CN203835769U - Intelligent direct-current fan control system of audio power amplifier - Google Patents
Intelligent direct-current fan control system of audio power amplifier Download PDFInfo
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- CN203835769U CN203835769U CN201420161840.1U CN201420161840U CN203835769U CN 203835769 U CN203835769 U CN 203835769U CN 201420161840 U CN201420161840 U CN 201420161840U CN 203835769 U CN203835769 U CN 203835769U
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- fan control
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- 230000003287 optical effect Effects 0.000 claims description 21
- 230000005669 field effect Effects 0.000 claims description 9
- 230000003321 amplification Effects 0.000 claims description 7
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 7
- 230000008859 change Effects 0.000 abstract description 15
- 230000005855 radiation Effects 0.000 abstract description 3
- 239000003990 capacitor Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000000470 constituent Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 208000001953 Hypotension Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000036543 hypotension Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
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Abstract
The utility model discloses an intelligent direct-current fan control system of an audio power amplifier. The intelligent direct-current fan control system comprises a fan, a data acquisition circuit, an amplifying buffer circuit, a temperature sensor circuit, a circuit with an A/D (Analog-Digital) single-chip microcomputer and a fan control circuit, wherein the input end of the data acquisition circuit is connected to the output end of the audio power amplifier; the output end of the data acquisition circuit is connected to the amplifying buffer circuit; the amplifying buffer circuit is connected to the circuit with the A/D single chip microcomputer; the temperature sensor circuit is connected to the circuit with the A/D single chip microcomputer; the circuit with the A/D single chip microcomputer is connected to the fan control circuit; the fan control circuit is connected to the fan. The system adopts the manner that PWM (Pulse-Width Modulation) changes the duty ratio to control the rotating speed. The system is convenient to sample, and the fan is continuously variable along with the temperature; the speed increment of the fan can also change on the basis of a preset scheme according to the temperature change rate of different temperature ranges; therefore, the rotating speed of the fan can be intelligently increased in a forced manner to quicken the heat radiation in the case of the high power output and the high temperature quick change, and accordingly, the reliable operation of the machine is ensured.
Description
Technical field
The utility model relates to a kind of blower fan control system, is specifically related to audio power amplifier intelligent DC blower fan control system.
Background technique
It is in blower fan power supply, to go here and there a resistance to reduce rotation speed of fan that audio power amplifier conventional fan is controlled straightforward procedure, on resistance and one often open thermal switch, and thermal switch action when excess Temperature, resistive short blower fan is at full speed.Complicated any be in blower fan power supply circuits, to add a single tube reduction voltage circuit, by a thermistor controlled hypotension circuit linear change, reach stepless change control rotation speed of fan.In these modes, the first is too simple, can only be for less demanding occasion, the second also can only be followed the tracks of temperature slowly increases rotation speed of fan, in load, continuing to increase the weight of when very fast with temperature variation can not effecting reaction, and it is large that single tube is operated in linear magnifying state consumed power, during low speed, to force down moment of torsion little for blower fan power supply.
Model utility content
The utility model has overcome the deficiencies in the prior art, and a kind of simple, reliable, intelligent DC blower fan control system of being applicable to the air-cooled audio power amplifier of direct current supply is provided.
For solving above-mentioned technical problem, the utility model by the following technical solutions:
An audio power amplifier intelligent DC blower fan control system, comprises blower fan; Described audio power amplifier intelligent DC blower fan control system also comprises data acquisition circuit, amplifies buffer circuit, temperature sensor circuit, band A/D single chip circuit and draught fan control circuit; Described data acquisition circuit input end connects audio power amplifier output terminal, and described data acquisition circuit output terminal connects amplification buffer circuit; Described amplification buffer circuit connecting band A/D single chip circuit; Described temperature sensor circuit connecting band A/D single chip circuit; Described band A/D single chip circuit connecting fan control circuit; Described draught fan control circuit connecting fan.
Further technological scheme is that temperature sensor circuit comprises: radiator temperature sensor circuit and transformer temperature sensor circuit; Described radiator temperature sensor circuit is connected with described band A/D single chip circuit; Described transformer temperature sensor circuit is connected with described band A/D single chip circuit.
Further technological scheme is that data acquisition circuit comprises loudspeaker and accurate sample resistance; Described loudspeaker are connected with described accurate sample resistance; Described loudspeaker connect audio power amplifier output terminal.
