Automobile intelligent motor driving system and electronic control device thereof

Abstract

The embodiment of the utility model provides an automobile intelligent motor driving system and an electronic control device thereof, the electronic control device is used for controlling the working state of a driving motor, and the electronic control device comprises a signal generation module; a motor driving module; an SPI (Serial Peripheral Interface) communication connection is also established between the two controllers; wherein the two controllers and the motor driving module are configured as follows: the two controllers synchronously send the same first control instruction to the motor driving module according to the control requirement when monitoring that the two controllers work normally, and the controllers disconnect control from the motor driving module when working abnormally; only the normally working controller sends a second control instruction to the motor driving module; and the motor driving module controls the driving motor to act correspondingly when receiving the two same first control instructions or one second control instruction. According to the embodiment, the two controllers can be used for coordinating work, the stability and reliability of the intelligent motor driving system can be guaranteed, and emergency processing can be carried out in the abnormal state.

Description

Technical Field

[0001] The embodiment of the utility model relates to the technical field of automobile intelligent motor control, and in particular to an automobile intelligent motor drive system and an electronic control device thereof. Background Art

[0002] At present, there are a large number of working parts on the car that are driven by the drive motor. Taking the car shifter and handbrake as examples, they are connected to the corresponding parts of the car by mechanical cables. The driver drives the mechanical cable to move by operating the lever (the shifter corresponds to the shift lever, and the handbrake corresponds to the brake handle), thereby achieving gear shifting or handbrake braking; however, the manual operation of the lever is relatively inefficient. For this reason, more and more cars will upgrade the transmission mechanical shift system and handbrake system to electronic automatic shift system and electronic automatic parking brake system. The electronic automatic shift system can automatically switch gears based on the driver's manual input or the body data transmitted in the car's CAN bus, while the electronic automatic parking brake system can realize the automatic handbrake function.

[0003] However, the inventors found in the actual implementation that the traditional electronic automatic shift system and electronic automatic parking brake system currently on the market use a single controller to independently control the operation of the drive motor. When the controller fails, it will cause the system to be paralyzed, affecting safety and stability. Utility Model Content

[0004] The technical problem to be solved by the embodiments of the utility model is to provide an electronic control device for an automobile intelligent motor drive system, which can effectively improve the safety of control.

[0005] A further technical problem to be solved by the embodiments of the present invention is to provide an automotive intelligent motor drive system that can effectively improve control safety.

[0006] In order to solve the above technical problems, the embodiment of the utility model provides the following technical solutions: an electronic control device of an intelligent motor drive system for an automobile, used for controlling the working state of a drive motor, comprising:

[0007] A signal generation module for generating a motor control signal;

[0008] A motor drive module for connecting to the drive motor to control the working state of the drive motor in response to corresponding instructions; and

[0009] Two controllers are connected to the signal generating module and the motor driving module, and an SPI communication connection is established between the two controllers to monitor each other's working status;

[0010] Among them, the two controllers and the motor drive module are configured as follows: when the two controllers monitor each other and find that they are working normally, they synchronously send the same first control instruction to the motor drive module according to the motor control signal; when the two controllers monitor each other and find that one of the controllers is working abnormally and disconnects from the motor drive module, only the normally working controller sends the second control instruction to the motor drive module according to the motor control signal; when the motor drive module receives two identical first control instructions issued by the two controllers respectively or receives one second control instruction at the same time, it controls the corresponding action of the drive motor.

[0011] Furthermore, the signal generating module comprises: a human-machine interaction unit for being operated by a user to generate the motor control signal, and both of the two controllers are connected to the human-machine interaction unit.

[0012] Furthermore, the signal generating module also includes: a CAN processor connected to the CAN bus of the automobile and used to generate the motor control signal according to the vehicle body data transmitted in the CAN bus, and at least one of the controllers is connected to the CAN processor.

[0013] Furthermore, the electronic control device includes two motor drive modules respectively used to connect to and drive different drive motors, and each of the motor drive modules is respectively connected to the two controllers.

