基于脉冲增益的开关电源磁芯复位仿真

Simulation of Magnetic Core Reset of Switching Power Supply Based on Pulse Gain

为提高开关电源磁脉冲能量传递效率,改进磁芯复位准确率、效率低的缺点,提出基于脉冲增益的开关电源磁芯复位研究。建立脉冲放大器模型体现损耗程度,获取光脉冲在增益介质中的传播方程,得出介质非线性效应、色散程度是影响脉冲传输特性的主要因素,且为实现功率平衡,设计放大器增益通量曲线;分析磁芯工作原理,利用电感的伏秒积平衡方程测量磁场强度与磁环高度等参数;通过设计合理的复位电路实现磁芯精准复位。仿真结果证明,所提方法可以有效复位磁芯,保证磁芯复位精度与速度,并且所提方法抗干扰能力较强,适用于复杂的电磁干扰环境中。

In order to improve the efficiency of magnetic pulse energy transfer of switch power and the accuracy of restoration of magnetic core,the magnetic core reset of switch power core based on pulse gain was researched.Firstly,the model of pulse amplifier was built to reflect the losses,and thud to obtain the propagation equation of the light pulse in gain medium.The nonlinear effect of medium and the degree of dispersion are the main factors affecting the pulse transmission characteristics.In order to achieve the power balance,the amplifier gain flux curve was designed.The working principle of magnetic core was analyzed.The volt-second product balance equation of inductor was used to measure the magnetic field strength and the height of magnetic ring.The magnetic core was accurately reset by designing a reasonable circuit.Following conclusions can be drawn from simulation results:the proposed method can effectively reset the magnetic core and ensure the accuracy and speed;Meanwhile,the proposed method has strong anti-interference ability,so it is suitable for complex electromagnetic interference environment.