用于电磁超声测温的脉冲激励电源研制  

Development of Pulse Excitation Power for Electromagnetic Ultrasonic Thermometry

作　　者：郭亚飞[1] 王高[1] 魏艳龙 梁海坚 石佳[1] 周汉昌[1] 

机构地区：[1]中北大学电子测试技术国防科技重点实验室,太原030051

出　　处：《电光与控制》2016年第5期99-103,共5页Electronics Optics & Control

基　　金：国家自然科学基金(11304289)

摘　　要：针对电磁超声测温需求,利用串联的功率MOSFET为开关器件,设计一种同步驱动MOSFET的新型高速高压脉冲激励电源。该电源通过现场可编程门阵列(FPGA)产生脉冲触发信号,经专用驱动电路驱动功率MOSFET实现幅值0~1.5 k V、脉冲频率10 Hz^1.5 k Hz、脉冲宽度3~30μs及脉冲个数在1~100的内高压的精确控制。实验数据表明,该电源系统设计合理,上升时间达到纳秒级,基本能满足电磁超声应用要求。Aiming at the requirements of electromagnetic ultrasonic temperature test, we designed a new type of high-speed high voltage pulse power by using the power MOSFET as switching device, which is based on the theory of synchronous driving MOSFET. The power system uses the FPGA for producing the pulse trigger signal and the dedicated driver module of power MOSFET for driving. It can achieve the precise control that the pulse voltage is of 0 ～ 1. 5 k V, the pulse frequency of 10 Hz ～ 1. 5 k Hz, the pulse width of 3 ～ 30 μs and the pulses number of 1 ～ 100. Experimental data showed that the design of power system is reasonable with the time of rising edge reaching nano scale, which can meet the requirement of electromagnetic ultrasonic applications.

关 键 词：脉冲电源 同步驱动 MOSFET 光纤隔离 FPGA 

分 类 号：TM89[电气工程—高电压与绝缘技术]