CN204794730U - AC changes DC's brushless radiator fan drive circuit - Google Patents
AC changes DC's brushless radiator fan drive circuit Download PDFInfo
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- CN204794730U CN204794730U CN201520377775.0U CN201520377775U CN204794730U CN 204794730 U CN204794730 U CN 204794730U CN 201520377775 U CN201520377775 U CN 201520377775U CN 204794730 U CN204794730 U CN 204794730U
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Abstract
The utility model discloses a AC changes DC's brushless radiator fan drive circuit relates to power driving circuit technical field. Drive circuit includes high -pressure protective film piece, rectifier module, filter module, DCDC voltage reducing module, motor drive module and rotational speed detection module, the input termination alternating current of high pressure protective film piece, the output of high -pressure protective film piece is connected with rectifier module's input, rectifier module's output is connected with filter module's input, filter module's output is connected with DCDC voltage reducing module's input, DCDC voltage reducing module's the output and the input of motor drive module are connected, the rotational speed signal output part and rotational speed detection module's the input of motor drive module are connected, rotational speed detection module's output is rotational speed signal output part. Drive circuit has simple structure, reliable, with low costs, the small characteristics of operation.
Description
Technical field
The utility model relates to power driving circuit technical field, particularly relates to the brushless radiating fan drive circuit that a kind of AC turns DC.
Background technology
Now AC110V-220V radiator fan commercially uses alternating current machine to drive, alternating current machine inefficiency, Switching Power Supply constant-current decompression is used to add rear class brushless electric machine drive efficiency high, alternating current machine rotating speed is determined by frequency of supply, and step-down mode rotating speed can break through restriction, and alternating current machine volume is large, easily causes temperature too high and be not suitable for mobile use.
Utility model content
Technical problem to be solved in the utility model is to provide the brushless radiating fan drive circuit that a kind of AC turns DC, and described drive circuit has the advantages that structure is simple, reliable, cost is low, volume is little.
For solving the problems of the technologies described above, technical solution adopted in the utility model is: a kind of AC turns the brushless radiating fan drive circuit of DC, it is characterized in that: comprise high voltage protective module, rectification module, filtration module, DC/DC voltage reduction module, motor driving module and rotating speed detecting module, the input termination alternating current of described high voltage protective module, the output of high voltage protective module is connected with the input of rectification module, and high voltage protective module is used for preventing overtension from protecting subsequent module; The output of rectification module is connected with the input of filtration module, for the ac-dc conversion of voltage; The output of filtration module is connected with the input of DC/DC voltage reduction module, carries out filtering for the voltage exported rectification module; The output of DC/DC voltage reduction module is connected with the input of motor driving module, after filtered voltage is carried out step-down process, be supplied to motor driving module; The tach signal output of motor driving module is connected with the input of rotating speed detecting module, for drive fan motor movement; The output of described rotating speed detecting module is tach signal output.
Further technical scheme is: a power input of described drive circuit connects an input of rectification chip U2 through insurance F1, another power input of described drive circuit is connected with another input of rectification chip U2; Piezo-resistance R1 is connected in parallel on the power input of drive circuit; Filter capacitor C1 is connected in parallel on the output of rectification chip U2; The 5-8 pin of DC/DC step-down chip U1 connects the cathode output end of rectification chip U2; 1 pin of DC/DC step-down chip U1 connects 1 pin of motor driving chip U3 successively through electric capacity C2, diode D3; 2 pin of DC/DC step-down chip U1 connect 1 pin of motor driving chip U3 through inductance L 1; 3 pin of DC/DC step-down chip U1 connect the node of electric capacity C2 and diode D3 through voltage stabilizing didoe D2; 4 pin of DC/DC step-down chip U1 connect the node of electric capacity C2 and diode D3; The negative pole of diode D4 connects 2 pin of DC/DC step-down chip U1, the plus earth of diode D4; 1 pin of the one termination motor driving chip U3 of electric capacity C4, other end ground connection; 1 pin of the one termination motor driving chip U3 of electric capacity C5, other end ground connection; 1 pin of the one termination motor driving chip U3 of resistance R2, other end ground connection; 2 pin of motor driving chip U3 connect 1 pin of motor driving chip U3 through inductance L 2; 3 pin of motor driving chip U3 are divided into two-way, and the first via connects 1 pin of motor driving chip U3 through inductance L 3, and the second tunnel connects the base stage of triode Q1 through resistance R3; The base stage of the one termination triode Q1 of resistance R4, other end ground connection; The transmitting very tach signal output of triode Q1, the grounded emitter of triode Q1.
