CN108449005A - A kind of fan electrical current detecting system - Google Patents
A kind of fan electrical current detecting system Download PDFInfo
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- CN108449005A CN108449005A CN201810316906.2A CN201810316906A CN108449005A CN 108449005 A CN108449005 A CN 108449005A CN 201810316906 A CN201810316906 A CN 201810316906A CN 108449005 A CN108449005 A CN 108449005A
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- fan
- operational amplifier
- resistance
- line end
- rotating speed
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Classifications
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- 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
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/02—Providing protection against overload without automatic interruption of supply
- H02P29/024—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load
- H02P29/027—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load the fault being an over-current
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
Abstract
The present invention relates to a kind of fan electrical current detecting systems, including power supply, fan governor and fan, power supply to be connect respectively with fan governor and fan；The fan is equipped with the first line end, the second line end and third line end, and fan governor is equipped with rotating speed input interface, and rotating speed input interface is connect with the first line end of fan；The second line end of fan is connected with operational amplifier by sampling resistor, and the output end of operational amplifier is connected with BMC module；Fan governor is additionally provided with drive control interface, and the drive control interface is connected with fan-driving module, the third line end connection of the fan-driving module and fan.
Description
Technical field
The invention belongs to server fan control technology fields, and in particular to a kind of fan electrical current detecting system and detecting side
Method.
Background technology
Efficiency day of recent decades server increases with the moon, and the consumption of energy also and then increases, heat dissipation problem also opposite disease
Hand, the necessity for allowing system to maintain its operating temperature just and have its certain, at this time fan just occupy in this link certain important
Property, the indirect stability for influencing whole system of disability of fan, gently then system effectiveness reduces, heavy then whole system delay machine.This
For in place of the deficiencies in the prior art.
Invention content
It is an object of the present invention to design a kind of fan electrical current detecting in view of the above-mentioned drawbacks of the prior art, providing
System, to solve the above technical problems.
In order to achieve the above object, the technical scheme is that：
A kind of fan electrical current detecting system, including power supply, fan governor and fan, power supply respectively with fan governor and fan
Connection；The fan is equipped with the first line end, the second line end and third line end, and fan governor is equipped with rotating speed input interface, rotating speed
Input interface is connect with the first line end of fan；The second line end of fan is connected with operational amplifier, operation amplifier by sampling resistor
The output end of device is connected with BMC module；
Fan governor is additionally provided with drive control interface, and the drive control interface is connected with fan-driving module, the fan
The third line end of drive module and fan connects.
Preferably, fan includes the first fan and the second fan, and operational amplifier includes the first operational amplifier and second
Operational amplifier, sampling resistor include first resistor and second resistance, rotating speed input interface include the first rotating speed input interface and
Second rotating speed input interface；
First rotating speed input interface is connect with first the first line end of fan, and the second line end of the first fan passes through first resistor and the
The input terminal of one operational amplifier connects, and the output end of the first operational amplifier is connected to BMC module, the first fan third line end
It is connected to fan-driving module, the first fan third line end is also associated with the anode of diode, the cathode of diode and the first wind
The second line end connection of fan；
Fan-driving module is also connect with the third line end of the second fan, and the first line end and the input of the second rotating speed of the second fan connect
Mouth connection, the second line end of the second fan are connected to the input terminal of second operational amplifier by second resistance, and the second operation is put
The output end of big device is connected to BMC module.
Preferably, the fan-driving module includes field-effect tube or power tube.
Preferably, power supply includes 3.3v power supplys and 5v power supplys, and it is defeated that 3.3v power supplys by the 9th resistance are connected to the second rotating speed
Incoming interface, 3.3v power supplys are also connected to the first rotating speed input interface by the tenth resistance, and 3.3v power supplys also pass through eleventh resistor
It is connected to the grid of field-effect tube；The source electrode of field-effect tube is grounded, and the drain electrode of field-effect tube is connected respectively to the of the first fan
The third line end of three line ends and the second fan；
5v power supplys are connected to the positive input terminal of the first operational amplifier by 3rd resistor, 5v power supplys pass sequentially through first resistor and
4th resistance is connected to the negative input end of the first operational amplifier, and the negative input end of the first operational amplifier also passes through the 5th resistance
It is connect with the output end of the first operational amplifier；
5v power supplys are connected to the positive input terminal of second operational amplifier by the 6th resistance, 5v power supplys pass sequentially through second resistance and
7th resistance is connected to the negative input end of second operational amplifier, and the negative input end of second operational amplifier also passes through the 8th resistance
It is connect with the output end of second operational amplifier.
