摘要
三相电压源型逆变器的死区时间效应可能会导致电压损失,电流波形畸变和转矩脉动.为了改善电流波形,减少转矩脉动,详细分析了死区时间对输出电压的影响,并提出了SVPWM死区时间的补偿方法.该方法通过改变传统的180°导通模式为120°加180°轮流导通模式,由于交替使用两种导通方法,死区时间的影响可以减少到零.与传统的SVPWM技术相比,所设计方法实现简单,只需要修改部分软件程序,并通过仿真和实验结果验证了其正确性和算法的可行性.
The dead-time effect in a three-phase voltage source inverter can result in voltage losses, current waveforms distortion and torque pulsation. In order to improve the current waveforms and decrease the torque pulsa- tion, this paper analyzes the influence of dead-time on output voltage in detail, and proposes a dead-time compen- sation method of space vector pulse-width modulation （SVPWM）. The proposed method changes the traditional 180 degree turn-on mode into 120 degrees plus 180 degrees tum-on mode, through which the influence of dead time can be reduced to zero due to the alternate use of the two strategies. Compared to traditional SVPWM technique, the designed method is simple to realize because only part of program needs to be modified, and the correctness and feasibility of the algorithm are also verified by simulation and experiments results.
出处
《哈尔滨理工大学学报》
CAS
2013年第1期99-103,共5页
Journal of Harbin University of Science and Technology
基金
国家自然科学基金(E070303)
关键词
空间矢量脉宽调制
死区补偿
导通模式
space vector pulse-width modulation
dead-time compensation
conductive mode
