US20140072449A1 - Fan control system - Google Patents
Fan control system Download PDFInfo
- Publication number
- US20140072449A1 US20140072449A1 US13/913,619 US201313913619A US2014072449A1 US 20140072449 A1 US20140072449 A1 US 20140072449A1 US 201313913619 A US201313913619 A US 201313913619A US 2014072449 A1 US2014072449 A1 US 2014072449A1
- Authority
- US
- United States
- Prior art keywords
- mosfet
- transistor
- resistor
- fan
- electrically connected
- 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
Links
- 230000017525 heat dissipation Effects 0.000 description 2
Images
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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
- F04D25/0613—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump the electric motor being of the inside-out type, i.e. the rotor is arranged radially outside a central stator
-
- 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 present disclosure relates to a fan control system.
- a heat dissipation apparatus includes a conventional heat sink mounted on a CPU to remove heat, and a fan fixed on the heat sink to generate airflow through the heat dissipation apparatus.
- a conventional fan control system controls rotation speed of the fan by pulse width modulation (PWM) signals from a super I/O chip.
- PWM pulse width modulation
- the fan control system is usually embedded with driving chips and auxiliary circuits, which occupies large amount of space in the fan and increases the costs.
- FIG. 1 is a block view of an embodiment of a fan controlling system.
- FIG. 2 is circuit view of the fan controlling system of FIG. 1 .
- FIG. 1 shows a fan control system includes a motherboard 100 and a fan 200 fixed on the motherboard 100 .
- the motherboard 100 includes an I/O controller 110 and a control circuit 120 electrically connected to the I/O controller 110 .
- the fan 200 includes a motor 210 and a rotation speed detecting chip 220 .
- the I/O controller 110 outputs a rotation speed control signal and a pulse width modulation (PWM) signal.
- the control circuit 120 receives the rotation speed control signal and the PWM signal, and outputs a fan driving signal according to the rotation speed control signal.
- the motor 210 receives the fan driving signal, and drives the fan 200 to rotate in a special rotation speed and direction accordingly.
- the rotation speed detecting chip 220 detects rotation of the fan 200 , and outputs a rotation speed feedback signal according to the rotation speed of the fan 200 .
- the I/O controller 110 receives the rotation speed feedback signal, and adjusts a duty cycle of the PWM signal accordingly to change rotation speed of the fan 200 .
- FIG. 2 shows the I/O controller 110 includes a first control signal output terminal 111 , a second control signal output terminal 112 , a third control signal output terminal 113 , a fourth control signal output terminal 114 , a feedback signal input terminal 115 , and a current signal input terminal 116 .
- the control circuit 120 includes a plurality of transistors T 1 -T 4 , a plurality of resistors R 1 -R 13 , a plurality of MOSFETs Q 1 -Q 4 , and a plurality of diodes D 1 -D 4 .
- the first control signal output terminal 111 receives a first DC voltage via the resistor R 1 .
- the first control signal output terminal 111 is electrically connected to a base of the transistor T 1 via the resistor R 2 .
- An emitter of the transistor T 1 is grounded.
- a collector of the transistor T 1 is electrically connected to a gate of the MOSFET Q 1 .
- the collector of the transistor T 1 receives a second DC voltage via the resistor R 3 .
- a drain of the MOSFET Q 1 receives the second DC voltage.
- the drain of the MOSFET Q 1 is electrically connected to a cathode of the diode D 1 .
- An anode of the diode D 1 is electrically connected to a source of the MOSFET Q 1 .
- the second control signal output terminal 112 receives the first DC voltage via the resistor R 4 .
- the second control signal output terminal 112 is electrically connected to a base of the transistor T 2 via the resistor R 5 .
- An emitter of the transistor T 2 is grounded.
- a collector of the transistor T 2 is electrically connected to a gate of the MOSFET Q 2 .
- the collector of the transistor T 2 receives the second DC voltage via the resistor R 6 .
- a drain of the MOSFET Q 2 receives the second DC voltage.
- the drain of the MOSFET Q 2 is electrically connected to a cathode of the diode D 2 .
- An anode of the diode D 2 is electrically connected to a source of the MOSFET Q 2 .
- the third control signal output terminal 113 receives the first DC voltage via the resistor R 7 .
- the third control signal output terminal 113 is electrically connected to a base of the transistor T 3 via the resistor R 8 .
- An emitter of the transistor T 3 is grounded.
- a collector of the transistor T 3 is electrically connected to a gate of the MOSFET Q 3 .
- the collector of the transistor T 3 receives the second DC voltage via the resistor R 9 .
