US20170022995A1 - Fan control circuit and an electronic device using the same - Google Patents

Fan control circuit and an electronic device using the same Download PDF

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Publication number
US20170022995A1
US20170022995A1 US14/808,813 US201514808813A US2017022995A1 US 20170022995 A1 US20170022995 A1 US 20170022995A1 US 201514808813 A US201514808813 A US 201514808813A US 2017022995 A1 US2017022995 A1 US 2017022995A1
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United States
Prior art keywords
fan
timer
power supply
input
output
Prior art date
Legal status (The legal status 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 status listed.)
Abandoned
Application number
US14/808,813
Inventor
Lei Liu
Guo-Yi Chen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hongfujin Precision Electronics Tianjin Co Ltd
Original Assignee
Hongfujin Precision Industry Shenzhen Co Ltd
Hon Hai Precision Industry Co Ltd
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 Hongfujin Precision Industry Shenzhen Co Ltd, Hon Hai Precision Industry Co Ltd filed Critical Hongfujin Precision Industry Shenzhen Co Ltd
Priority to US14/808,813 priority Critical patent/US20170022995A1/en
Assigned to HON HAI PRECISION INDUSTRY CO., LTD., HONG FU JIN PRECISION INDUSTRY (SHENZHEN) CO., LTD. reassignment HON HAI PRECISION INDUSTRY CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CHEN, Guo-yi, LIU, LEI
Publication of US20170022995A1 publication Critical patent/US20170022995A1/en
Assigned to HONGFUJIN PRECISION ELECTRONICS(TIANJIN)CO.,LTD. reassignment HONGFUJIN PRECISION ELECTRONICS(TIANJIN)CO.,LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HON HAI PRECISION INDUSTRY CO., LTD., HONG FU JIN PRECISION INDUSTRY (SHENZHEN) CO., LTD.
Abandoned legal-status Critical Current

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    • 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
    • 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 subject matter herein generally relates to an electronic device with a fan control circuit.
  • a power supply stops supplying power for fans when a server is shut down.
  • the FIGURE is a block diagram of an embodiment of an electronic device with a fan control circuit.
  • Coupled is defined as connected, whether directly or indirectly through intervening components, and is not necessarily limited to physical connections.
  • the connection can be such that the objects are permanently connected or releasably connected.
  • comprising when utilized, means “including, but not necessarily limited to”; it specifically indicates open-ended inclusion or membership in the so-described combination, group, series and the like.
  • the FIGURE shows an embodiment of a fan control circuit 100 applied in an electronic device 200 .
  • the fan control circuit 100 can comprise a fan 20 , a baseboard management controller (BMC) 30 , a timer 40 , a power supply 50 , and a voltage converter 60 .
  • the fan control circuit 100 can be set in a server.
  • the BMC 30 can comprise an output O 1 .
  • the output O 1 is configured to output a power wide management (PWM) signal to control the fan 20 .
  • PWM power wide management
  • the fan 20 can comprise a control terminal C and a power terminal P.
  • the control terminal C is configured to receive the PWM signal.
  • the power terminal P is configured to receive a voltage. The fan operates normally when the fan receives the PWM signal and the voltage.
  • the timer 40 can comprise a first input I 1 and a second input I 2 .
  • the power supply 50 can comprise a first output O 3 and a second output O 4 .
  • the first input I 1 of the timer 40 is coupled to the output O 1 of the BMC 40 to receive the PWM signal.
  • the second input I 2 of the timer 40 is coupled to the second output O 4 of the power supply 50 .
  • An output O 2 of the timer 40 is coupled to the control terminal C of the fan 20 to transmit the PWM signal.
  • the first input I 1 of the timer 40 is coupled to the output O 2 of the timer 40 .
  • the second input I 2 turns into a low level, a connection between the first input I 1 and the output O 2 would be disconnected after a preset time.
  • the first output O 3 of the power supply 50 is coupled to an anode of a diode D.
  • a cathode of the diode D is coupled to the power terminal P of the fan 20 .
  • the diode D is configured to protect the power supply 50 .
  • An input I 2 of the voltage converter 60 is coupled to the second output O 4 of the power supply 50 .
  • An output O 5 of the voltage converter 60 is coupled to the power terminal P of the fan 20 and the cathode of the diode D.
  • the power supply When the server is operating, the power supply outputs a first voltage through the second output O 4 .
  • the first voltage is 12 volt (V) in this embodiment.
  • the second input I 2 of the timer 40 is at a high level and the timer 40 transmits the PWM signal from the BMC 30 to the control terminal C of the fan 20 .
  • the input 13 of the voltage converter 60 receives the first voltage.
  • the voltage converter 60 converts the first voltage into a second voltage.
  • the voltage converter outputs the second voltage to the power terminal P of the fan 20 through the output O 5 .
  • the second voltage is 5 V.
  • the fan 20 operates normally when the fan 20 receives the PWM signal and the second voltage synchronously.
  • the BMC 30 When the server stops operating, the BMC 30 outputs a constant PWM signal.
  • the power supply 50 stops outputting the first voltage through the second output O 4 , and starts outputting a third voltage through the first output O 3 .
  • the third voltage is an auxiliary voltage of 5 V.
  • the second input I 2 of the timer 40 is at a low level.
  • the timer 40 starts timing and continues to transmit the PWM signal to the control terminal C of the fan 20 in a preset time.
  • the fan 20 receives the PWM signal and the second voltage synchronously.
  • the timer 40 stops transmitting the PWM signal to the fan 20 after the preset time.
  • the power supply 50 when the server is operating, the power supply 50 outputs the first voltage through the second output O 4 and outputs the third voltage to the power terminal P of the fan 20 through the first output O 3 at the same time.

