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PFC control method and terminal equipment

A control method and controller technology, applied in the field of power supply, can solve problems such as UPS overvoltage protection, achieve the effects of preventing equipment overvoltage protection, improving power factor, and reducing output voltage

Pending Publication Date: 2021-11-26
ZHANGZHOU KEHUA ELECTRIC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the embodiment of the present invention provides a PFC control method and terminal equipment to solve the problem of overvoltage protection in the UPS after the generator is started in the prior art

Method used

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  • PFC control method and terminal equipment
  • PFC control method and terminal equipment
  • PFC control method and terminal equipment

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Embodiment Construction

[0018] In the following description, specific details such as specific system structures and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the invention may be practiced in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0019] In order to illustrate the technical solutions of the present invention, specific examples are used below to illustrate.

[0020] In prior art, refer to figure 1 , the input end of the PFC is usually provided with a filter capacitor C1. After the generator 14 is started, it charges the filter capacitor C1 (one filter capacitor C1 for each phase) at the input end of the PFC11 to generate re...

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Abstract

The invention is suitable for the technical field of power supplies, and provides a PFC control method and terminal equipment. The input end of a PFC is connected with a generator through a switch, and the output end of the PFC supplies power to rear-end equipment through a direct-current bus; the input end of the PFC is provided with a filter capacitor; the method comprises the following steps: acquiring the input current of the PFC in real time, and determining the reactive component of the input current according to the input current of the PFC; subtracting the input current reactive component from the reactive given current to obtain a reactive current error value; performing loop control on the PFC according to the reactive current error value; wherein the reactive given current is determined according to the value of a filter capacitor at the PFC input end. According to the invention, reactive compensation is accurately carried out on the PFC according to the filter capacitor at the input end of the PFC, and the power factor of the PFC is improved, so that the output voltage of a generator is reduced, and overvoltage protection of equipment is prevented.

Description

technical field [0001] The invention belongs to the technical field of power supplies, and in particular relates to a PFC control method and terminal equipment. Background technique [0002] UPS (Uninterruptible Power Supply, uninterruptible power supply) is an energy supply device used to provide uninterrupted power supply for power electronic equipment. refer to figure 1 , UPS may generally include: PFC (Power Factor Correction, power factor correction), energy storage module 12 and inverter module 13 . When the mains is normal, the UPS is powered by the mains. When the mains is abnormal, the generator 14 can be started to supply power for the UPS. [0003] In the prior art, when the mains power is abnormal and powered by the generator 14, the output voltage of the generator will rise after the generator 14 is started, thus causing the UPS overvoltage protection. Contents of the invention [0004] In view of this, an embodiment of the present invention provides a PFC ...

Claims

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Application Information

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IPC IPC(8): H02J9/06H02J3/16H02M1/42
CPCH02J9/062H02J3/16H02M1/4233Y02E40/30Y02B70/10
Inventor 胡欣黄詹江勇陈仲清
Owner ZHANGZHOU KEHUA ELECTRIC TECH CO LTD