A power grid uninterruptible power supply automatic switching system, method and driving circuit

By using a delayed switching and accelerated shutdown unit drive design, the relays can be quickly closed and opened, solving the problem of excessively long relay shutdown time. This achieves the stability and reliability of the uninterruptible power supply to the power grid, and reduces system cost and complexity.

CN119482899BActive Publication Date: 2026-05-26DONGGUAN TGPRO POWER CO LTD
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Patent Information

Application Number
CN202411663995.X
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-11-20
Publication Date
2026-05-26
Estimated Expiration
2044-11-20

AI Technical Summary

Technical Problem

Existing technologies suffer from excessively long relay shutdown times after a mains power outage, affecting the stability of the load power supply. Furthermore, existing solutions are costly, complex, and unreliable.

Method used

The system employs a delayed switching drive design and an accelerated shutdown unit. By outputting high and low level signals through the control module, the relays are quickly closed and opened. The integrated accelerated shutdown circuit simplifies the hardware design and reduces the power requirements of the auxiliary power supply module.

Benefits of technology

Significantly shortens relay turn-off time, ensures stability and reliability of the power grid uninterruptible power supply switching process, reduces costs, extends equipment life, and improves system reliability and security.

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Abstract

This invention discloses an automatic switching system, method, and drive circuit for an uninterruptible power supply (UPS) in the field of power electronics. It includes a power module for providing electrical energy to the system; a relay switch unit for controlling the switching of mains power input; an accelerated turn-off unit for accelerating the turn-off of the relay switch unit; a circuit switching unit for switching a high-current drive circuit to a low-current drive circuit after a predetermined delay; and a control module for outputting a high-level signal to control the circuit switching unit to switch the high-current drive circuit to accelerate the closing of the relay switch unit, and outputting a low-level signal to control the accelerated turn-off unit to accelerate the turn-off of the relay switch unit. This invention employs a delayed switching drive design and an accelerated turn-off unit, which significantly simplifies the power supply hardware design, reduces the power requirements of the auxiliary power module, and significantly shortens the relay turn-off time, ensuring the stability and reliability of the UPS during the switching process.
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