Abstract

A fan control circuit set in an electronic device, the fan control circuit includes a fan, a controller, a power supply, and a timer. The fan operates normally when the fan receives a control signal and a voltage. The controller outputs the control signal. The power supply supplies power. The timer is coupled between the fan, the controller, and the power supply. A first input of the timer is coupled to the controller to receive the control signal. When a second input of the timer receives a first signal from the power supply, the first input of the timer is coupled to an output of the timer. When the second input of the timer receives a second signal from the power supply, the second input of the timer is disconnected from the output of the timer after a preset time.

Description

    FIELD
  • The subject matter herein generally relates to an electronic device with a fan control circuit.
    • BACKGROUND
  • A power supply stops supplying power for fans when a server is shut down.
    • BRIEF DESCRIPTION OF THE DRAWING
  • Implementations of the present technology will now be described, by way of example only, with reference to the attached FIGURE.
  • The FIGURE is a block diagram of an embodiment of an electronic device with a fan control circuit.
    •  DETAILED DESCRIPTION
  • Numerous specific details are set forth in order to provide a thorough understanding of the embodiments described herein. However, it will be understood by those of ordinary skill in the art that the embodiments described herein can be practiced without these specific details. In other instances, methods, procedures, and components have not been described in detail so as not to obscure the related relevant feature being described. Also, the description is not to be considered as limiting the scope of the embodiments described herein.
  • Several definitions that apply throughout this disclosure will now be presented.
  • The term “coupled” is defined as connected, whether directly or indirectly through intervening components, and is not necessarily limited to physical connections. The connection can be such that the objects are permanently connected or releasably connected. The term “comprising” when utilized, means “including, but not necessarily limited to”; it specifically indicates open-ended inclusion or membership in the so-described combination, group, series and the like.
  • The FIGURE shows an embodiment of a fan control circuit 100 applied in an electronic device 200. The fan control circuit 100 can comprise a fan 20, a baseboard management controller (BMC) 30, a timer 40, a power supply 50, and a voltage converter 60. The fan control circuit 100 can be set in a server.
  • The BMC 30 can comprise an output O1. The output O1 is configured to output a power wide management (PWM) signal to control the fan 20.
  • The fan 20 can comprise a control terminal C and a power terminal P. The control terminal C is configured to receive the PWM signal. The power terminal P is configured to receive a voltage. The fan operates normally when the fan receives the PWM signal and the voltage.
  • The timer 40 can comprise a first input I1 and a second input I2. The power supply 50 can comprise a first output O3 and a second output O4. The first input I1 of the timer 40 is coupled to the output O1 of the BMC 40 to receive the PWM signal. The second input I2 of the timer 40 is coupled to the second output O4 of the power supply 50. An output O2 of the timer 40 is coupled to the control terminal C of the fan 20 to transmit the PWM signal.
  • When the second input I2 is at a high level, the first input I1 of the timer 40 is coupled to the output O2 of the timer 40. When the second input I2 turns into a low level, a connection between the first input I1 and the output O2 would be disconnected after a preset time.
  • The first output O3 of the power supply 50 is coupled to an anode of a diode D. A cathode of the diode D is coupled to the power terminal P of the fan 20. The diode D is configured to protect the power supply 50.
  • An input I2 of the voltage converter 60 is coupled to the second output O4 of the power supply 50. An output O5 of the voltage converter 60 is coupled to the power terminal P of the fan 20 and the cathode of the diode D.
  • When the server is operating, the power supply outputs a first voltage through the second output O4. The first voltage is 12 volt (V) in this embodiment. The second input I2 of the timer 40 is at a high level and the timer 40 transmits the PWM signal from the BMC 30 to the control terminal C of the fan 20. The input 13 of the voltage converter 60 receives the first voltage. The voltage converter 60 converts the first voltage into a second voltage. The voltage converter outputs the second voltage to the power terminal P of the fan 20 through the output O5.
  • In the embodiment, the second voltage is 5 V. The fan 20 operates normally when the fan 20 receives the PWM signal and the second voltage synchronously.
  • When the server stops operating, the BMC 30 outputs a constant PWM signal. The power supply 50 stops outputting the first voltage through the second output O4, and starts outputting a third voltage through the first output O3. In the embodiment the third voltage is an auxiliary voltage of 5 V. The second input I2 of the timer 40 is at a low level. The timer 40 starts timing and continues to transmit the PWM signal to the control terminal C of the fan 20 in a preset time. The fan 20 receives the PWM signal and the second voltage synchronously. The timer 40 stops transmitting the PWM signal to the fan 20 after the preset time.
  • In other embodiments, when the server is operating, the power supply 50 outputs the first voltage through the second output O4 and outputs the third voltage to the power terminal P of the fan 20 through the first output O3 at the same time.
  • While the disclosure has been described by way of example and in terms of the embodiment, it is to be understood that the disclosure is not limited thereto. On the contrary, it is intended to cover various modifications and similar arrangements as would be apparent to those skilled in the art. Therefore, the range of the appended claims should be accorded the broadest interpretation so as to encompass all such modifications and similar arrangements.

