CN201753692U - Direct current (DC) frequency conversion electric fan - Google Patents
Direct current (DC) frequency conversion electric fan Download PDFInfo
- Publication number
- CN201753692U CN201753692U CN2010202893183U CN201020289318U CN201753692U CN 201753692 U CN201753692 U CN 201753692U CN 2010202893183 U CN2010202893183 U CN 2010202893183U CN 201020289318 U CN201020289318 U CN 201020289318U CN 201753692 U CN201753692 U CN 201753692U
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- electric fan
- frequency conversion
- conversion electric
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Abstract
The utility model discloses a DC frequency conversion electric fan with a motor (5) which is a three-phase motor, between the alternating current (AC)mains supply access end and the motor (5) being in order disposed a rectifier circuit (1) for converting the AC to DC, a filter circuit (3) for realizing filter smooth and energy storage functions of the DC, and a inversion circuit (4) for converting DC to AC and subsequently realizing frequency modulation and pressure regulation, wherein the inversion circuit (4) is also connected to a driving signal end of the microprocessor circuit (6). The DC frequency conversion electric fan can greatly save energy and increase comfortableness.
Description
Technical field
The utility model relates to the speed governing field of electric fan, relates in particular to a kind of direct-current frequency conversion electric fan.
Background technique
Domestic electric fan generally adopts the single phase alternating current asynchronous motor at present, and following several mode of speed regulation is arranged usually:
The speed governing of first reactor by reducing the motor input voltage, realizes the speed governing purpose.This mode is carried out speed governing by the input voltage that reduces fan electromotor, because the voltage consumption that reduces is on reactor, power consumption is more energy-conservation.
It two is tap speed governing, changes motor speed by the operation winding that changes motor, realizes the speed governing purpose.Because the third gear speed governing is adopted in the tap speed governing usually, it is limited that speed can not be regulated speed adjustable range continuously, and comfort level is poor.
It three is electronic speed regulations, by regulating voltage, realizes the speed governing purpose.Though electronic speed regulation speed can be regulated among a small circle continuously come regulating voltage owing to utilize controllable silicon to adjust the conductance for alternating current current flow angle, output be not sinusoidal wave, produce bigger humorous wave interference, energy-saving effect is not obvious.
The model utility content
In view of this, the utility model provides a kind of direct-current frequency conversion electric fan, can realize energy-conservation significantly, as to improve comfort level purpose.
For solving above technical problem, the technical solution of the utility model is, a kind of direct-current frequency conversion electric fan, and its motor (5) is a three phase electric machine; Be disposed with between civil power incoming end and the described motor (5): be used for Ac is converted to galvanic rectification circuit (1), is used to realize that galvanic filtering smoothly reaches the eliminator of energy storage effect (3) and is used to finish direct current is realized inverter circuit (4) from frequency modulation and voltage modulation to the Ac conversion, wherein, this inverter (4) also connects the drive signal end of microcontroller circuit (6).
More preferably, described microcontroller circuit (6) is single-chip microcomputer or special integrated chip.
More preferably, described microcontroller circuit (6) is made up of DSP digital signal processor and peripheral circuit.
More preferably, described inverter circuit (4) comprises power model and drive circuit composition.
More preferably, described power model is an Intelligent Power Module.
More preferably, described power model is made up of a plurality of semiconductor power devices.
More preferably, described semiconductor power device is MOSFET or IGBT.
More preferably, also comprise power factor correction circuit (2), be arranged between described rectification circuit (1) and the described eliminator (3), and connect the Active PFC end of described microcontroller circuit (6).
More preferably, also comprise man-machine interface circuit (7), connect the input end of described microcontroller circuit (6).
More preferably, described motor (5) is three-phase permanent magnet synchronous motor or three-phase direct-current brushless motor.
Compared with prior art, the utility model adopts three phase electric machine, uses variable-frequency control technique simultaneously, can realize maximized energy-saving effect.During the electric fan operation, rotating speed is low more, and energy consumption is few more; And rotating speed is adjustable continuously, improves comfort level.Especially, when adopting three-phase motor with permanent magnets, same air quantity or rotating speed only need more lower powered motor can realize that energy-saving effect is more obvious.
Description of drawings
Fig. 1 is the constitutional diagram of the utility model direct-current frequency conversion electric fan one preferred embodiment;
Fig. 2 is an example of inverter circuit and microcontroller circuit among Fig. 1.
