Automobile motor torque limiting method and device, vehicle controller and system

A vehicle controller and motor torque technology, applied in control devices, electric vehicles, control drives, etc., can solve problems such as motor torque output fluctuations, motor torque limit mutations, etc., to prevent oscillation, improve ride comfort, reduce The effect of the fluctuation

Active Publication Date: 2020-02-14
GAC AION NEW ENERGY AUTOMOBILE CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] During the implementation process, the inventors found that there are at least the following problems in the traditional technology: the traditional torque limiting method is easy to cause a sudden change in the torque limit of the motor, which in turn leads to fluctuations in the torque output of the motor

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  • Automobile motor torque limiting method and device, vehicle controller and system
  • Automobile motor torque limiting method and device, vehicle controller and system
  • Automobile motor torque limiting method and device, vehicle controller and system

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Embodiment Construction

[0031] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

[0032] In the traditional automobile motor torque limiting method, the motor torque limit is obtained by combining the allowable power of the automobile battery with the speed of the automobile motor at the current moment. This method has the following problems:

[0033] In new energy vehicles, the vehicle controller is responsible for coordinating various torque requirements and controlling the torque output of the vehicle motor according to the torque limit request of the parts. Whether the torque limit is smooth or not will also affect the final torque output, thereby a...

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Abstract

The invention relates to an automobile motor torque limiting method and device, a vehicle controller and a system. The method comprises the following steps that when an automobile battery allowable power is less than a preset power threshold, and when a speed change rate of an automobile motor is greater than zero, a motor torque limiting value is obtained according to a predicted motor speed andthe automobile battery allowable power; the predicted motor speed is the sum of a predicted speed increment and an automobile motor speed at the current moment; the predicted speed increment is the product of the speed change rate of the automobile motor and a predicted time; and the torque output of the automobile motor is limited on the basis of the motor torque limiting value. According to theautomobile motor torque limiting method and device, the vehicle controller and the system, the sudden change of the torque limiting value of the motor can be smoothed, the fluctuation of the torque output of the motor is reduced, and the smoothness of driving is improved.

Description

technical field [0001] The present application relates to the technical field of new energy vehicles, in particular to a method, device, vehicle controller and system for limiting torque of an automobile motor. Background technique [0002] With the development of new energy vehicle technology, electric vehicles have appeared. The vehicle controller of electric vehicles controls the output of motor torque according to the current working status and capabilities of the current battery, motor and other high-voltage components to ensure the normal driving of the vehicle. Generally, the torque limit of the motor includes the torque limit of the external characteristics of the motor, the temperature and speed limit of the motor, and the allowable power limit of the car battery. Among them, the allowable power limit of the car battery is generally converted into a torque limit for the motor according to the current speed of the motor. [0003] During the implementation process, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L15/20
CPCB60L15/20B60L2240/423Y02T10/72
Inventor 杨黎健陈立华刘涛罗经纬潜磊
Owner GAC AION NEW ENERGY AUTOMOBILE CO LTD
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