Further technical scheme is: described rectification chip U2 is full-bridge rectification module.
Further technical scheme is: described motor driving chip U3 is 266 type Hall switch modules.
Further technical scheme is: described DC/DC step-down chip U1 uses SDH8302.
The beneficial effect adopting technique scheme to produce is: high voltage protective module: use fuse or insurance resistance and piezo-resistance to form; when voltage is elevated to setting voltage; the resistance value of piezo-resistance reduces; big current is made to flow through piezo-resistance; breakdown fuse silk or insurance resistance; thus reach protection internal circuit, prevent from burning out effect on fire.Rectification module: ac input end input voltage is the voltage electricity exchanging 85V-265V, through rectification module full-bridge rectification, converts electric current.Filtration module: become direct voltage for DC/DC voltage reduction module through capacitor filtering after full-bridge rectification.
DC/DC voltage reduction module: DC/DC voltage reduction module forms non-isolated step-down constant-current circuit by DC/DC step-down chip U1 and peripheral component, power supply is provided by giving the driving of rear class electric motor fan after step-down, can ensure like this, on the basis that low-voltage direct fans drive is constant, to meet the requirement that electric main is powered simultaneously.Rotating speed detecting module output speed signal, drive IC commutation signal, by resistance current limliting dividing potential drop, drives triode Q1 to export square-wave signal, rotation speed relation: RPM=60*f/n, (f is output side's wave frequency, and n is that rotor magnet is to number of poles).
Described drive circuit can realize high-precision constant current and drive.Chip operation is in critical current mode continuous mode (TM), and operating voltage covers 85VAC-265VAC.Chip internal is integrated with 500V power device, and peripheral applications detects without the need to auxiliary winding and power supply can realize high precision constant current, greatly reduces external cost.
There is multiple constant current miscellaneous function, realize excellent linear compensation and high precision constant current effect.Driving works in critical current mode continuous mode (TM), and output current does not change with the change of inductance and load, has excellent adjustment of load characteristic.The integrated multi-protective function of IC, enhances the reliability of system greatly.Defencive function comprises motor and drives unloaded, heavy duty protection, short-circuit protection, under-voltage locking, current sampling resistor short-circuit protection and excess temperature regulatory function.For single IC drives, maximum space can be saved.The position in motor drive IC detection rotor magnetic field, drive stator line to contract for fixed output quotas simultaneously and give birth to the magnetic field of mutual exclusion with it, drive rotor rotates, and drive IC detects continuously, exports continuously.
To sum up, described drive circuit has the advantages that structure is simple, reliable, cost is low, volume is little.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Fig. 1 is theory diagram of the present utility model;
Fig. 2 is circuit theory diagrams of the present utility model.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only a part of embodiment of the present utility model, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Set forth a lot of detail in the following description so that fully understand the utility model, but the utility model can also adopt other to be different from alternate manner described here to implement, those skilled in the art can when doing similar popularization without prejudice to when the utility model intension, and therefore the utility model is by the restriction of following public specific embodiment.
As shown in Figure 1, the utility model discloses the brushless radiating fan drive circuit that a kind of AC turns DC, comprise high voltage protective module, rectification module, filtration module, DC/DC voltage reduction module, motor driving module and rotating speed detecting module, the input termination alternating current of described high voltage protective module, the output of high voltage protective module is connected with the input of rectification module, and high voltage protective module is used for preventing overtension from protecting subsequent module; The output of rectification module is connected with the input of filtration module, for the ac-dc conversion of voltage; The output of filtration module is connected with the input of DC/DC voltage reduction module, carries out filtering for the voltage exported rectification module; The output of DC/DC voltage reduction module is connected with the input of motor driving module, after filtered voltage is carried out step-down process, be supplied to motor driving module; The tach signal output of motor driving module is connected with the input of rotating speed detecting module, for drive fan motor movement; The output of described rotating speed detecting module is tach signal output.
