摘要
在SPWM控制的变频器中,死区的加入会使输出电压和电流波形发生畸变,使谐波分量增加。详细分析了死区对逆变器输出电压基波的影响,并在尽量不增加通用变频器硬件基础上,提出一种具有自适应零点调整的电流反馈型补偿方法。通过TMS320F2808 DSP芯片实现补偿算法,在5.5kW异步电机上验证了该补偿算法的有效性。
In the SPWM control of frequency converter, for the adding of the dead time, the waveform of the output voltage and current will be distorted and the harmonic will increase. The dead-time influence on output voltage fundamental is analyzed in detail, and a method of current feedback compensation with self-adaptive zero adjustment in the premise of not increasing the general converter hardware is also put forward. The results of experiment based on TMS320F2808 DSP chip verify the validity of this method on the 5.5kW asynchronous motor.
出处
《电气传动自动化》
2012年第6期10-14,25,共6页
Electric Drive Automation
关键词
通用变频器
死区效应
死区补偿
电流检测
general converter
dead-time effects
dead-time compensation
current detection