Another preferably power supply includes 3.3v power supplys and 5v power supplys, and 3.3v power supplys are connected to second turn by the 9th resistance
Fast input interface, 3.3v power supplys are also connected to the first rotating speed input interface by the tenth resistance, and 3.3v power supplys also pass through the 11st
Resistance is connected to the base stage of power tube；
5v power supplys are connected to the positive input terminal of the first operational amplifier by 3rd resistor, 5v power supplys pass sequentially through first resistor and
4th resistance is connected to the negative input end of the first operational amplifier, and the negative input end of the first operational amplifier also passes through the 5th resistance
It is connect with the output end of the first operational amplifier；
5v power supplys are connected to the positive input terminal of second operational amplifier by the 6th resistance, 5v power supplys pass sequentially through second resistance and
7th resistance is connected to the negative input end of second operational amplifier, and the negative input end of second operational amplifier also passes through the 8th resistance
It is connect with the output end of second operational amplifier, the source electrode ground connection of power tube, the collector of power tube is connected respectively to the first wind
The third line end of fan and the third line end of the second fan.
Preferably, BMC module includes signal input unit, storage unit, control unit and judging unit, and the first operation is put
The big output end of device and the output end of second operational amplifier are connect with signal input unit respectively, signal input part member and judgement
Unit connects, and judging unit is connect with storage unit and control unit respectively.
Preferably, signal input unit, for collecting through the amplified electric current of operational amplifier；
Storage unit, the current threshold of the fan for storing preset corresponding rotating speed；
Judging unit, the current threshold for inputting a signal into current information and the corresponding rotating speed of storage unit that unit receives
Value carries out judgement comparison, outputs signals to control unit；
Control unit, for carrying out fan control according to the output result of the judging unit received or outputting signals to alarm
Unit carries out fan abnormal alarm.
Preferably, fan governor is the fan governor of model ADT7460；
Field-effect tube is the metal-oxide-semiconductor of model NDT30551.
Power tube is the triode of model MMBT222L.
The present invention is that can have its corresponding electric current in relative rotation speed based on fan, passes through the input concatenation in fan
One micro resistance, detects ohmically pressure drop, can be converted into corresponding electric current, for the detecting of electric current, can learn
Whether the electric current of fan has abnormal big or small, the control unit progress such as beyond given threshold BMC module under corresponding rotating speed
Control alarm, inform maintenance repairer do it is corresponding inspect or replace, can reach advance preventing fan disability generation.
When starting fan, there will be electric current through first resistor/second resistance, pressure is produced in first resistor/second resistance
Drop is sent to BMC module through operational amplifier amplification and is distinguished, is converted into corresponding electric current, not can be only used for the dimension after volume production
Shield, can be also used in plant produced is the detection for fan supplied materials, can will have abnormal fan to pick out in advance, reach and reduce out
The generation of goods rear fan problem.
The beneficial effects of the present invention are, the present invention is that can have its corresponding electric current in relative rotation speed based on fan,
A micro resistance is concatenated by the input in fan, ohmically pressure drop is detected, corresponding electric current can be converted into, for electricity
It is abnormal big or small can to learn whether the electric current of the fan under corresponding rotating speed has, such as exceeds given threshold BMC for the detecting of stream
The control unit of module carries out control alarm, inform maintenance repairer do it is corresponding inspect or replace, can reach advance preventing
The generation of fan disability.The maintenance after volume production is not can be only used for, can be also used in plant produced is the detection for fan supplied materials, can
There to be abnormal fan to pick out in advance, reaches the generation for reducing shipment rear fan problem.
