Fan speed regulation circuit and multi-path parallel fan speed regulation circuit

A fan speed regulation and circuit technology, which is applied in the direction of machines/engines, mechanical equipment, pump control, etc., can solve the problems of fan speed regulation circuit complexity, increase hardware costs, and use more components, so as to save hardware costs, simple circuits, The effect of using less devices
CN110425174APending Publication Date: 2019-11-08XJ POWER CO LTD +3
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
XJ POWER CO LTD
Publication Date
2019-11-08

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Abstract

The invention relates to a fan speed regulation circuit and a multi-path parallel fan speed regulation circuit, and belongs to the technical field of motor control. The multi-path parallel fan speed regulation circuit comprises a primary side drive circuit and at least two speed regulation units, each speed regulation unit comprises an isolator and a secondary side energy storage circuit, whereinthe primary side of each isolator is connected in the primary side drive circuit, the secondary side of each isolator is connected to the corresponding secondary side energy storage circuit, and eachsecondary side energy storage circuit comprises an energy storage capacitor, a switch tube and a bias circuit of the switch tube. According to the fan speed regulation circuit and the multi-path parallel fan speed regulation circuit, more than two speed regulation units are arranged, and the speed regulation units can achieve the speed regulation effect of more than two parallel fans according tothe control of the same primary side drive circuit; and in addition, the multi-path parallel fan speed regulation circuit is simple, few in using devices, less in generated heat loss and capable of saving the hardware cost.
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Description

technical field

[0001] The invention belongs to the technical field of motor control, and in particular relates to a fan speed regulating circuit and a multi-channel parallel fan speed regulating circuit. Background technique

[0002] High-power power electronic devices will generate a lot of heat when they work, so fans are needed to dissipate heat. Usually, one fan cannot meet the heat dissipation requirements, and multiple fans need to be connected in parallel to dissipate heat. At the same time, in order to prolong the operating life of the fan and reduce the noise of the fan, a multi-channel parallel fan speed regulating circuit is needed to adjust the speed of the multi-channel fan according to the heat in real time.

[0003] At present, there are many kinds of fan speed control circuits, which are mainly divided into the following two types:

[0004] (1) In the fan power supply circuit, the series resistance acts as a voltage divider, such as figure 1 As shown, the ...

Claims

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