Embodiment
The utility model can solve the technical disadvantages of existing electric fan, and it is by using micro computer and power semiconductor technologies, can realize energy-conservation significantly and improves the purpose of comfort level.Its basic design is that converter technology is applied on the electric fan; And, for reaching better energy-saving effect, and motor is replaced by three phase electric machine.
This fan is preferably the magneto frequency conversion electric fan, and its motor can be three-phase permanent magnet synchronous motor, three-phase direct-current brushless motor etc., is commonly called as to be direct-current frequency conversion electric fan.
For further understanding basic principle of the present utility model and structure, the utility model is described below in conjunction with drawings and Examples.
Referring to Fig. 1, the composition of the utility model direct-current frequency conversion electric fan one preferred embodiment is shown, comprise parts such as rectification circuit 1, circuit of power factor correction (PFC) 2, eliminator 3, inverter circuit 4, microcontroller circuit 6, man-machine interface circuit 7, wherein: rectification circuit 1, eliminator 3, inverter circuit 4 are successively set between civil power incoming end and the motor 5; Circuit of power factor correction 2 is arranged between rectification circuit 1 and the eliminator 3; The drive signal end of microcontroller circuit 6 connects that inverter circuit 4, Active PFC end connect power factor correction circuit 2, input end connects man-machine interface circuit 7, so that carry out related data respectively with it mutual.
Below the composition and the function of each several part circuit are carried out brief description.
Circuit of power factor correction 2 is a selectable unit (SU), is made up of power semiconductor and control chip, and effect is to make input current near sinusoidal wave, reduces mains by harmonics content, realizes improving the purpose of power factor.
Eliminator 3 mainly is made up of elements such as electrochemical capacitors, finishes the level and smooth and energy storage effect of galvanic filtering.
Inverter circuit 4 is made up of power semiconductor and drive circuit, can be single power device such as MOSFET (MetalOxide Semicoductor Field Effect Transistor, be metal oxide semiconductor field effect tube), IGBT (Insulated Gate Bipolar Transistor, be insulated gate bipolar transistor) etc. form with driving chip, also can be Intelligent Power Module.The major function of this inverter circuit 4 is to finish the conversion of direct current to threephase AC, realization frequency modulation and voltage modulation purpose.
Man-machine interface circuit 7 mainly is made up of control switch, button, remote controller and display circuit, and the people carries out control operation by button or remote controller to fan, and display circuit shows fan work state and fault message.
Because existing fan motor generally adopts the single phase alternating current asynchronous motor, itself is bigger than three phase electric machine efficient low energy consumption height, noise, so no matter adopt which kind of speed regulating method, energy-saving effect is all not obvious.And adopt three phase electric machine in the utility model, and use variable-frequency control technique simultaneously, can realize maximized energy-saving effect: its rotating speed is low more, and energy consumption is few more, and rotating speed is adjustable continuously.And if motor adopts three-phase motor with permanent magnets, then same air quantity or rotating speed only need more lower powered motor can realize that energy-saving effect is more obvious.
It should be noted that most important parts is inverter circuit 4 and microcontroller circuit 6 in the utility model, these two parts cooperatively interact, and finally finish the frequency control of motor speed purpose of fan electromotor, below describe with a practical circuit.
Referring to Fig. 2, be the example of inverter circuit and microcontroller circuit, its working method is: civil power becomes direct current through rectification circuit 1, after electrochemical capacitor filtering, inserts the two ends of the DC electrical source 41 of inverter circuit 4.And the microprocessor of microcontroller circuit 6 (MCU/DSP) 61 setting signals according to the man-machine interface circuit are controlled fan electromotor 5.
During start, microprocessor 61 produces corresponding 6 road pulse width modulating signals, i.e. drive signal PWM1～PWM6 according to the wind speed of setting; Drive 6 power tubes (MOSFET or IGBT) S1～S6 by power tube driving chip 42; The alternate conduction of these power tubes and shutoff produce the three-phase modulations waveform, and the threephase AC of Adjustable Output Voltage, changeable frequency is exported to U, V, the W terminal of fan electromotor 5, thereby realize the stepless frequency control of fan.
The utility model is used microcomputerized control technology, electric semiconductor technology, belongs to technical field of automatic control, and its key point is variable-frequency control technique and the application of three phase electric machine in fan, and energy-conservation be its most outstanding characteristics.The motor of this DC frequency-changing fan is a three phase electric machine, specifically can be three-phase permanent magnet synchronous motor, three-phase direct-current brushless motor etc., and their energy-saving effect is better.
