WO2011147235A1 - Dispositif et procédé de régulation de la vitesse d'un ventilateur - Google Patents

Dispositif et procédé de régulation de la vitesse d'un ventilateur Download PDF

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Publication number
WO2011147235A1
WO2011147235A1 PCT/CN2011/072994 CN2011072994W WO2011147235A1 WO 2011147235 A1 WO2011147235 A1 WO 2011147235A1 CN 2011072994 W CN2011072994 W CN 2011072994W WO 2011147235 A1 WO2011147235 A1 WO 2011147235A1
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WO
WIPO (PCT)
Prior art keywords
fan
control signal
speed
signal
level
Prior art date
Application number
PCT/CN2011/072994
Other languages
English (en)
Chinese (zh)
Inventor
赵琰
Original Assignee
刘建
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 刘建 filed Critical 刘建
Publication of WO2011147235A1 publication Critical patent/WO2011147235A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/004—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying driving speed
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
    • H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
    • H02P7/18—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power
    • H02P7/24—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices
    • H02P7/28—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices
    • H02P7/285—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only
    • H02P7/29—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only using pulse modulation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Definitions

  • the invention relates to a heat dissipation technology, and in particular to a device and a method for fan speed regulation. Background technique
  • the integration of boards in the communication field is getting higher and higher, and the system equipment is getting smaller and smaller, especially when the board is working at high power, the heat dissipation problem in the equipment becomes relatively prominent.
  • the fan has been widely used as an effective heat dissipation tool.
  • the wind speed of the fan is larger, the heat dissipation effect is stronger, but the high wind speed also increases the noise power of the strong noise source of the fan exponentially, and increases the power consumption of the system, and the long-term operation of the fan in the full speed mode also reduces the life. Therefore, how to adjust the fan speed simply and effectively becomes an important part of the circuit design.
  • the main solution for the existing fan speed regulation is: For the fan with the speed control signal line, the control terminal outputs the speed control pulse width modulation (PWM, Pulse Width Modulation, referred to as pulse width modulation) signal to directly adjust the speed of the fan.
  • PWM pulse width modulation
  • the fan voltage is mainly controlled to achieve the purpose of speed regulation.
  • an adjustable power supply is designed to supply power to the fan, or a resistor divider is used to achieve
  • the main object of the present invention is to provide a device and method for fan speed regulation, which can make the fan speed regulation simple, reduce the cost, and reduce the power consumption.
  • a device for fan speed regulation comprising: The switching unit is configured to perform level conversion on the input control signal; and the switch control unit is configured to control the fan power supply on and off according to the signal output by the level conversion unit.
  • the fan is a 2-wire fan or a 3-wire fan (a fan without a dedicated speed-regulating signal line).
  • a processor unit is further included for generating a control signal.
  • the level conversion unit includes a triode and a power source.
  • the switch control unit includes a MOS transistor, and the power supply of the MOS transistor and the fan are connected in series.
  • control signal is a pulse width modulation signal with adjustable duty ratio.
  • the processor unit outputs a speed control signal according to the current device state, and the speed control signal includes a pulse width modulation signal with an adjustable duty ratio.
  • the duty ratio is set according to the level of the device temperature.
  • the time the fan is powered is proportional to the duty cycle of the low level of the pulse width modulated signal.
  • a method for fan speed regulation including: a processor unit generates a control signal and sends the control signal to a level conversion unit; and the level conversion unit level-transforms the input control signal to The switch control unit controls the fan power on and off according to the signal output by the level conversion unit.
  • the processor unit outputs a speed control signal according to the current device state, and the speed control signal includes a pulse width modulation signal with an adjustable duty ratio.
  • the device and method for fan speed control provided by the present invention are simple to implement, low in power consumption, low in cost, and capable of designing various speed gear positions according to requirements, and the speed adjustment is accurate and the effect is good.
  • FIG. 1 is a schematic view of a fan speed control device according to an embodiment of the invention.
  • FIG. 2 is a schematic circuit diagram of a fan speed control device according to an embodiment of the invention
  • FIG. 3 is a schematic diagram of speed regulation of multiple fans according to an embodiment of the invention
  • FIG. 4 is a flowchart of a fan speed control method according to an embodiment of the present invention.
  • FIG. 5 is a graphical representation of duty cycle in accordance with an embodiment of the present invention. detailed description
  • the invention provides a fan speed regulating device, which comprises a level converting unit for level-switching an input control signal, and a switch control unit for controlling a fan power source to be turned on and off according to a signal output by the level converting unit, the switch control unit Connect in series to the fan power supply.
