying drawings, the same numbers in different drawings denote the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of methods and apparatus consistent with some aspects of this application as detailed in the appended claims.

[0036] In the description of this application, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, in the description of this application, unless otherwise stated, "multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship.

[0037] Example 1

[0038] This application proposes a motor stop control circuit, including: a power supply, a time delay relay, a first switch, a relay, and a control device;

[0039] The control device is provided with a first input terminal, a second input terminal, and an output terminal; the output terminal is connected to the motor; the control device is used to control the motor to stop when the power supply connected to the first input terminal is disconnected, and to control the high-voltage power supply to the motor to be disconnected when the power supply connected to the second input terminal is disconnected; the positive terminal of the power supply is connected to one end of the first switch, and the other end of the first switch is connected to the first input terminal.

[0040] The positive terminal of the power supply is connected to the first end of the normally open contact of the time delay relay, the second end of the normally open contact of the time delay relay is connected to one end of the relay coil, and the other end of the relay coil is connected to the negative terminal of the power supply.

[0041] The positive terminal of the power supply is connected to the first end of the normally open contact of the relay, and the second end of the normally open contact of the relay is connected to the second input terminal of the control device.

[0042] The other end of the first switch is also connected to one end of the coil of the time delay relay, and the other end of the coil of the time delay relay is connected to the negative terminal of the power supply.

[0043] The implementation principle of this embodiment is as follows: By connecting one end of the first switch to the positive terminal of the power supply and the other end to the first input terminal of the control device, when the first switch connected to the positive terminal of the power supply is disconnected from the first input terminal, the control device sends a stop signal to the motor; one end of the coil of the time delay relay is connected to the other end of the first switch, and the other end of the coil of the time delay relay is connected to the negative terminal of the power supply; when the first switch is opened, the coil of the time delay relay is de-energized, and the time delay relay is opened after a delay of 6 seconds.

[0044] By connecting one end of the relay coil to the second terminal of the normally open contact of the time delay relay, and the other end of the relay coil to the negative terminal of the power supply, connecting the first terminal of the normally open contact of the time delay relay and the first terminal of the normally open contact of the relay to the positive terminal of the power supply respectively, and connecting the second terminal of the normally open contact of the relay to the second input point of the control device, when the first switch is opened, the power supply to the second input point of the control device is delayed and then disconnected, thereby disconnecting the high voltage power supply to the motor.

[0045] In one possible implementation, the motor stop control circuit further includes: a second switch; the second switch is disposed between the other end of the first switch and the first input terminal, and is connected in series with the first switch and the first input terminal.

[0046] Understandably, the second switch functions differently from the first switch. First, when the second switch operates alone, if the first switch is closed, the high-voltage power supply to the motor remains in place. The second switch can only disconnect the power supply to the first input terminal of the control device, thus stopping the motor, but it cannot reduce the high voltage on the motor. Second, the state of the second switch does not affect the function of the first switch in reducing the high voltage on the motor. Regardless of whether the second switch is open or closed, the first switch, the time-delay relay, the relay circuit, and the second input terminal of the control device form a separate connection circuit, and can independently control the motor to reduce the high voltage for a delay. The difference lies in the fact that when the second switch is closed, the stop command from the control device to the motor is equivalent to being triggered by the first switch.

[0047] In one possible implementation, the motor stop control circuit further includes: a third switch, the control device is provided with a third input terminal, and the control device realizes motor emergency stop control through the power on / off state of the third input terminal;

[0048] One end of the third switch is connected to the positive terminal of the power supply, and the other end of the third switch is connected to the third input terminal.

[0049] Specifically in this embodiment, the third switch is set as an emergency stop switch. By operating the emergency stop switch alone, the motor can be stopped immediately, and the high voltage is immediately cut off after the motor stops (approximately 2 seconds).

[0050] In one possible implementation, a motor stop control circuit further includes: a second switch and a third switch, and the control device is provided with a third input terminal;

[0051] The controller realizes motor emergency stop control through the power on / off state of the third input terminal; the second switch is disposed between the other end of the first switch and the first input terminal, and is connected in series with the first switch and the first input terminal;

[0052] One end of the third switch is connected to the positive terminal of the power supply, and the other end of the third switch is connected to the third input terminal.

