Proactive vibration damping control method for electric vehicle

Abstract

The invention relates to a proactive vibration damping control method for an electric vehicle. The method comprises the following steps: a position sensor detects the absolute position [theta] of a motor rotor and a speed calculation module calculates motor speed [omega]; a proactive vibration damping control module received an enable signal transmitted from an electric control system and a speed signal [omega] output by the speed calculation module, and calculates compensation torque Tc according to the product of a compensation torque initial value Tci and a scaling factor f, an addition module and an electric control system receive the compensation torque Tc; the addition module superposes a torque instruction T* and the compensation torque Tc to obtain a torque reference Tref, and outputs the torque reference Tref to a current control module; and the current control module generates a current instruction based on the torque reference Tref, performs current closed-loop control according to the phase current ia and ib and a position signal [theta], and outputs a low-voltage-signal-level pulse width modulation signal to an inverter. The method solves the drive train resonance of the electric vehicle caused by frequent engine start and stop or large-torque step, and improves the low-speed wobble.

Description

technical field [0001] The invention relates to an active vibration reduction control method for an electric vehicle. Background technique [0002] With the continuous increase of global car ownership, the environmental pollution caused by vehicle exhaust emissions is becoming more and more serious. At the same time, the massive consumption of fuel has also accelerated the depletion of oil resources. Energy vehicles are imminent. As an alternative product of traditional automobiles, new energy vehicles have become the general trend, and have been recognized and valued by governments and automobile companies around the world. New energy vehicles generally have multiple power sources. Taking hybrid vehicles as an example, the driving force of the vehicle comes from the engine and the electric motor, which can be driven independently or jointly. In order to reduce emissions and improve fuel economy, the engine needs to be idled and stopped, and after entering the high-efficie...

AI Technical Summary

Problems solved by technology

[0009] The invention proposes an active vibration reduction control method for electric vehicles, which solves the resonance problem of the drive train of electric vehicles caused by frequent starting and stopping of the engine or large torque steps, and effectively improves low-speed jitter

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