Concrete circuit connecting relation as shown in Figure 2, a power input of described drive circuit connects an input of rectification chip U2 through insurance F1, another power input of described drive circuit is connected with another input of rectification chip U2, and described rectification chip U2 is full-bridge rectification module; Piezo-resistance R1 is connected in parallel on the power input of drive circuit; Filter capacitor C1 is connected in parallel on the output of rectification chip U2; The 5-8 pin of DC/DC step-down chip U1 connects the cathode output end of rectification chip U2; 1 pin of DC/DC step-down chip U1 connects 1 pin of motor driving chip U3 successively through electric capacity C2, diode D3, described DC/DC step-down chip U1 can use SDH8302; 2 pin of DC/DC step-down chip U1 connect 1 pin of motor driving chip U3 through inductance L 1; 3 pin of DC/DC step-down chip U1 connect the node of electric capacity C2 and diode D3 through voltage stabilizing didoe D2; 4 pin of DC/DC step-down chip U1 connect the node of electric capacity C2 and diode D3; The negative pole of diode D4 connects 2 pin of DC/DC step-down chip U1, the plus earth of diode D4; 1 pin of the one termination motor driving chip U3 of electric capacity C4, other end ground connection; 1 pin of the one termination motor driving chip U3 of electric capacity C5, other end ground connection; 1 pin of the one termination motor driving chip U3 of resistance R2, other end ground connection; 2 pin of motor driving chip U3 connect 1 pin of motor driving chip U3 through inductance L 2; 3 pin of motor driving chip U3 are divided into two-way, and the first via connects 1 pin of motor driving chip U3 through inductance L 3, and the second tunnel connects the base stage of triode Q1 through resistance R3; The base stage of the one termination triode Q1 of resistance R4, other end ground connection; The transmitting very tach signal output of triode Q1, the grounded emitter of triode Q1; Described motor driving chip U3 can be 266 type Hall switch modules.
High voltage protective module: use fuse or insurance resistance and piezo-resistance to form, when voltage is elevated to setting voltage, the resistance value of piezo-resistance reduces; big current is made to flow through piezo-resistance; breakdown fuse silk or insurance resistance, thus reach protection internal circuit, prevent from burning out effect on fire.Rectification module: ac input end input voltage is the voltage electricity exchanging 85V-265V, through rectification module full-bridge rectification, converts electric current.Filtration module: become direct voltage for DC/DC voltage reduction module through capacitor filtering after full-bridge rectification.
DC/DC voltage reduction module: DC/DC voltage reduction module forms non-isolated step-down constant-current circuit by DC/DC step-down chip U1 and peripheral component, power supply is provided by giving the driving of rear class electric motor fan after step-down, can ensure like this, on the basis that low-voltage direct fans drive is constant, to meet the requirement that electric main is powered simultaneously.Rotating speed detecting module output speed signal, drive IC commutation signal, by resistance current limliting dividing potential drop, drives triode Q1 to export square-wave signal, rotation speed relation: RPM=60*f/n, (f is output side's wave frequency, and n is that rotor magnet is to number of poles).
Described drive circuit can realize high-precision constant current and drive.Chip operation is in critical current mode continuous mode (TM), and operating voltage covers 85VAC-265VAC.Chip internal is integrated with 500V power device, and peripheral applications detects without the need to auxiliary winding and power supply can realize high precision constant current, greatly reduces external cost.
There is multiple constant current miscellaneous function, realize excellent linear compensation and high precision constant current effect.Driving works in critical current mode continuous mode (TM), and output current does not change with the change of inductance and load, has excellent adjustment of load characteristic.The integrated multi-protective function of IC, enhances the reliability of system greatly.Defencive function comprises motor and drives unloaded, heavy duty protection, short-circuit protection, under-voltage locking, current sampling resistor short-circuit protection and excess temperature regulatory function.For single IC drives, maximum space can be saved.The position in motor drive IC detection rotor magnetic field, drive stator line to contract for fixed output quotas simultaneously and give birth to the magnetic field of mutual exclusion with it, drive rotor rotates, and drive IC detects continuously, exports continuously.
To sum up, described drive circuit has the advantages that structure is simple, reliable, cost is low, volume is little.