[0014] Furthermore, one of the controllers is a main controller, which is also connected to a Hall sensor inside the drive motor. The main controller is also used to receive motor current feedback data sent by the motor drive module and motor Hall feedback data fed back by the Hall sensor, respectively, and perform closed-loop control of the motor drive module based on the motor current feedback data and the motor Hall feedback data.

[0015] Furthermore, the electronic control device also includes:

[0016] An alarm is connected to the main controller so that the main controller can control an alarm when at least one of the controllers fails.

[0017] Furthermore, the two controllers are also connected to each other by transmission circuits to receive the in-position signal sent from the hard-wire signal transmission circuit, and generate corresponding in-position instructions according to the in-position signal, wherein the in-position signal is generated when a micro switch installed at the end of the rotation stroke of the output shaft of the drive motor is pressed and triggered by the output shaft of the drive motor rotating by a predetermined angle and input into the hard-wire signal transmission circuit; the electronic control device also includes:

[0018] A display module is connected to the two controllers and is used for responding to the in-place instruction and displaying corresponding in-place information.

[0019] Furthermore, the electronic control device also includes:

[0020] The card reading module is connected to the main controller and is used for inserting an external memory card to read the upgrade data in the external memory card to perform data upgrade on the two controllers.

[0021] Furthermore, the electronic control device also includes:

[0022] The power conversion module is connected to the on-board power supply of the automobile and is used to convert the initial voltage output by the on-board power supply into a predetermined working voltage to supply power to each power-consuming module of the electronic control device and the drive motor.

[0023] On the other hand, in order to solve the above-mentioned further technical problems, the embodiments of the utility model further provide the following technical solutions: An automobile intelligent motor drive system, comprising a drive motor connected to a working part of the automobile to drive the movement of the working part and an electronic control device connected to the drive motor for controlling the working state of the drive motor, wherein the electronic control device is the above-mentioned electronic control device.

[0024] After adopting the above technical scheme, the embodiment of the utility model has at least the following beneficial effects: the embodiment of the utility model generates a motor control signal through a signal generating module, and adopts two controllers to collaboratively control the motor driving module to drive the driving motor. In specific work, the two controllers establish an SPI communication connection to monitor each other's working status. When the two controllers are working normally, the two controllers send a first control instruction to the motor driving module, so that the motor driving module needs to synchronously respond to the first control instruction sent by the two controllers to realize the corresponding driving of the driving motor; and when a controller fails to work, the controller that can work normally at this time can independently send a second control instruction to the motor driving module to independently control the motor driving module to realize the corresponding driving of the driving motor, thereby realizing independent control of the driving motor, and the system reliability is high, which avoids the risk of system paralysis caused by controller failure when only a single controller is used. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The schematic diagram is a functional block diagram of an optional embodiment of the intelligent motor drive system for an automobile of the utility model. DETAILED DESCRIPTION

[0026] The present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following illustrative embodiments and descriptions are only used to explain the present invention and are not intended to limit the present invention. In addition, the embodiments and features in the embodiments of the present application may be combined with each other without conflict.

[0027] like Figure 1 As shown, an optional embodiment of the utility model provides an electronic control device 1 of an intelligent motor drive system for an automobile, which is used to control the working state of a drive motor 3, including:

[0028] A signal generating module 10 for generating a motor control signal;

[0029] A motor driving module 12 for connecting to the driving motor 3 to control the working state of the driving motor in response to corresponding instructions; and

[0030] Two controllers 14 are connected to the signal generating module 10 and the motor driving module 12, and an SPI communication connection is established between the two controllers 14 to monitor each other's working status;

[0031] Among them, the two controllers 14 and the motor drive module 12 are configured as follows: when the two controllers 14 monitor each other and find that they are working normally, they synchronously send the same first control instruction to the motor drive module 12 according to the motor control signal; when the two controllers 14 monitor each other and find that one of the controllers 14 is working abnormally and disconnects from the motor drive module 12, only the normally working controller 14 sends the second control instruction to the motor drive module 12 according to the motor control signal; when the motor drive module 12 receives two identical first control instructions issued by the two controllers 14 respectively or receives one second control instruction at the same time, it controls the corresponding action of the drive motor 3.