Claims (10)

What is claimed is:
1. A fan control circuit comprising:
a fan configured to operate normally in event the fan receives a control signal and power;
a controller configured to output the control signal;
a power supply configured to supply power;
a timer coupled to the fan and the power supply, the timer comprising a first input and a second input, the first input coupled to the controller and configured to receive the control signal;
wherein when a second input of the timer receives a first signal from the power supply, the first input of the timer is coupled to an output of the timer; when the second input of the timer receives a second signal from the power supply, the first input of the timer is disconnected from the output of the timer after a preset time.
2. The fan control circuit as claim 1, wherein the controller is a baseboard management controller.
3. The fan control circuit as claim 1, wherein the control signal is a pulse-width modulation signal.
4. The fan control circuit as claim 1, wherein a first output of the power supply is coupled to a power terminal of the fan, a second output of the power supply is coupled to the second input of the timer.
5. The fan control circuit as claim 4, further comprising a voltage converter, an input of the voltage converter is coupled to the second output of the power supply, an output of the voltage converter is coupled to the power terminal of the fan, wherein when the electronic device is operating, the power supply outputs a first voltage which is at a high level to the voltage converter, the voltage converter converts the first voltage into a second voltage and outputs the second voltage to the power terminal of the fan, when the electronic device stops operating, the power supply outputs the second voltage to the fan through the first output.
6. An electronic device comprising a fan control circuit, the fan control circuit comprising:
a fan operating normally when the fan receives a control signal and a voltage;
a controller configured to output the control signal;
a power supply configured to supply power;
a timer coupled to the fan and the power supply, wherein a first input of the timer is coupled to the controller to receive the control signal, when a second input of the timer receives a first signal from the power supply, the first input of the timer is coupled to an output of the timer;
when the second input of the timer receives a second signal from the power supply, the first input of the timer is disconnected from the output of the timer after a preset time.
7. The electronic device as claim 6, wherein the controller is a baseboard management controller.
8. The electronic device as claim 6, wherein the control signal is a pulse-width modulation signal.
9. The electronic device as claim 6, wherein a first output of the power supply is coupled to a power terminal of the fan, a second output of the power supply is coupled to the second input of the timer.
10. The electronic device as claim 9, further comprising a voltage converter, an input of the voltage converter is coupled to the second output of the power supply, an output of the voltage converter is coupled to the power terminal of the fan, wherein when the electronic device is operating, the power supply outputs a first voltage which is at a high level to the voltage converter, the voltage converter converts the first voltage into a second voltage and outputs the second voltage to the power terminal of the fan, when the electronic device stops operating, the power supply outputs the second voltage to the fan through the first output.
US14/808,813 2015-07-24 2015-07-24 Fan control circuit and an electronic device using the same Abandoned US20170022995A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US14/808,813 US20170022995A1 (en) 2015-07-24 2015-07-24 Fan control circuit and an electronic device using the same

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Application Number Priority Date Filing Date Title
US14/808,813 US20170022995A1 (en) 2015-07-24 2015-07-24 Fan control circuit and an electronic device using the same

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US20170022995A1 true US20170022995A1 (en) 2017-01-26

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10939593B2 (en) 2019-04-29 2021-03-02 The Esab Group Inc. Power supply fan management

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7746016B2 (en) * 2006-11-03 2010-06-29 Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. Fan controller

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7746016B2 (en) * 2006-11-03 2010-06-29 Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. Fan controller

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10939593B2 (en) 2019-04-29 2021-03-02 The Esab Group Inc. Power supply fan management
US11758701B2 (en) 2019-04-29 2023-09-12 The Esab Group, Inc. Power supply fan management

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AS Assignment

Owner name: HON HAI PRECISION INDUSTRY CO., LTD., TAIWAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:LIU, LEI;CHEN, GUO-YI;REEL/FRAME:036174/0057

Effective date: 20150723

Owner name: HONG FU JIN PRECISION INDUSTRY (SHENZHEN) CO., LTD

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:LIU, LEI;CHEN, GUO-YI;REEL/FRAME:036174/0057

Effective date: 20150723

AS Assignment

Owner name: HONGFUJIN PRECISION ELECTRONICS(TIANJIN)CO.,LTD.,

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HONG FU JIN PRECISION INDUSTRY (SHENZHEN) CO., LTD.;HON HAI PRECISION INDUSTRY CO., LTD.;REEL/FRAME:045501/0324

Effective date: 20180112

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION