摘要
The China Spallation Neutron Source (CSNS) Rapid Cycling Synchrotron (RCS) is a high beam power proton accelerator.The task of RCS injection system is to inject the negative hydrogen ions coming from linac into RCS by stripping method.This power supply demands that its output pulse current falling edge be controlled by the program. The power supply uses the IGBT power amplifying method to generate the pulse current and makes it follow the setting waveform by the power supply's feedback control system.The tracking error is one of the important specifications of the power supply.To satisfy the tracking error less than 2%,the frequency of the IGBT topology requested is more than 400kHz.The IGBT topology is connected by the IGBT H bridges in series and parallel,and works in the phase shifted method to divide the current,the voltage and improve the equivalent frequency.High power,high frequency,fast speed response and optimal feedback control strategy are the key to the good performance of painting bumper magnets pulsed power supply.
中国散裂中子源(CSNS)快循环同步加速器(RCS)是一台高束流功率质子加速器,RCS注入系统是将直线加速器预加速的负氢离子束流通过剥离的方式注入到RCS环中,注入系统采用凸轨方案和相空间涂抹技术并要求涂抹凸轨磁铁脉冲电源输出脉冲电流的下降沿能够被程序控制,电源采用IGBT功率放大的方式产生脉冲电流,用程序控制电源的给定波形,通过电源反馈控制系统,使电源的输出波形跟随电源的给定波形,达到控制电源输出脉冲电流下降沿的目的.电源输出脉冲电流的跟踪误差是涂抹凸轨磁铁脉冲电源的重要指标,为了满足跟踪误差小于2%的指标,要求IGBT拓扑频率大于400kHz.IGBT拓扑采用IGBT H桥串并联错相工作的方式达到分压、分流和提高频率的作用.高功率、高频率、快速的响应时间和最佳的反馈控制策略是涂抹凸轨磁铁脉冲电源具有良好性能的关键.
基金
中国散裂中子源工程预研项目资助~~
