Electric vehicle and performance monitoring method and system of electric vehicle driving system

A technology for electric vehicles and drive systems, which is applied in the direction of motor generator testing, electricity measurement, and measurement devices, etc., can solve the problems of motor runaway and scrap, affecting the safety of users' vehicles, and increasing current, so as to improve vehicle safety, The effect of improving vehicle safety

Active Publication Date: 2021-07-16
山东凯信德电子科技有限公司
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Problems solved by technology

[0004]Due to the complex road conditions of the electric vehicle drive motor, the rotor permanent magnet is easily demagnetized by factors such as temperature, reverse magnetic field, aging, vibration, and chemical environment. Once an irreversible demagnetizatio

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  • Electric vehicle and performance monitoring method and system of electric vehicle driving system
  • Electric vehicle and performance monitoring method and system of electric vehicle driving system
  • Electric vehicle and performance monitoring method and system of electric vehicle driving system

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Embodiment Construction

[0058] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0059] figure 1 It is a schematic flowchart of a method for monitoring performance of an electric vehicle drive system according to an embodiment of the present invention. In the method, the drive system includes a permanent magnet motor.

[0060] It should be noted that, in this embodiment, the electric vehicle using the permanent ma...

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Abstract

The invention provides an electric vehicle and a performance monitoring method and system for an electric vehicle driving system, which can execute the following steps: in each parking or deceleration process of the electric vehicle, detecting the no-load back electromotive force u of a permanent magnet motor of the electric vehicle on line; or automatically starting the test task at regular intervals or every preset time length Tt, waiting for parking or deceleration of the electric vehicle in real time after the test task is automatically started, and detecting the no-load back electromotive force u of the permanent magnet motor of the electric vehicle on line in the parking or deceleration process of the waiting electric vehicle after the waiting electric vehicle is parked or decelerated; and when the no-load back electromotive force u of the permanent magnet motor of the electric vehicle is detected every time, monitoring the performance of the driving system of the electric vehicle according to the correspondingly detected no-load back electromotive force u. The method and the system are used for improving the vehicle using safety of the user.

Description

technical field [0001] The invention relates to the field of electric vehicles, in particular to an electric vehicle and a performance monitoring method and system for an electric vehicle driving system. Background technique [0002] An electric vehicle (BEV) refers to a vehicle that is powered by an on-board power supply and uses a motor to drive the wheels. Because it has less impact on the environment than traditional cars, it has become more and more popular among the public. [0003] Permanent magnet synchronous motors (referred to as permanent magnet motors) have been increasingly used due to their compact structure, small size, light weight, high efficiency, high torque, high power density, reliable operation, and low noise. in the field of electric vehicle drives. [0004] Due to the complex operating road conditions of electric vehicle drive motors, the permanent magnets of the rotor are easily demagnetized by factors such as temperature, reverse magnetic field, a...

Claims

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Application Information

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IPC IPC(8): G01R31/34
CPCG01R31/343
Inventor 于治华李光顺王沛禹徐衍亮宫金林于川皓李红伟李洪滨于博雯隋明森
Owner 山东凯信德电子科技有限公司
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