[0053] Specifically, in this embodiment, the emergency stop control of the motor can be achieved by using the third switch as an emergency stop switch, and the motor start-stop control under high voltage holding state can be achieved by using the second switch, which improves the flexibility of the application scenario. In this case, the second switch is only used as a motor start-stop button.

[0054] Based on any of the above embodiments, there is another possible embodiment in which the control device includes: a high-voltage battery system, a vehicle controller, and a motor controller;

[0055] The first input terminal is the input terminal of the vehicle controller, the second input terminal is the input terminal of the high-voltage battery system, the output terminal is the output terminal of the motor controller, the vehicle controller is connected to the motor controller and the high-voltage battery system via communication lines, and the output terminal of the motor controller is connected to the motor.

[0056] In one possible implementation, the vehicle controller is provided with a sixth input terminal, and the other end of the first switch is connected to the sixth input terminal; when the sixth input terminal is at a low level, the vehicle controller sends a command to the high-voltage battery system to disconnect the high-voltage power supply to the motor.

[0057] It is understandable that the vehicle controller also communicates with the high-voltage battery system to ensure that the vehicle controller sends CAN messages to the high-voltage battery system to cut off the high-voltage power supply to the motor when necessary. This circuit is different from the high-voltage power supply scheme that controls the motor through the power on / off of the second input terminal. This circuit exists as a separate circuit and is a backup supplement to the previous scheme. The high-voltage power supply to the motor can be reduced through the vehicle controller's built-in program at a preset time to ensure the fastest response of the high-voltage battery system in an emergency. The high-voltage power supply scheme that controls the motor through the power on / off of the second input terminal is a backup last resort, which increases the stability and reliability of the entire machine's safe shutdown.

[0058] In one possible implementation, the vehicle controller further includes a fourth input terminal; the motor controller includes a fifth input terminal; the fourth input terminal and the fifth input terminal are respectively connected to the second terminal of the normally open contact of the relay;

[0059] The second input terminal, the fourth input terminal, and the fifth input terminal are used for the control device to perform a self-test when the power is turned on.

[0060] Specifically, when the power is turned on, the vehicle controller, motor controller, and high-voltage battery system are powered by low voltage, and the vehicle controller, motor controller, and high-voltage battery system start a self-test.

[0061] This application provides a motor shutdown control circuit. The operator can control the motor to shut down preferentially via a separately configured motor start / stop control button. An emergency stop switch enables priority motor shutdown in emergency situations. When the driver directly turns off the vehicle key, the time-delay relay de-energizes after a delay, while the controller continues to operate. When the motor start / stop button loses power, the controller sends a stop command to the motor, and the motor shuts down. After the time-delay relay disconnects, the battery system is de-energized. This invention's control process ensures that the motor shuts down before the high-voltage power is de-energized, preventing damage to the motor from a sudden loss of high-voltage power.

[0062] The invention will now be described in more detail with reference to the accompanying drawings and specific examples:

[0063] See Figure 1 The control circuit of the present invention is shown in the figure, wherein power supply 1, in this example, is specifically a storage battery that provides low-voltage power.

[0064] The first switch 3, in this example, is specifically a key switch;

[0065] The time-delay relay 4 serves as a power-off delay function; in this example, the power-off delay time is specifically 6 seconds.

[0066] Relay 5, specifically a power relay in this example;

[0067] The third switch, 6, is specifically a self-locking emergency stop switch in this example, using a set of normally closed contacts.

[0068] When the contact is disconnected, the motor stops.

[0069] The second switch 7, in this example, is a motor start / stop button. It is a self-locking button type and uses a set of normally open contacts. When closed, it controls the motor to start, and when open, it controls the motor to stop.

[0070] High-voltage battery system 9 provides power for motor drive; vehicle controller 8 is the vehicle controller.

[0071] Motor controller 10 controls the start and stop of the motor;

[0072] The high-voltage battery system 9, the vehicle controller 8, and the motor controller 10 constitute the control device in Embodiment 1.

[0073] The details are as follows:

[0074] The positive terminal of power supply 1 is connected to one end of fuse 2, and the other end of fuse 2 is connected to one end of the normally open contact of time delay relay 4, one end of the normally open contact of relay 5, one end of the first switch 3, and one end of the third switch 6.