In addition, design principle of the present invention is reliable, and it is simple in structure, there is very extensive application prospect.
It can be seen that compared with prior art, the present invention with substantive distinguishing features outstanding and significantly improving, implementation
Advantageous effect be also obvious.
Description of the drawings
Fig. 1 is a kind of circuit connection diagram for fan electrical current detecting system that the embodiment of the present invention 1 provides.
Specific implementation mode
The present invention will be described in detail below in conjunction with the accompanying drawings and by specific embodiment, and following embodiment is to the present invention
Explanation, and the invention is not limited in following implementation.
Embodiment 1：
As shown in Figure 1, a kind of fan electrical current detecting system provided by the invention, including power supply, fan governor U3 and fan, electricity
Source is connect with fan governor U3 and fan respectively；The fan is equipped with the first line end, the second line end and third line end, fan control
Device processed is equipped with rotating speed input interface, and rotating speed input interface is connect with the first line end of fan；The second line end of fan passes through sampling resistor
It is connected with operational amplifier, the output end of operational amplifier is connected with BMC module 3；
Fan governor U3 is additionally provided with drive control interface PWM, the drive control interface PWM and is connected with fan-driving module,
The third line end of the fan-driving module and fan connects.
Fan includes the first fan 4 and the second fan 5, and operational amplifier includes the first operational amplifier U1 and the second operation
Amplifier U2, sampling resistor include first resistor R1 and second resistance R2, and rotating speed input interface includes the first rotating speed input interface
TACH1 and the second rotating speed input interface TACH2；
First rotating speed input interface TACH1 is connect with 4 first line end of the first fan, and the second line end of the first fan 4 passes through first
Resistance R1 is connect with the input terminal of the first operational amplifier U1, and the output end of the first operational amplifier U1 is connected to BMC module 3,
First fan, 4 third line end is connected to fan-driving module, and 4 third line end of the first fan is also associated with the anode of diode D1,
The cathode of diode D1 is connect with the second line end of the first fan 4；
Fan-driving module is also connect with the third line end of the second fan 5, and the first line end of the second fan 5 and the second rotating speed input
Second line end of interface TACH2 connections, the second fan 5 is connected to the input of second operational amplifier U2 by second resistance R2
End, the output end of second operational amplifier U2 are connected to BMC module 3.
The fan-driving module is field-effect tube Q1.
Power supply includes 3.3v power supplys 1 and 5v power supplys 2, and 3.3v power supplys 1 are connected to the second rotating speed by the 9th resistance R9 and input
It is also logical that interface TACH2,3.3v power supply 1 is also connected to the first rotating speed input interface TACH1,3.3v power supply 1 by the tenth resistance R10
Cross the grid that eleventh resistor R11 is connected to field-effect tube Q1；The source electrode of field-effect tube Q1 is grounded, the drain electrode point of field-effect tube Q1
It is not connected to the third line end of the third line end and the second fan 5 of the first fan 4；
5v power supplys 2 are connected to the positive input terminal of the first operational amplifier U1 by 3rd resistor R3, and 5v power supplys 2 pass sequentially through first
Resistance R1 and the 4th resistance R4 is connected to the negative input end of the first operational amplifier U1, the negative input end of the first operational amplifier U1
Also it is connect with the output end of the first operational amplifier U1 by the 5th resistance R5；
5v power supplys 2 are connected to the positive input terminal of second operational amplifier U2 by the 6th resistance R6, and 5v power supplys 2 pass sequentially through second
Resistance R2 and the 7th resistance R7 is connected to the negative input end of second operational amplifier U2, the negative input end of second operational amplifier U2
Also it is connect with the output end of second operational amplifier U2 by the 8th resistance R8.
BMC module 3 includes signal input unit, storage unit, control unit and judging unit, the first operational amplifier
Output end and the output end of second operational amplifier are connect with signal input unit respectively, and signal input part member connects with judging unit
It connects, judging unit is connect with storage unit and control unit respectively.
