摘要
在分析空间矢量脉宽调制(SVPWM)机理的基础上,详细推导了SVPWM算法,对传统算法进行了等效简化并在原有算法的基础考虑了扇区过渡和过调制两种特殊情况,使算法得以优化和完善。基于改进后的SVPWM算法,在Matlab/Simulink环境下建立了SVPWM控制的三相电压型逆变器模型,通过改变算法中的某个系数实现了连续调制和不连续调制方式,仿真结果证明了改进后算法的正确性。最后提出了一种可以使开关损耗降低约50%的不连续调制策略。
Based on the principle of Space Vector Pulse Width Modulation （SVPWM）, this paper derived the SVPWM algorithm in detail. By making some extuivalent simplifications and taking two special circumstancessector transition and over modulation into consideration, the traditional algorithm was greatly optimized and perfected. Then, a SVPWM controlled three-phase Voltage Source Inverter CVSI） model was builtunder Matlab/ Simulink involving the improved algorithm. By changing some particular coefficient in the algorithm, multiple modulating methods-continuous and discontinuous ones were achieved in the simulation. The simulation results effectively proved the accuracy of the improved algorithm. In the end, a discontinuous modulation strategy that can decrease the switching loss by about 50% was proposed in this paper.
出处
《电力科学与工程》
2009年第8期5-9,共5页
Electric Power Science and Engineering
关键词
空间矢量
脉宽调制
仿真
space vector
pulse width modulation
simulation
