CN86106631A - Alternating stepless speed regulating machine - Google Patents
Alternating stepless speed regulating machine Download PDFInfo
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- CN86106631A CN86106631A CN 86106631 CN86106631A CN86106631A CN 86106631 A CN86106631 A CN 86106631A CN 86106631 CN86106631 CN 86106631 CN 86106631 A CN86106631 A CN 86106631A CN 86106631 A CN86106631 A CN 86106631A
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- casing
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- phase modulation
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Abstract
A kind of alternating stepless speed regulating machine, particularly to the speed governing of cage rotor asynchronous machine, it has solved the problem that at present general non-frequency method exists the stepless speed regulation of cage rotor asynchronous machine.This motor has two groups of stator winding that are axially-aligned, and can relatively rotate by casing, one rotor is through the central authorities of these two groups of cylindrical spaces that stator winding contained, as long as regulate the phase angle of the rotating magnetic field of two stator winding, just can regulate the rotating speed of rotor, the method of regulating this phase angle is, one passes the circumferential relative position that mechanism regulates stator winding by machinery, the 2nd, on the incoming line of stator winding, connect phase modulation electrical equipment.
Description
The present invention relates to a kind of alternating stepless speed regulating machine, particularly to the speed governing of cage rotor asynchronous machine.
It is comparatively complicated at present the cage rotor asynchronous machine to be carried out the mode of stepless speed regulation, and equipment price is also expensive.It is generally acknowledged that comparatively easy mode is, reach the purpose of speed governing by the voltage of regulating stator winding.This buncher is made up of casing, stator winding, rotor, bearing, end cap and regulator, its stator winding is assemblied in the inboard of casing, rotor places the central authorities of the cylindrical space that stator winding contains, it is supported at both ends on the bearing that is assemblied in the end cap, and a regulator is connected on the stator winding incoming line.The problem that this adjusting velocity by voltage method exists is, efficient during speed governing is low, power factor (PF) is low, the power that is consumed in rotor circuit when low speed is bigger, so economy is not high, it is serious that simultaneously the motor feels hot, and therefore this speed regulating method often is confined to the programme of cage asynchronous motor of high-slip, if be used in common cage rotor asynchronous machine then must underrun or short-term operation when low speed.
Task of the present invention is to design a kind of like this alternating stepless speed regulating machine, the efficient height of speed governing, and power factor (PF) is higher; During low cruise, power factor (PF) can be compensated, and is energy-conservation, and low-speed characteristic is good; Electric machine structure is constant substantially, can utilize original technology and equipment to produce, and whole motor is cheap.
This task has been solved by the following characteristics technology, motor case is made up of two parts, wherein a part of casing can rotate relative to another part casing, in this two parts casing inboard one group of stator winding is housed respectively, and a rotor is through the central authorities of these two groups of cylindrical spaces that stator winding contained.Epitrochanterian induced potential is to close electromotive force, be the induced potential that on rotor, produces of the rotating magnetic field by two groups of each self-formings of stator winding vector and.This closes the phase angle that electromotive force is decided by the induced potential that produces on each comfortable rotor of rotating magnetic field of two groups of stator winding, just can change this phase angle as long as regulate phase modulation apparatus, thereby just can change the size of closing electromotive force, and the variation of closing the electromotive force size will cause the variation of rotor speed speed, so just can reach the purpose of stepless speed regulation.
Feature of the present invention, details and advantage will be set forth by means of drawings and Examples, and go through, and should not be interpreted as the embodiment that this is limited to invention certainly.
Fig. 1. the axial section of alternating stepless speed regulating machine
Fig. 2.
Resultant vector composite diagram with phase time
Fig. 3.
Vector composite diagram when phase angle is ψ
Fig. 4.
Resultant vector composite diagram when anti-phase
Fig. 5. regulate
Phase angle the time polar plot
Fig. 6. regulate
Phase angle and the polar plot a during amplitude wherein
Embodiment 1:
What Fig. 1 represented is the structure of whole alternating stepless speed regulating machine, casing (1) radially is divided into two parts, casing (1 ') and casing (1 "); side respectively is equipped with one group of stator winding (2) within it; two groups of stator winding (2) are axially-aligned; these two groups of stator winding are separate; the connected mode of they and power supply is identical; on the periphery of an end (7) of casing (1 ') rectangular channel (8) is arranged, on the periphery of one end (9) of casing (1 ') gear ring (11) is arranged, supporting at casing (in the hole of an end (9) of 1 "); pin (12) is inserted in pin-and-hole (10) and the groove (8); (axially relatively moving of 1 "), (circumferentially rotate without restrictions by 1 ") relative to casing for casing (1 ') energy in case casing (1 ') and casing at an end (7) that is distributed with two footpath radius vector hole casings (1 ') on the circumference of gear ring (11) one sides.One cage rotor is positioned at the cylindrical space that two stator winding (2) are contained, and it is supported at both ends on the bearing (6) that is assemblied in the end cap (5).Said structure essence is equivalent to two general cage rotor asynchronous machine axially-aligned, remove the end cap of mutual applying end, these two ends are circumferentially coupled together without restrictions, the stator structure of the inside does not become, just cage rotor has extended, and this structure makes the present invention have a big advantage, can utilize original production equipment and technology to produce substantially, structure is also simple simultaneously, thereby cost is cheaper.