Signal input unit, for collecting through the amplified electric current of operational amplifier；
Storage unit, the current threshold of the fan for storing preset corresponding rotating speed；
Judging unit, the current threshold for inputting a signal into current information and the corresponding rotating speed of storage unit that unit receives
Value carries out judgement comparison, outputs signals to control unit；
Control unit, for carrying out fan control according to the output result of the judging unit received or outputting signals to alarm
Unit carries out fan abnormal alarm.
Fan governor U3 is the fan governor of model ADT7460；Field-effect tube Q1 is model NDT30551's
Metal-oxide-semiconductor.
Embodiment 2：
A kind of fan electrical current detecting system, including power supply, fan governor U3 and fan, power supply respectively with fan governor U3 and
Fan connects；The fan is equipped with the first line end, the second line end and third line end, and fan governor is equipped with rotating speed input interface,
Rotating speed input interface is connect with the first line end of fan；The second line end of fan is connected with operational amplifier, operation by sampling resistor
The output end of amplifier is connected with BMC module 3；
Fan governor U3 is additionally provided with drive control interface PWM, the drive control interface PWM and is connected with fan-driving module,
The third line end of the fan-driving module and fan connects.
Fan includes the first fan 4 and the second fan 5, and operational amplifier includes the first operational amplifier U1 and the second operation
Amplifier U2, sampling resistor include first resistor R1 and second resistance R2, and rotating speed input interface includes the first rotating speed input interface
TACH1 and the second rotating speed input interface TACH2；
First rotating speed input interface TACH1 is connect with 4 first line end of the first fan, and the second line end of the first fan 4 passes through first
Resistance R1 is connect with the input terminal of the first operational amplifier U1, and the output end of the first operational amplifier U1 is connected to BMC module 3,
First fan, 4 third line end is connected to fan-driving module, and 4 third line end of the first fan is also associated with the anode of diode D1,
The cathode of diode D1 is connect with the second line end of the first fan 4；
Fan-driving module is also connect with the third line end of the second fan 5, and the first line end of the second fan 5 and the second rotating speed input
Second line end of interface TACH2 connections, the second fan 5 is connected to the input of second operational amplifier U2 by second resistance R2
End, the output end of second operational amplifier U2 are connected to BMC module 3.
The fan-driving module is power tube.
Power supply includes 3.3v power supplys 1 and 5v power supplys 2, and 3.3v power supplys 1 are connected to the second rotating speed by the 9th resistance R9 and input
It is also logical that interface TACH2,3.3v power supply 1 is also connected to the first rotating speed input interface TACH1,3.3v power supply 1 by the tenth resistance R10
Cross the base stage that eleventh resistor R11 is connected to power tube；The emitter of power tube is grounded, and the collector of power tube is connected respectively to
The third line end of the third line end of first fan 4 and the second fan 5；
5v power supplys 2 are connected to the positive input terminal of the first operational amplifier U1 by 3rd resistor R3, and 5v power supplys 2 pass sequentially through first
Resistance R1 and the 4th resistance R4 is connected to the negative input end of the first operational amplifier U1, the negative input end of the first operational amplifier U1
Also it is connect with the output end of the first operational amplifier U1 by the 5th resistance R5；
5v power supplys 2 are connected to the positive input terminal of second operational amplifier U2 by the 6th resistance R6, and 5v power supplys 2 pass sequentially through second
Resistance R2 and the 7th resistance R7 is connected to the negative input end of second operational amplifier U2, the negative input end of second operational amplifier U2
Also it is connect with the output end of second operational amplifier U2 by the 8th resistance R8.
BMC module 3 includes signal input unit, storage unit, control unit and judging unit, the first operational amplifier
Output end and the output end of second operational amplifier are connect with signal input unit respectively, and signal input part member connects with judging unit
It connects, judging unit is connect with storage unit and control unit respectively.
Signal input unit, for collecting through the amplified electric current of operational amplifier；
Storage unit, the current threshold of the fan for storing preset corresponding rotating speed；
Judging unit, the current threshold for inputting a signal into current information and the corresponding rotating speed of storage unit that unit receives
Value carries out judgement comparison, outputs signals to control unit；
Control unit, for carrying out fan control according to the output result of the judging unit received or outputting signals to alarm
Unit carries out fan abnormal alarm.