- a drain of the MOSFET Q 3 is electrically connected to the source of the MOSFET Q 1 .
- the drain of the MOSFET Q 3 is electrically connected to a cathode of the diode D 3 .
- An anode of the diode D 3 is electrically connected to a source of the MOSFET Q 3 .
- the fourth control signal output terminal 114 receives the first DC voltage via the resistor R 10 .
- the fourth control signal output terminal 114 is electrically connected to a base of the transistor T 4 via the resistor R 11 .
- An emitter of the transistor T 4 is grounded.
- a collector of the transistor T 4 is electrically connected to a gate of the MOSFET Q 4 .
- the collector of the transistor T 4 receives the second DC voltage via the resistor R 12 .
- a drain of the MOSFET Q 4 is electrically connected to the source of the MOSFET Q 2 .
- the drain of the MOSFET Q 4 is electrically connected to a cathode of the diode D 4 .
- An anode of the diode D 4 is electrically connected to a source of the MOSFET Q 4 .
- the sources of the MOSFETs Q 3 and Q 4 are electrically connected and grounded via the resistor R 13 .
- the sources of the MOSFETs Q 3 and Q 4 are electrically connected to the current
- the motor 210 includes a first input terminal 211 and a second input terminal 212 .
- the first input terminal 211 is electrically connected to the source of the MOSFET Q 1 and the drain of the MOSFET Q 3 .
- the second input terminal 212 is electrically connected to the source of the MOSFET Q 2 and the drain of the MOSFET Q 4 .
- the rotation speed detecting chip 220 includes a rotation speed signal output terminal 221 and a ground terminal 222 .
- the rotation speed signal output terminal 221 is electrically connected to the feedback signal input terminal 115 .
- the ground terminal 222 is grounded.
- the first DC voltage is a +3V standby voltage.
- the second DC voltage is a +12V voltage.
- the transistors T 1 -T 4 are NPN type transistors.
- the MOSFETs Q 1 -Q 4 are N-channel MOSFETs.
- the transistors T 1 and T 4 turn off.
- the transistors T 2 and T 3 turn on.
- the gates of the MOSFETs Q 1 and Q 4 receive high voltage level second DC voltages.
- the MOSFETs Q 1 and Q 4 turn on.
- the gates of the MOSFETs Q 2 and Q 3 re grounded via the transistors T 2 and T 3 respectively.
- the MOSFETs Q 2 and Q 3 turn off.
- the second DC voltage is input in the first input terminal 211 of the motor 210 via the MOSFET Q 1 , and is output to the MOSFET Q 4 by the second input terminal 212 of the motor 210 .
- the motor 210 is powered on and drives the fan 200 to rotate along a first direction.
- the I/O controller 110 then outputs the PWM signal to adjust an amplitude of the second DC voltage.
- the fan 200 rotates in the corresponding rotation speed according to the second DC voltage along the first direction.
- the transistors T 1 and T 4 turn on.
- the transistors T 2 and T 3 turn off.
- the gates of the MOSFETs Q 2 and Q 3 receive high voltage level second DC voltages.
- the MOSFETs Q 2 and Q 3 turn on.
- the second DC voltage is input in the first input terminal 212 of the motor 210 via the MOSFET Q 2 , and is output to the MOSFET Q 3 by the second input terminal 211 of the motor 210 .
- the motor 210 is powered on and drives the fan 200 to rotate along a second direction in the corresponding rotation speed. In one embodiment, the second direction is opposite to the first direction.
- the rotation speed detecting chip 220 detects the rotation speed of the fan 200 .
- the rotation speed detecting chip 220 outputs the rotation speed feedback signal at the rotation speed signal output terminal 221 .
- the feedback signal input terminal 115 of the I/O controller 110 receives the rotation speed feedback signal.
- the I/O controller 110 adjusts the duty cycle of the PWM signal according to the rotation speed feedback signal.
- the amplitude of the second DC voltage is changed according to the duty cycle of the PWM signal.
- the rotation speed of the fan 200 is then changed.
- the current signal input terminal 116 of the I/O controller 110 collects current signals flowing through the fan 200 .
- the diodes D 1 -D 4 are used to protect the MOSFETs Q 1 -Q 4 .
- the diodes D 1 -D 4 eliminate negative voltages on the MOSFETs Q 1 -Q 4 when the motor 210 is power off.
Abstract
Description
- 1. Technical Field
- The present disclosure relates to a fan control system.
