PWM控制技术以其控制简单,灵活和动态响应好的优点而成为电力电子技术最广泛应用的控制方式,也是人们研究的热点。由于当今科学技术的发展已经没有了学科之间的界限,结合现代控制理论思想或实现无谐振软开关技术将会成为PWM控制技术发展的主要方向之一。-PWM control technology with its simple control, flexible and dynamic response good advantage and makes power electronic technology is the most widely used control method, but also people research hot spot. As the development of science and technology has no subject line between, combining modern control theory thoughts or achieve no resonant soft switch technology will be PWM control technology is one of the main development direction of.