  • the fan speed control signal is input to the level conversion unit, and the level conversion unit adjusts the level of the control signal and inputs it to the switch control unit.
  • the switch control unit continuously controls the fan power supply according to the control signal to achieve the purpose of controlling the fan speed.
  • the speed can also be adjusted by the duty cycle of the control signal.
  • the control signal duty cycle is shown in Figure 5.
  • the control signal refers to the PWM signal. This is a square wave signal.
  • the ratio of the square wave positive level time to the square wave cycle time is the duty cycle, and the square wave period is constant.
  • the level time can be controlled by the processor, which controls the duty cycle.
  • FIG. 1 is a schematic diagram of a fan speed control device according to an embodiment of the invention.
  • the control signal is a speed control signal output by the device controller according to the current working environment state.
  • the device controller is as shown in the processor unit of FIG. 1 , and the PWM control signal can be generated by the PWM control signal.
  • the current temperature is controlled.
  • the control signals are generally PWM square wave signals with adjustable duty cycles. Different duty cycles correspond to different speeds.
  • System equipment (such as base station system) can customize the speed gear position according to requirements, such as below 0 degrees, output 30 %
  • the duty cycle PWM is 1st gear; when 0 degrees to 25 degrees, the PWM output 50% duty cycle is 2nd gear.
  • the speed regulation PWM signal is sent to the level conversion unit, and the level conversion unit converts the level amplitude of the PWM signal, adjusts to a level suitable for the switch control unit, and maintains the duty ratio of the original PWM signal.
  • the level-converted control signal is sent to the switch control unit, and the switch control unit continuously turns on and off the power of the fan according to the control signal, and the on or off time is controlled by the duty ratio of the PWM control signal.
  • the level conversion unit consists of a triode and a corresponding power supply.
  • the switch control unit consists of a MOS tube connected in series to the fan's power supply.
  • the triode works in the saturation region or the cut-off region.
  • the control signal is high, the transistor BE is turned on.
  • the CE conduction turns the MOS transistor G to the low level, the MOS transistor is turned off, the fan power is turned off, and the control signal is low.
  • the transistor CE is cut off, and the G pole of the MOS transistor is pulled up to VCC. At this time, the MOS transistor is turned on, and the fan is normally powered.
  • the power supply time of the fan is proportional to the duty cycle of the low level of the PWM control signal, that is, the speed of the fan is proportional to the duty cycle of the low level of the control signal.
  • Figure 3 is an application diagram for controlling a plurality of fans.
  • the 2-wire, 3-wire, and 4-wire fans mean that the fan has several signal lines defined by the model.
  • the two wires represent two power cables (one positive and one negative); the three wires represent two power cables.
  • a status signal line; 4 lines represent two power lines, one status line, one 4 ⁇ control signal line.
  • a 2-wire fan is a fan with only two power cables. There is no dedicated speed signal line and status signal line.
  • the 4-wire fan refers to two power lines, one speed control line, and one speed status line. In the system, two types of fans are often used at the same time, and the speed control is required at the same time.
  • the speed signal of the same duty ratio is sent.
  • the 4-wire fan the signal can be directly sent to the fan for speed control through the control signal line.
  • the speed-adjusting signal is sent to the switch control unit after level conversion.
  • the switch control unit can adjust the speed of all 2-wire fans that need speed regulation.
  • the switch control unit is connected in series to the total power supply of the 2-wire fan. . In this way, the system only needs to provide a unified speed control signal to adjust the speed of multiple fans at the same time.
  • a method for fan speed regulation includes the following steps:
  • Step 100 The processor unit generates a control signal and sends the control signal to the level conversion unit.
  • Step 102 The level conversion unit performs level conversion on the input control signal and sends the control signal to the switch control unit.
  • Step 104 The switch control unit controls the fan power supply to be turned on according to a signal output from the level conversion unit.
  • the level conversion unit is composed of a triode and a power source
  • the switch control unit is composed of a MOS tube
  • the power supply of the MOS tube and the fan are connected in series
  • the processor unit outputs a speed control signal according to the current device state
  • the speed control signal includes
  • the pulse width modulation signal with adjustable duty cycle the duty ratio is set according to the temperature of the device, and the time when the fan is powered is proportional to the duty ratio of the low level of the pulse width modulation signal.
  • the device and method for fan speed control provided by the present invention are simple to implement, low in power consumption, low in cost, and capable of designing multiple speed gear positions as needed. The speed is adjusted accurately and the effect is good.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Electric Motors In General (AREA)
  • Control Of Positive-Displacement Air Blowers (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)

