CAJ | 학술논문

介绍了以脉宽调制控制电路SG3525为控制核心的大电流低电压开关电源的设计.该电源主电路采用DC/DC全桥变换器,SG3525输出信号经光电隔离、功率放大后驱动主电路开关管IGBT,应用反馈技术和PWM调制技术实现电源稳定输出和输出电流连续可调.文中给出了主电路和控制及驱动电路的具体设计及主要电路参数.试验结果表明,该电源工作稳定,实现了输出直流电流从45A到90A连续可调.
개소료이맥관조제공제전로SG3525위공제핵심적대전류저전압개관전원적설계.해전원주전로채용DC/DC전교변환기,SG3525수출신호경광전격리、공솔방대후구동주전로개관관IGBT,응용반궤기술화PWM조제기술실현전원은정수출화수출전류련속가조.문중급출료주전로화공제급구동전로적구체설계급주요전로삼수.시험결과표명,해전원공작은정,실현료수출직류전류종45A도90A련속가조.
@@@@A design for the switching power supply with large current and low voltage is presented, which is based on the Pulse Width Modulator control circuit named SG3525. The DC/DC full-bridge converter is used for the main circuit of the switching power supply. The output signals of SG3525 drive IGBTs of the main circuit after photoelectric isolation and power amplifier. In order to achieve the stable output and the continuously adjustable current, the technologies of feedback and PWM are applied to the switching power supply. This paper introduces the specific design and the primary circuit parameters of the main circuit, the control circuit and the drive circuit. The experimental results show that the switching power supply can steadily operate and continuously regulate the output current from 45A to 90A.