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Fan speed regulation method

A speed regulation method and fan speed technology, applied in pump control, non-variable-capacity pumps, machines/engines, etc., can solve problems such as high noise, and achieve the effect of reducing noise

Inactive Publication Date: 2019-05-31
SHENZHEN WINLINE TECH
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0003] The DC charging pile is a very common charging device on the market, and its core device is the DC charging module. While the DC charging module realizes miniaturization and fast charging, the thermal stress of the module brings challenges to the module design. Many DC charging The piles are installed in residential areas and commercial centers. DC charging piles are high-power electrical equipment and have high requirements for heat dissipation. At present, forced air cooling is basically used for heat dissipation. This cooling method is extremely noisy. A DC charging pile When the pile is working at full power, the noise reaches above 75dB

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Embodiment Construction

[0038] In order to better understand the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0039] The charging pile module is mainly composed of PFC+DC / DC. The PFC circuit uses a three-phase Vienna topology, and the DC / DC uses a phase-shifted full-bridge topology. The thermal stress of the module mainly depends on three working conditions:

[0040] High ambient temperature (T a ) Working conditions: Since many charging pile module products are still working outdoors, the ambient temperature of their products will be relatively high.

[0041] Low input voltage (V in ) working condition: the thermal stress of the device in the PFC part mainly depends on the conduction loss and the turn-off loss of the device, and the conduction loss mainly depends on the output current (I in ), the greater the output current, the greater the conduction loss of the device.

[0042]

[0043] I in :Input...

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Abstract

The invention provides a fan speed regulation method. An actual rotating speed of a fan is determined according to three factors of input voltage, output current and ambient temperature, specific formulas of the rotating speed of the fan under different working conditions are specifically analyzed, data sampling is carried out on the ambient temperature Ta, output current Io and input voltage Vincorrespondingly, then digital signals ae processed, the pulse width modulation duty ratio of the fan rotating speed regulation according to the actual rotating speed formula of the fan, and a fan driving circuit is controlled to be started to realize regulation on the fan rotating speed. The thermal problem and noise problem of a balancing module are solved.

Description

technical field [0001] The invention belongs to the technical field of air-cooled and heat-dissipating power supply products, and in particular relates to a method for adjusting the speed of a fan. Background technique [0002] As the ecological environment is getting more and more attention now, automobiles are the main source of carbon emissions, carbon dioxide and other gas emissions lead to climate warming, and countries are increasingly strict on carbon emission standards and fuel consumption indicators and regulations. It is imperative to get rid of oil dependence, reduce carbon emissions, and develop new energy vehicles. Therefore, the current automobile industry is facing a new historical node, and the rapid development of new energy vehicles is bound to gradually replace fuel vehicles. The charging equipment for electric vehicles will also develop with the development of electric vehicles. [0003] The DC charging pile is a very common charging device on the marke...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D27/00
Inventor 张海东李晨光付加友朱建国
Owner SHENZHEN WINLINE TECH
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