Method and device for stepless speed regulation of fan in electromechanical system

A stepless speed regulation, electromechanical system technology, applied in mechanical equipment, machine/engine, cooling/ventilation/heating renovation, etc., can solve the problems of slow response, noise, easy to skip gears, etc., to achieve fast convergence and stable temperature control Precise, responsive effects

Active Publication Date: 2021-11-26
FENGHUO COMM SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the above defects or improvement needs of the prior art, the present invention provides a method and device for stepless speed regulation of a fan in an electromechanical system. Control within a reasonable range, thereby solving the technical problems of slow convergence of fan speed, slow response, easy gear jump and serious noise

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  • Method and device for stepless speed regulation of fan in electromechanical system
  • Method and device for stepless speed regulation of fan in electromechanical system
  • Method and device for stepless speed regulation of fan in electromechanical system

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Embodiment 1

[0041] In order to solve the problems of slow speed convergence, slow response, easy shifting and serious noise in the traditional fan gear speed regulation, the embodiment of the present invention provides a stepless fan speed regulation method for electromechanical systems, such as figure 1 As shown, it mainly includes the following steps:

[0042] In step 101, the temperature of each temperature monitoring point is obtained, and the highest temperature is selected from the obtained multiple temperature values.

[0043] refer to figure 2 , there are usually multiple temperature monitoring points on the communication equipment, respectively recorded as temperature monitoring point 1, temperature monitoring point 2,..., temperature monitoring point n, respectively distributed in each business disk of the communication equipment or other motherboards that need heat dissipation on each processor; each temperature monitoring point is provided with a temperature sensor, and the ...

Embodiment 2

[0059] On the basis of the stepless speed regulation method for a fan of an electromechanical system provided in Embodiment 1 above, the embodiment of the present invention further describes the calculation formula of the PWM duty ratio in step 102 .

[0060] The calculation method of the PWM duty cycle specifically includes the following three situations:

[0061] 1) When delta_t>Tdiff and temp≥temp1, pwm=pwm1+C1*delta_t-C1*Tdiff;

[0062] 2) When delta_t<-Tdiff and temp≤temp1, pwm=pwm1+C2*delta_t+C2*Tdiff;

[0063] 3) In other cases, pwm=pwm1, that is, the duty cycle is not adjusted this time;

[0064] Among them, delta_t=temp-Tref. The meanings of the parameters in the above formula are as follows: Tref is the set target temperature, Tdiff is the maximum allowable deviation; temp is the maximum temperature during this monitoring, and temp1 is the temperature at the key node during the last speed regulation; pwm is the new PWM duty cycle calculated this time, pwm1 is the ...

Embodiment 3

[0082] On the basis of the stepless speed regulation method for the fan of the electromechanical system provided in the above-mentioned embodiment 1, the embodiment of the present invention further provides a stepless speed regulation device for the fan of the electromechanical system, which is used to implement the fan stepless speed regulation method in the first embodiment. Stepless speed regulation method.

[0083] like figure 2 As shown, the fan stepless speed regulation device provided by the embodiment of the present invention mainly includes the MPU, the MCU of the control center, the fan disk and a plurality of temperature sensors.

[0084] The plurality of temperature sensors are respectively arranged at a plurality of temperature monitoring points on the communication device, and are used to collect the temperature of each temperature monitoring point on the communication device;

[0085] The MPU is used to obtain the temperature collected by each temperature sens...

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Abstract

The invention discloses a method and device for stepless speed regulation of a fan in an electromechanical system, wherein the method includes: obtaining the temperature of each temperature monitoring point and screening out the highest temperature; calculating a new PWM duty based on the difference between the highest temperature and the target temperature ratio; issue a new PWM duty cycle to the fan tray, so that the fan tray can adjust the speed and stabilize the device temperature at the target temperature; among them, when the highest temperature exceeds the high temperature threshold, and the temperature of the corresponding temperature monitoring point continues to rise or When it remains unchanged, the duty cycle is increased; when the maximum temperature is lower than the low temperature threshold, and the temperature of the corresponding temperature monitoring point is still falling or remains unchanged, the duty cycle is decreased. Stepless speed regulation is realized by adjusting the PWM duty cycle. Compared with gear speed regulation, the convergence is faster, the response is more timely, the temperature control is more stable and accurate, and there will be no jumping gears; the temperature is controlled at the target temperature by using the negative feedback principle Nearby, a balance between temperature control and noise reduction can be achieved.

Description

technical field [0001] The invention belongs to the technical field of fan speed control, and more specifically relates to a method and device for stepless speed regulation of a fan in an electromechanical system. Background technique [0002] Communication devices usually contain a large number of high-performance chips, which generate a lot of heat when they work, causing the temperature of the device to rise. If the temperature control is not good, the performance of the device will be damaged, and the chip will be burned, so the fan cooling system of the communication device is very important. When the temperature of the device is different, the heat dissipation requirements are different. At this time, the fan speed needs to be adjusted according to the temperature of the device to meet the usage requirements. In the traditional fan speed regulation strategy, the fan speed is usually divided into several gears. If the temperature rises above the threshold, the gear wil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D27/00H05K7/20
CPCF04D27/004H05K7/20209
Inventor 林飞浪刘勇刚雷泽宾
Owner FENGHUO COMM SCI & TECH CO LTD
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