[0032] The embodiment of the utility model generates a motor control signal through a signal generating module 10, and adopts two controllers 14 to collaboratively control a motor driving module 12 to drive the driving motor 3. In specific operation, the two controllers establish an SPI communication connection so as to monitor each other's working status. When the two controllers 14 are working normally, the two controllers 14 send a first control instruction to the motor driving module 12, so that the motor driving module 12 needs to synchronously respond to the first control instruction sent by the two controllers 14 to realize the corresponding driving of the driving motor 3; and when a certain controller 14 fails to work, the controller 14 that can work normally at this time can independently send a second control instruction to the motor driving module 12 to independently control the motor driving module 12 to realize the corresponding driving of the driving motor 3, thereby realizing independent control of the driving motor 3, and having high system reliability, avoiding the risk of system paralysis caused by the failure of the controller 14 when only a single controller 14 is used.

[0033] In a specific implementation, the abnormal operation of the controller 14 may include abnormal conduction, failure to start, failure to control, etc.; it can be understood that the abnormal operation of the controller 14 and the disconnection from the motor drive module 12 means that the signal communication between the two is interrupted but the physical circuit is not disconnected; in addition, the two controllers 14 usually monitor each other's working status based on the SPI communication connection when the system is powered on and started, and the first control instruction can be the same instruction as the second control instruction, or it can be a different instruction; when the two instructions are the same, one of the controllers 14 (usually the main controller 14a) is used to control the drive current output by the motor drive module 12, and the other controller 14 is used to control the start and stop of the motor drive module 12, so that the two controllers 14 share The controller 14 controls the start and stop of the motor drive module 12 in the same manner as controlling the operation of the motor drive module 12: by outputting a low level to the enable pin of the motor drive module 12 to keep it in a closed state; when the controller 14 stops outputting a low level to the enable pin (outputs a high level or does not output a level), the motor drive module 12 can be controlled by the main controller 14a to output a drive current; similarly, when a fault occurs in the controller 14, the controller 14 also stops outputting a low level to the enable pin, so that the enable pin of the motor drive module 12 is in a suspended state (i.e., disconnected state), and the motor drive module 12 can normally output a drive current under the independent control of the main controller 14a; and when the two instructions are different, there is no need to distinguish between the primary and secondary controllers 14.

[0034] In an optional embodiment of the present invention, Figure 1 As shown, the signal generating module 10 includes:

[0035] A human-machine interaction unit 101 for user operation to generate the motor control signal, and both controllers 14 are connected to the human-machine interaction unit 101. In this embodiment, the motor control signal can be generated manually through the human-machine interaction unit 101 to achieve manual control of the mechanical cable. In specific implementations, the human-machine interaction unit 101 can be implemented in many ways, such as various types of buttons (such as: button type, knob type, lever type), touch screen, etc.

[0036] In an optional embodiment of the present invention, Figure 1 As shown, the signal generating module 10 further includes:

[0037] A CAN processor 103 is connected to the CAN bus A of the automobile and is used to generate the motor control signal according to the vehicle body data transmitted in the CAN bus A. At least one of the controllers 14 is connected to the CAN processor.

[0038] In this embodiment, the CAN processor 103 may also automatically obtain the vehicle body data from the CAN bus A of the vehicle to realize automatic control of the mechanical cable.

[0039] In an optional embodiment of the present invention, the electronic control device 1 includes two motor drive modules 12 respectively used to connect and drive different drive motors 3, and each motor drive module 12 is respectively connected to two controllers 14. In this embodiment, when the automobile intelligent motor drive system of the embodiment of the present invention is applied to an automobile handbrake, the mechanical cable of the automobile handbrake usually requires two drive motors 3 to drive. For this reason, the present embodiment provides two motor drive modules 12 to drive one drive motor 3 respectively.

[0040] In an optional embodiment of the present invention, Figure 1 As shown, one of the controllers 14 is a main controller 14a, and the main controller 14 is also connected to the Hall sensor 30 inside the drive motor 3. The main controller 14a is also used to receive the motor current feedback data sent by the motor drive module 12 and the motor Hall feedback data fed back by the Hall sensor 30, and perform closed-loop control on the motor drive module 12 according to the motor current feedback data and the motor Hall feedback data. In this embodiment, the main controller 14a is also connected to the Hall sensor 30 inside the drive motor 3, and feedback regulation is performed on the drive current output by the motor drive module 12 based on the motor current feedback data sent by the motor drive module 12 and the motor Hall feedback data fed back by the Hall sensor 30, so as to improve the accuracy of control and realize closed-loop intelligent control.