[0075] The other end of the first switch 3 is connected to one end of the coil of the time delay relay 4, the d pin of the vehicle controller, and one end of the second switch 7; the other end of the third switch 6 is connected to the a pin of the vehicle controller 8; the other end of the second switch 7 is connected to the b pin of the vehicle controller 8; the other end of the normally open contact of the relay 5 is connected to the c pin of the vehicle controller 8, the a2 pin of the high-voltage battery system 9, and the a1 pin of the motor controller 10.

[0076] The other end of the normally open contact of the time delay relay 4 is connected to one end of the coil of the relay 5; the negative terminal of the power supply 1 is connected to the other end of the coil of the time delay relay 4 and the other end of the coil of the relay 5.

[0077] The high-voltage battery system 9 is connected to the motor controller 10 via battery cable 13, providing driving power; the motor controller 10 is connected to the motor 11 via motor cable 14, driving the motor. The vehicle controller 8 is connected to the motor controller 10 and the high-voltage battery system 9 via communication line 12 to realize information exchange (only the necessary parts of the communication line are shown in this figure).

[0078] The specific work process is as follows:

[0079] 1) When the first switch 3 is closed, the coils of the time delay relay 4 and relay 5 are energized, and low voltage is applied to pin 8c of the vehicle controller, pin 9a2 of the high voltage battery system, and pin 10a1 of the motor controller, and the system performs a self-test.

[0080] 2) When the system self-test is fault-free, the vehicle controller 8 sends a high-voltage power-on command to the high-voltage battery system 9. The high-voltage battery system 9 completes the high-voltage power-on process. Alternatively, the vehicle controller 8 sends a high-voltage power-off command to the high-voltage battery system 9, or the high-voltage battery system 9 loses power at pin a2, and the high-voltage battery system 9 performs the high-voltage power-off process.

[0081] 3) After the high-voltage battery system 9 is powered on, press the second switch 7. The normally open contact will close, and the vehicle controller 8 will send a motor start command to the motor controller 10, and the motor will start.

[0082] 4) In case of emergency, the driver presses the third switch 6, the normally closed contact of the switch becomes open, the vehicle controller 8 sends a motor stop command to the motor controller 10, the motor stops, and 2 seconds later the vehicle controller 8 sends a high voltage reduction command to the high voltage battery system 9, so that the high voltage of the motor is reduced.

[0083] 5) When the driver does not pay attention and directly disconnects the first switch 3, the contact of the time-delay relay 4 remains closed (it will open after 6 seconds), the normally closed contact of the relay 5 remains closed, and the vehicle controller 8, high-voltage battery system 9, motor controller 10 and other devices continue to work; when the first switch 3 is disconnected, the vehicle controller's d-pin and the second switch 7 lose power simultaneously, the vehicle controller 8 sends a motor stop command to the motor controller 10, and the motor stops; and after 3 seconds, the vehicle controller 8 sends a high-voltage power reduction command to the high-voltage battery system 9, and the motor loses high voltage power. If the signal at the vehicle controller's d-pin fails, because the time-delay relay 4 is de-energized after 6 seconds, the high-voltage battery system 9 control module a2 pin loses power, which will cause the high-voltage battery system 9 control part to lose power, thus disconnecting the battery high-voltage output and causing the motor to lose high voltage power, ensuring that the motor stops before the high-voltage power is reduced.

[0084] As can be seen from the above process, the motor shutdown control method is mainly based on the following steps:

[0085] S100: The b pin of the vehicle controller 8 connected to the second switch 7 is de-energized. The vehicle controller 8 sends a motor stop command to the motor controller 10, and the motor stops.

[0086] S200: The vehicle controller 8 sends a high-voltage power-down command to the high-voltage battery system 9 or the high-voltage battery system 9 loses power at pin a2, and the high-voltage battery system 9 executes the high-voltage power-down command.

[0087] As can be seen from the above examples and specific operation process, it is obvious that in this example, pin b of vehicle controller 8 is equivalent to the first input terminal of the control device in the embodiment, pin 2 of high voltage battery system 9a is equivalent to the second input terminal of the control device in the embodiment, pin a of vehicle controller 8 is equivalent to the third input terminal of the control device in the embodiment, pin c of vehicle controller 8 is equivalent to the fourth input terminal in the embodiment, pin 10a1 of motor controller is equivalent to the fifth input terminal in the embodiment, and pin d of vehicle controller 8 is equivalent to the sixth input terminal in the embodiment.

