A driving motor control system and electric vehicle

Abstract

The utility model relates to the field of motor control, and provides a drive motor control system and an electric vehicle. The drive motor control system comprises: a PWM generator; a drive motor, which is connected to the PWM generator through an inverter; and a motor controller, which is used to control the drive motor. When the vehicle is in a parking state, the motor controller controls the PWM generator to be in a closed state. When the vehicle exits the parking state and is in the parking state, the whole vehicle controller does not need torque. At this time, the motor controller controls the PWM generator to be in a closed state, and the energy consumption of the electric drive is reduced without adding hardware, so as to increase the cruising range of the vehicle.

Description

Technical Field

[0001] The utility model relates to the technical field of motor control and provides a driving motor control system and an electric vehicle. Background Art

[0002] With the gradual popularization of new energy vehicles, the market's requirements for the efficiency of electric vehicle power systems are constantly increasing. Improving efficiency means saving energy, increasing driving range, and reducing range anxiety, which requires improving efficiency and reducing energy consumption in all aspects of electric drive.

[0003] After the vehicle is powered on, the electric drive controller is in working state and is always accepting commands from the vehicle controller, requesting the PWM generator to remain in the state of generating PWM waves in response to the real-time vehicle controller's requests. This causes the vehicle controller to request the PWM generator to remain in the state of generating PWM waves during periods when no torque is required, thereby increasing battery energy loss.

[0004] Application number: 201721383691.3, Patent name: Configurable PWM generator. The PWM generator in this technical solution cannot improve the above problems. Utility Model Content

[0005] The utility model provides a driving motor control system, aiming to improve the above problems.

[0006] The utility model is implemented as follows: a drive motor control system, the system comprising:

[0007] PWM generator;

[0008] A driving motor, wherein the driving motor is connected to a PWM generator via an inverter;

[0009] A motor controller for controlling a drive motor;

[0010] When the vehicle is in a parking state, the motor controller controls the PWM generator to be in a closed state.

[0011] In some embodiments, the system comprises:

[0012] The accelerator pedal is connected to the vehicle controller VCU for communication, and the vehicle controller VCU is connected to the motor controller for communication;

[0013] The vehicle controller VCU reads the current pedal opening of the accelerator pedal and the current vehicle speed in real time. When the accelerator pedal is not depressed and the vehicle speed is zero, it is determined that the vehicle is currently in a parking state.

[0014] In some embodiments, the system comprises:

[0015] The vehicle body stability system ESP is connected to the vehicle controller VCU;

[0016] The vehicle controller VCU reads the vehicle's current speed from the body stability system ESP in real time.

[0017] In some embodiments, the system comprises:

[0018] The speed sensor is connected to the vehicle controller VCU;

[0019] The speed sensor uploads the real-time detected vehicle speed, and the vehicle controller VCU reads the vehicle speed detected by the speed sensor in real time.

[0020] In some embodiments, the system further comprises:

[0021] The prompt unit is connected to the vehicle controller VCU for communication;

[0022] When the motor controller controls the PWM generator to be in a closed state, the prompt unit issues a prompt.

[0023] The embodiment of the utility model further provides an electric vehicle, wherein the electric vehicle is integrated with the above-mentioned drive motor control system.

[0024] After the electric vehicle is powered on at high voltage, the vehicle controller monitors in real time whether the vehicle is currently in the parking state. In the parking state, the motor controller controls the PWM generator to be in the off state to reduce the vehicle's electric drive energy consumption, especially in urban working conditions with many red lights. The efficiency and energy saving effect is more obvious. At the same time, the PWM generator is turned off in the parking state, which reduces the heat energy generated by the inverter and helps to extend the service life of the inverter. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the structure of a drive motor control system provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0026] The specific implementation methods of the present utility model will be further explained in detail below by describing the optimal embodiments with reference to the accompanying drawings.

[0027] Figure 1 The schematic diagram of the structure of the drive motor control system provided by the embodiment of the utility model, for the convenience of description, only shows the part related to the embodiment of the utility model, the system includes:

[0028] PWM generator;

[0029] A driving motor, wherein the driving motor is connected to a PWM generator via an inverter;

[0030] A motor controller for controlling a drive motor;

[0031] When the vehicle is in the parking state, the motor controller controls the PWM generator to be in the off state. When the vehicle exits the parking state, the motor controller controls the PWM generator to be in the working state. At this time, the PWM generator responds to the torque request of the vehicle controller to the motor controller.