Further technological scheme is to amplify buffer circuit to comprise the first electric capacity, the second resistance, the 3rd resistance, the second electric capacity, the 4th resistance, operational amplifier, the 5th resistance, the 6th resistance, the 7th resistance, the first diode, the second diode, described the first capacitance cathode and precision resistance and loudspeaker are connected, the first electric capacity negative pole and the second resistance, the 3rd resistance is connected, be connected to the second resistance the other end and reference, the 3rd resistance the other end and operational amplifier negative terminal, the 4th resistance, the second electric capacity is connected, be connected to operational amplifier anode and reference, the 4th resistance the other end and the second electric capacity the other end, operational amplifier output terminal, the 5th resistance, the 6th resistance is connected, be connected to the 5th resistance the other end and reference, the 6th resistance and the first diode cathode are connected, the first diode cathode and the 7th resistance, the second diode cathode, A/D mouth with A/D single-chip microcomputer is connected, the 7th resistance the other end and the second diode cathode respectively with reference to be connected.
Further technological scheme is that radiator temperature sensor circuit comprises the first temperature transducer and the 8th resistance; Described the first temperature transducer GND pin with reference to ground, be connected, the first temperature transducer VCC pin is connected with+5V power supply, the first temperature transducer DA pin is connected with the 8th resistance, band A/D single-chip microcomputer respectively, the 8th resistance the other end and+5V power supply is connected.
Further technological scheme is that transformer temperature sensor circuit comprises the second temperature transducer and the 9th resistance; Described the second temperature transducer GND pin with reference to ground, be connected, the second temperature transducer VCC pin is connected with+5V power supply, the second temperature transducer DA pin is connected with the 9th resistance, band A/D single-chip microcomputer respectively, the 9th resistance the other end and+5V power supply is connected.
Further technological scheme is that draught fan control circuit comprises: the tenth resistance, optical coupler, the 3rd diode, electric three electric capacity, the 4th electric capacity, the 11 resistance, the 22 resistance, the 13 resistance, field effect transistor, the 5th electric capacity, the 4th diode, the 14 resistance, described the tenth resistance is connected with band A/D single-chip processor i/o mouth, the tenth resistance the other end and optical coupler 3 pin are connected, optical coupler 2 pin are connected with+5V power supply, described optical coupler 1, 4 pin are empty, optical coupler 5 pin and blower fan power supply negative terminal FAN-are connected, optical coupler 6 pin respectively with 7 pin, the 11 resistance, the 12 resistance is connected, the 11 resistance the other end and blower fan power supply negative terminal FAN-are connected, the 12 resistance the other end and fet gate are connected, field effect transistor source electrode and blower fan power supply negative terminal FAN-are connected, field effect transistor drain electrode respectively with blower fan negative pole, the 14 resistance, the 5th electric capacity, the 4th diode cathode is connected, blower fan positive pole respectively with the 14 resistance the other end, the 5th electric capacity the other end, the 4th diode cathode, the 13 resistance is connected, the 13 resistance the other end respectively with the 3rd electric capacity, the 4th capacitance cathode, the 3rd diode cathode, optical coupler 8 pin are connected, the three or two extreme pipe positive pole respectively with the 3rd electric capacity the other end, the 4th electric capacity negative pole is connected.
Further technological scheme is that the first temperature transducer is that model is DS1820 temperature transducer.
Further technological scheme is that the second temperature transducer is that model is DS1820 temperature transducer.
Compared with prior art, the beneficial effects of the utility model are: the utility model adopts PWM to change dutycycle mode and controls rotating speed.With temperature stepless speed regulating blower fan; Also according to press presupposed solution at the rate of temperature change of different temperature sections, change fan speed increment; Also according to press presupposed solution at the output current variance ratio of different output current sections, change fan speed increment.Thereby can Intelligent forced when high-power output and high temperature change fast increase rotation speed of fan, accelerate heat radiation, thereby guarantee machine reliable operation.
Accompanying drawing explanation
Fig. 1 is an embodiment's of the utility model schematic block circuit diagram.
Fig. 2 is an embodiment's of the utility model circuit theory diagrams.
Fig. 3 is the oscillogram applying on embodiment's circuit theory diagrams blower fan of the utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further elaborated.
