A power transformer pre-magnetizing device

By designing a pre-magnetizing device for the power supply transformer and utilizing rectification, inversion, filtering, and isolation matching technologies, combined with synchronous monitoring, surge-free pre-magnetizing under mismatched phase conditions was achieved. This solves the phase matching requirement problem in existing technologies and improves the system's flexibility and safety.

CN224328563UActive Publication Date: 2026-06-05ZHENJIANG MINGRUN INFORMATION TECH
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
ZHENJIANG MINGRUN INFORMATION TECH
Filing Date
2025-07-30
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

The existing pre-magnetization scheme is only applicable when the main transformer and the pre-magnetization transformer have the same phase sequence and phase power supply. It cannot effectively reduce surge current when the same power supply is not used from the primary side of the main transformer, and there are also risks related to cost and management and maintenance.

Method used

A pre-magnetizing device for a power supply transformer was designed, including a pre-magnetizing controller, a main transformer, a busbar, and a circuit breaker. The pre-magnetizing controller performs rectification, inversion, filtering, and isolation matching of the power input, and combined with a synchronous monitoring unit for real-time monitoring and control, to achieve surge-free pre-magnetizing of the main transformer.

Benefits of technology

It achieves pre-magnetization without surge current without strict phase matching, and can be used with both AC and DC power supplies, with high integration and synchronous control capabilities.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN224328563U_ABST
    Figure CN224328563U_ABST
Patent Text Reader

Abstract

The utility model discloses a power supply transformer pre -magnetic device, including pre -magnetic controller, main transformer and bus, be provided with circuit breaker C between main transformer and bus, and be electrically connected through circuit breaker C, be used for the circuit intercommunication between main transformer and bus after closing, the power input of pre -magnetic controller is accessed with external power supply, to supply the power input of pre -magnetic controller, the magnetic output of pre -magnetic controller is electrically connected in main transformer, to carry out the magnetic operation of main transformer, and its two monitoring end is electrically connected in main transformer magnetic line and bus respectively, to carry out the voltage, frequency and phase parameter synchronous monitoring of main transformer magnetic line and bus. The utility model can realize no impact surge, and pre -magnetic power supply need not strict matching phase, and AC and DC are general, and still have the characteristics of high integration simultaneously.
Need to check novelty before this filing date? Find Prior Art