CN2128801Y - Stepless speed regulating squirrel-cage motor - Google Patents
Stepless speed regulating squirrel-cage motor Download PDFInfo
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- CN2128801Y CN2128801Y CN 92234989 CN92234989U CN2128801Y CN 2128801 Y CN2128801 Y CN 2128801Y CN 92234989 CN92234989 CN 92234989 CN 92234989 U CN92234989 U CN 92234989U CN 2128801 Y CN2128801 Y CN 2128801Y
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- 241000555745 Sciuridae Species 0.000 abstract 1
- 230000006698 induction Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
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- 230000005540 biological transmission Effects 0.000 description 2
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- 238000010168 coupling process Methods 0.000 description 2
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- 238000005272 metallurgy Methods 0.000 description 2
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- 239000003990 capacitor Substances 0.000 description 1
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Abstract
The utility model discloses a stepless speed regulating squirrel-cage motor, comprising a motor casing, a main stator, an auxiliary stator, a squirrel-cage rotor and an electric device. The main stator and the auxiliary stator are both pressing-mounted in the same motor casing and share one squirrel cage rotor, the main stator is provided with a main winding and a feedback winding, the auxiliary stator is provided with a feedback winding, the feedback winding and the feedback winding are connected via the electrical device. The utility model has the advantages of simple structure, low cost, high efficiency, shock resistance and convenient control, and has the characteristics of soft starting, point action, loading shutting-down and braking, etc.; besides, the range of the stepless speed regulating of the utility model can be from zero to the rated rotation speed.
Description
The utility model relates to the stepless speed regulation interconnected cage motor in the induction motor speed adjusting technique field, can be widely used in the speed governing occasion of equipment such as metallurgy, chemical industry, weaving, water pump, blower fan, compressor, elevator.
Present induction motor speed governing, majority are to adopt wound rotor motor.Because the wound-rotor motor complex structure has slip ring, brush, is prone to spark during running, grind the brush powder of conduction in addition, not only increase the rate of failure of motor, but also increased maintaining work and expense, also limited its scope of application.Tandem control and rotor series resistance speed are used in wound-rotor motor speed governing in the past usually.Tandem control can realize stepless speed regulation, and is higher in the speed adjustable range internal efficiency, but if speed adjustable range is big, then the converter capacity is big, price is very expensive, and only is applicable to blower fan, the load of the pumps of big-and-middle capacity, and the scope of application is very limited, cascade speed regulator needs a series of links such as rectification, inversion, regulation and control, filtering, compensation simultaneously, adopted a large amount of semiconductor device, complex structure, cost height, poor reliability is bigger to harmonic pollution in electric power net; Rotor series resistance speed has the reliability height, small investment is safeguarded simply the advantage that power factor is high, be applicable to blower fan, load of the pumps that 15kw is above, range of capacity is big than tandem control, however rotor series resistance speed when rotating speed descends, efficient decreases, and adjusting speed accuracy is relatively poor, continuous speed adjustment needs the water resistance adjusting device, and both inconvenient, the scope of application is very limited again.
The purpose of this utility model just provides a kind of novel stepless speed regulation interconnected cage motor, it has overcome the shortcoming of the motor of Wound-rotor type tandem control in the past, brushless, no-spark, its structure and electric device are all very simple, can suppress harmonic pollution effectively, the power factor of raising system, the purpose of realization stepless speed regulation.
The purpose of this utility model is achieved in that novel stepless speed regulation interconnected cage motor is by motor casing, main stator, secondary stator, cage rotor and electric device constitute, main, secondary stator press-loading is in same motor casing, they are totally one cage rotor, wherein on the main stator except that main winding is arranged, also have a cover three-phase symmetric winding to be called the feedback winding, the feedback winding can be an independent winding, also can be connected into autocoupling type with main winding, and have only a cover winding to be called the feed winding on the secondary stator, between the feed winding on the feedback winding on the main stator and the secondary stator by being electrically connected.
When motor rotation, main, secondary stator air-gap rotating magnetic field all can be responded to the slip frequency electromotive force in total cage rotor, if change the size and the phase place of secondary stator air-gap rotating magnetic field, just can change the synthetic electromotive force of total cage rotor two induced potentials, can regulate the rotating speed of motor, therefore between the feed winding on the feedback winding on the main stator and the secondary stator, add an electric device (promptly being electrically connected), can change the size and Orientation of secondary stator feed winding input voltage by the adjustment of electric device, and then change the size and the phase place of secondary stator air-gap rotating magnetic field, the purpose that realizes regulating motor speed.The method of employing machinery changes the space electrical degree between main stator and the secondary stator, can reach the effect of regulating motor speed equally.
