A high-power superconducting magnet power supply system and control method with controllable positive and negative rates

CN116865588BActive Publication Date: 2026-06-30HUNAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HUNAN UNIV
Filing Date
2023-07-18
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Existing technologies for controlling high-power superconducting magnets are complex, difficult to implement, and make it hard to achieve precise control of the charging and discharging rates of superconducting magnets.

Method used

The power supply system adopts a three-stage structure, including an input stage, an intermediate stage, and an output stage. It utilizes a three-phase full-bridge voltage-source PWM rectifier circuit, a modular DAB converter, and an H-bridge structure, combined with voltage and current control PID, to control the operation of the power switching transistors through PWM waves, thereby achieving controllable charging and discharging at positive and negative rates.

Benefits of technology

It achieves simple and efficient control of high-power superconducting magnets, can precisely adjust the charging and discharging rate, and feed electrical energy back to the grid during discharge, thereby improving the system's stability and response speed.

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Abstract

This invention discloses a high-power superconducting magnet power supply system and control method with controllable positive and negative rates. The system includes an input stage, an intermediate stage, and an output stage. The input stage is a three-phase full-bridge voltage-type PWM rectifier circuit, connected to a three-phase power grid. The intermediate stage is a modular DAB converter composed of three cascaded dual active bridges, connected to the input and output stages. The output stage is an H-bridge structure, connected to the high-power superconducting magnet. By controlling the power switches in individual DAB and H-bridge circuits using PWM, the high-power superconducting magnet can be magnetized and demagnetized at controllable rates. This power supply system consists of three stages: an input stage, an intermediate stage, and an output stage. The control method, combined with the circuit topology, is simple, efficient, and easy to implement. It effectively controls the charging and discharging rate of the high-power superconducting magnet and feeds electrical energy back to the power grid during discharge.
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