- 2. Description of Related Art
- A heat dissipation apparatus includes a conventional heat sink mounted on a CPU to remove heat, and a fan fixed on the heat sink to generate airflow through the heat dissipation apparatus. A conventional fan control system controls rotation speed of the fan by pulse width modulation (PWM) signals from a super I/O chip. The fan control system is usually embedded with driving chips and auxiliary circuits, which occupies large amount of space in the fan and increases the costs.
- Therefore, there is a need for improvement in the art.
- Many aspects of the embodiments can be better understood with reference to the following drawings. The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the embodiments. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views.
-
FIG. 1 is a block view of an embodiment of a fan controlling system. -
FIG. 2 is circuit view of the fan controlling system ofFIG. 1 . - The disclosure is illustrated by way of example and not by way of limitation in the figures of the accompanying drawings in which like references indicate similar elements. It should be noted that references to “an” or “one” embodiment in this disclosure are not necessarily to the same embodiment, and such references mean “at least one.”
-
FIG. 1 shows a fan control system includes amotherboard 100 and afan 200 fixed on themotherboard 100. Themotherboard 100 includes an I/O controller 110 and acontrol circuit 120 electrically connected to the I/O controller 110. Thefan 200 includes amotor 210 and a rotationspeed detecting chip 220. The I/O controller 110 outputs a rotation speed control signal and a pulse width modulation (PWM) signal. Thecontrol circuit 120 receives the rotation speed control signal and the PWM signal, and outputs a fan driving signal according to the rotation speed control signal. Themotor 210 receives the fan driving signal, and drives thefan 200 to rotate in a special rotation speed and direction accordingly. The rotationspeed detecting chip 220 detects rotation of thefan 200, and outputs a rotation speed feedback signal according to the rotation speed of thefan 200. The I/O controller 110 receives the rotation speed feedback signal, and adjusts a duty cycle of the PWM signal accordingly to change rotation speed of thefan 200. -
FIG. 2 shows the I/O controller 110 includes a first controlsignal output terminal 111, a second controlsignal output terminal 112, a third controlsignal output terminal 113, a fourth controlsignal output terminal 114, a feedbacksignal input terminal 115, and a currentsignal input terminal 116. Thecontrol circuit 120 includes a plurality of transistors T1-T4, a plurality of resistors R1-R13, a plurality of MOSFETs Q1-Q4, and a plurality of diodes D1-D4. - The first control
signal output terminal 111 receives a first DC voltage via the resistor R1. The first controlsignal output terminal 111 is electrically connected to a base of the transistor T1 via the resistor R2. An emitter of the transistor T1 is grounded. A collector of the transistor T1 is electrically connected to a gate of the MOSFET Q1. The collector of the transistor T1 receives a second DC voltage via the resistor R3. A drain of the MOSFET Q1 receives the second DC voltage. The drain of the MOSFET Q1 is electrically connected to a cathode of the diode D1. An anode of the diode D1 is electrically connected to a source of the MOSFET Q1. - The second control
signal output terminal 112 receives the first DC voltage via the resistor R4. The second controlsignal output terminal 112 is electrically connected to a base of the transistor T2 via the resistor R5. An emitter of the transistor T2 is grounded. A collector of the transistor T2 is electrically connected to a gate of the MOSFET Q2. The collector of the transistor T2 receives the second DC voltage via the resistor R6. A drain of the MOSFET Q2 receives the second DC voltage. The drain of the MOSFET Q2 is electrically connected to a cathode of the diode D2. An anode of the diode D2 is electrically connected to a source of the MOSFET Q2. - The third control
signal output terminal 113 receives the first DC voltage via the resistor R7. The third controlsignal output terminal 113 is electrically connected to a base of the transistor T3 via the resistor R8. An emitter of the transistor T3 is grounded. A collector of the transistor T3 is electrically connected to a gate of the MOSFET Q3. The collector of the transistor T3 receives the second DC voltage via the resistor R9. A drain of the MOSFET Q3 is electrically connected to the source of the MOSFET Q1. The drain of the MOSFET Q3 is electrically connected to a cathode of the diode D3. An anode of the diode D3 is electrically connected to a source of the MOSFET Q3. - The fourth control
