CN101892998A - Direct-current frequency conversion electric fan - Google Patents
Direct-current frequency conversion electric fan Download PDFInfo
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- CN101892998A CN101892998A CN2010102514872A CN201010251487A CN101892998A CN 101892998 A CN101892998 A CN 101892998A CN 2010102514872 A CN2010102514872 A CN 2010102514872A CN 201010251487 A CN201010251487 A CN 201010251487A CN 101892998 A CN101892998 A CN 101892998A
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Abstract
The invention discloses a direct-current frequency conversion electric fan. A motor (5) of the electric fan is a three-phase motor; a rectification circuit (1) for converting alternating current into direct current, a filter circuit (3) for realizing the effects of filter smoothing and energy storage of the direct current and an inverter circuit (4) for converting the direct current into the alternating current to realize frequency modulation and voltage regulation are arranged between a commercial power access end and the motor (5), wherein an inverter (4) is also connected with the driving signal end of a microprocessor circuit (6). The direct-current frequency conversion electric fan can save energy substantially and improve the comfort level.
Description
Technical field
The present invention relates to the speed governing field of electric fan, relate 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.
Summary of the invention
In view of this, the invention 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, technological scheme of the present invention 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 present invention 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 direct-current frequency conversion electric fan one preferred embodiment of the present invention;
Fig. 2 is an example of inverter circuit and microcontroller circuit among Fig. 1.
Embodiment
The present invention 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 invention and structure, present invention is described below in conjunction with drawings and Examples.
Referring to Fig. 1, the composition of direct-current frequency conversion electric fan one preferred embodiment of the present invention 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 among the present invention, 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 among the present invention, 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 present invention uses 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 present invention 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 invention below, should be pointed out that above-mentioned preferred implementation should not be considered as limitation of the present invention, protection scope of the present invention should be as the criterion with claim institute restricted portion.For those skilled in the art, without departing from the spirit and scope of the present invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
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 |
|---|---|---|---|
| CN2010102514872A CN101892998A (en) | 2010-08-06 | 2010-08-06 | Direct-current frequency conversion electric fan |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102514872A CN101892998A (en) | 2010-08-06 | 2010-08-06 | Direct-current frequency conversion electric fan |
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| CN101892998A true CN101892998A (en) | 2010-11-24 |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102619768A (en) * | 2011-12-26 | 2012-08-01 | 格力电器（中山）小家电制造有限公司 | DC (direct current) brushless electric fan and control method thereof |
| CN103133364A (en) * | 2011-11-28 | 2013-06-05 | 富瑞精密组件（昆山）有限公司 | Electric fan |
| CN103961771A (en) * | 2014-04-09 | 2014-08-06 | 邓旋 | Medical compression type atomizer |
| CN104092121A (en) * | 2014-07-24 | 2014-10-08 | 诸暨市沃思环保技术有限公司 | Floor type power distribution cabinet of tunnel dedusting car |
| CN104088659A (en) * | 2014-07-24 | 2014-10-08 | 诸暨市沃思环保技术有限公司 | Dust removal device of tunnel dust removal vehicle |
