脉冲电场灭菌用固态高压开关的研制  

Development of solid-state high voltage switch for high-voltage pulsed electric field sterilization

作　　者：魏新劳[1] 丁厦 石丹丹[1,2] 邢雁凯 

机构地区：[1]工程电介质及其应用教育部重点实验室哈尔滨理工大学,黑龙江哈尔滨150080 [2]国网山东省电力公司检修公司,山东济南250000

出　　处：《电机与控制学报》2016年第7期24-31,共8页Electric Machines and Control

基　　金：国家自然科学基金(51277046);高等学校博士学科点专项科研基金(20122303110007)

摘　　要：针对脉冲电场灭菌技术对开关性能的特殊要求,提出了利用IGBT串联构成高压、大容量固态开关的技术。设计并实际制造出了可供高压脉冲电场灭菌用额定电压10 k V的固态高压开关。该开关采用8个1 700 V、400 A的IGBT串联,以栅极动态RCD为基本均压方式,以FPGA为主控单元,产生8路相对独立的基准控制脉冲,其脉宽、周期、延时均可调节,且以25 ns为步进调节。通过调节各路驱动信号的相对延时,使各单元分压均匀,消除过压影响,从而在负载端得到较为理想的方波脉冲。采用光纤隔离,使隔离电压不受限制。实验结果表明,该装置性能良好,可以满足脉冲电场灭菌的实际需求。Aiming at the special requirements of pulsed electric field sterilization technology to the per- formance of the switch, the technology that constitutes the solid-state switch of high voltage and large ca- pacity by using IGBT series connection was presented. The solid-state high voltage switch for high-voltage pulsed electric field sterilization was designed and actually manufactured,and its rated voltage is 10 kV. Eight 1700 V,400 A IGBTs series connection was adopted in the switch and gate dynamic RCD was taken as the basic voltage-balancing way. FPGA was used as the main control unit, which generates eight rela- tively independent of the inference control pulses, and its pulse width, cycle, delay time can all be adjus- ted. 25 ns was taken as the step adjustment. By adjusting the relative delay of each drive signal, equal voltage was got in each unit, over-voltage effects was eliminated, so as to get ideal square-wave pulse on the load side. By using optical fiber isolation, the isolation voltage is not restricted. The experimental re- suits show that the device has good performance and meets the actual demand of high-voltage pulsed elec- tric field sterilization.

关 键 词：脉冲电场 IGBT串联 固态高压开关 动态均压 现场可编程逻辑门阵列(FPGA) 

分 类 号：TM564.8[电气工程—电器]