Dual power switching method based on dual power switching circuit

By switching between the current source and voltage source modes of the rectifier inverter power unit, the problem of long load voltage and current power-off time during dual power supply switching is solved, fast and reliable power supply switching is achieved, and the stability of continuous power supply to the load is ensured.

CN116014869BActive Publication Date: 2025-09-05SUZHOU AIKE BORUI POWER SUPPLY TECH
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Patent Information

Application Number
CN202211613130.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-12-15
Publication Date
2025-09-05
Estimated Expiration
2042-12-15

AI Technical Summary

Technical Problem

In the prior art, it is difficult to control the load voltage and current power-off time within 3ms during the dual power supply switching process, which affects the reliability and stability of the power supply.

Method used

The rectifier inverter power unit is used to operate in current source mode. By cutting off the main electronic switch and adjusting the backup power output to the same electrical characteristic signal as the main power supply, it is then switched to voltage source mode. During the switching process, the voltage phase is adjusted in real time to achieve seamless switching, ensuring continuous and reliable power supply to the load.

Benefits of technology

The dual power supply switching time is achieved to ≤3ms, ensuring that the load is not significantly affected during the power supply switching process, and providing a highly reliable power supply solution.

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Abstract

The embodiment of the present application relates to a dual power switching method based on a dual power switching circuit, wherein the dual power switching circuit includes a main power supply, a backup power supply, a load, and a main electronic switch for connecting the main power supply and the load. The dual power switching circuit also includes a rectifier inverter power unit for connecting the backup power supply and the load; the dual power switching method includes: if the backup power supply detects that the main power supply has failed, the rectifier inverter power unit operates in a current source mode to cut off the main electronic switch, and the backup power supply adjusts its own output to the same electrical characteristic signal as when the main power supply fails; if the backup power supply outputs the same electrical characteristic signal as when the main power supply fails, the output mode of the rectifier inverter power unit is switched to a voltage source mode, and the rectifier inverter power unit then adjusts its output to be consistent with the backup power supply. The embodiment of the present application can effectively control the switching time of the main and backup power supplies to less than 3ms, ensuring the reliable and continuous power supply of the dual power supplies to the subsequent loads.
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Citation Information

Patent Citations

  • Multi-power switching main topology circuit and multi-power switching method

    CN111009956A

  • Uninterruptible Power Supply System With Fast Transfer For Undervoltage Source Line Failures

    US20140097690A1