| CN104092105A (en) * | 2014-07-24 | 2014-10-08 | 诸暨市沃思环保技术有限公司 | Wiring structure of power distribution cabinet of tunnel dust removing vehicle |
| CN104092107A (en) * | 2014-07-24 | 2014-10-08 | 诸暨市沃思环保技术有限公司 | Power distribution cabinet of tunnel dust removing vehicle |
| CN104104238A (en) * | 2014-07-22 | 2014-10-15 | 诸暨市沃思环保技术有限公司 | Drive module of power supply system of buried sewage treatment equipment fan room |
| CN104104074A (en) * | 2014-07-22 | 2014-10-15 | 诸暨市沃思环保技术有限公司 | Connecting cable of power supply system of buried sewage treatment equipment fan room |
| CN104124676A (en) * | 2014-07-22 | 2014-10-29 | 诸暨市沃思环保技术有限公司 | Cable connection structure of power supply system of buried sewage treatment equipment |
| AT515017A1 (en) * | 2013-11-12 | 2015-05-15 | Brainchain Ag | Drive device for an impeller of a turbomachine |
| CN105050308A (en) * | 2015-08-04 | 2015-11-11 | 北京无线电测量研究所 | Device and method for modulating hyper-stable high power pulse |
| CN104235045B (en) * | 2014-08-11 | 2016-04-27 | 重庆长安汽车股份有限公司 | The dynamometer rack air cooling system automatically adjusting wind speed |
| CN106026845A (en) * | 2016-06-21 | 2016-10-12 | 珠海格力电器股份有限公司 | Fan drive device, air-conditioning system and fan drive method of air-conditioning system |
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| US20060208686A1 (en) * | 2003-10-09 | 2006-09-21 | Masayuki Takada | Brushless dc motor coupled directly to ac source and electric apparatus using the same motor |
| CN1864320A (en) * | 2003-10-09 | 2006-11-15 | 松下电器产业株式会社 | Ac power supply direct-coupled brushless DC motor and electric apparatus equipped therewith |
| JP2005257258A (en) * | 2004-02-13 | 2005-09-22 | Fuji Electric Systems Co Ltd | Fin filter unit |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103133364A (en) * | 2011-11-28 | 2013-06-05 | 富瑞精密组件（昆山）有限公司 | Electric fan |
| CN102619768A (en) * | 2011-12-26 | 2012-08-01 | 格力电器（中山）小家电制造有限公司 | DC (direct current) brushless electric fan and control method thereof |
| AT515017B1 (en) * | 2013-11-12 | 2018-05-15 | Zitt Motoren Ag | Drive device for an impeller of a turbomachine |
| AT515017A1 (en) * | 2013-11-12 | 2015-05-15 | Brainchain Ag | Drive device for an impeller of a turbomachine |
| CN103961771A (en) * | 2014-04-09 | 2014-08-06 | 邓旋 | Medical compression type atomizer |
| CN104104074A (en) * | 2014-07-22 | 2014-10-15 | 诸暨市沃思环保技术有限公司 | Connecting cable of power supply system of buried sewage treatment equipment fan room |
| CN104124676A (en) * | 2014-07-22 | 2014-10-29 | 诸暨市沃思环保技术有限公司 | Cable connection structure of power supply system of buried sewage treatment equipment |
| CN104104238A (en) * | 2014-07-22 | 2014-10-15 | 诸暨市沃思环保技术有限公司 | Drive module of power supply system of buried sewage treatment equipment fan room |
| CN104088659A (en) * | 2014-07-24 | 2014-10-08 | 诸暨市沃思环保技术有限公司 | Dust removal device of tunnel dust removal vehicle |
| CN104092107A (en) * | 2014-07-24 | 2014-10-08 | 诸暨市沃思环保技术有限公司 | Power distribution cabinet of tunnel dust removing vehicle |
| CN104092105A (en) * | 2014-07-24 | 2014-10-08 | 诸暨市沃思环保技术有限公司 | Wiring structure of power distribution cabinet of tunnel dust removing vehicle |
| CN104092121A (en) * | 2014-07-24 | 2014-10-08 | 诸暨市沃思环保技术有限公司 | Floor type power distribution cabinet of tunnel dedusting car |
| CN104235045B (en) * | 2014-08-11 | 2016-04-27 | 重庆长安汽车股份有限公司 | The dynamometer rack air cooling system automatically adjusting wind speed |
| CN105050308A (en) * | 2015-08-04 | 2015-11-11 | 北京无线电测量研究所 | Device and method for modulating hyper-stable high power pulse |
| CN105050308B (en) * | 2015-08-04 | 2017-10-24 | 北京无线电测量研究所 | A kind of apparatus and method of overstable highpowerpulse modulation |
| CN106026845A (en) * | 2016-06-21 | 2016-10-12 | 珠海格力电器股份有限公司 | Fan drive device, air-conditioning system and fan drive method of air-conditioning system |
| CN106026845B (en) * | 2016-06-21 | 2019-05-07 | 珠海格力电器股份有限公司 | A kind of fan drive device, air-conditioning system and its blower driving method |
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Application publication date: 20101124 |