一种多路隔离驱动电路的设计与实现  

On Design and Implementation of an Isolated Driving Circuit with Multi-Channel Output

作　　者：陈珊珊[1,2] 

机构地区：[1]重庆电子工程职业学院机电学院,重庆401331 [2]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400044

出　　处：《西南师范大学学报（自然科学版）》2015年第8期86-91,共6页Journal of Southwest China Normal University(Natural Science Edition)

摘　　要：在多输入直流变换器中,由于多个开关管不共地,因此常常需要设计多路隔离驱动电路.基于此,设计了一种多路隔离驱动电路,包括多路隔离驱动电源、基于改进传统NE555多谐振荡器实现的PWM信号发生电路和基于TLP250实现的隔离电路.详细分析了各个部分的工作原理并给出相应的电路原理图.最后,通过实验验证了所设计电路的正确性和可行性.Since many switches do not share a common ground in the multiple‐input dc‐dc converter ,isola‐ted driving circuit is usually needed .Due to this ,an isolated driving circuit with multi‐channel output is designed in this paper ,which includes an isolated driving power supplies with multi‐channel output ,a cir‐cuit producing PWM signal based on improved NE555 multivibrator and an isolated circuit based on TLP250 .Operating principle of every part is analyzed in detail and the corresponding schematic circuit is given .Finally ,the experimental results verify the correctness and feasibility of this driving circuit .

关 键 词：隔离驱动 PWM发生器 多输入直流变换器 

分 类 号：TM72[电气工程—电力系统及自动化]