CN2454988Y - Reference voltage rotational-speed-controlling fan motor - Google Patents
Reference voltage rotational-speed-controlling fan motor Download PDFInfo
- Publication number
- CN2454988Y CN2454988Y CN 00257482 CN00257482U CN2454988Y CN 2454988 Y CN2454988 Y CN 2454988Y CN 00257482 CN00257482 CN 00257482 CN 00257482 U CN00257482 U CN 00257482U CN 2454988 Y CN2454988 Y CN 2454988Y
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- CN
- China
- Prior art keywords
- reference voltage
- fan
- differential amplifier
- circuit
- rotating speed
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- 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.)
- Expired - Lifetime
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Abstract
The utility model relates to a reference voltage rotational speed controlling fan motor. The utility model comprises a reference voltage circuit which outputs a reference voltage Vref, and a differential amplifier which is arranged between a fan and the reference voltage circuit, the negative end of the differential amplifier is connected with reference voltage, the positive end of the differential amplifier is connected with the divided voltage of a power supply Vcc, and the differential amplifier outputs a driving voltage Vf to the fan according to the voltage difference changes of the negative end and the positive end. The reference voltage circuit determines to output proper reference voltage Vref value, when the reference voltage Vref which is input to the negative end of the differential amplifier lowers, the driving voltage Vf output by the differential amplifier is increased to make the rotational speed of the fan raised, and when the reference voltage Vref which is input to the negative end of the differential amplifier rises, the driving voltage Vf output by the differential amplifier is decreased to make the rotational speed of the fan lowered.
Description
The fan electromotor of the relevant a kind of reference voltage control rotating speed of the utility model, particularly reference voltage is added and subtracted mutually with power Vcc about a kind of differential amplifier that utilizes, make the driving voltage of its output form linear mild waveform, make rotation speed of the fan gently speedup or deceleration to change rotation speed of the fan.
The traditional heat-dissipating fan is in No. 327486 " the wide modulation control circuit of brush DC fan ripple " novel patent case of Taiwan patent announcement of bulletin on February 21st, 1998, as shown in Figures 1 and 2.Fig. 1 discloses control circuit figure; Fig. 2 discloses the output waveform figure of control switch.Please refer to shown in Figure 1, the rectification circuit 10 of No. 327486 patent announcement is to constitute the high-pass filtering network with electric capacity 11 and a resistance 14, and with two diodes 12,13 and filter capacitor 15 constitute rectifying and wave-filterings, and the square-wave signal that makes reception can be exchanged into d. c. voltage signal, and the adding of this high-pass filtering network, more can make the output voltage can be with the proportional relationship change of frequency, so, can measure the rotating speed of fan 50 by the output voltage of rectification circuit 10, be connected in series with one fen piezoelectricity group and form and the reference voltage of this supply voltage comparator 20 is thermistors 40 by a negative temperature coefficient, obtain a reference voltage level by its dividing potential drop end points place, and the design of this thermistor 40, can make it have effect temperature compensation concurrently, also promptly when ambient temperature raises, then make the impedance of thermistor 40 descend relatively, the also promptly feasible reference voltage rising (heightening speed reference) that is fed through voltage comparator 20, so, can make fan 50 maintain the higher rotation speed state, otherwise, if ambient temperature is reduced to standard value when following, the also corresponding speed reference that makes descends, and promptly keeps fan than low speed state.These control switch 30 output waveforms form the rotating-speed control circuit of the wide modulation of a kind of ripple as shown in Figure 2.Yet, No. 327486 output waveform is the intermittent rectangular wave that opens and closes, and anxious speedup or anxious the deceleration take place in the keying that fan 50 rotates along with rectangular wave or control switch 30, and this moment, rotation speed of the fan caused rocking because of taking place to change rapidly, and then make fan minimizing in useful life.
The utility model main purpose provides a kind of fan electromotor of reference voltage control rotating speed, it utilizes differential amplifier that the reference voltage of reference voltage circuit output is added and subtracted mutually with power Vcc, make it export a fans drive voltage, this driving voltage forms the mild waveform of a linear change, make rotation speed of the fan speedup or deceleration gently, avoiding taking place anxious speedup of rotation speed of the fan or anxious the deceleration, to prolong fan useful life.
The utility model is achieved in that a kind of fan electromotor of reference voltage control rotating speed, and it is characterized in that: this fan electromotor comprises a reference voltage circuit, and it exports a reference voltage Vref; And a differential amplifier, it is arranged between fan and the reference voltage circuit, and its negative terminal connects the dividing potential drop that reference voltage, anode connect power Vcc, and it changes according to positive and negative terminal voltage difference and exports a driving voltage Vf to fan at output; Wherein when the reference voltage Vref of this reference voltage circuit output raises, the driving voltage Vf that this differential amplifier exports fan to reduces gently, and then the drive rotation speed of the fan reduces gently, if when the reference voltage Vref of reference voltage circuit output reduces, the driving voltage Vf that this differential amplifier exports fan to rises gently, and then the drive rotation speed of the fan raises gently.
