CN202111601U - Voltage-and-speed-variable mono-phase asynchronous motor for fans - Google Patents
Voltage-and-speed-variable mono-phase asynchronous motor for fans Download PDFInfo
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- CN202111601U CN202111601U CN2011202429371U CN201120242937U CN202111601U CN 202111601 U CN202111601 U CN 202111601U CN 2011202429371 U CN2011202429371 U CN 2011202429371U CN 201120242937 U CN201120242937 U CN 201120242937U CN 202111601 U CN202111601 U CN 202111601U
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Abstract
The utility model provides a voltage-and-speed-variable mono-phase asynchronous motor for fans, which comprises a voltage regulating device and a mono-phase asynchronous motor, wherein the voltage regulating device is used for supplying power sources with variable voltage for the motor, and the mono-phase asynchronous motor outputs corresponding power according to voltage provided by the voltage regulating device. Speed governing and voltage regulating of the mono-phase asynchronous motor are realized and are simple in paths and easy to be controlled automatically. Heat of rotation difference power is consumed in a rotor resistor during voltage regulation, and efficiency is lower. The speed governing and the voltage regulation are generally suitable for production machinery with the power lower than 100KW, and when the rotation speed of a fan is reduced, air quantity is reduced, power of the motor is reduced by cubic. When only small air quantity is required, the rotation speed of the fan is reduced by regulating the voltage, so that output power of the motor is correspondingly reduced. When the air quantity is reduced by 80%, the rotation speed is reduced by 80% as well, and the shaft power is reduced to 51.2% of the nominal power. While the air quantity is reduced by 40%, the shaft power is reduced to 6.4% of the nominal power.
Description
Technical field
But the utility model relates to a kind of fan-type variable voltage control monopole asynchronous motor, belongs to variable voltage control motor technology field.
Background technology
Along with the develop rapidly of power electronic technology and control technology, the novel electric power electric components and parts continue to bring out, and converter technique obtains fast development, makes the AC speed regulating performance to compare favourably with DC speed regulation.Variable voltage control is the speed governing that realizes asynchronous motor with the method that changes stator voltage, changes the mechanical property that stator voltage just can change motor, and being complementary with a certain load characteristic just can be stabilized on the different rotating speed, thereby realizes speed-regulating function.And the particularity of fan-type load just in time can adapt to this characteristic, so variable voltage control is used more extensive in fields such as the little centrifugal fan water pump of family expenses fan, electric tool, capacity, elevator, textile machine, handling machineries.
Owing to receive the influence of region, in many outlying places or area, mountain area, three phase mains can't get into.And single phase poaer supply can go deep into because cost is low.Therefore the scope of application of monopole asynchronous motor is bigger.But existing monopole asynchronous motor can't be realized variable voltage control.
Summary of the invention
The purpose of the utility model is can't realize the problem of variable voltage control in order to solve existing monopole asynchronous motor, but and then a kind of fan-type variable voltage control monopole asynchronous motor is provided.
The purpose of the utility model realizes through following technical scheme:
The utility model comprises: regulator is used for providing to motor the power supply of change in voltage; Monopole asynchronous motor is exported corresponding power according to the voltage that regulator provides.
The utility model has been realized the variable voltage control of monopole asynchronous motor, and the variable voltage control route is simple, is prone to realize control automatically; Slip power heating form consumes in rotor resistance in the pressure regulation process, and efficient is lower; Variable voltage control generally is applicable to the manufacturing machine below the 100KW.
Because the torque of motor is directly proportional with voltage squared, therefore after reducing voltage, the motor breakdown torque can descend a lot.And under the effect of blast, the blower fan meeting reduces rotating speed automatically, and blast also can obviously descend simultaneously, that is to say that the axle of motor goes out the power reduction.Handle stability each other.
Under fan-type loading condition, the electric current of motor rotor has maximum.And for constant torque load, voltage reduces, and operation torque meeting descends, and certainly will increase revolutional slip.Cause stator, rotor current to increase, operation causes motor overheating when long.So variable voltage control is suitable for sub fan-type load very much.
When the rotation speed of fan reduction, air quantity reduces, and power of motor becomes a cube ratio to descend.When the little air quantity of needs, reduce rotation speed of fan with voltage regulating mode, the power output of its motor also reduces accordingly.Reduce to 80% like air quantity, rotating speed also drops to 80%, and its shaft power drops to 51.2% of rated power; If air quantity reduces to 40%, shaft power will drop to 6.4% of rated power.
Description of drawings
But the structural representation of a kind of fan-type variable voltage control monopole asynchronous motor that Fig. 1 is the utility model execution mode to be provided.
Embodiment
To combine accompanying drawing that the utility model is done further detailed description below: present embodiment provided detailed execution mode, but the protection range of the utility model is not limited to following embodiment being to implement under the prerequisite with the utility model technical scheme.
As shown in Figure 1, but the related a kind of fan-type variable voltage control monopole asynchronous motor of present embodiment comprises regulator 1, is used for providing to motor the power supply of change in voltage; Monopole asynchronous motor 2 is exported 3 actings of corresponding power drive blower fan according to the voltage that regulator provides.
Said regulator is series transductor, autotransformer or thyristor.
Preferable regulator is a thyristor.
Motor adds the installation of flat key formula with adopting common axis hole connecting of blower fan, adopts nut to compress method outward, and the hand of spiral of nut is opposite with the direction of rotation of fan blade, has both guaranteed operating reliability, has played fixing effect again.Technology is simple, convenient and practical, safe and reliable.
Whole blower fan fixedly be to realize through the ring flange of motor.Adopt the mounting structure of common electric machine, can realize that the accessory of common electric machine, frock clamp are general.Realize that cost is low, international purpose is installed.
The above; Be merely the preferable embodiment of the utility model; These embodiments all are based on the different implementations under the utility model general idea, and the protection range of the utility model is not limited thereto, and any technical staff who is familiar with the present technique field is in the technical scope that the utility model discloses; The variation that can expect easily or replacement all should be encompassed within the protection range of the utility model.Therefore, the protection range of the utility model should be as the criterion with the protection range of claims.
Claims (3)
1. but a fan-type variable voltage control monopole asynchronous motor is characterized in that, comprising: regulator is used for providing to motor the power supply of change in voltage;
Monopole asynchronous motor is exported corresponding power according to the voltage that regulator provides.
2. but fan-type variable voltage control monopole asynchronous motor according to claim 1 is characterized in that said regulator is series transductor, autotransformer or thyristor.
3. but fan-type variable voltage control monopole asynchronous motor according to claim 2 is characterized in that said regulator is a thyristor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202429371U CN202111601U (en) | 2011-07-12 | 2011-07-12 | Voltage-and-speed-variable mono-phase asynchronous motor for fans |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202429371U CN202111601U (en) | 2011-07-12 | 2011-07-12 | Voltage-and-speed-variable mono-phase asynchronous motor for fans |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202111601U true CN202111601U (en) | 2012-01-11 |
Family
ID=45437049
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202429371U Expired - Lifetime CN202111601U (en) | 2011-07-12 | 2011-07-12 | Voltage-and-speed-variable mono-phase asynchronous motor for fans |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202111601U (en) |
-
2011
- 2011-07-12 CN CN2011202429371U patent/CN202111601U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120111 |
|
| CX01 | Expiry of patent term |