A power supply voltage regulating device and control method

CN113381409BActive Publication Date: 2026-04-03NEW ENERGY (BEIJING) SMART ENERGY TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2021-07-04
Publication Date
2026-04-03

AI Technical Summary

Technical Problem

Existing technologies are insufficient to effectively address the problems of low voltage and large voltage fluctuations at the end of the power grid, especially the damage to electrical equipment. Furthermore, traditional voltage regulation devices are slow to respond, costly, and complex, making them unable to cope with rapid voltage fluctuations.

Method used

Design a power supply voltage regulation device that uses a bridge arm composed of power semiconductor switching devices such as reverse-conducting IGBTs, MOSFETs, and IGCTs, combined with an input capacitor, an output inductor, and an absorption module. It achieves bidirectional power transmission and rapid voltage regulation through PWM modulation, and sets up a turn-on dead time and a discharge module to prevent overvoltage.

Benefits of technology

It achieves fast response, low cost, and high reliability voltage stabilization, effectively suppressing grid voltage fluctuations, improving power transmission efficiency, and protecting equipment safety.

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    Figure CN113381409B_ABST
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Abstract

This invention discloses an AC voltage regulating device and control method, which includes an input terminal (Ui1, Ui2) connected to the power grid, an input capacitor (3), an upper bridge arm (1), a lower bridge arm (2), an absorption module (4), and a discharge module (14). By adjusting the PWM duty cycle of the switching devices in the upper bridge arm (1) and the lower bridge arm (2), the total output voltage of Uo1 and Uo2 can be controlled to achieve a preset voltage value. The AC voltage regulating device and control method of this invention can realize direct voltage stabilization of AC power supply. Compared with existing technologies, it significantly reduces the complexity of the circuit and the cost of the device, and can effectively stabilize the power grid supply voltage. It has the advantages of fast response speed, low cost, simple control method, high reliability, convenient maintenance, and high efficiency.
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