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A stepless speed regulation control circuit for an AC fan

A technology of stepless speed regulation and control circuit, which is applied in the direction of AC motor acceleration/deceleration control, etc., can solve the problems of complex circuit structure and high cost, and achieve the effect of simple circuit structure, continuous adjustment, and wide temperature setting range

Active Publication Date: 2019-12-24
AVIC TECH XIAMEN ELECTRIC POWER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. The circuit structure is complex and the cost is high;
[0004] 2. Need to use complex control strategy algorithms such as space vector modulation;
[0006] 4. Only a few control nodes can be set, and modulation can not be performed at any node

Method used

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  • A stepless speed regulation control circuit for an AC fan
  • A stepless speed regulation control circuit for an AC fan

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Embodiment Construction

[0037] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0038] refer to figure 1 and figure 2 A stepless speed regulation control circuit for an AC fan, including a signal sampling unit 1, a modulation control unit 2, a silicon controlled rectifier 3 and a fan 4 connected in sequence, the signal sampling unit transmits the collected signal to the modulation control unit, which include:

[0039] Temperature signal sampling circuit 10: the temperature signal sampling circuit converts the collected temperature signal into a DC voltage signal that varies with temperature;

[0040] AC voltage sampling circuit...

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Abstract

The invention relates to a stepless speed regulation control circuit of an AC blower, and provides an AC blower control circuit which is simple in construction, is suitable for a motor with relatively small power, can be used for continuously regulating the rotational speed of the blower, and has a relatively wide temperature setting range. The stepless speed regulation control circuit comprises a signal sampling unit, a modulation control unit, a silicon controlled rectifier and a blower which are sequentially connected, wherein the signal sampling unit is used for sending an acquired signal to the modulation control unit and comprises a temperature signal sampling circuit and an AC voltage sampling circuit, and the modulation control unit is used for receiving the signal acquired by the signal sampling unit and comprises a silicon control rectifier conduction angle modulation circuit, a pulse width modulation (PWM) signal generator and a driving signal amplification isolation circuit which are sequentially connected.

Description

technical field [0001] The invention relates to the field of circuit control, in particular to a stepless speed regulation control circuit of an AC fan. Background technique [0002] The currently used AC fan speed control circuit is mainly frequency conversion speed control, but the frequency conversion speed control circuit has the following disadvantages: [0003] 1. The circuit structure is complex and the cost is high; [0004] 2. Need to use complex control strategy algorithms such as space vector modulation; [0005] 3. It is suitable for speed regulation control of larger power motors; [0006] 4. Only a few control nodes can be set, and modulation cannot be performed at any node. Contents of the invention [0007] The invention is a stepless speed regulation control circuit of an AC fan, and provides an AC fan control circuit with a simple structure, suitable for motors with relatively small power, capable of continuously adjusting the fan speed and having a wi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P23/20
Inventor 林东权陈文全蔡志雄孟超
Owner AVIC TECH XIAMEN ELECTRIC POWER TECH CO LTD
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