A new energy vehicle motor drive control and vehicle speed safety protection method

Abstract

The invention discloses a new energy vehicle motor drive control and vehicle speed safety protection method, which is applied to a new energy vehicle including a vehicle controller, a motor controller, a motor speed detection device, and an anti-lock braking system ABS, including: calculating Three sets of motor speed values, motor rotor position values, and vehicle speed values ​​are generated, and corresponding credibility factors are established for the three sets of motor rotor position values; the credibility factors of each position value are adjusted according to the vehicle's own state, and the maximum credibility factor is used to correspond to The motor speed value and the motor rotor position value; the vehicle controller starts the corresponding vehicle protection strategy according to the reliability factor of the speed value. No need to add equipment to modify the original car, low cost, fast response, high reliability.

Description

A new energy vehicle motor drive control and vehicle speed safety protection method technical field The invention belongs to the field of motor drive systems, and relates to a kind of new energy vehicle motor drive control and vehicle speed safety protection. protection method. Background technique [0002] As a kind of energy-saving and environment-friendly products, new energy vehicles have very good prospects for use. At present, new energy vehicles adopt The motor is used as a power drive device, and the motor rotor position and motor rotation are calculated solely through the motor speed acquisition device. The speed of the motor is calculated in combination with the reduction ratio of the rear axle of the vehicle and the rolling radius of the tire to obtain the corresponding vehicle speed value. When the motor When the speed acquisition device fails, the electronic rotor information is abnormal, which affects the torque control of the motor by the motor control...

AI Technical Summary

Problems solved by technology

When the motor speed acquisition equipment fails, the electronic rotor information is abnormal, which affects the torque control of the motor controller to the motor, and further affects the safety of the vehicle when driving and fault parking; at the same time, it also makes the speed information abnormal, which further leads to vehicle speed information. Abnormal, if the vehicle is in the operation mode of speed control at this time, such as: maximum speed limit, constant speed creep control, constant speed cruise, etc., the abnormal speed feedback directly affects the control of the whole vehicle, and even causes the vehicle to lose control, triggering "speeding "And other accidents, bringing safety hazards

[0003] Adding acquisition equipment or replacing high-precision acquisition equipment will bring expensive cost consumption, as well as complex vehicle repair and maintenance problems; for the existing installation space and electrical interface on the vehicles currently in the market, adding equipment is necessary for equipment mechanical installation, There are big implementation problems in the electrical connection, in addition to the docking of data information with the whole vehicle, which may require multiple equipment hardware changes, software debugging and modification, the implementation of the restructuring is difficult, and the implementation period of the restructuring is long, which leads to the outage of the vehicle The indirect cost pressure of the

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