This novel stepless speed regulation interconnected cage motor is owing to adopted the master of two band windings, secondary stator is the structure of totally one cage rotor, and a cover main winding and a cover feedback winding are arranged on the main stator, one cover feed winding is arranged on the secondary stator, the feedback winding is connected with electric device with the feed winding, by adjusting size and the phase place that electric device changes secondary stator air-gap rotating magnetic field, regulate the rotating speed of motor, thereby it is simple and reliable for structure, motor cost is lower, can realize zero to the interior stepless speed regulation of rated speed scope, its power bracket can be from 10kw～1000kw, has soft start, crawl, band carries characteristics such as parking and braking, efficient and power factor are higher, anti-interference stronger with the shock resistance load capacity, little to the harmonic pollution of electrical network, control very convenient, can be widely used in metallurgy, chemical industry, weaving, water pump, blower fan, compressor, the speed governing occasion of equipment such as elevator has powerful vitality in the range of capacity of broadness.
Concrete structure of the present utility model is provided by following embodiment and accompanying drawing thereof.
Fig. 1 is the bulk junction composition according to the novel stepless speed regulation interconnected cage motor that the utility model proposes.
Fig. 2 is the structure principle chart according to the novel stepless speed regulation interconnected cage motor that the utility model proposes.
Fig. 3 differs 180 ° of vectograms under the electrical degree particular case according to novel stepless speed regulation interconnected cage motor main stator and the secondary stator rotating magnetic field that the utility model proposes.
Describe the details and the working condition of the concrete device that proposes according to the present invention in detail below in conjunction with accompanying drawing.
Novel stepless speed regulation interconnected cage motor is made of motor casing, main stator, secondary stator, cage rotor and electric device.Main stator (2) and secondary stator (5) are fitted in the same motor casing (1), they are totally one cage rotor (3), wherein on the main stator except that main winding (6) is arranged, also have a cover three-phase symmetric winding to be called feedback winding (7), have a cover winding to be called feed winding (8) on the secondary stator, the feedback winding on the main stator is connected by electric device (4) with feed winding on the secondary stator.
As everyone knows, motor in the running, major and minor stator air-gap rotating magnetic field all can produce induction slip frequency electromotive force in total cage rotor, if change the size and the phase place of secondary stator air-gap rotating magnetic field, then can change the synthetic electromotive force of total cage rotor two induced potentials, can regulate the rotating speed of motor.So between feedback winding on the main stator and the feed winding on the secondary stator, add an electric device, can change the size and Orientation of secondary stator feed winding input voltage by the adjustment of electric device, thereby change the size and the phase place of secondary stator air-gap rotating magnetic field, realize regulating the purpose of motor speed.
In novel stepless speed regulation interconnected cage motor of the present utility model, after main winding is connected three-phase symmetrical power, in the main stator air gap, produced rotating magnetic field φ
Main, in main winding, feedback winding and cage rotor, responded to electromotive force respectively
I master,
The I feedbackAnd S
H master,, then in secondary stator air gap, also produced rotating magnetic field φ because the feed winding on feedback winding and the secondary stator on the main stator has electric being connected through electric device
Secondary, cut feed winding and cage rotor respectively and inducted
The I feedAnd S
The H pair, then in total cage rotor
I
2＝
＝
ψ
2＝tg
－1(SX
2)/(r
2)
Differ 180 ° of vectograms under the electrical degree particular case by main stator and secondary stator rotating magnetic field and also can find out this point (see figure 3).
This shows, change
The H pairJust can change S and
2
When S=0, then
2=0, so the rotating speed of this adjustable-speed motor can not surpass synchronous speed.
When
H master+
The H pair=0 o'clock, then
2=0, this moment, motor speed was zero.
We can know according to Principle of Electric Engine: the electromagnetic power of main stator air gap transmission equals I
2E
H masterCOS ψ (
H master,
2), and the electromagnetic power of secondary stator air gap transmission should be I mutually
2E
The H pairCOS φ (
The H pair,
2).If I
2E
The H pairCOS φ (
The H pair,
2) be on the occasion of, then secondary stationary part is in motoring; When being negative value, then be operation state of generator, come down to this moment the slip power of main stator part is feedbacked by secondary stator air-gap rotating magnetic field.
Therefore, this novel stepless speed regulation interconnected cage motor not only can realize zero to the interior stepless speed regulation of rated speed scope, and has higher efficient and power factor, and stronger anti-interference, shock resistance load capacity are to characteristics such as harmonic pollution in electric power net are little.
In the middle of actual production, main winding on this stepless speed regulation interconnected cage motor main stator and feedback winding adopt two cover independent winding schemes, and be more suitable to high pressure (6KV or 10KV) motor.Because in this case, feedback winding on the main stator and the feed winding on the secondary stator, can adopt low-voltage (generally below 0.5KV) winding construction and insulation system, can reduce the manufacturing cost and the complex process degree of motor, also can reduce the cost of the electric device that changes feed winding input voltage size or phase place, improve the reliability of adjustable-speed motor.