[0041] In an optional embodiment of the present invention, Figure 1As shown, the electronic control device 1 further includes:

[0042] The alarm 16 is connected to the main controller 14a so that the main controller 14 can control the alarm when at least one of the controllers 14 fails. In this embodiment, the alarm 16 is also provided to implement an alarm when the controller 14 fails, effectively reminding the driver. In the specific implementation, there are many implementation methods of the alarm 16, such as: a buzzer, a light alarm, or an acousto-optic integrated alarm.

[0043] In an optional embodiment of the present invention, Figure 1 As shown, the two controllers 14 are also respectively connected to the hard-wire signal transmission circuit B of the vehicle to receive the in-position signal sent from the hard-wire signal transmission circuit B, and generate corresponding in-position instructions according to the in-position signal, wherein the in-position signal is generated when the micro switch C installed at the end of the rotation stroke of the output shaft of the drive motor 3 is pressed and triggered by the output shaft of the drive motor 3 rotating by a predetermined angle and input to the hard-wire signal transmission circuit B; the electronic control device 1 also includes:

[0044] The display module 17 is connected to the two controllers 14 and is used for displaying corresponding arrival information in response to the arrival instruction.

[0045] In this embodiment, the controller 14 is also connected to the hard-wire signal transmission circuit B of the car. When the micro switch C installed at the predetermined position beside the output shaft of the drive motor 3 is pressed and triggered, it indicates that the output shaft of the drive motor 3 rotates by a predetermined angle. By presetting the output shaft to rotate by a predetermined angle, the mechanical cable moves a predetermined stroke to reach the corresponding gear position, so that the display module 17 displays the corresponding in-place information, so that the driver can accurately know the current gear position information. In a specific implementation, when applied to a shifter, the micro switch C is triggered when it is in the P gear; in addition, there are many implementation methods of the display module 17, such as: LED display lights, display screens, etc.; in addition, the controller 14 can also obtain the gear position signal of the motor vehicle, the ACC power-on signal, etc. from the hard-wire signal transmission circuit B to assist the vehicle body data to achieve precise control of the motor drive module 12.

[0046] In an optional embodiment of the present invention, Figure 1 As shown, the electronic control device 1 further includes:

[0047] The card reader module 18 is connected to the main controller 14 and is used for inserting an external memory card to read the upgrade data in the external memory card to upgrade the data of the two controllers 14. In this embodiment, the card reader module 18 is also provided to facilitate data upgrade of the controller 14 by inserting an external memory card.

[0048] In an optional embodiment of the present invention, Figure 1 As shown, the electronic control device 1 further includes:

[0049] The power conversion module 19 is connected to the vehicle power supply D of the vehicle, and is used to convert the initial voltage output by the vehicle power supply D into a predetermined working voltage to supply power to each power module of the electronic control device 1 and the drive motor 3. In this embodiment, the power conversion module 19 is also provided to facilitate the power supply of each power module of the electronic control device 1 and the drive motor 3.

[0050] On the other hand, the embodiment of the utility model further provides an automobile intelligent motor drive system, including a drive motor 3 connected to a working part of the automobile to drive the working part and an electronic control device connected to the drive motor 3 for controlling the working state of the drive motor 3, wherein the electronic control device 1 is the above-mentioned electronic control device. In this embodiment, the automobile intelligent motor drive system adopts the above-mentioned electronic control device 1, which can upgrade and transform the mechanical cable shifter or mechanical handbrake of the existing stock automobiles, and ensure the safety of control.

[0051] In a specific implementation, the working component can be a mechanical cable of a car's shifter or handbrake or other working component that needs to be driven by a drive motor 3; a car's shifter or handbrake is usually connected to the car's power device using a mechanical cable, so the automotive intelligent motor drive system of each embodiment can be applied to a shifter or handbrake.

