分析了逆变器的死区效应产生的原因及其对交流伺服系统控制性能产生的影响,指出死区补偿的关键

在于电流相位的获取,为了克服实际系统中电流零点的模糊性,提出了一种基于两相静止坐标系下的前馈死

区补偿方法. 该方法通过对三相输出电流一个周期内补偿电压进行傅里叶变换,发现仅需补偿1 ,5 ,7 次谐波

分量即可消除死区效应. 仿真和试验结果验证了这种方法的正确性和可行性.-Analyzed were t he reason why t he dead2time effect rises in the inverter and how it influences

t he cont rol effect s of alternating current (AC) servo systems. It is found out t hat t he key point of t he

dead time compensation is obtaining t he current angle. In order to overcome t he f uzzy of t he current

zero point in t he real system , a met hod based on a feed2forward app roach t hat produces compensating

signal by use t he angle of t he current vector in t he is proposed. By apply t he Fourier t ransform ( FFT)

to t he compensating voltage in one period of t he t hree p hase outp ut current , t he dead time effect s is e2

liminated by compensate t he 1 , 5 , 7 harmonic component s only. The experimental result s show t he

effectiveness of the met hod.