In addition,, can also give motor mounting point sensor,, its objective is the convenient rotor position information that detects motor, so that regulate rotating speed of motor better as Hall transducer, photoelectric encoder etc. according to actual use condition.
The utility model can be used as a parts use mounted thereto of electric fan, also can make a product and electric fan separately and be used, and can extensively fan and be applicable to domestic electric fan, commercial power fan etc.
Only be preferred implementation of the present utility model below, should be pointed out that above-mentioned preferred implementation should not be considered as restriction of the present utility model, protection domain of the present utility model should be as the criterion with claim institute restricted portion.For those skilled in the art, in not breaking away from spirit and scope of the present utility model, can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (10)
1. a direct-current frequency conversion electric fan is characterized in that, the motor of described direct-current frequency conversion electric fan (5) is a three phase electric machine; Be disposed with between civil power incoming end and the described motor (5): be used for Ac is converted to galvanic rectification circuit (1), is used to realize that galvanic filtering smoothly reaches the eliminator of energy storage effect (3) and is used to finish direct current is realized inverter circuit (4) from frequency modulation and voltage modulation to the Ac conversion, wherein, this inverter (4) also connects the drive signal end of microcontroller circuit (6).
2. direct-current frequency conversion electric fan as claimed in claim 1 is characterized in that, described microcontroller circuit (6) is single-chip microcomputer or special integrated chip.
3. direct-current frequency conversion electric fan as claimed in claim 1 is characterized in that, described microcontroller circuit (6) is made up of DSP digital signal processor and peripheral circuit.
4. direct-current frequency conversion electric fan as claimed in claim 1 is characterized in that, described inverter circuit (4) comprises power model and drive circuit composition.
5. direct-current frequency conversion electric fan as claimed in claim 4 is characterized in that, described power model is an Intelligent Power Module.
6. direct-current frequency conversion electric fan as claimed in claim 4 is characterized in that described power model is made up of a plurality of semiconductor power devices.
7. direct-current frequency conversion electric fan as claimed in claim 6 is characterized in that, described semiconductor power device is MOSFET or IGBT.
8. direct-current frequency conversion electric fan as claimed in claim 1, it is characterized in that, also comprise power factor correction circuit (2), be arranged between described rectification circuit (1) and the described eliminator (3), and connect the Active PFC end of described microcontroller circuit (6).
9. direct-current frequency conversion electric fan as claimed in claim 1 is characterized in that, also comprises man-machine interface circuit (7), connects the input end of described microcontroller circuit (6).
10. as each described direct-current frequency conversion electric fan of claim 1～9, it is characterized in that described motor (5) is three-phase permanent magnet synchronous motor or three-phase direct-current brushless motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202893183U CN201753692U (en) | 2010-08-06 | 2010-08-06 | Direct current (DC) frequency conversion electric fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202893183U CN201753692U (en) | 2010-08-06 | 2010-08-06 | Direct current (DC) frequency conversion electric fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201753692U true CN201753692U (en) | 2011-03-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202893183U Expired - Fee Related CN201753692U (en) | 2010-08-06 | 2010-08-06 | Direct current (DC) frequency conversion electric fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201753692U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101892998A (en) * | 2010-08-06 | 2010-11-24 | 广州遨控电子科技有限公司 | Direct-current frequency conversion electric fan |
| CN106704239A (en) * | 2017-02-14 | 2017-05-24 | 国网新疆电力公司信息通信公司 | Temperature control device and variable-speed fan |
| CN110500304A (en) * | 2019-08-20 | 2019-11-26 | 广东美的白色家电技术创新中心有限公司 | Control system, control method and the electric appliance of blower |
-
2010
- 2010-08-06 CN CN2010202893183U patent/CN201753692U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101892998A (en) * | 2010-08-06 | 2010-11-24 | 广州遨控电子科技有限公司 | Direct-current frequency conversion electric fan |
| CN106704239A (en) * | 2017-02-14 | 2017-05-24 | 国网新疆电力公司信息通信公司 | Temperature control device and variable-speed fan |
| CN110500304A (en) * | 2019-08-20 | 2019-11-26 | 广东美的白色家电技术创新中心有限公司 | Control system, control method and the electric appliance of blower |
| CN110500304B (en) * | 2019-08-20 | 2021-08-31 | 广东美的白色家电技术创新中心有限公司 | Control system and control method of fan and electric appliance |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110302 Termination date: 20110806 |