This reference voltage circuit is a circuit that is made of thermistor.
This reference voltage circuit is a piezoelectric circuit.
This reference voltage circuit is a microprocessor system.
This reference voltage circuit can utilize the actual speed signal fine setting reference voltage Vref value of fan rotating speed signals FG.
The utility model is a kind ofly to control the fan electromotor of rotation speed of the fan with an adjustable reference voltage, can make mild speedup of rotation speed of the fan or deceleration, and it avoids taking place anxious speedup of rotation speed of the fan or anxious the deceleration, to prolong fan useful life.
Describe the purpose of this utility model, structure, feature and advantage in detail below in conjunction with preferable actual example and accompanying drawing:
Fig. 1 is the circuit diagram of No. the 327486th, Taiwan patent announcement.
Fig. 2 is the output waveform figure of the control switch of No. the 327486th, Taiwan patent announcement.
Fig. 3 is the circuit diagram of the utility model preferred embodiment reference voltage control.
Fig. 4 is the oscillogram of the utility model preferred embodiment reference voltage Vref, fan rotating speed signals FG and driving voltage Vf.
The fan electromotor of the utility model reference voltage control rotating speed mainly comprises a reference voltage circuit and a differential amplifier.This reference voltage circuit can be thermosensitive resistor and circuit (negative temperaturecoefficient cirouit) or piezoelectric circuit (piezoelectric circuit) or microprocessor system (microprocessor system), and its key property is according to ambient temperature, system requirements decision output fine setting reference voltage level size.In addition, this reference voltage circuit also can utilize the actual speed decision of fan rotating speed signals FG whether to adjust the value of reference voltage Vref.When reference voltage Vref inputs to the voltage reduction of differential amplifier negative terminal, the driving voltage Vf of differential amplifier output is increased, rotation speed of the fan is raise; When reference voltage Vref inputs to the voltage rising of differential amplifier negative terminal, the outputting drive voltage Vf of differential amplifier is reduced, so rotation speed of the fan reduce.
Please refer to shown in Figure 3, the fan electromotor of the utility model preferred embodiment reference voltage control rotating speed, it mainly comprises a reference voltage circuit 60 and a differential amplifier 70.This differential amplifier 70 is arranged between fan 80 and the power Vcc, the negative terminal of this differential amplifier 70 is connected in one by thermistor or press element or reference voltage circuit 60 that microprocessor system constituted, the anode of differential amplifier 70 then is connected in power Vcc, this differential amplifier 70 is after doing positive and negative end input voltage mutually plus-minus, can export a driving voltage Vf, this driving voltage Vf then is connected in fan 80.In addition, this reference voltage circuit 60 also can utilize reception to be detected the actual speed signal FG of output by fan 80, reference voltage Vref with fine setting output, this reference voltage Vref inputs to the negative terminal of differential amplifier 70 through the filter rectification of C1 and R1, and add and subtract mutually with dividing potential drop in the power Vcc of differential amplifier 70 anodes, and export the driving voltage Vf of drive fan running, and this differential amplifier 70 is to change outputting drive voltage Vf according to the adjustment of reference voltage Vref.The voltage that inputs to differential amplifier 70 negative terminals when reference voltage Vref reduces the driving voltage Vf increase that then makes differential amplifier 70 outputs, therefore rotation speed of the fan raises, the voltage that inputs to differential amplifier 70 negative terminals when reference voltage Vref raises, then the outputting drive voltage Vf of differential amplifier 70 reduces, and forms rotation speed of the fan and reduces.
Please refer to shown in Figure 4, when it disclose to utilize adjusts reference voltage Vref value, the oscillogram that the tach signal FG of outputting drive voltage Vf and fan 80 is changed relatively.When reference voltage Vref=V1 (inferior high), make differential amplifier 70 export a lower driving voltage Vf, make the tach signal frequency f 1 of fan 80 be time high state, when reference voltage increases to Vref=V2 by Vref=V1, make the differential amplifier 70 outputs one mild driving voltage Vf that reduces, make fan 80 tach signal frequencies be gradually reduced to f2 by f1 relatively, when reference voltage when Vref=V2 reduces to Vref=V3, the differential amplifier 70 outputs one mild driving voltage Vf that raises makes fan 80 tach signal frequencies increase to f3 gradually by f2.Therefore, when reference voltage circuit 60 output fine setting reference voltage Vref values, the driving voltage Vf of differential amplification longevity 70 outputs is changed, and make this driving voltage Vf be the waveform of linear smoothing, thereby make fan 80 mild speedup or decelerations.