signal output terminal 114 receives the first DC voltage via the resistor R10. The fourth controlsignal output terminal 114 is electrically connected to a base of the transistor T4 via the resistor R11. An emitter of the transistor T4 is grounded. A collector of the transistor T4 is electrically connected to a gate of the MOSFET Q4. The collector of the transistor T4 receives the second DC voltage via the resistor R12. A drain of the MOSFET Q4 is electrically connected to the source of the MOSFET Q2. The drain of the MOSFET Q4 is electrically connected to a cathode of the diode D4. An anode of the diode D4 is electrically connected to a source of the MOSFET Q4. The sources of the MOSFETs Q3 and Q4 are electrically connected and grounded via the resistor R13. The sources of the MOSFETs Q3 and Q4 are electrically connected to the currentsignal input terminal 116. - The
motor 210 includes afirst input terminal 211 and asecond input terminal 212. Thefirst input terminal 211 is electrically connected to the source of the MOSFET Q1 and the drain of the MOSFET Q3. Thesecond input terminal 212 is electrically connected to the source of the MOSFET Q2 and the drain of the MOSFET Q4. The rotationspeed detecting chip 220 includes a rotation speedsignal output terminal 221 and aground terminal 222. The rotation speedsignal output terminal 221 is electrically connected to the feedbacksignal input terminal 115. Theground terminal 222 is grounded. In one embodiment, the first DC voltage is a +3V standby voltage. The second DC voltage is a +12V voltage. The transistors T1-T4 are NPN type transistors. The MOSFETs Q1-Q4 are N-channel MOSFETs. - In operation, when the I/
O controller 110 outputs low voltage level control signals at the first controlsignal output terminal 111 and the fourth controlsignal output terminal 114, and outputs high voltage level control signals at the second controlsignal output terminal 112 and the third controlsignal output terminal 113, the transistors T1 and T4 turn off. The transistors T2 and T3 turn on. The gates of the MOSFETs Q1 and Q4 receive high voltage level second DC voltages. The MOSFETs Q1 and Q4 turn on. The gates of the MOSFETs Q2 and Q3 re grounded via the transistors T2 and T3 respectively. The MOSFETs Q2 and Q3 turn off. The second DC voltage is input in thefirst input terminal 211 of themotor 210 via the MOSFET Q1, and is output to the MOSFET Q4 by thesecond input terminal 212 of themotor 210. Themotor 210 is powered on and drives thefan 200 to rotate along a first direction. The I/O controller 110 then outputs the PWM signal to adjust an amplitude of the second DC voltage. Thefan 200 rotates in the corresponding rotation speed according to the second DC voltage along the first direction. - When the I/
O controller 110 outputs high voltage level control signals at the first controlsignal output terminal 111 and the fourth controlsignal output terminal 114, and outputs low voltage level control signals at the second controlsignal output terminal 112 and the third controlsignal output terminal 113, the transistors T1 and T4 turn on. The transistors T2 and T3 turn off. The gates of the MOSFETs Q2 and Q3 receive high voltage level second DC voltages. The MOSFETs Q2 and Q3 turn on. The second DC voltage is input in thefirst input terminal 212 of themotor 210 via the MOSFET Q2, and is output to the MOSFET Q3 by thesecond input terminal 211 of themotor 210. Themotor 210 is powered on and drives thefan 200 to rotate along a second direction in the corresponding rotation speed. In one embodiment, the second direction is opposite to the first direction. - When the
fan 200 rotates, the rotationspeed detecting chip 220 detects the rotation speed of thefan 200. The rotationspeed detecting chip 220 outputs the rotation speed feedback signal at the rotation speedsignal output terminal 221. The feedbacksignal input terminal 115 of the I/O controller 110 receives the rotation speed feedback signal. The I/O controller 110 adjusts the duty cycle of the PWM signal according to the rotation speed feedback signal. The amplitude of the second DC voltage is changed according to the duty cycle of the PWM signal. The rotation speed of thefan 200 is then changed. Meanwhile, the currentsignal input terminal 116 of the I/O controller 110 collects current signals flowing through thefan 200. In one embodiment, the diodes D1-D4 are used to protect the MOSFETs Q1-Q4. The diodes D1-D4 eliminate negative voltages on the MOSFETs Q1-Q4 when themotor 210 is power off. - Even though numerous characteristics and advantages of the present disclosure have been set forth in the foregoing description, together with details of the structure and function of the disclosure, the disclosure is illustrative only, and changes may be made in detail, especially in the matters of shape, size, and the arrangement of parts within the principles of the disclosure to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.
