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. The method is applied to a new energy vehicle comprising a vehicle controller, a motor controller, motor rotating speed detection equipment and an anti-lock braking system ABS, and comprises the following steps: calculating three groups of motor rotating speed values, motor rotor position values and vehicle speed values, and establishing corresponding credible factors for the three groups of motor rotor position values; adjusting the credible factor of each position value according to the state of the vehicle, and adopting the motor rotating speed value and the motor rotor position value corresponding to the maximum credible factor; and starting, by the whole vehicle controller, a corresponding whole vehicle protection strategy according to the condition of the rotating speed value credible factor. It is not required to add equipment to reconstruct the original vehicle, the costis low, response is rapid, and the reliability is high.

Description

technical field [0001] The invention belongs to the field of motor drive systems, and relates to a new energy vehicle motor drive control and vehicle speed safety protection method. Background technique [0002] As an energy-saving and environment-friendly product, new energy vehicles have a very good prospect for use. At present, new energy vehicles use motors as power drive equipment, and the motor rotor position and motor speed are calculated solely through the motor speed acquisition device. The motor speed is combined with the rear axle reduction ratio of the vehicle and the tire rolling radius to calculate the corresponding vehicle speed value. 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 t...

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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