[0032] When the vehicle is in the parking state, the vehicle controller does not need torque. At this time, the motor controller controls the PWM generator to be in the off state, reducing the energy consumption of the electric drive without adding hardware to increase the vehicle's cruising range.

[0033] In an embodiment of the utility model, the system further comprises:

[0034] The accelerator pedal is connected to the vehicle controller VCU for communication, and the vehicle controller VCU is connected to the motor controller for communication;

[0035] The vehicle controller VCU reads the current pedal opening of the accelerator pedal and the current vehicle speed in real time. When the accelerator pedal is not pressed and the vehicle speed is zero, it is determined that the vehicle is currently in a parking state. At this time, the vehicle controller VCU outputs a no-torque control state, and the motor controller controls the PWM generator to be in an off state based on the no-torque control state.

[0036] In an embodiment of the utility model, the system further comprises:

[0037] The vehicle body stability system ESP is connected to the vehicle controller VCU. The vehicle controller VCU reads the current vehicle speed from the vehicle body stability system ESP in real time, and then detects the parking state in combination with the accelerator pedal opening information. Of course, if the vehicle is not equipped with the vehicle body stability system ESP, the vehicle speed can be detected through an independently set speed sensor. The speed sensor uploads the real-time monitored speed, and the vehicle controller VCU reads the speed detected by the speed sensor in real time.

[0038] In an embodiment of the utility model, the system further comprises:

[0039] The prompt unit is communicatively connected with the vehicle controller VCU; when the motor controller controls the PWM generator to be in the off state, the control prompt unit issues a reminder to inform the driver and passengers that the current PWM generator is in the off state. The prompt unit may be an indicator light on the instrument cluster or a large on-board screen, and the PWM generator off reminder is issued through the indicator light or the large on-board screen.

[0040] The utility model embodiment also provides an electric vehicle, which is integrated with the above-mentioned motor control system. After the electric vehicle is powered on at high voltage, the vehicle controller monitors in real time whether the vehicle is currently in a parking state. In the parking state, the motor controller controls the PWM generator to be in an off state to reduce the vehicle's electric drive energy consumption, especially in urban working conditions with many red lights. The efficiency and energy saving effect is more obvious. At the same time, the PWM generator is turned off in the parking state, which reduces the heat energy generated by the inverter, which is beneficial to extending the service life of the inverter.

[0041] The utility model has been described exemplarily. Obviously, the specific implementation of the utility model is not limited to the above-mentioned method. As long as various non-substantial improvements are made by adopting the method concept and technical solution of the utility model, or the concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A drive motor control system, characterized in that: The system comprises: PWM generator; A driving motor, wherein the driving motor is connected to a PWM generator via an inverter; A motor controller for controlling a drive motor; When the vehicle is in a parking state, the motor controller controls the PWM generator to be in a closed state.

2. The drive motor control system according to claim 1, characterized in that: The system comprises: The accelerator pedal is connected to the vehicle controller VCU for communication, and the vehicle controller VCU is connected to the motor controller for communication; The vehicle controller VCU reads the current pedal opening of the accelerator pedal and the current vehicle speed in real time. When the accelerator pedal is not depressed and the vehicle speed is zero, it is determined that the vehicle is currently in a parking state.

3. The drive motor control system according to claim 2, characterized in that: The system comprises: The vehicle body stability system ESP is connected to the vehicle controller VCU; The vehicle controller VCU reads the vehicle's current speed from the body stability system ESP in real time.

4. The drive motor control system according to claim 2, characterized in that: The system comprises: The speed sensor is connected to the vehicle controller VCU; The speed sensor uploads the real-time detected vehicle speed, and the vehicle controller VCU reads the vehicle speed detected by the speed sensor in real time.

5. The drive motor control system according to claim 1, characterized in that: The system further comprises: The prompt unit is connected to the vehicle controller VCU for communication; When the motor controller controls the PWM generator to be in a closed state, the prompt unit issues a prompt.

6. An electric vehicle, characterized in that: The electric vehicle is integrated with a drive motor control system as claimed in any one of claims 1 to 5.

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