摘要
针对电压源型SVPWM逆变器的死区效应,详细分析了死区时间对逆变器输出电压的影响,以及零电流箝位现象,提出一种基于空间电压矢量脉宽调制(SVPWM)的死区补偿新算法。该方法在电机定子绕组A相电流过零点处设置夹断区间,采用夹断区间外优化死区设置、按固定值补偿占空比,夹断区间内线性补偿占空比的新方法,来补偿死区效应对逆变器输出的影响。仿真结果表明,设计的死区补偿新算法有效地减小了电流畸变和谐波分量,提高了逆变器的供电效率。
Aimed at dead-time effect of voltage-source SVPWM inverter, the influence of dead-time effect and zero-current clamping on output voltage of inverter was analyzed in detail. A novel dead-time compensation algorithm based on SVPWM was presented in this paper. The pinch-off interval was set at zero crossing of A-phase current of stator winding of induction motor. For the compensation of dead-time effect on inverter output effect, the optimization of dead-time with compensating duty cycle according to a fixed value was developed outside the pinch-off interval, and a linear compensation method was used in the interval of zero-current clamping. The simulation results show that the proposed algorithm can reduce current distortion and harmonic components, improve the efficiency power supply. compensation of the inverter power supply.
出处
《信息技术》
2013年第5期57-60,共4页
Information Technology
基金
辽宁省教育厅科学技术研究项目(2008035)
关键词
电压源型SVPWM逆变器
死区效应
零电流箝位
死区补偿
voltage-source SVPWM inverter
dead-time effects
zero-current clamping
dead-time compensation