60°坐标系下三电平逆变器SVPWM的实现

随着高速动车组的发展,三电平逆变器的研究和应用越来越广泛,其传统的空间矢量脉宽调制(SVPWM)方法需要进行大量的三角函数运算及扇区判定,增大了控制器的计算工作量.由于α,β坐标系中,三电平基本空间矢量图为正六边形,基于60°坐标系下的SVPWM算法,在计算基本矢量作用时间时避免了大量的三角函数运算.采用间接磁场定向矢...

Realization of SVPWM Method Based on 60° Coordinate System for Three-level Inverter

With the development of high-express electric multiple units,the design and application of three-level invert-er are more and more extensive.The traditional space vector pulse width modulation(SVPWM) method for the three-level inverter needs to estimate the sectors and calculate a lot of trigonometric functions.As a result,the calculating quantity of micro-processor is increased.Because the basic three-level space vector is a regular hexagon,the algorithm based on 60° coordinate system avoids a lot of trigonometric operations.The indirect field oriented control strategy is introduced.And a DSP-based induction motor control platform is built to verify the simple SVPWM algorithm.Experimental results show that the adopted method can omit a lot of trigonometric functions,and reduce the calculating burden of the control system.