For low pressure stepless speed regulation interconnected cage motor, the main winding of main stator and feedback winding also can adopt the self coupling mode, even in the end of incoming cables tap, i.e. two cover windings (see figure 4)s that unite two into one, like this can simplified structure, improve stock utilization, reduce the motor manufacturing cost.
Between the feedback winding and the feed winding on the secondary stator on the main stator, be used to change the electric device of feed winding input voltage size and phase place, can adopt moving coil voltage regulator, induction voltage regulator, phase shifter, self coupling tapped transformer, E-communication voltage regulator, various reactance, resistance grouping circuits ... Deng, realize the stepless or step speed regulation of motor.Also can use mechanical device, as: worm and gear ... Deng, change the space electrical degree of the feed winding on the secondary stator, realize the stepless speed regulation of motor.
In addition, because the reactive power of main stator, secondary stator and electric device is all taken from electrical network, we can between feedback winding on input or the main stator and the feed winding on the secondary stator and on building-out capacitor, to improve the power factor of this stepless speed regulation interconnected cage motor.
Claims (5)
1, a kind of novel stepless speed regulation interconnected cage motor, be to constitute by motor casing, main stator, secondary stator, cage rotor and electric device, it is characterized in that: main stator (2) and secondary stator (5) are fitted in the same motor casing (1), they are totally one cage rotor (3), wherein on the main stator except that main winding (6) is arranged, also have a cover three-phase symmetric winding to be called feedback winding (7), have a cover winding to be called feed winding (8) on the secondary stator, the feedback winding on the main stator is connected by electric device (4) with feed winding on the secondary stator.
2, novel stepless speed regulation interconnected cage motor according to claim 1 is characterized in that: for high pressure stepless speed regulation interconnected cage motor, main winding on the main stator and feedback winding are two cover independent winding.
3, novel stepless speed regulation interconnected cage motor according to claim 1 is characterized in that: for low pressure stepless speed regulation interconnected cage motor, main winding on the main stator and feedback winding are connected into autocoupling type.
4, novel stepless speed regulation interconnected cage motor according to claim 1 is characterized in that: shunt compensation electric capacity between feedback winding on input or the main stator and the feed winding on the secondary stator.
5, novel stepless speed regulation interconnected cage motor according to claim 1 is characterized in that: be connected by mechanical device between the feed winding on the feedback winding on the main stator and the secondary stator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92234989 CN2128801Y (en) | 1992-10-09 | 1992-10-09 | Stepless speed regulating squirrel-cage motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92234989 CN2128801Y (en) | 1992-10-09 | 1992-10-09 | Stepless speed regulating squirrel-cage motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2128801Y true CN2128801Y (en) | 1993-03-24 |
Family
ID=33776883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92234989 Expired - Fee Related CN2128801Y (en) | 1992-10-09 | 1992-10-09 | Stepless speed regulating squirrel-cage motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2128801Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105553206A (en) * | 2016-02-18 | 2016-05-04 | 珠海格力节能环保制冷技术研究中心有限公司 | Sectionalized stator group, motor and compressor |
| CN111030549A (en) * | 2020-01-08 | 2020-04-17 | 克拉玛依市博瑞科技发展有限公司 | Permanent magnet motor dragging reactive feedback integrated device |
-
1992
- 1992-10-09 CN CN 92234989 patent/CN2128801Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105553206A (en) * | 2016-02-18 | 2016-05-04 | 珠海格力节能环保制冷技术研究中心有限公司 | Sectionalized stator group, motor and compressor |
| CN111030549A (en) * | 2020-01-08 | 2020-04-17 | 克拉玛依市博瑞科技发展有限公司 | Permanent magnet motor dragging reactive feedback integrated device |
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| CP01 | Change in the name or title of a patent holder |
Patentee after: Changcheng Electronics and Machinery Science-Technology Industrial Co., Beijing Patentee before: Shen Taifu |
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| C53 | Correction of patent for invention or patent application | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: PATENTEE; FROM: BEIJING CHANGCHENG ELECTROMECHANICAL SCIENCE AND TECHNOLOGY INDUSTRY COMPANY TO: CHINA AETNA ECONOMIC DEVELOPMENT CO., LTD. |
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| CP03 | Change of name, title or address |
Address after: 100038, Fuxing Road, Beijing, No. 9 Patentee after: Aetna China Economic Development Corporation Address before: Beijing city Chaoyang District East Third Ring Road No. 2 building Patentee before: Changcheng Electronics and Machinery Science-Technology Industrial Co., Beijing |
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Addressee: Aetna Economic Development Corporation Document name: Notice of termination |
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| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |