一种新颖的在线自校正死区补偿策略

摘要

In order to solve the problem of phase voltage,phase current distortion and torque ripple caused by effect of dead time in the low frequency and light load of sinusoidal pulse width modulation (SPWM) voltage source inverter.A novel self-calibration method was proposed.The method not only considered influence of dead time,voltage drop of power device,turn-on time and turn-off time on the output current of inverter.And the fluctuation ofDC bus voltage and carrier frequency was calculated and online compensated.Finally,the experiments were carried out before and after compensation,the results showed that the method had better compensation effect.%为解决正弦脉宽调制(SPWM)电压源逆变器在低频和轻载时死区效应所导致的相电压、相电流畸变和转矩脉动等问题,提出了一种新颖的在线自校正死区补偿策略.该策略考虑了死区时间、功率器件管压降、开通时间、关断时间等对逆变器输出电流的影响,而且对直流母线电压和载波频率的波动进行了自校正在线计算补偿.最后,对输出电流进行了死区补偿前和补偿后的对比试验,结果表明该方法具有较好的补偿效果.