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AC fan control circuit and equipment based on three-phase uncontrolled rectification

A three-phase AC, three-phase uncontrolled technology, applied in AC motor control, mechanical equipment, irreversible AC power input into DC power output and other directions, can solve the problem of high noise of AC fan

Active Publication Date: 2021-07-16
GD MIDEA AIR-CONDITIONING EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide an AC fan control circuit and equipment based on three-phase uncontrolled rectification, aiming to solve the technical problem that the three-phase uncontrolled rectifier circuit with an input filter in the prior art causes high noise of the AC fan

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  • AC fan control circuit and equipment based on three-phase uncontrolled rectification
  • AC fan control circuit and equipment based on three-phase uncontrolled rectification

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Embodiment Construction

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0030] It should be noted that if there is a directional indication (such as up, down, left, right, front, back...) in the embodiment of the present invention, the directional indication is only used to explain the position in a certain posture (as shown in the accompanying drawing). If the specific posture changes, the directional indication will also change accordingly.

[0031] In addition, if there are descriptions involving "first", "second" and ...

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Abstract

The invention discloses an AC blower control circuit and equipment based on three-phase uncontrolled rectification. In the present invention, by setting a denoising circuit and a filter unit in a three-phase uncontrolled rectification circuit, the filter unit supplies power to the AC fan after filtering the AC power; after the AC fan is energized, the denoising circuit suppresses the High-frequency harmonics, to achieve noise suppression control of AC fans. Among them, the high-frequency harmonic component flowing through the AC fan is effectively filtered through the denoising circuit, so as to avoid the magnetostrictive noise caused by the high-frequency harmonic flowing into the AC fan.

Description

technical field [0001] The invention relates to the technical field of motor control, in particular to an AC fan control circuit and equipment based on three-phase uncontrolled rectification. Background technique [0002] The three-phase uncontrolled rectification circuit is a relatively common circuit design type in the design of small and medium power switching power supplies. It can rectify the three-phase mains and obtain pulsating DC voltage to supply power to the system. [0003] Generally, the three-phase uncontrolled rectifier circuit needs to add an input filter when there are harmonic requirements, and the AC fan takes power from the rear end of the input filter. Due to the addition of the input filter, the high-order harmonics of the voltage at the power-taking end of the AC fan are very large. After the high-order harmonics flow into the AC fan, it will cause magnetostriction and generate noise. [0004] The above content is only used to assist in understanding ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P25/16H02M7/06H02M1/12F04D27/00
CPCF04D27/00H02M1/126H02M7/06H02P25/16
Inventor 杨建宁孙金田章文凯刘桂鹏
Owner GD MIDEA AIR-CONDITIONING EQUIP CO LTD