Power Quality Control Method for Active Suppression of Electric Vehicle Impact

Abstract

The invention provides a power quality control method for actively inhibiting the shock extent of an electric automobile. The power quality control method comprises the following steps: step 1. online receiving or identifying the operation information of an electricity driven system, the status information of the electric automobile and the operating information of a driver; step 2: executing control on the driving torque of the electric automobile based on active damping dampers and the predicted shock extent inhibition; step 3: executing the active power quality control based on the feedback of the shock extent of the electric automobile; step 4: executing self-learning based on dynamic response characteristics of the electricity driven system, actively caught by a characteristic working condition; and step 5: outputting a control instruction to the electricity driven system, so that the active optimal control on the power quality of the electric automobile can be realized. Through the adoption of the power quality control method disclosed by the invention, the active inhibition of an automobile shock caused by the mutations in driving force, the active inhibition of an automobile shock caused by random changes of the running resistance of the automobile, and the on-line real-time control on the power quality and the self-learning of the electric automobile are realized, and the power quality control method has the characteristics that the power quality is good and is easy to realize on a real electric automobile.

Description

technical field [0001] The invention relates to an electric vehicle control technology, in particular to a power quality control method for active suppression of electric vehicle shock. Background technique [0002] Electric vehicles have become the focus and hotspot of global development, and their electric drive system has corresponding fast characteristics. If the power quality cannot be effectively controlled, it will not only deteriorate the driving comfort of the vehicle, but also cause torsional vibration of the power transmission system, thereby Threat to powertrain reliability. Therefore, the power quality control of electric vehicles is one of the important contents of electric vehicle control. [0003] At present, for the control of the power quality of electric vehicles, the ramp function is generally used to suppress the sudden change of the vehicle driving torque, thereby suppressing the sudden change of the vehicle acceleration and avoiding the impact of the ...

AI Technical Summary

Problems solved by technology

However, the determination of the ramp function is often not fully characterized by the electric drive system of the electric vehicle, and it relies heavily on the test calibration to suppress it too much, resulting in the performance potential of the system not being fully utilized in order to achieve shock suppression, which affects the vehicle dynamics; Random changes in resistance, and the fast response characteristics of the electric drive system will in turn cause drastic changes in vehicle impact, which in turn will cause vehicle impact to deteriorate. However, the commonly used ramp function cannot automatically adapt to random changes in vehicle driving resistance. Can guarantee the power quality of the vehicle

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