摘要
叙述了空间矢量脉宽调制(SVPWM)的基本原理。利用DSP芯片TMS320F2812分别用硬件和软件方式实现了SVPWM。分析了这两种方式的优缺点,并给出了相应的实验结果。硬件方式能够减少开关损耗,但谐波相对会高一些;软件方式下的开关次数虽然比硬件方式多,但电压的正弦性很好,消除谐波明显。若合理安排零矢量的作用时间,可有效改善PWM的谐波特性,使谐波更小。该SVPWM谐波优化程度高,电压利率高,算法实现相对简单。
The basic principle of pulse width modulation based on voltage space vectors, the implementing of SVPWM by using DSP TMS 320F2812 respectively in hardware and software with high speed and accuracy, the analysis of both the advantage and disadvantage of these two methods, and the experimental result were given accordingly in this paper. The switch loss can be reduced by using hardware but harmonics will be comparatively a bit. By using software, the voltage is approximately sinusoildil and harmonics decreased. If the zero vector operation time is well devised, the characteristics of the PWM harmonics will be efficiently modified, i. e. the harmonics will be less. The Algorithm is also not complicated.
出处
《中小型电机》
北大核心
2005年第5期37-40,共4页
S&M Electric Machines
关键词
电压矢量
脉宽调制
数宇信号处理器
voltage vectors
pulse width modulation
digital signal processor