[0052] The embodiments of the utility model are described above in conjunction with the accompanying drawings, but the utility model is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the utility model, ordinary technicians in this field can also make many forms without departing from the scope of protection of the utility model and the claims, which all belong to the protection scope of the utility model.

Claims

1. An electronic control device for an intelligent motor drive system of an automobile, used to control the working state of a drive motor, characterized in that: The electronic control device comprises: A signal generation module for generating a motor control signal; A motor drive module for connecting to the drive motor to control the working state of the drive motor in response to corresponding control instructions; and Two controllers are connected to the signal generating module and the motor driving module, and an SPI communication connection is established between the two controllers to monitor each other's working status; Among them, the two controllers and the motor drive module are configured as follows: when the two controllers monitor each other and find that they are working normally, they synchronously send the same first control instruction to the motor drive module according to the motor control signal; when the two controllers monitor each other and find that one of the controllers is working abnormally and disconnects from the motor drive module, only the normally working controller sends the second control instruction to the motor drive module according to the motor control signal; when the motor drive module receives two identical first control instructions issued by the two controllers respectively or receives one second control instruction at the same time, it controls the corresponding action of the drive motor.

2. The electronic control device of the automotive intelligent motor drive system as claimed in claim 1, characterized in that: The signal generating module comprises: a human-machine interaction unit for being operated by a user to generate the motor control signal, and both the two controllers are connected to the human-machine interaction unit.

3. The electronic control device of the automotive intelligent motor drive system as claimed in claim 2, characterized in that: The signal generating module further comprises: a CAN processor connected to a CAN bus of the automobile and used for generating the motor control signal according to the vehicle body data transmitted in the CAN bus, and at least one of the controllers is connected to the CAN processor.

4. The electronic control device of the automotive intelligent motor drive system as claimed in claim 1, characterized in that: The electronic control device includes two motor drive modules respectively used for connecting to and driving different drive motors, and each of the motor drive modules is respectively connected to the two controllers.

5. The electronic control device of the automotive intelligent motor drive system according to any one of claims 1 to 4, characterized in that: One of the controllers is a main controller, which is also connected to the Hall sensor of the drive motor. The main controller is also used to receive the motor current feedback data sent by the motor drive module and the motor Hall feedback data fed back by the Hall sensor, and perform closed-loop control of the motor drive module based on the motor current feedback data and the motor Hall feedback data.

6. The electronic control device of the automotive intelligent motor drive system as claimed in claim 5, characterized in that: The electronic control device further comprises: An alarm is connected to the main controller so that the main controller can control an alarm when at least one of the controllers fails.

7. The electronic control device of the automotive intelligent motor drive system as claimed in claim 1, characterized in that: The two controllers are also respectively connected to the hard-wire signal transmission circuit of the vehicle to receive the in-position signal sent from the hard-wire signal transmission circuit, and generate corresponding in-position instructions according to the in-position signal, wherein the in-position signal is generated when the micro switch installed at the end of the rotation stroke of the output shaft of the drive motor is pressed and triggered by the output shaft of the drive motor rotating by a predetermined angle and input into the hard-wire signal transmission circuit; the electronic control device also includes: A display module is connected to the two controllers and is used for responding to the in-place instruction and displaying corresponding in-place information.

8. The electronic control device of the automotive intelligent motor drive system as claimed in claim 5, characterized in that: The electronic control device further comprises: The card reading module is connected to the main controller and is used for inserting an external memory card to read the upgrade data in the external memory card to perform data upgrade on the two controllers.

9. The electronic control device of the automotive intelligent motor drive system as claimed in claim 5, characterized in that: The electronic control device further comprises: The power conversion module is connected to the on-board power supply of the automobile and is used to convert the initial voltage output by the on-board power supply into a predetermined working voltage to supply power to each power-consuming module of the electronic control device and the drive motor.

10. An intelligent motor drive system for an automobile, comprising a drive motor connected to a working part of an automobile to drive the working part and an electronic control device connected to the drive motor to control the working state of the drive motor, characterized in that: The electronic control device is the electronic control device as described in any one of claims 1 to 9.

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