As shown in Figure 1, Fig. 1 shows an embodiment's of the utility model schematic block circuit diagram, and the present embodiment audio power amplifier intelligent DC blower fan control system, comprises blower fan MG1; The present embodiment audio power amplifier intelligent DC blower fan control system also comprises data acquisition circuit, amplification buffer circuit, radiator temperature sensor circuit, transformer temperature sensor circuit, band A/D single chip circuit and draught fan control circuit; Data acquisition circuit input end connects audio power amplifier output terminal, and data acquisition circuit output terminal connects amplification buffer circuit; Specific embodiment is, in this enforcement, data acquisition circuit is current data Acquisition Circuit, to have loudspeaker LS1 and accurate sample resistance R1 to be in series, the present embodiment sampling is convenient, by loudspeaker, connected with accurate sample resistance, according to output current, be converted into voltage, amplify the rear feed-in one-chip computer of buffering; Amplify the common i/o port of buffer circuit connecting band A/D single chip circuit; The common i/o port of radiator temperature sensor circuit connecting band A/D single chip circuit; The common i/o port of transformer temperature sensor circuit connecting band A/D single chip circuit; I/O port connecting fan control circuit with A/D single chip circuit; Draught fan control circuit connecting fan, controls the running of blower fan.
As shown in Figure 2, the circuit embodiment of concrete the present embodiment is to amplify buffer circuit and comprise the first capacitor C 1, the second resistance R 2, the 3rd resistance R 3, the second capacitor C 2, the 4th resistance R 4, operational amplifier IIC3A, the 5th resistance R 5, the 6th resistance R 6, the 7th resistance R 7, the first diode D1, the second diode D2, circuit connecting relation is, the first capacitance cathode and precision resistance R1 and loudspeaker LS1 are connected, the first electric capacity negative pole and the second resistance, the 3rd resistance is connected, be connected to the second resistance the other end and reference, the 3rd resistance the other end and operational amplifier negative terminal, the 4th resistance, the second electric capacity is connected, be connected to operational amplifier anode and reference, the 4th resistance the other end and the second electric capacity the other end, operational amplifier output terminal, the 5th resistance, the 6th resistance is connected, be connected to the 5th resistance the other end and reference, the 6th resistance and the first diode cathode are connected, the first diode cathode and the 7th resistance, the second diode cathode, A/D mouth with A/D single-chip microcomputer IC4 is connected, the 7th resistance the other end and the second diode cathode respectively with reference to be connected.Radiator temperature sensor circuit comprises the first temperature transducer IC1 and the 8th resistance R 8; What preferably, the first temperature transducer adopted is that model is DS1820 temperature transducer.Described the first temperature transducer GND pin with reference to ground, be connected, the first temperature transducer VCC pin is connected with+5V power supply, the first temperature transducer DA pin is connected with the 8th resistance, band A/D single-chip microcomputer respectively, the 8th resistance the other end and+5V power supply is connected.Transformer temperature sensor circuit comprises the second temperature transducer IC2 and the 9th resistance R 9; What preferably, the second temperature transducer adopted is that model is DS1820 temperature transducer.Described the second temperature transducer GND pin with reference to ground, be connected, the second temperature transducer VCC pin is connected with+5V power supply, the second temperature transducer DA pin is connected with the 9th resistance, band A/D single-chip microcomputer respectively, the 9th resistance the other end and+5V power supply is connected.Draught fan control circuit comprises: the tenth resistance R 10, optical coupler IC5, the 3rd diode D3, electric three capacitor C 3, the 4th capacitor C the 4, the 11 resistance R the 11, the 22 resistance R the 12, the 13 resistance R 13, field effect transistor Q1, the 5th capacitor C 5, the 4th diode D4, the 14 resistance R 14, circuit connecting relation is, described the tenth resistance is connected with band A/D single-chip processor i/o mouth, and the tenth resistance the other end and optical coupler 3 pin are connected, optical coupler 2 pin and+5V power supply is connected, described optical coupler 1, 4 pin are empty, and optical coupler 5 pin and the blower fan negative terminal FAN-that powers is connected, optical coupler 6 pin respectively with 7 pin, the 11 resistance, the 12 resistance is connected, and the 11 resistance the other end and blower fan power supply negative terminal FAN-is connected, and the 12 resistance the other end and fet gate are connected, and field effect transistor source electrode and the blower fan negative terminal FAN-that powers is connected, and field effect transistor drains respectively and blower fan negative pole, the 14 resistance, the 5th electric capacity, the 4th diode cathode is connected, blower fan positive pole respectively with the 14 resistance the other end, the 5th electric capacity the other end, the 4th diode cathode, the 13 resistance is connected, the 13 resistance the other end respectively with the 3rd electric capacity, the 4th capacitance cathode, the 3rd diode cathode, optical coupler 8 pin are connected, the three or two extreme pipe positive pole respectively with the 3rd electric capacity the other end, the 4th electric capacity negative pole is connected.