Fan governor U3 is the fan governor of model ADT7460；
Power tube is the triode of model MMBT222L.
The present invention is that can have its corresponding electric current in relative rotation speed based on fan, passes through the input concatenation in fan
One micro resistance, detects ohmically pressure drop, can be converted into corresponding electric current, for the detecting of electric current, can learn
Whether the electric current of fan has abnormal big or small, the control unit progress such as beyond given threshold BMC module 3 under corresponding rotating speed
Control alarm, inform maintenance repairer do it is corresponding inspect or replace, can reach advance preventing fan disability generation.
When starting fan, will have electric current through R1/R2, pressure drop is produced on R1/R2, through operational amplifier amplification send to
BMC module 3 distinguishes, is converted into corresponding electric current, not can be only used for the maintenance after volume production, and can be also used in plant produced is needle
Detection to fan supplied materials can will have abnormal fan to pick out in advance, reach the generation for reducing shipment rear fan problem.
Disclosed above is only the preferred embodiment of the present invention, but the present invention is not limited to this, any this field
What technical staff can think does not have a creative variation, and without departing from the principles of the present invention made by several improvement and
Retouching, should all be within the scope of the present invention.
Claims (8)
1. a kind of fan electrical current detecting system, which is characterized in that including power supply, fan governor and fan, power supply respectively with wind
Fan controller is connected with fan；The fan is equipped with the first line end, the second line end and third line end, and fan governor is equipped with rotating speed
Input interface, rotating speed input interface are connect with the first line end of fan；The second line end of fan is connected with operation by sampling resistor and puts
The output end of big device, operational amplifier is connected with BMC module；
Fan governor is additionally provided with drive control interface, and the drive control interface is connected with fan-driving module, the fan
The third line end of drive module and fan connects.
2. a kind of fan electrical current detecting system according to claim 1, which is characterized in that fan includes the first fan and the
Two fans, operational amplifier include the first operational amplifier and second operational amplifier, and sampling resistor includes first resistor and the
Two resistance, rotating speed input interface include the first rotating speed input interface and the second rotating speed input interface；
First rotating speed input interface is connect with first the first line end of fan, and the second line end of the first fan passes through first resistor and the
The input terminal of one operational amplifier connects, and the output end of the first operational amplifier is connected to BMC module, the first fan third line end
It is connected to fan-driving module, the first fan third line end is also associated with the anode of diode, the cathode of diode and the first wind
The second line end connection of fan；
Fan-driving module is also connect with the third line end of the second fan, and the first line end and the input of the second rotating speed of the second fan connect
Mouth connection, the second line end of the second fan are connected to the input terminal of second operational amplifier by second resistance, and the second operation is put
The output end of big device is connected to BMC module.
3. a kind of fan electrical current detecting system according to claim 2, which is characterized in that the fan-driving module includes
Field-effect tube or power tube.
4. a kind of fan electrical current detecting system according to claim 3, which is characterized in that power supply includes 3.3v power supplys and 5v
Power supply, 3.3v power supplys are connected to the second rotating speed input interface by the 9th resistance, and 3.3v power supplys are also connected to by the tenth resistance
First rotating speed input interface, 3.3v power supplys are also connected to the grid of field-effect tube by eleventh resistor；The source electrode of field-effect tube
Ground connection, the drain electrode of field-effect tube are connected respectively to the third line end of the first fan and the third line end of the second fan；
5v power supplys are connected to the positive input terminal of the first operational amplifier by 3rd resistor, 5v power supplys pass sequentially through first resistor and
4th resistance is connected to the negative input end of the first operational amplifier, and the negative input end of the first operational amplifier also passes through the 5th resistance
It is connect with the output end of the first operational amplifier；
5v power supplys are connected to the positive input terminal of second operational amplifier by the 6th resistance, 5v power supplys pass sequentially through second resistance and
7th resistance is connected to the negative input end of second operational amplifier, and the negative input end of second operational amplifier also passes through the 8th resistance
It is connect with the output end of second operational amplifier.
