摘要
针对传统的SVPWM运算复杂,必须进行扇区计算、扇区判断和空间矢量组合等过程,为了简化算法、提高DSP的运算速度,提出了一种等效SVPWM算法。该算法由规则采样PWM改进而来,使其两个零矢量的作用时间相等,从而与传统的SVPWM等效。在此理论分析之后,对基于等效SVPWM算法的压缩机驱动控制系统进行了建模仿真,结果表明该驱动控制系统调速性能较好,方案可靠。经过对定子电流进行FFT分析,进一步证明算法的正确性。通过实验结果验证,采用等效SVPWM算法的DSP程序能驱动压缩机稳定运转,电流波形正弦度好,证实算法可行。
For conventional SVPWM computational complexity, the need for a sector calculation, the sector selection and space vector combination and other processes, in order to simplify the algorithm to improve the executing speed of DSP, a kind of algorithm equivalent to SVPWM was described. The algorithm has improved on regular sampling PWM due to the equivalence operation time of two zero vectors consequently correspond to the conventional SVPWM. After the theoretical analysis, the simulation model of compressor driv- ing control system based on the equivalent SVPWM was established, simulation results shows that the speed performance of driving control system is good, the scheme is reliable. By the FFT analysis of stator current, the correctness of the algorithm was further proved. The experimental results show that the DSP program con- tains the equivalent SVPWM algorithm can drive the compressor to stable run, and the current has a good si- nusoidal wave, the feasibility of algorithm is verified.
出处
《微电机》
2016年第8期78-82,共5页
Micromotors