Claims (5)
1. an AC turns the brushless radiating fan drive circuit of DC, it is characterized in that: comprise high voltage protective module, rectification module, filtration module, DC/DC voltage reduction module, motor driving module and rotating speed detecting module, the input termination alternating current of described high voltage protective module, the output of high voltage protective module is connected with the input of rectification module, and high voltage protective module is used for preventing overtension from protecting subsequent module; The output of rectification module is connected with the input of filtration module, for the ac-dc conversion of voltage; The output of filtration module is connected with the input of DC/DC voltage reduction module, carries out filtering for the voltage exported rectification module; The output of DC/DC voltage reduction module is connected with the input of motor driving module, after filtered voltage is carried out step-down process, be supplied to motor driving module; The tach signal output of motor driving module is connected with the input of rotating speed detecting module, for drive fan motor movement; The output of described rotating speed detecting module is tach signal output.
2. AC according to claim 1 turns the brushless radiating fan drive circuit of DC, it is characterized in that: a power input of described drive circuit connects an input of rectification chip U2 through insurance F1, another power input of described drive circuit is connected with another input of rectification chip U2; Piezo-resistance R1 is connected in parallel on the power input of drive circuit; Filter capacitor C1 is connected in parallel on the output of rectification chip U2; The 5-8 pin of DC/DC step-down chip U1 connects the cathode output end of rectification chip U2; 1 pin of DC/DC step-down chip U1 connects 1 pin of motor driving chip U3 successively through electric capacity C2, diode D3; 2 pin of DC/DC step-down chip U1 connect 1 pin of motor driving chip U3 through inductance L 1; 3 pin of DC/DC step-down chip U1 connect the node of electric capacity C2 and diode D3 through voltage stabilizing didoe D2; 4 pin of DC/DC step-down chip U1 connect the node of electric capacity C2 and diode D3; The negative pole of diode D4 connects 2 pin of DC/DC step-down chip U1, the plus earth of diode D4; 1 pin of the one termination motor driving chip U3 of electric capacity C4, other end ground connection; 1 pin of the one termination motor driving chip U3 of electric capacity C5, other end ground connection; 1 pin of the one termination motor driving chip U3 of resistance R2, other end ground connection; 2 pin of motor driving chip U3 connect 1 pin of motor driving chip U3 through inductance L 2; 3 pin of motor driving chip U3 are divided into two-way, and the first via connects 1 pin of motor driving chip U3 through inductance L 3, and the second tunnel connects the base stage of triode Q1 through resistance R3; The base stage of the one termination triode Q1 of resistance R4, other end ground connection; The transmitting very tach signal output of triode Q1, the grounded emitter of triode Q1.
3. AC according to claim 2 turns the brushless radiating fan drive circuit of DC, it is characterized in that: described rectification chip U2 is full-bridge rectification module.
4. AC according to claim 2 turns the brushless radiating fan drive circuit of DC, it is characterized in that: described motor driving chip U3 is 266 type Hall switch modules.
5. AC according to claim 2 turns the brushless radiating fan drive circuit of DC, it is characterized in that: described DC/DC step-down chip U1 uses SDH8302.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520377775.0U CN204794730U (en) | 2015-06-03 | 2015-06-03 | AC changes DC's brushless radiator fan drive circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520377775.0U CN204794730U (en) | 2015-06-03 | 2015-06-03 | AC changes DC's brushless radiator fan drive circuit |
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| CN204794730U true CN204794730U (en) | 2015-11-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520377775.0U Expired - Fee Related CN204794730U (en) | 2015-06-03 | 2015-06-03 | AC changes DC's brushless radiator fan drive circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106787746A (en) * | 2015-11-24 | 2017-05-31 | 宁波鑫泰电气科技有限公司 | Vehicle charger for electric vehicle circuit |
| CN110470988A (en) * | 2019-09-18 | 2019-11-19 | 东莞市润达散热风扇有限公司 | A kind of brushless motor multifunctional testing circuit |
-
2015
- 2015-06-03 CN CN201520377775.0U patent/CN204794730U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106787746A (en) * | 2015-11-24 | 2017-05-31 | 宁波鑫泰电气科技有限公司 | Vehicle charger for electric vehicle circuit |
| CN106787746B (en) * | 2015-11-24 | 2019-09-10 | 宁波鑫泰电气科技有限公司 | Vehicle charger for electric vehicle circuit |
| CN110470988A (en) * | 2019-09-18 | 2019-11-19 | 东莞市润达散热风扇有限公司 | A kind of brushless motor multifunctional testing circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151118 Termination date: 20160603 |