【摘要】 数字化PWM调制在高频应用中存在精度受限制的问题 ,该文提出一种新的PWM技术———双调制PWM ,结合高频和低频的优势 ,解决了数字化PWM中高频与精度之间的矛盾 ,使数字化PWM可用于高频、高精度电能变换器之中 ,理论分析、仿真和实验结果均论证了这一方法的优越性。更多还原

【Abstract】 One problem with high-frequency PWM converter controlled by digital system is resolution limitation imposed by the hardware timer. In this paper, a novel PWM technique-double PWM(DPWM) is described. DPWM includes advantages of low and high switching frequency conversion, resolves the contradiction between high-frequency and precision in digital control circuits. Theoretic analysis, simulation and experimental results are included to show the performance of DPWM for high-frequency high-precision digitally controlled converter applications.更多还原