星载电子设备浪涌电流抑制以及浪涌电流的测试方法

Methods of Inrush Current Restraining and Measuring for Space Electronic Devices

摘要:

介绍了一种可用于星载开关电源的浪涌电流抑制电路；该电路在设备供电正线上串连P沟道MOSFET管,其栅源电压受专门设计的RC网络控制；通过调节外围的阻容器件改变栅源电压的上升速率,就可以实现浪涌电流抑制；试验结果表明,该电路可以将启动电流抑制在额定输入电流的1.5倍,或不大于2 A,且持续时间不大于5 ms,上升斜率不大于10⁶A/s；该电路已经被广泛应用于各类星载设备中,设备运行稳定可靠；同时对星载设备浪涌电流的形成原理以及测试方法进行了介绍。

Abstract:

Inrush Current Limiter for spacial switching convertor is recommended in this paper. There is a P-Channel MOSFET in series with positive power line, Voltage between Gate and Source(VGS) is controlled by RC Net. Inrush Current can be limitted by changing Raise rate of VGS (dv/dt), which depends on parameter of RC Net. The experimental results show that the circuit is capable of inhibiting the starting current to 1.5 times that of the rated current, or no more than 2 A; at the same time, the duration of the starting current is not more than 5 ms and the rising slope is less than 10⁶A/s.The Limiter is widely used for space electronic devices,which run steadily and reliably. Besides, the theory and measurement of Inrush Current are introduced. 