[0088] Regardless of the operating conditions, this control circuit can ensure that the motor stops first and then the high-voltage power supply is disconnected, which can avoid the shock caused by the motor suddenly stopping due to sudden loss of power.

[0089] Example 2

[0090] A motor shutdown control method is proposed, which is implemented using any possible motor shutdown control loop in Embodiment 1, such as... Figure 2 As shown, the steps are as follows:

[0091] Step S1: When the voltage at the first input terminal of the control device is 0, the control device sends a stop command to stop the motor;

[0092] Step S2: When the voltage at the second input terminal of the control device is 0, the control device sends a command to disconnect the high-voltage power supply, causing the high-voltage power supply to the motor to be disconnected.

[0093] It is understood that, in the specific implementation process, when the voltage of the first input terminal of the control device is 0, the circuit from the first input terminal to the power supply is usually cut off to make the voltage of the first input terminal of the control device 0; the circuit from the second input terminal to the power supply circuit is cut off to make the voltage of the second input terminal of the control device 0; the specific process is as illustrated in the motor stop control method in Embodiment 1.

[0094] Example 3

[0095] An electronic device is proposed, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, it implements the steps of the motor stop control method described in Embodiment 2.

[0096] The electronic device may be a mobile phone, computer, or tablet computer, etc., and includes a memory and a processor. The memory stores a computer program, which, when executed by the processor, implements the motor stop control method as described in the embodiment. It is understood that the electronic device may also include an input / output (I / O) interface and communication components.

[0097] The processor is used to execute all or part of the steps in the motor stop control method as described in the above embodiments. The memory is used to store various types of data, which may include, for example, instructions for any application or method in the electronic device, as well as application-related data.

[0098] The processor can be implemented as an Application Specific Integrated Circuit (ASIC), Digital Signal Processor (DSP), Programmable Logic Device (PLD), Field Programmable Gate Array (FPGA), controller, microcontroller, microprocessor, or other electronic components, and is used to execute the motor stop control method in Embodiment 2.

[0099] Example 4

[0100] A computer-readable storage medium is proposed, on which a computer program is stored, which, when executed by a processor, implements the steps of the motor stop control method described in Embodiment 2.

[0101] The computer program product of the motor stop control method provided in this embodiment of the invention includes a computer-readable storage medium storing non-volatile program code executable by a processor. The instructions included in the program code can be used to execute the method described in Embodiment 2. For specific implementation, please refer to the method embodiment, which will not be repeated here.

[0102] In the various embodiments of this application, the functional units can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. If the functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium.

[0103] Based on this understanding, the technical solution of this application, or the part that contributes to the prior art, or part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the motor stop control method described in the various embodiments of this application.

[0104] The aforementioned storage media include: flash memory, hard disk, multimedia card, card-type memory (e.g., SD (Secure Digital Memory Card) or DX (Memory Data Register, MDR) memory, random access memory (RAM), static random access memory (SRAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), programmable read-only memory (PROM), magnetic storage, disk, optical disk, server, APP (Application) application store, and other media capable of storing program code, on which computer programs are stored. When the computer program is executed by the processor, it can implement the various steps of the motor stop control method.

[0105] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, units, and processes described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0106] In the embodiments provided by this invention, it should be understood that the disclosed systems, methods, and approaches can be implemented in other ways. The system embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. Furthermore, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Additionally, the shown or discussed mutual couplings, direct couplings, or communication connections may be through some communication interfaces; indirect couplings or communication connections between systems or units may be electrical, mechanical, or other forms.

[0107] 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 units can be selected to achieve the purpose of this embodiment according to actual needs.

[0108] In addition, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0109] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a processor-executable, non-volatile, 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 portion 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 for causing 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.

[0110] It should be noted that the flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of the present 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 the block diagrams and / or flowcharts, and combinations of blocks in the 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.