As shown in Figure 3, the present embodiment adopts PWM to change dutycycle mode and controls rotating speed.For high-power professional class, adopt DC fan forced air cooling radiating mode, will after the output current collection of audio power amplifier, be fed to one-chip computer; The temperature of radiator, transformer etc. is transmitted to one-chip computer in real time, by one-chip computer, according to above-mentioned situation, judge rear employing PWM mode and control rotation speed of fan.Automatically operation after the burned program of band A/D single-chip microcomputer, with temperature stepless speed regulating blower fan; Also according to press presupposed solution at the rate of temperature change of different temperature sections, change fan speed increment; Also according to press presupposed solution at the output current variance ratio of different output current sections, change fan speed increment.Thereby can Intelligent forced when high-power output and high temperature change fast increase rotation speed of fan, accelerate heat radiation, thereby guarantee machine reliable operation.
" embodiment " that spoken of in this manual, " another embodiment ", " embodiment ", etc., refer to specific features, structure or the feature in conjunction with this embodiment, described and be included at least one embodiment that the application's generality describes.In specification, a plurality of local appearance statement of the same race is not necessarily to refer to same embodiment.Furthermore, while describing a specific features, structure or feature in conjunction with any embodiment, what advocate is in conjunction with other embodiments, to realize this feature, structure or feature also to drop in scope of the present utility model.
Although a plurality of explanatory embodiment with reference to model utility is described the utility model here, but, should be appreciated that, those skilled in the art can design a lot of other modification and mode of executions, and these are revised and within mode of execution will drop on the disclosed principle scope and spirit of the application.More particularly, in the scope of, accompanying drawing open in the application and claim, can carry out multiple modification and improvement to the constituent elements of subject combination layout and/or layout.Except modification that constituent elements and/or layout are carried out with improving, to those skilled in the art, other purposes will be also obvious.
Claims (9)
1. an audio power amplifier intelligent DC blower fan control system, comprises blower fan; It is characterized in that: described audio power amplifier intelligent DC blower fan control system also comprises data acquisition circuit, amplifies buffer circuit, temperature sensor circuit, band A/D single chip circuit and draught fan control circuit; Described data acquisition circuit input end connects audio power amplifier output terminal, and described data acquisition circuit output terminal connects amplification buffer circuit; Described amplification buffer circuit connecting band A/D single chip circuit; Described temperature sensor circuit connecting band A/D single chip circuit; Described band A/D single chip circuit connecting fan control circuit; Described draught fan control circuit connecting fan.
2. audio power amplifier intelligent DC blower fan control system according to claim 1, is characterized in that described temperature sensor circuit comprises: radiator temperature sensor circuit and transformer temperature sensor circuit; Described radiator temperature sensor circuit is connected with described band A/D single chip circuit; Described transformer temperature sensor circuit is connected with described band A/D single chip circuit.
3. audio power amplifier intelligent DC blower fan control system according to claim 1, is characterized in that described data acquisition circuit comprises loudspeaker and accurate sample resistance; Described loudspeaker are connected with described accurate sample resistance; Described loudspeaker connect audio power amplifier output terminal.
4. audio power amplifier intelligent DC blower fan control system according to claim 1, is characterized in that described amplification buffer circuit comprises the first electric capacity, the second resistance, the 3rd resistance, the second electric capacity, the 4th resistance, operational amplifier, the 5th resistance, the 6th resistance, the 7th resistance, the first diode, the second diode, described the first capacitance cathode and precision resistance and loudspeaker are connected, the first electric capacity negative pole and the second resistance, the 3rd resistance is connected, be connected to the second resistance the other end and reference, the 3rd resistance the other end and operational amplifier negative terminal, the 4th resistance, the second electric capacity is connected, be connected to operational amplifier anode and reference, the 4th resistance the other end and the second electric capacity the other end, operational amplifier output terminal, the 5th resistance, the 6th resistance is connected, be connected to the 5th resistance the other end and reference, the 6th resistance and the first diode cathode are connected, the first diode cathode and the 7th resistance, the second diode cathode, A/D mouth with A/D single-chip microcomputer is connected, the 7th resistance the other end and the second diode cathode respectively with reference to be connected.
