摘要
由于受到传统开关器件的限制,大电流开关电源存在功率小、效率低等问题,在对PWM软开关技术进行分析后,利用AT89C52单片机的中断方式输出频率和占空比可调的PWM脉冲,控制大功率开关管GT40T101的通断,从而实现以模拟继电器的方式控制电路的通断。通过搭建电路验证了PWM软开关在控制大功率电源方面的优越性,对于实际的电气工程应用具有一定的参考价值。
Due to the limitation of the traditional switch devices, high current switching power supply has small power, low ef-ficiency .After analyzing the PWM soft switching technology , the adjustable frequency and duty ratio of PWM pulse outputs by using AT89C52 microcontroller interrupt, switch or off the large power GT40T101 are controlled, then the control of on-off of the circuit is realized by simulating a relay.By building the circuit,the superiority of PWM in the control of high power soft switching power supply is verified, which has a certain reference value for the practical application of electrical engineering .
出处
《机械研究与应用》
2014年第2期174-177,共4页
Mechanical Research & Application
