摘要
随着电力电子技术的发展,变流器及其控制策略在交流传动领域得到了广泛应用。对电压型逆变器来说,电流滞环跟踪PWM控制是一种实现简单、运行可靠的控制技术,但传统的电流滞环控制,负载电流在开关频率频带上的谐波失真较大,通过采用一种随机带宽滞环控制的方法,可以扩展负载电流在开关频率旁频带附近的带宽,减小负载电流的谐波失真。仿真结果验证了该方法的正确性和可行性。
The inverter and its control methods are applied in more and more fields with the development of power electronics technology. The technology of current hysteresis band PWM is an easy and reliable control method. But traditional current hysteresis band control method has some disadvantages. The harmonic distortion of its load current has comparatively big amplitude around switching frequency side band. This paper introduces a random band hystersis control method which can extend the spectrum contents of load current around switching frequency side band, and reduce the harmonic distortion of load current. Finally, the simulating results prove that this method is feasible and effective.
出处
《华东交通大学学报》
2009年第6期48-51,共4页
Journal of East China Jiaotong University
关键词
随机带宽
电流滞环
计算机仿真
random band
current hysteresis
computer simulation
