CN2921380Y - External rotor permanent magnetic brushless DC electric machine speed regulating centrifugal ventilator - Google Patents
External rotor permanent magnetic brushless DC electric machine speed regulating centrifugal ventilator Download PDFInfo
- Publication number
- CN2921380Y CN2921380Y CNU2006200859618U CN200620085961U CN2921380Y CN 2921380 Y CN2921380 Y CN 2921380Y CN U2006200859618 U CNU2006200859618 U CN U2006200859618U CN 200620085961 U CN200620085961 U CN 200620085961U CN 2921380 Y CN2921380 Y CN 2921380Y
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- control circuit
- sensor
- electric machine
- pwm inverter
- permanent magnetic
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Abstract
The utility model relates to an external rotor permanent magnetic brushless DC electric machine speed regulating centrifugal ventilator, consisting of a permanent magnetic brushless DC electric machine and a PWM inverter, the input end of which is connected with the power and the output end of which with the permanent magnetic brushless DC electric machine. The utility model is characterized in that a control circuit and a sensor are arranged, wherein the output end of the sensor is connected with the input end of the control circuit and the output end of the control circuit with the control end of the PWM inverter. The utility model is additionally provided with the control circuit and the sensor, wherein the output end of the sensor is connected with the input end of the control circuit and the output end of the control circuit with the control end of the PWM inverter. The ventilator can be controlled to regulate the volume and pressure of the ventilation with a better effect of regulating the volume, pressure of the ventilation and saving power than the regulating valve. The utility model has the advantages of high efficiency and high power as well as it can save the cost by 50 percent, elevate the efficiency by 3-5 percent and save electricity by 20 percent compared with the common electric machine transmitted centrifugal ventilator.
Description
Technical field
The utility model external rotor permanent magnet brshless DC motor speed governing centrifugal blower belongs to the air regenerating device field.
Background technique
The power consumption of ventilator product accounts for about 40% of national gross generation, is the industrial equipment of national power consumption maximum.Ventilator mostly adopts induction machine with motor at present, and the research emphasis of the energy-conservation aspect of ventilator always just is placed on the large fan, and Here it is adopts the mode of induction machine frequency control of motor speed to regulate the size of air quantity, thereby obtains energy-saving effect.Small-sized fan is because unit power consumption is lower, and the research of its energy-conservation aspect fails fully to be paid attention to always.In fact, though the power consumption of these small-sized fan separate units is very little, enormous amount, the power consumption that therefore reduces these small-sized fans has very far-reaching social effect equally.
Small-sized fan is from the majority between several hectowatts to ten kilowatt, as the induction machine of fan motor, power is more little, and its power factor and efficient are also just low more, even therefore the blower fan to this power range adopts frequency control way to carry out the adjusting of air quantity, its energy-saving effect also is restricted.Permanent-magnet brushless DC electric machine need not current excitation, and rotor does not have iron loss, therefore compares with induction machine to have higher power factor and efficient, and power of motor is more little, and the contrast superiority is big more.So small-sized fan adopts the permanent-magnet brushless DC electric machine driving to have than the more obvious energy-saving effect of induction machine, has very big potentiality.
Small-sized fan adopts permanent-magnet brushless DC electric machine frequency control of motor speed far above induction machine on energy-saving effect, and the cost that therefore how to reduce permanent-magnet brushless DC electric machine and drive system thereof becomes it in this scope inner blower key in application.In fact, the control of permanent-magnet brushless DC electric machine is simple more than Control of Induction Motors, its controller cost also only can be lower than the Control of Induction Motors device, although but the permanent-magnet brushless DC electric machine that adopts high-performance rare-earth permanent magnet material can obtain the specific power than induction machine high 30%, but because expensive magnet material, make that the cost of permanent-magnet brushless DC electric machine itself is more than 2 times of induction machine, this has limited the application of permanent-magnet brushless DC electric machine on small-power rate range blower fan undoubtedly.
Summary of the invention
The purpose of this utility model is to provide a kind of external rotor permanent magnet brshless DC motor speed governing centrifugal blower, the efficient height, and power is big, and energy consumption is low.
External rotor permanent magnet brshless DC motor speed governing centrifugal blower described in the utility model, comprise brushless, permanently excited direct current motor and PWM inverter, the input end of PWM inverter connects power supply, the output terminal of PWM inverter connects brushless, permanently excited direct current motor, it is characterized in that being provided with control circuit and sensor, the sensor output terminal connects the input end of control circuit, and the output terminal of control circuit connects the control end of PWM inverter.
Wherein, sensor is a rotor-position sensor; be installed on the rotor, control circuit comprises rotor-position sensor decoder circuit, the internal reference power supply of band temperature correction, saw-toothed oscillator, error amplifier, pulsewidth modulation (PWM) comparator, output driving circuit and the protection fault output circuit that frequency can be set.
The utility model is the combination utilization to the custom circuit unit, and each several part is the custom circuit unit, connects to use according to conventional connection mode to get final product.
The utility model is by setting up control circuit and sensor, the sensor output terminal connects the input end of control circuit, the output terminal of control circuit connects the control end of PWM inverter, regulates air quantity, blast by the control fan speed regulation, than adopting regulating valve to transfer air quantity, blast, power savings is good, efficient height, power are big, compare with common electric machine driving type centrifugal blower, and cost reduces by 50%, efficient improves 3～5%, economize on electricity 20%.
