【摘要】 介绍了基于DSP的变频变压电源系统。在比较两种SPWM控制方式的基础上,提出两桥臂对称工作的HPWM控制方式。简述了实现控制信号的思想,详述了HPWM的产生原理、基准正弦信号产生方式、PI调节的数字化过程。最后给出原理样机的实验波形。更多还原

【Abstract】 In this paper,a VFVV based on DSP is introduced.On the basis of comparing the modulation strategies of SPWM,a new HPWM method with two bridge legs in full-bridge inverters operating in symmetry is presented.The idea of realizing HPWM based on DSP is introduced in brief,the principle for realizing HPWM and fiducially sinusoidal wave-form and the implementation of digital PI are presented in detail.The scheme is verified on a 25 kHz,500 VA inverter,the frequency range is l5 Hz to 1 kHz,the voltage range is 0 to 150 V.更多还原