5. audio power amplifier intelligent DC blower fan control system according to claim 2, is characterized in that described radiator temperature sensor circuit comprises the first temperature transducer and the 8th resistance; Described the first temperature transducer GND pin with reference to ground, be connected, the first temperature transducer VCC pin is connected with+5V power supply, the first temperature transducer DA pin is connected with the 8th resistance, band A/D single-chip microcomputer respectively, the 8th resistance the other end and+5V power supply is connected.
6. audio power amplifier intelligent DC blower fan control system according to claim 2, is characterized in that described transformer temperature sensor circuit comprises the second temperature transducer and the 9th resistance; Described the second temperature transducer GND pin with reference to ground, be connected, the second temperature transducer VCC pin is connected with+5V power supply, the second temperature transducer DA pin is connected with the 9th resistance, band A/D single-chip microcomputer respectively, the 9th resistance the other end and+5V power supply is connected.
7. audio power amplifier intelligent DC blower fan control system according to claim 1, is characterized in that described draught fan control circuit comprises: the tenth resistance, optical coupler, the 3rd diode, electric three electric capacity, the 4th electric capacity, the 11 resistance, the 22 resistance, the 13 resistance, field effect transistor, the 5th electric capacity, the 4th diode, the 14 resistance, described the tenth resistance is connected with band A/D single-chip processor i/o mouth, the tenth resistance the other end and optical coupler 3 pin are connected, optical coupler 2 pin are connected with+5V power supply, described optical coupler 1, 4 pin are empty, optical coupler 5 pin and blower fan power supply negative terminal FAN-are connected, optical coupler 6 pin respectively with 7 pin, the 11 resistance, the 12 resistance is connected, the 11 resistance the other end and blower fan power supply negative terminal FAN-are connected, the 12 resistance the other end and fet gate are connected, field effect transistor source electrode and blower fan power supply negative terminal FAN-are connected, field effect transistor drain electrode respectively with blower fan negative pole, the 14 resistance, the 5th electric capacity, the 4th diode cathode is connected, blower fan positive pole respectively with the 14 resistance the other end, the 5th electric capacity the other end, the 4th diode cathode, the 13 resistance is connected, the 13 resistance the other end respectively with the 3rd electric capacity, the 4th capacitance cathode, the 3rd diode cathode, optical coupler 8 pin are connected, the three or two extreme pipe positive pole respectively with the 3rd electric capacity the other end, the 4th electric capacity negative pole is connected.
8. audio power amplifier intelligent DC blower fan control system according to claim 5, is characterized in that the first described temperature transducer is that model is DS1820 temperature transducer.
9. audio power amplifier intelligent DC blower fan control system according to claim 6, is characterized in that the second described temperature transducer is that model is DS1820 temperature transducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420161840.1U CN203835769U (en) | 2014-04-03 | 2014-04-03 | Intelligent direct-current fan control system of audio power amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420161840.1U CN203835769U (en) | 2014-04-03 | 2014-04-03 | Intelligent direct-current fan control system of audio power amplifier |
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| CN203835769U true CN203835769U (en) | 2014-09-17 |
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| CN201420161840.1U Expired - Lifetime CN203835769U (en) | 2014-04-03 | 2014-04-03 | Intelligent direct-current fan control system of audio power amplifier |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107517579A (en) * | 2017-10-25 | 2017-12-26 | 成都西井科技有限公司 | A kind of radiator of power amplifier |
-
2014
- 2014-04-03 CN CN201420161840.1U patent/CN203835769U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107517579A (en) * | 2017-10-25 | 2017-12-26 | 成都西井科技有限公司 | A kind of radiator of power amplifier |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent of invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Wang Qing Inventor before: Wang Qing Inventor before: Su Jie |
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| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: WANG QING SU JIE TO: WANG QING |
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| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 621000 Mianyang city of Sichuan province Youxian Economic Experimental Zone in the road No. 36 Patentee after: SICHUAN HUSHAN ELECTRICAL APPLIANCE CO.,LTD. Address before: 621000 Mianyang city of Sichuan province Youxian Economic Experimental Zone in the road No. 36 Patentee before: SICHUAN HUSHAN ELECTRIC APPLIANCE Co.,Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140917 |