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Fan speed control method and main controller

A technology of fan speed and control method, applied in electric controllers, pump control, controllers with pulse train output signals, etc., can solve the problems of inconvenient fan control and inability to provide fans, and achieve convenient control operations and reduce power consumption. and noise, and the effect of improving stability

Active Publication Date: 2011-11-30
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[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.

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  • Fan speed control method and main controller
  • Fan speed control method and main controller
  • Fan speed control method and main controller

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Embodiment Construction

[0040] The technical solutions of the present invention will be further elaborated below in conjunction with the accompanying drawings and specific embodiments.

[0041] A fan speed control method provided by the present invention, such as figure 1 As shown, it mainly includes the following steps:

[0042] Step 101, the controller sends PWM signals with different duty ratios to the fan.

[0043] 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:

[004...

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Abstract

The invention discloses a speed control method of a fan, comprising: sending pulse width modulation (PWM) signals of different duty ratios to the fan; receiving speed pulse signals corresponding to the PWM signals of each duty ratio from the fan; The pulse signal obtains the fan speed corresponding to the PWM signal of each duty cycle; according to the PWM signal of each duty cycle and the corresponding fan speed, the linear relationship between the duty cycle of the PWM signal and the fan speed is generated; according to the generated linear relationship Generate a PWM signal with a duty ratio corresponding to the required fan speed and send it to the fan to control the fan speed. The invention also discloses a main controller, which can realize adaptive and accurate rotational speed control for fans of various models.

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