An adaptive dead-time compensation method based on Predictive Current Control

摘要

An adaptive dead-time compensation method is proposed on the basis of PWM predictive control in this paper. In order to eliminate the influence of dead-time, the dead-time error voltages in the d-q frame are acquired by reference current and feedback current as well as parameters of the motor. Then the dead-time error voltages are added to the predictive reference voltages. The proposed method is simple and with no requirement for the current polarity. Simulation and experimental results prove that the proposed method is effective in restraining the phase current harmonics. What's more, it's adaptive even under the variation of motor speed.