Referring again to Fig. 2 and shown in Figure 4, patent announcement No. 327486 outputting drive voltage waveform in Taiwan is the intermittent rectangular wave that opens and closes, and anxious speedup or anxious the deceleration take place in the keying that fan rotates along with rectangular wave or control switch, this moment, rotation speed of the fan caused rocking because of taking place to change rapidly, and then made fan minimizing in useful life.Opposite, the utility model utilizes relatively adjusts reference voltage Vref input control power source voltage Vcc output fans drive voltage Vf, this driving voltage Vf forms a mild waveform, make rotation speed of the fan speedup or deceleration gently, can avoid taking place anxious speedup of rotation speed of the fan or anxious the deceleration, to prolong fan useful life.
Claims (5)
1, a kind of fan electromotor of reference voltage control rotating speed, it is characterized in that: this fan electromotor comprises a reference voltage circuit, and it exports a reference voltage Vref; And a differential amplifier, it is arranged between fan and the reference voltage circuit, and its negative terminal connects the dividing potential drop that reference voltage, anode connect power Vcc, and it changes according to positive and negative terminal voltage difference and exports a driving voltage Vf to fan at output.
2, the fan electromotor of reference voltage as claimed in claim 1 control rotating speed is characterized in that: this reference voltage circuit is a circuit that is made of thermistor.
3, the fan electromotor of reference voltage control rotating speed as claimed in claim 1, it is characterized in that: this reference voltage circuit is a piezoelectric circuit.
4, the fan electromotor of reference voltage control rotating speed as claimed in claim 1, it is characterized in that: this reference voltage circuit is a microprocessor system.
5, the fan electromotor of reference voltage control rotating speed as claimed in claim 1 is characterized in that: this reference voltage circuit can utilize the actual speed signal fine setting reference voltage Vref value of fan rotating speed signals FG.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00257482 CN2454988Y (en) | 2000-11-06 | 2000-11-06 | Reference voltage rotational-speed-controlling fan motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00257482 CN2454988Y (en) | 2000-11-06 | 2000-11-06 | Reference voltage rotational-speed-controlling fan motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2454988Y true CN2454988Y (en) | 2001-10-17 |
Family
ID=33613988
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00257482 Expired - Lifetime CN2454988Y (en) | 2000-11-06 | 2000-11-06 | Reference voltage rotational-speed-controlling fan motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2454988Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102298087A (en) * | 2011-09-05 | 2011-12-28 | 青岛海信日立空调系统有限公司 | Method for measuring voltage of power grid according to revolving speed of direct-current motor of air pipe type air-conditioning indoor unit |
| CN103580557A (en) * | 2012-08-06 | 2014-02-12 | 台达电子工业股份有限公司 | Capturing system and method for capturing reaction electromotive force |
| CN110323976A (en) * | 2019-08-05 | 2019-10-11 | 中山市特新电子科技有限公司 | A kind of motor governing system controlled by power source change |
-
2000
- 2000-11-06 CN CN 00257482 patent/CN2454988Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102298087A (en) * | 2011-09-05 | 2011-12-28 | 青岛海信日立空调系统有限公司 | Method for measuring voltage of power grid according to revolving speed of direct-current motor of air pipe type air-conditioning indoor unit |
| CN102298087B (en) * | 2011-09-05 | 2013-04-03 | 青岛海信日立空调系统有限公司 | Method for measuring voltage of power grid according to revolving speed of direct-current motor of air pipe type air-conditioning indoor unit |
| CN103580557A (en) * | 2012-08-06 | 2014-02-12 | 台达电子工业股份有限公司 | Capturing system and method for capturing reaction electromotive force |
| CN110323976A (en) * | 2019-08-05 | 2019-10-11 | 中山市特新电子科技有限公司 | A kind of motor governing system controlled by power source change |
| CN110323976B (en) * | 2019-08-05 | 2024-04-26 | 中山市特新电子科技有限公司 | Motor speed regulation system controlled by power supply change |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Kunshan Guangxing Electronics Co., Ltd. Assignor: Jianzhun Electric Motor Industry Co., Ltd. Contract fulfillment period: In November 6, 2010, the patent expired Contract record no.: 031000030110 Denomination of utility model: Fan motor with reference voltage control speed Granted publication date: 20011017 License type: General permission Record date: 2003.5.29 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: COMMON LICENCE; TIME LIMIT OF IMPLEMENTING CONTACT: 2010.11.6, EXPIRATION OF PATENT RIGHT Name of requester: KUNSHAN GUANGXING ELECTRONICS CO., LTD. Effective date: 20030529 |
|
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Kunshan Guangxing Electronics Co., Ltd. Assignor: Jianzhun Electric Motor Industry Co., Ltd. Contract fulfillment period: November 6, 2010 Contract record no.: 031000030110 Denomination of utility model: Fan motor with reference voltage control speed Granted publication date: 20011017 License type: General permission Record date: 20030529 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: COMMON LICENCE; TIME LIMIT OF IMPLEMENTING CONTACT: 2010.11.6 Name of requester: KUNSHAN GUANGXING ELECTRONICS CO., LTD. Effective date: 20030529 |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20101106 Granted publication date: 20011017 |