A quasi-single-stage three-phase pulse power supply and a control method thereof

By introducing a three-phase T-type three-level rectifier and synchronous rectifier converter into a three-phase pulse power supply, combined with energy storage capacitors and zero-sequence component modulation, the problems of large size and low efficiency of traditional pulse power supplies are solved, achieving stable power supply and efficient energy transmission, and improving power grid quality and equipment performance.

CN114900061BActive Publication Date: 2026-06-19NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
3 Cites 0 Cited by

Patent Information

Application Number
CN202210618108.1
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-06-01
Publication Date
2026-06-19
Estimated Expiration
2042-06-01

AI Technical Summary

Technical Problem

Traditional pulse power supplies suffer from problems such as large size and weight, low energy transmission efficiency, harmonic pollution, and frequency fluctuations, especially in three-phase uncontrolled rectifier AC/DC power supply systems, which affect the stability of the power supply system.

Method used

The system adopts a quasi-single-stage three-phase pulse power supply structure, including a three-phase T-type three-level rectifier and a synchronous rectifier converter. It decouples the input and output power through energy storage capacitors, uses zero-sequence component modulation to achieve power distribution, constructs a single-stage power path, reduces the number of conversion stages, and improves energy transmission efficiency.

Benefits of technology

It achieves stable power supply for pulsed power, suppresses power surges, improves grid quality and power supply system stability, reduces equipment size and weight, and increases power density and energy transmission efficiency.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

This invention discloses a quasi-single-stage three-phase pulse power supply and its control method. The quasi-single-stage three-phase pulse power supply includes a three-phase T-type three-level rectifier and a synchronous rectifier converter. By injecting a zero-sequence component into the three-phase modulation wave, the power transferred from the T-type three-level rectifier to the low-voltage port is adjusted. Part of the energy is directly transferred to the load by the T-type three-level rectifier, achieving maximum power single-stage transmission and improving energy transmission efficiency. Furthermore, the wide-range fluctuation of the capacitors at the high-voltage and low-voltage output terminals of the T-type three-level rectifier compensates for the instantaneous power difference between input and output, suppressing the impact of pulse power on the AC power grid. Simultaneously, the synchronous rectifier converter compensates for voltage fluctuations at the low-voltage output terminal capacitor, providing a stable voltage to the pulse load. This invention achieves input-output power decoupling, suppresses the impact of pulse loads on the AC power grid, and improves energy transmission efficiency by maximizing power single-stage transmission, making it suitable for applications with pulse loads.
Need to check novelty before this filing date? Find Prior Art