A switch-mode ripple regulator for high-current magnet power supplies

This paper presents the analysis and design of a switch-mode ripple regulator (SMRR) suitable for high-current magnet power supplies using phase-controlled rectifiers. The contents of this paper include the determination of the SMRR voltage control technique, selection of the gating methods, and the design of the closed-loop voltage controller and feedback filter. The theoretical results are verified with experimental results. The design procedure and a design example are provided. The application of the SMRR can reduce the harmonic content in the magnet current to less than 10 parts per million (ppm) and the system bandwidth of several kHz can be achieved.<
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