Claims (16)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2012103357789 | 2012-09-12 | ||
CN201210335778.9A CN103671183A (en) | 2012-09-12 | 2012-09-12 | Computer fan control system |
Publications (1)
Publication Number | Publication Date |
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US20140072449A1 true US20140072449A1 (en) | 2014-03-13 |
Family
ID=50233461
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/913,619 Abandoned US20140072449A1 (en) | 2012-09-12 | 2013-06-10 | Fan control system |
Country Status (3)
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US (1) | US20140072449A1 (en) |
CN (1) | CN103671183A (en) |
TW (1) | TW201411320A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140211353A1 (en) * | 2013-01-28 | 2014-07-31 | Hon Hai Precision Industry Co., Ltd. | Protection circuit for fan control chip |
JP2016144344A (en) * | 2015-02-03 | 2016-08-08 | 平田機工株式会社 | Control apparatus, robot, and control method |
CN106321478A (en) * | 2015-06-22 | 2017-01-11 | 鸿富锦精密工业(武汉)有限公司 | Fan control system |
CN109505791A (en) * | 2018-06-27 | 2019-03-22 | 成都富强电子电器科技有限公司 | A kind of fire-fighting Double Speed Fan intelligent controller |
US20220066421A1 (en) * | 2020-08-31 | 2022-03-03 | Sea Sonic Electronics Co., Ltd. | Fan driving circuit with temperature compensation |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI699633B (en) * | 2019-06-12 | 2020-07-21 | 英業達股份有限公司 | Method for controlling rotational speed of device |
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US20040247449A1 (en) * | 2002-07-12 | 2004-12-09 | Wen-Chuan Ma | Fan control system using a microcontroller |
US20110175562A1 (en) * | 2010-01-20 | 2011-07-21 | Hong Fu Jin Precision Industry (Shenzhen)Co., Ltd. | Fan circuit |
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US6731082B2 (en) * | 2002-03-13 | 2004-05-04 | Pelko Electric (Hk) Ltd. | DC motor constant speed PWM control |
CN101063887A (en) * | 2006-04-27 | 2007-10-31 | 环达电脑(上海)有限公司 | Method for controlling rotate speed of computer cooling fan and system thereof |
CN102042248B (en) * | 2009-10-10 | 2014-06-04 | 建准电机工业股份有限公司 | Control system for fan |
CN102116304A (en) * | 2010-01-05 | 2011-07-06 | 建准电机工业股份有限公司 | Fan system and brake circuit thereof |
CN102192175A (en) * | 2010-03-01 | 2011-09-21 | 纬创资通股份有限公司 | Fan control system and method for modulating rotation speed of fan |
JP2011205744A (en) * | 2010-03-24 | 2011-10-13 | On Semiconductor Trading Ltd | Motor drive circuit and lighting system |
CN101819456B (en) * | 2010-04-15 | 2012-04-25 | 鲁东大学 | Method for reducing dust on cooling fan blades of computer and circuit for realizing same |
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2012
- 2012-09-12 CN CN201210335778.9A patent/CN103671183A/en active Pending
- 2012-09-21 TW TW101134855A patent/TW201411320A/en unknown
-
2013
- 2013-06-10 US US13/913,619 patent/US20140072449A1/en not_active Abandoned
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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US20040247449A1 (en) * | 2002-07-12 | 2004-12-09 | Wen-Chuan Ma | Fan control system using a microcontroller |
US20110175562A1 (en) * | 2010-01-20 | 2011-07-21 | Hong Fu Jin Precision Industry (Shenzhen)Co., Ltd. | Fan circuit |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140211353A1 (en) * | 2013-01-28 | 2014-07-31 | Hon Hai Precision Industry Co., Ltd. | Protection circuit for fan control chip |
JP2016144344A (en) * | 2015-02-03 | 2016-08-08 | 平田機工株式会社 | Control apparatus, robot, and control method |
CN106321478A (en) * | 2015-06-22 | 2017-01-11 | 鸿富锦精密工业(武汉)有限公司 | Fan control system |
CN109505791A (en) * | 2018-06-27 | 2019-03-22 | 成都富强电子电器科技有限公司 | A kind of fire-fighting Double Speed Fan intelligent controller |
US20220066421A1 (en) * | 2020-08-31 | 2022-03-03 | Sea Sonic Electronics Co., Ltd. | Fan driving circuit with temperature compensation |
US11567477B2 (en) * | 2020-08-31 | 2023-01-31 | Sea Sonic Electronics Co., Ltd. | Fan driving circuit with temperature compensation |
Also Published As
Publication number | Publication date |
---|---|
TW201411320A (en) | 2014-03-16 |
CN103671183A (en) | 2014-03-26 |
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Owner name: HONG FU JIN PRECISION INDUSTRY (WUHAN) CO., LTD., Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:YAO, ZHI-JIANG;GAO, WEN-CHANG;REEL/FRAME:030576/0460 Effective date: 20130605 Owner name: HON HAI PRECISION INDUSTRY CO., LTD., TAIWAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:YAO, ZHI-JIANG;GAO, WEN-CHANG;REEL/FRAME:030576/0460 Effective date: 20130605 |
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