Safety monitoring method of motor driving system of full electric vehicle

A technology of motor drive system and safety monitoring, applied in electric vehicles, electrical devices, vehicle components, etc., can solve problems such as high torque loss of control, output torque measurement, etc., to achieve the effect of improving safety and reliability

Active Publication Date: 2014-07-30
CHERY AUTOMOBILE CO LTD
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Problems solved by technology

This kind of motor is used in pure electric vehicles, mainly using torque control, and the actual output torque of the sine wave permanent magnet synchronous motor cannot be actually measured by the on-board sensor at present, and can only be estimated by processing the parameters such as the three-phase current and position of the motor In this way, there is a greater risk of torque out of control. As the main power system of pure electric vehicles, the motor drive system has high requirements for safety and reliability. Safety monitoring of the motor drive system has become an important part of the safety control of pure electric vehicles. part of

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  • Safety monitoring method of motor driving system of full electric vehicle
  • Safety monitoring method of motor driving system of full electric vehicle

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Embodiment Construction

[0018] Below with reference to the accompanying drawings, through the description of the implementation examples, the specific embodiments of the present invention, such as the shape, structure, mutual position and connection relationship between each part, the role and working principle of each part, etc., will be further described. detailed instructions.

[0019] The pure electric vehicle motor drive system safety monitoring method of the present invention comprises the following steps:

[0020] A. The vehicle controller controls the mode of the motor drive system according to the driver's needs. If the motor drive has a mode failure, it will feed back the fault information of the motor drive system to the vehicle controller;

[0021] B. The motor drive system calculates the maximum output torque of the current drive motor according to the current speed, motor temperature, motor controller temperature and the external characteristic curve of the motor , the vehicle control...

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Abstract

The invention provides a safety monitoring method of a motor driving system of a full electric vehicle, comprising the steps of monitoring the work mode, torque, current, and power of the motor driving system. Therefore the safety and the reliability of the whole vehicle are improved.

Description

technical field [0001] The invention relates to the technical field of electric vehicle power systems, in particular to a safety monitoring method for a pure electric vehicle motor drive system. Background technique [0002] At present, the electric drive system is applied in the car, which is limited by the installation space and has strict requirements on the size of the motor drive system. Therefore, the sine wave permanent magnet synchronous motor is generally used in the pure electric vehicle drive system. This kind of motor is used in pure electric vehicles, mainly using torque control, and the actual output torque of the sine wave permanent magnet synchronous motor cannot be actually measured by the on-board sensor at present, and can only be estimated by processing the parameters such as the three-phase current and position of the motor In this way, there is a greater risk of torque out of control. As the main power system of pure electric vehicles, the motor drive s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L3/00
Inventor 罗晓林伟义陈立冲王瑛黄彬蔡交明
Owner CHERY AUTOMOBILE CO LTD
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