Abstract

Le dispositif et le procédé de régulation de la vitesse d'un ventilateur selon l'invention comprennent : une unité de conversion de niveau électrique utilisée pour effectuer une conversion de niveau électrique sur un signal de commande d'entrée, et une unité de commande de commutation utilisée pour commander la puissance du ventilateur pour activer ou couper selon le signal produit par l'unité de conversion de niveau électrique. Le dispositif et le procédé sont faciles à réaliser, avec une faible consommation et un coût réduit, et permettent d'obtenir des paliers de vitesse de rotation qui peuvent réguler avec précision la vitesse et obtenir un bon effet selon les besoins.
PCT/CN2011/072994 2010-05-26 2011-04-19 Dispositif et procédé de régulation de la vitesse d'un ventilateur WO2011147235A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201010185280.X 2010-05-26
CN201010185280XA CN102261343A (zh) 2010-05-26 2010-05-26 一种风扇调速的装置及方法

Publications (1)

Publication Number Publication Date
WO2011147235A1 true WO2011147235A1 (fr) 2011-12-01

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CN (1) CN102261343A (fr)
WO (1) WO2011147235A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103793039A (zh) * 2012-10-31 2014-05-14 鸿富锦精密工业（深圳）有限公司 处理器温度控制系统及方法
CN104279175A (zh) * 2013-07-10 2015-01-14 鼎点视讯科技有限公司 风扇控制方法、装置及系统
CN106054077A (zh) * 2016-07-08 2016-10-26 珠海格力电器股份有限公司 一种调速电压切换电路及电源板
CN106286370A (zh) * 2016-10-27 2017-01-04 郑州云海信息技术有限公司 一种优化风扇转速监控精度的方法
CN107842520B (zh) * 2017-11-27 2023-07-11 卫星电子（中山）有限公司 一种便于单元更换的风扇控制系统
CN108988700A (zh) * 2018-07-03 2018-12-11 珠海格力电器股份有限公司 一种转速调节装置、电机及其转速调节方法
CN110285086B (zh) 2019-05-09 2020-09-04 苏州浪潮智能科技有限公司 一种风扇控制系统、方法及服务器

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993014559A1 (fr) * 1992-01-21 1993-07-22 Nartron Corporation Circuit de puissance a modulation de largeur d'impulsions
EP1191243A2 (fr) * 2000-09-12 2002-03-27 Ebara Corporation Dispositif de palier magnétique à réponse rapide
CN1699758A (zh) * 2004-05-18 2005-11-23 精拓科技股份有限公司 智慧型风扇转速控制的方法与系统
CN2828890Y (zh) * 2005-10-25 2006-10-18 杭州华为三康技术有限公司 一种风扇调速控制电路
US20070216458A1 (en) * 2003-09-09 2007-09-20 Chun-Lung Chiu Pwm buffer circuit for adjusting a frequency and a duty cycle of a pwm signal
US7479753B1 (en) * 2004-02-24 2009-01-20 Nvidia Corporation Fan speed controller
CN101425770A (zh) * 2008-11-28 2009-05-06 朱鸽 直流电机无级调速器
CN101477391A (zh) * 2008-01-04 2009-07-08 鸿富锦精密工业（深圳）有限公司 电脑风扇控制电路

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993014559A1 (fr) * 1992-01-21 1993-07-22 Nartron Corporation Circuit de puissance a modulation de largeur d'impulsions
EP1191243A2 (fr) * 2000-09-12 2002-03-27 Ebara Corporation Dispositif de palier magnétique à réponse rapide
US20070216458A1 (en) * 2003-09-09 2007-09-20 Chun-Lung Chiu Pwm buffer circuit for adjusting a frequency and a duty cycle of a pwm signal
US7479753B1 (en) * 2004-02-24 2009-01-20 Nvidia Corporation Fan speed controller
CN1699758A (zh) * 2004-05-18 2005-11-23 精拓科技股份有限公司 智慧型风扇转速控制的方法与系统
CN2828890Y (zh) * 2005-10-25 2006-10-18 杭州华为三康技术有限公司 一种风扇调速控制电路
CN101477391A (zh) * 2008-01-04 2009-07-08 鸿富锦精密工业（深圳）有限公司 电脑风扇控制电路
CN101425770A (zh) * 2008-11-28 2009-05-06 朱鸽 直流电机无级调速器

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