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Device and method for controlling rotating speed of fan through PWM signals

A PWM signal and fan speed technology, applied in the server field, can solve problems such as uncontrollable speed, and achieve the effect of reliable design principle, simple structure, and wide application prospects

Inactive Publication Date: 2021-02-02
SUZHOU LANGCHAO INTELLIGENT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, receiving the horizontal potential of the PWM and judging the high-level voltage will inevitably increase. Like this type of fan, the PWM modulation signal generated by the control chip cannot control its speed to achieve a controllable effect.

Method used

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  • Device and method for controlling rotating speed of fan through PWM signals

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Embodiment Construction

[0021] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0022] In the description of the present invention, it should be understood that the terms "first", "second" and so on are only used for descriptive purposes, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features . Thus, a feature defined as "first"...

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Abstract

The invention provides a device and method for controlling the rotating speed of a fan through PWM signals. The device comprises a PWM generator, a laser PWM control circuit and a fan PWM control circuit, wherein the PWM generator is connected with the laser PWM control circuit, and the fan PWM control circuit is connected with the fan; and a laser diode is arranged on the laser PWM control circuit, and a photodiode is arranged on the fan PWM control circuit and used for receiving light beams of the laser diode. According to the device and method for controlling the rotating speed of the fan through the PWM signals, a new level conversion mode is provided, the fan control requirement of high operation voltage is met, and a control signal can reach the voltage level capable of controlling the rotating speed of the fan.

Description

technical field [0001] The invention belongs to the technical field of servers, and in particular relates to a device and a method for controlling fan speed with a PWM signal. Background technique [0002] Laser diode is a light-emitting element with strong energy, which can emit light with exactly the same wavelength and phase, and its biggest feature is strong interference. The light generated by the injected current travels back and forth between the two mirrors, amplifying until it produces laser oscillations. A photodiode is a photodetector that converts a current or voltage signal by absorbing light. [0003] At present, the server circuit design controls the fan by using the PWM modulation signal generated by the control chip to control the speed of the fan. When the system temperature increases, the control chip will increase the duty cycle of the PWM modulation signal, and the fan speed will increase; Conversely, when the duty cycle of the PWM modulation signal de...

Claims

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Application Information

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IPC IPC(8): F04D27/00
CPCF04D27/004
Inventor 王俊凱
Owner SUZHOU LANGCHAO INTELLIGENT TECH CO LTD
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