Research on Switch-Linear Hybrid Power Supply Based on Energy Feedback Scheme

Abstract:
As an essential component of a superconducting magnet system, the superconducting magnet power supply is responsible for the excitation and de-excitation of the superconducting magnet coil. This type of power supply needs to meet the requirements of high precision and high stability in output current. In response to these requirements, this paper proposes a switched linear composite power supply that achieves energy feedback, ensuring high precision and bidirectionality of the output current. The losses are quantitatively analyzed. To verify the feasibility of the proposed composite structure power supply, a simulation model with a peak power of 2 kW and a maximum current of 100 A was constructed. The output current stability reached 10 ppm, achieving high stability of the constant current source system for inductive loads.