多功能节能型脉冲磁场发生器

A multi-function energy-saving pulsed magnetic field generator

为了实现刺激参数的灵活可调性,并提高磁场发生器的能量利用率,设计了一种多功能节能型脉冲磁场发生器;介绍了多功能节能型脉冲磁场发生器的电路拓扑结构,通过H桥电路结构实现放电开关IGBT与电容、刺激线圈互连,控制开关导通时间,在刺激线圈中产生近似三角形的脉冲电流,最终搭建实验平台并对其进行测试验证。结果表明:通过灵活调节开关,磁场幅度调节范围为1~1000 A,脉冲宽度调节范围为5~160μs,频率调节范围为1~10 Hz;利用续流回收阶段,将刺激线圈中的剩余磁能回收到储能电容中,提高了能量利用率,本节能型系统的能量损失率γ为6.3%~32.2%,明显低于传统磁场发生器的能量损耗。

In order to realize the flexible tunability of the stimulation parameters and improve the energy utilization of the magnetic field generator,a multi-functional energy-saving pulsed magnetic field generator is designed.The circuit topology of the pulsed magnetic field generator is presented.Through the H-bridge circuit structure,the discharge switch IGBTs are interconnected with capacitor,stimulation coil,etc.,and the switch on-time is controlled to generate an approximately triangular pulse current in the stimulation coil.Finally,the experimental platform is built and tested.The results show that the magnetic field amplitude adjustment range is 1-1000 A,the pulse width adjustment range is 5-160μs,and the frequency adjustment range is 1-10 Hz.By using the freewheeling recovery stage,the residual magnetic energy in the stimulation coil is recovered into the storage capacitor,which improves energy utilization.The energy loss rate of this system is 6.3%-32.2%,which is significantly lower than that of the traditional magnetic field generator.