Description of drawings
Fig. 1, control principle figure of the present utility model.
Embodiment
Below in conjunction with embodiment's accompanying drawing the utility model is further described.
As shown in the figure, the input end of PWM inverter connects power supply, and the output terminals A of PWM inverter, B, C connect staor winding a, b, the c of ventilator, and the sensor output terminal connects the input end of control circuit, and the output terminal of control circuit connects the control end of PWM inverter.
Ventilator adopts the external rotor permanent magnet brshless DC motor.
Control circuit adopts the circuit of being made up of the internal reference power supply of rotor-position sensor decoder circuit, band temperature correction, conventional modules such as saw-toothed oscillator, error amplifier, pulsewidth modulation (PWM) comparator, output driving circuit and protection fault output circuit that frequency can be set.
The mode of connection of control circuit and blower fan:
The external rotor permanent magnet brushless direct current motor has three phase mains wiring and six electronic commutator wiring.In the rich group of the stator of motor groove, uniformly be fixed with three electronic commutators---Hall element, and rely on this electronic commutator that direct current (d.c.) is converted to square-wave current to be input in the stator polyphase windings.Brushless, permanently excited direct current motor is by being installed on the position transducer detection rotor position of magnetic pole of stator side, and order makes motor produce the electromagnetic torque that continues to the motor stator winding energising.For making motor have optimal ride quality, phase current in the motor windings must satisfy certain relation with electromotive force mutually, be that electric current is the square wave of 120 ° of width, after continuing 120 ° of electrical angles, 60 ° cut-off region is arranged, the 120 ° of square-wave currents of switching in the other direction then, the phase electromotive force should be the trapezoidal wave that flat-top width surpasses 120 °, and the electric current of a certain phase and electromotive force should be cophasing, only in this way could guarantee that motor has maximum average electromagnetic torque and minimum ripple torque, and ripple torque and cogging torque are the main sources that produces motor oscillating and noise.
The typical case of this control circuit controls that function comprises PWM open loop speed controlling, enables control (start or stop), clockwise and anticlockwise control and dynamic braking control, suitably adds some peripheral cells, can realize soft start.
This control circuit drives to export and divides two-part up and down, and three are gone up side drive output suction current capacity is 50mA, and withstand voltage is 40V, can be used to drive the npn power transistor and the P channel mosfet power tube of brachium pontis on the external inverter bridge.Three following side drive outputs are to recommend output, and current capacity is 100mA, directly driving N PN transistor and N channel power MOS FET.Three downside drive output signal are pulsewidth modulation (PWM) signal, and three upside drive signals are non-pwm signal.When driven, drive signal respectively has one output is arranged up and down, therefore as long as change the pulse width of downside drive signal, just has been equivalent to change and has supplied with the average voltage of motor winding, thereby controlled its torque and rotating speed.
Claims (2)
1, a kind of external rotor permanent magnet brshless DC motor speed governing centrifugal blower, comprise brushless, permanently excited direct current motor and PWM inverter, the input end of PWM inverter connects power supply, the output terminal of PWM inverter connects brushless, permanently excited direct current motor, it is characterized in that being provided with control circuit and sensor, the sensor output terminal connects the input end of control circuit, and the output terminal of control circuit connects the control end of PWM inverter.
2, external rotor permanent magnet brshless DC motor speed governing centrifugal blower according to claim 1; it is characterized in that sensor is a rotor-position sensor; be installed on the rotor, control circuit comprises rotor-position sensor decoder circuit, the internal reference power supply of band temperature correction, saw-toothed oscillator, error amplifier, pulsewidth modulation (PWM) comparator, output driving circuit and the protection fault output circuit that frequency can be set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200859618U CN2921380Y (en) | 2006-06-20 | 2006-06-20 | External rotor permanent magnetic brushless DC electric machine speed regulating centrifugal ventilator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200859618U CN2921380Y (en) | 2006-06-20 | 2006-06-20 | External rotor permanent magnetic brushless DC electric machine speed regulating centrifugal ventilator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2921380Y true CN2921380Y (en) | 2007-07-11 |
Family
ID=38253859
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006200859618U Expired - Fee Related CN2921380Y (en) | 2006-06-20 | 2006-06-20 | External rotor permanent magnetic brushless DC electric machine speed regulating centrifugal ventilator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2921380Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016378A (en) * | 2012-11-30 | 2013-04-03 | 杭州顿力电器有限公司 | Driving circuit and driving method of external rotor electronic control type fan adjuster |
| CN106787551A (en) * | 2017-03-10 | 2017-05-31 | 江苏智马机电科技有限公司 | A kind of alternating current impression servo high-speed motor |
-
2006
- 2006-06-20 CN CNU2006200859618U patent/CN2921380Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016378A (en) * | 2012-11-30 | 2013-04-03 | 杭州顿力电器有限公司 | Driving circuit and driving method of external rotor electronic control type fan adjuster |
| CN103016378B (en) * | 2012-11-30 | 2015-07-08 | 杭州顿力电器有限公司 | Driving circuit and driving method of external rotor electronic control type fan adjuster |
| CN106787551A (en) * | 2017-03-10 | 2017-05-31 | 江苏智马机电科技有限公司 | A kind of alternating current impression servo high-speed motor |
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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 |
Granted publication date: 20070711 Termination date: 20140620 |
|
| EXPY | Termination of patent right or utility model |