UPS (Uninterrupted Power Supply) control management system

By designing a three-stage operational amplifier feedback network and a composite switching module, the stability and switching reliability issues of UPS uninterruptible power supplies under voltage fluctuations were solved, achieving high-precision power management and seamless switching, and improving the service life and power quality of the equipment.

CN224555267UActive Publication Date: 2026-07-24SHENZHEN YOULI CHUANGKE NEW ENERGY CO LTD
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Patent Information

Application Number
CN202521752294.3
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-08-18
Publication Date
2026-07-24
Estimated Expiration
2035-08-18

AI Technical Summary

Technical Problem

Traditional UPS uninterruptible power supplies require a long time to adjust their rectifiers when the voltage drops suddenly, resulting in frequent battery switching in and out. The mechanical contacts have a short lifespan and are easily damaged, and the number of mains power switching cycles is limited.

Method used

A rectifier module employing a three-stage operational amplifier feedback network and dynamic compensation resistors is designed. The operational amplifiers adjust the PWM duty cycle in real time, and diodes suppress reverse current. A composite switching module is designed to achieve seamless switching and high-frequency/low-frequency switching, thereby optimizing the coordination of the power management module.

Benefits of technology

It significantly improves power supply stability and accuracy, reduces grid harmonic interference, extends equipment lifespan, and achieves seamless switching and load balancing.

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Abstract

The utility model relates to the technical field of uninterruptible power supplies, and discloses a UPS (uninterruptible power supply) control and management system, which comprises a rectifier module; the inverter module is a static switch module; a power management module; and a power control module. A three-stage operational amplifier feedback network and a dynamic compensation resistor are utilized, when the input voltage fluctuates, the PWM duty ratio is adjusted in real time through an operational amplifier, the stability precision is remarkably improved, a diode D1 is utilized to suppress reverse current, and interference of power grid harmonic waves on a charging circuit is reduced; the chip IC1 can independently drive the two MOS tubes, the two MOS tubes are connected in parallel so that the conduction loss can be reduced, the output frequency is adjusted by combining the adjustable resistor, and seamless switching between high frequency and low frequency is achieved. A field effect transistor and a triode are connected to form a combination switch, switching surge is eliminated by matching with time delay circuits (C13 and R23), the switching time is obviously shortened, and a capacitor C13 can absorb switching transient peaks to avoid restarting of load equipment.
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