[0111] Finally, it should be noted that the above-described embodiments are merely specific implementations of the present invention, used to illustrate the technical solutions of the present invention, and not to limit it. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the technical scope disclosed in the present invention, or make equivalent substitutions for some of the technical features; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

[0112] The applicant has provided a detailed description of the implementation examples of this application in conjunction with the accompanying drawings. However, those skilled in the art should understand that the above implementation examples are merely preferred embodiments of this application. The detailed description is only intended to help readers better understand the spirit of this application and is not intended to limit the scope of protection of this application. On the contrary, any improvements or modifications made based on the inventive spirit of this application should fall within the scope of protection of this application.

Claims

1. A motor stop control circuit, characterized in that, include: Power supply, time delay relay, first switch, relay, control device; The control device is provided with a first input terminal, a second input terminal, and an output terminal; The output terminal is connected to the motor. The control device is used to control the motor to stop when the power supply connected to the first input terminal is disconnected, and to control the high-voltage power supply to the motor to be disconnected when the power supply connected to the second input terminal is disconnected. The positive terminal of the power supply is connected to one end of the first switch, and the other end of the first switch is connected to the first input terminal. The positive terminal of the power supply is connected to the first end of the normally open contact of the time delay relay, the second end of the normally open contact of the time delay relay is connected to one end of the relay coil, and the other end of the relay coil is connected to the negative terminal of the power supply. The positive terminal of the power supply is connected to the first end of the normally open contact of the relay, and the second end of the normally open contact of the relay is connected to the second input terminal of the control device. The other end of the first switch is also connected to one end of the coil of the time delay relay, and the other end of the coil of the time delay relay is connected to the negative terminal of the power supply. The control device includes: a high-voltage battery system, a vehicle controller, and a motor controller; The first input terminal is the input terminal of the vehicle controller, the second input terminal is the input terminal of the high-voltage battery system, the output terminal is the output terminal of the motor controller, the vehicle controller is connected to the motor controller and the high-voltage battery system via communication lines, and the output terminal of the motor controller is connected to the motor. The vehicle controller is used to send a stop command to the motor controller to control the motor to stop when the power supply connected to the first input terminal is disconnected; the high-voltage battery system is used to cut off the high-voltage power supply to the motor when the power supply connected to the second input terminal is disconnected. The vehicle controller is provided with a sixth input terminal, and the other end of the first switch is connected to the sixth input terminal; when the sixth input terminal is at a low level, the vehicle controller sends a command to the high-voltage battery system to disconnect the high-voltage power supply to the motor.

2. The motor stop control circuit according to claim 1, characterized in that, Also includes: The second switch is located between the other end of the first switch and the first input terminal, and is connected in series with the first switch and the first input terminal.

3. The motor stop control circuit according to claim 1, characterized in that, Also includes: The third switch, the control device is provided with a third input terminal, and the control device realizes the emergency stop control of the motor through the power on / off state of the third input terminal; One end of the third switch is connected to the positive terminal of the power supply, and the other end of the third switch is connected to the third input terminal.

4. The motor stop control circuit according to claim 1, characterized in that, Also includes: The second switch and the third switch are provided, and the control device is equipped with a third input terminal; The control device realizes motor emergency stop control through the power on / off state of the third input terminal; the second switch is disposed between the other end of the first switch and the first input terminal, and is connected in series with the first switch and the first input terminal; One end of the third switch is connected to the positive terminal of the power supply, and the other end of the third switch is connected to the third input terminal.

5. The motor stop control circuit according to claim 1, characterized in that, The vehicle controller is further provided with a fourth input terminal; the motor controller is provided with a fifth input terminal; the fourth input terminal and the fifth input terminal are respectively connected to the second terminal of the normally open contact of the relay; The second input terminal, the fourth input terminal, and the fifth input terminal are used for the control device to perform a self-test when the power is turned on.

6. A method for controlling motor shutdown, characterized in that, Implemented using the motor stop control circuit according to any one of claims 1 to 5, comprising: When the voltage at the first input terminal of the control device is 0, the control device sends a stop command to stop the motor. When the voltage at the second input terminal of the control device is 0, the control device sends a command to disconnect the high-voltage power supply, causing the high-voltage power supply to the motor to be disconnected.

7. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the motor shutdown control method as described in claim 6.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the method for controlling the motor stop as described in claim 6.

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