The Research of Cascaded Five-level Variable Frequency and Variable Speed System Based on DSP and IPM

In recent years, the technology based on the cascade multi-level inverter has been widely applied in the large-power and high-voltage energy control areas. According to the basic principle of Variable Frequency and Variable Speed system, using DSP and IPM, I introduce the hardware structure of this system , and elaborate the steering impulse method using the digital signal processor and the design of system´s control procedure. Adopting the advanced DSP of TMS320F2812 as the control center, I design the control software of the system, and carry on the experiment which is based on DSP experiment box. Through the Experimental results, we can see that the output sine wave of the system is well, and its approaching degree is high. Therefore, the system can apply in the electric drive system widely.