Method for controlling rotating speed of fan

A technology of fan speed and control method, which is applied in the direction of electric controller, pump control, electric speed/acceleration control, etc. It can solve the problems of inconvenient fan control, inability to achieve accurate control of fan speed, and inability to provide fans, etc., to achieve control Easy to operate, reduce power consumption and noise, and avoid the effect of overheating

Active Publication Date: 2009-12-30
ZTE CORP
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  • Abstract
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AI Technical Summary

Problems solved by technology

It can be seen that when using the same standard PWM signal to control different types of fans, it is impossible to accurately control the speed of various types of fans.
[0006] Due to the existence of the above-mentioned problems, it is currently impossible to provide a method for controlling the rotational speed adaptively according to different types of fans, so as to accurately control the rotational speed of various types of fans, which brings inconvenience to the control of the fans.

Method used

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  • Method for controlling rotating speed of fan
  • Method for controlling rotating speed of fan
  • Method for controlling rotating speed of fan

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Embodiment Construction

[0039] The technical solutions of the present invention will be further elaborated below in conjunction with the accompanying drawings and specific embodiments.

[0040] A fan speed control method provided by the present invention, such as figure 1 As shown, it mainly includes the following steps:

[0041] Step 101, the controller sends PWM signals with different duty ratios to the fan.

[0042] The so-called duty cycle refers to the time ratio of the high level in a period, for example: the period of the signal is T, and the high level time of each period is t 1 , the low level time is t 2 , T=t 1 +t 2 , then the duty cycle is t 1 / T; It can be seen that the value range of the duty cycle is 0-1. As known in the industry, the fan speed and the duty cycle of the PWM signal are linearly related. In the present invention, N represents the fan speed, and D represents the duty cycle of the PWM signal. Then, the linear relationship between N and D can be expressed as:

[0043...

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Abstract

The invention discloses a method for controlling the rotating speed of a fan, comprising the following steps: sending pulse width modulation (PWM) signals with different duty ratios; receiving rotating speed pulse signals which correspond to the PWM signals with the different duty ratios; acquiring the rotating speed of the fan, which corresponds to the PWM signals with the different duty ratios, according to the rotating speed pulse signals; generating the linear relation of the duty ratios of the PWM signals and the rotating speed of the fan according to the PWM signals with the different duty ratios and the corresponding rotating speed of the fan; generating a PWM signal with the duty ratio corresponding to the needed rotating speed of the fan according to the generated linear relation, and sending the PWM signal to the fan to control the rotating speed of the fan. The invention also discloses a main controller which can accurately control the adaptive rotating speed of fans of different types.

Description

technical field [0001] The invention relates to fan control technology, in particular to a fan speed control method and a main controller. Background technique [0002] With the development of electronic technology, the functions of electronic equipment are becoming more and more powerful, which requires the use of more integrated electronic devices and faster electronic devices. Although the manufacturing process of electronic devices has been greatly developed, and the power consumption of electronic devices is gradually reduced, electronic devices still generate a large amount of heat in electronic equipment. Since the operating temperature of various electronic devices has a certain range, beyond this range, the working state of the electronic device will be unstable, and the electronic device may even be burned. Therefore, the heat dissipation of the electronic device will affect the stability of the electronic device. sex and safety. [0003] In order to solve the he...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D27/00G05D13/62G05B11/28
Inventor 贾春勇刘光王春生
Owner ZTE CORP
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