Motor control method, motor module using motor control method and radiating device

Abstract

The invention provides a motor control method, a motor module using the motor control method and a radiating device. The motor control method includes the following steps: providing the motor module; adjusting the control voltage into the driving voltage through a modulator, wherein the step includes the processes that a voltage controller judges whether a specific rotating speed is larger than a preset rotating speed or not; when the preset rotating speed is equal to or larger than the preset rotating speed, the direct-current voltage is adjusted into a first corresponding direct-current voltage corresponding to the special rotating speed through a motor controller and is provided for a motor; when the special rotating speed is smaller than the preset rotating speed, the direct-current voltage is adjusted through the motor controller into a second corresponding direct-current voltage corresponding to the special rotating speed, an adjusting signal corresponding to the special rotating speed is output to the modulator, and the modulator adjusts the second corresponding direct-current voltage with the adjusting signal and outputs the driving voltage to the motor; the working period of the adjusting signal is smaller than 100%. By means of the adjusting design of the embodiment, the motor module can run at a low speed, and the starting noise of a fan is accordingly reduced.

Description

Technical field [0001] The present invention relates to a motor control method, a motor module and a heat dissipation device using the same, and more particularly to a motor control method using a modulated signal, and a motor module and heat dissipation device using the same. Background technique [0002] In order to solve the heat dissipation problem, traditional technologies use fans to reduce the hot spot temperature. Generally speaking, fans usually start at a high speed. Although this can quickly cool down, it causes excessive operating noise. [0003] In terms of fan operation mode, it can be generally divided into DC mode and PWM mode. The common disadvantage of both is that the rotation speed cannot be reduced to a low speed. Therefore, a common method between the two modes has been created. [0004] For example, Taiwan Patent Publication No. TW201134083A1 discloses a speed regulation method for DC motors with dual power supplies. In this patent, such as figure 1 As shown...

AI Technical Summary

Problems solved by technology

Generally speaking, the fan is usually started at a high speed, although this can quickly cool down, but it causes the problem of excessive operating noise

[0003] In terms of fan operation modes, it can generally be divided into DC voltage mode (DC mode) and pulse width modulation mode (PWM mode). The common disadvantage of both is that the speed cannot be reduced to a low speed.

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