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Method for setting rotating speed of fan by utilizing RC frequency

A fan speed and frequency setting technology, applied in mechanical equipment, pump control, non-variable pumps, etc., can solve problems such as being susceptible to interference, too small voltage range, and limited speed range, etc., and achieves strong anti-noise ability , the effect of simplifying the design process

Active Publication Date: 2009-12-16
陞达科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] 1. The speed range must be set inside the control chip first, and it cannot be adjusted at will, resulting in limited operation
[0010] 2. The voltage range is too small to be easily disturbed
[0011] 3. The speed range is also limited

Method used

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  • Method for setting rotating speed of fan by utilizing RC frequency
  • Method for setting rotating speed of fan by utilizing RC frequency
  • Method for setting rotating speed of fan by utilizing RC frequency

Examples

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Embodiment Construction

[0036] Such as figure 1 , figure 2 As shown, the figure is a preferred embodiment of the present invention. The present invention provides a method for setting the fan speed by using RC frequency. At least one oscillator 10 is coupled outside a control chip 1, and the oscillator 10 is used to The frequency range is set, and the oscillator 10 has a function of strong anti-noise capability, and the oscillator 10 includes at least one resistance element R and at least one capacitance element C.

[0037] Such as figure 1 As shown, one end of the resistive element R is coupled to a reference voltage Vref (or referred to as a target value reference voltage), and the other end thereof is coupled to one end of the capacitive element C, and the other end of the capacitive element C is connected to A ground terminal GND is coupled, and the resistive element R and the capacitive element C form an RC oscillation loop; the resistive element R can be a wirewound resistor, a metal film re...

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PUM

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Abstract

The invention provides a method for setting the rotating speed of a fan by utilizing RC frequency. A control chip sets the frequency range by utilizing at least one oscillator which is provided with at least one resistance element and at least one capacitance element. When the rotating speed of the fan is set, the resistance element and the capacitance element set the frequency and generate a pulse signal, a clock pulse generator converts the pulse signal into a square wave signal, a pulse sampler receives the square wave signal and judges whether the frequency of the square wave signal is lower than that of the control chip or not, if so, the pulse sampler receives a pulse signal which is generated by a frequency doubling signal generated by a high-speed clock device after doubling the frequency of the square wave signal, a multiplying unit receives the pulse signal to be converted into the frequency set by the rotating speed and generates a control signal, and a control unit controls the operation of the fan according to the control signal so as to achieve the purpose of setting the rotating speed of the fan.

Description

technical field [0001] The invention relates to a method for setting the fan speed, in particular to a method for setting the fan speed by using RC frequency to set the frequency range of the control chip using at least one oscillator. Background technique [0002] With the rapid progress of today's information technology, electronic devices (such as: computers) are endowed with more functions to increase the value of use, and due to the increased functions, it is necessary to add more components or parts in a system with a certain volume, and the above-mentioned The components or parts in the system will not only increase the density, but also increase the heat density. Therefore, it is necessary to use a heat sink to help it dissipate heat, and generally the most commonly used fan is the first choice. [0003] The existing fan control chip (Integrated Circuit, referred to as IC) method for rotating speed, which includes the following steps: [0004] Preset the speed range...

Claims

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Application Information

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IPC IPC(8): F04D27/00H03K4/06H03K4/08H03K5/26
Inventor 林招庆祝林林有康
Owner 陞达科技股份有限公司
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