5. a kind of fan electrical current detecting system according to claim 3, which is characterized in that power supply includes 3.3v power supplys and 5v
Power supply, 3.3v power supplys are connected to the second rotating speed input interface by the 9th resistance, and 3.3v power supplys are also connected to by the tenth resistance
First rotating speed input interface, 3.3v power supplys are also connected to the base stage of power tube by eleventh resistor；
5v power supplys are connected to the positive input terminal of the first operational amplifier by 3rd resistor, 5v power supplys pass sequentially through first resistor and
4th resistance is connected to the negative input end of the first operational amplifier, and the negative input end of the first operational amplifier also passes through the 5th resistance
It is connect with the output end of the first operational amplifier；
5v power supplys are connected to the positive input terminal of second operational amplifier by the 6th resistance, 5v power supplys pass sequentially through second resistance and
7th resistance is connected to the negative input end of second operational amplifier, and the negative input end of second operational amplifier also passes through the 8th resistance
It is connect with the output end of second operational amplifier, the source electrode ground connection of power tube, the collector of power tube is connected respectively to the first wind
The third line end of fan and the third line end of the second fan.
6. a kind of fan electrical current detecting system according to claim 4 or 5, which is characterized in that BMC module includes that signal is defeated
Enter unit, storage unit, control unit and judging unit, the output end of the first operational amplifier and second operational amplifier it is defeated
Outlet is connect with signal input unit respectively, and signal input part member is connect with judging unit, judging unit respectively with storage unit
It is connected with control unit.
7. a kind of fan electrical current detecting system according to claim 6, which is characterized in that signal input unit, for connecing
It receives collected through the amplified electric current of operational amplifier；
Storage unit, the current threshold of the fan for storing preset corresponding rotating speed；
Judging unit, the current threshold for inputting a signal into current information and the corresponding rotating speed of storage unit that unit receives
Value carries out judgement comparison, outputs signals to control unit；
Control unit, for carrying out fan control according to the output result of the judging unit received or outputting signals to alarm
Unit carries out fan abnormal alarm.
8. a kind of fan electrical current detecting system according to claim 7, which is characterized in that fan governor is model
The fan governor of ADT7460；
Field-effect tube is the metal-oxide-semiconductor of model NDT30551；
Power tube is the triode of model MMBT222L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810316906.2A CN108449005A (en) | 2018-04-10 | 2018-04-10 | A kind of fan electrical current detecting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810316906.2A CN108449005A (en) | 2018-04-10 | 2018-04-10 | A kind of fan electrical current detecting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108449005A true CN108449005A (en) | 2018-08-24 |
Family
ID=63199073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810316906.2A Pending CN108449005A (en) | 2018-04-10 | 2018-04-10 | A kind of fan electrical current detecting system |
Country Status (1)
| Country | Link |
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| CN (1) | CN108449005A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101211304A (en) * | 2006-12-30 | 2008-07-02 | 联想(北京)有限公司 | Fan working condition detection method and detection device |
| CN105183115A (en) * | 2015-08-17 | 2015-12-23 | 上海斐讯数据通信技术有限公司 | Electronic device heat dissipation monitoring system and electronic device |
| CN107453654A (en) * | 2016-06-01 | 2017-12-08 | 德昌电机(深圳)有限公司 | Fan and its motor driver |
-
2018
- 2018-04-10 CN CN201810316906.2A patent/CN108449005A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101211304A (en) * | 2006-12-30 | 2008-07-02 | 联想(北京)有限公司 | Fan working condition detection method and detection device |
| CN105183115A (en) * | 2015-08-17 | 2015-12-23 | 上海斐讯数据通信技术有限公司 | Electronic device heat dissipation monitoring system and electronic device |
| CN107453654A (en) * | 2016-06-01 | 2017-12-08 | 德昌电机(深圳)有限公司 | Fan and its motor driver |
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Application publication date: 20180824 |