600 A重复频率脉冲恒流源研制北大核心CSCD

针对国内脉冲恒流源幅值较小、重复频率较低等问题,设计了基于电流闭环反馈控制的恒流电路,建立了相应的数学模型,并采用Pspice仿真验证了电路的功能,最终研制了1台600 A重复频率工作的脉冲恒流电源。电源采取储能放电配合高速开关的工作模式,使用功率场效应三极管作为线性调整开关,可大范围自动恒流,适用于激光二极管负载。输出的脉冲电流幅值最高600 A,上升时间小于40μs,电压幅值最高320 V,脉宽100~600μs可调,工作重复频率最高200 Hz。电源体积较小,结构紧凑,效率可达90%以上。

Development of 600 A repetitively pulsed constant current source

As the present of pulsed constant current source have problems of low amplitude and repetition frequency, we design a pulsed constant current source adopting integral feedback to get closed-loop current control, build the mathematical model and verify the function of the circuit by Pspice. The source adopts the working mode of energy storage and discharging with high-speed switch, uses MOSFET as linear adjustment switch and can be used for laser diodes loads. The maximum output current pulse is 600 A with adjustable pulse width from 100 μs to 600 μs, the largest output voltage is 320 V, the rising edge is under 40 μs and the maximum repetition frequency is 200 Hz. The structure of the source is compact, and the efficiency of the source can reach more than 90%.