Induced potential on the cage rotor
2O is the induced potential that the rotating magnetic field of each self-forming of two groups of stator winding (2) produces on cage rotor
' 2With
" 2Vector and.
What Fig. 2-4 represented is
' 2With
" 2Phase angle α=0 °, φ, π the time close electromotive force E
2The synthetic situation of O.
α=0 o'clock, E
2O=E
' 2+ E
" 2=2E
' 2=2E
" 2
During α=φ, E
2O=2E
' 2COS (φ)/2=2E
" 2COS (φ)/2
During α=π, E
2O=E
' 2-E
' 2=0
Therefore as long as change the phase difference of two rotating magnetic fields, their induced potential on cage rotor
' 2With
" 2Between phase difference will change, thereby close electromotive force E
2O is just at 0～2E
' 2(or 0～2E
" 2) scope in change, close electromotive force E
2The change of O can cause the change of cage rotor rotating speed, can reach the purpose of stepless speed regulation with this.The method of this speed governing is when low speed, because revolutional slip S increases the power frequency f of rotor
2=f
1S increases (f
1Be the frequency of stator current, promptly supply frequency is changeless), induction reactance increases, thus rotor current I
2Lag behind more and close electromotive force
2O, but more near electromotive force
' 2, promptly with
' 2Phase angle
More little, thus power factor (PF) is high more, power output is big more, and Fig. 5 represents
' 2With
" 2With
2The polar plot of phase angle when being respectively φ and θ, the power output of rotor as can be seen from this polar plot
P
Output=E
' 2I
2COS θ
I
2At E
" 2Component on the direction is anti-phase, and at this moment to the power supply feedback power, α is more little, and feedback power is big more:
P
Feedback=E
2 "I
2COS α α＜(π)/2
So another big advantage of the present invention is: when low speed, power factor (PF) can be compensated, power output improves, and efficient height during speed governing is simultaneously owing to there is part to fail to change into the electric energy W=P of mechanical energy
FeedbackTo the power supply input power, therefore can realize energy-conservation.
The method that changes the phase difference of two rotating magnetic fields is: the circumferential relative position of 1) regulating two groups of stator winding (2), thereby can change the phase difference of current potential in two groups of stator winding or electric current, the phase difference of the rotating magnetic field that such two stator winding (2) produce separately is also just along with synchronous change, adjusting device be a mechanical driving device it be a Worm and worm-wheel gearing, rotary worm (13), worm gear (14) will rotate thereupon, the rotation of worm gear (14) can drive the rotation that is assemblied in the gear (15) on the same axle with it, gear (15) be and casing (gear ring (11) on 1 ") is intermeshing; (1 ") rotated relative to casing (1 '), and (the circumferential relative position of two groups of stator winding (2) that 1 ") is inboard changes thereby make casing (1 ') and casing so the rotation of gear (15) will drive casing.This rotating speed of regulating asynchronous machine by mechanical mode makes the present invention also have a big advantage, and Here it is can carry out stepless speed regulation to large-size machine.2) phase difference of the power supply between adjusting two stator winding (2), its method is that to connect this phase modulation apparatus of a phase modulation apparatus on the incoming line of stator winding (2) be an electrical equipment (16), can use pm motor when being used for, be used for low-power machine and can use phase modulation circuit than heavy-duty motor.
The described buncher of Fig. 6, its basic structure is identical with embodiment 1, and institute's difference is regulated simultaneously for two groups of stator winding of this machine (2) relative angle and the input voltage of a stator winding wherein, can obtain the optimum operation effect like this.Voltage-regulation adopts scr voltage regula-tor unit.
Need point out once more that invention is not limited to the details of said structure, mechanical driving device for example recited above is a kind of type of belt drive, also has other many type of belt drive.In addition, also useable electric moter drive realization remote control of this transmission.
Claims (11)
1, a kind of alternating stepless speed regulating machine, one group of stator winding (2) is equipped with in the inboard of casing (1), rotor (3) is positioned at the central authorities of the cylindrical space that stator winding (2) contained, it is supported at both ends on the bearing (6) that is assemblied in the two ends end cap (5), a regulator is connected on the incoming line of stator winding (2), feature of the present invention is that casing (1) radially is divided into two parts, casing (1 ') and casing (1 "); side is equipped with one group of stator winding (2) respectively within it; two parts casing circumferentially links together without restrictions by the end; rotor (3) is applied in the central authorities of two groups of stator winding (2), and a phase modulation apparatus places the outside of casing (1).
2, motor according to claim 1 is characterized in that, two groups of stator winding (2) are separate, and the mode of connection of itself and power supply is identical.
3, according to claim 1 and 2 described motors, it is characterized in that on the periphery of an end (7) of casing (1) rectangular channel (8) being arranged.
According to claim 1 and 2 described motors, it is characterized in that 4, casing (has a gear ring (11) on the periphery of an end (9) of 1 "), circumferentially is distributed with more than one radially pin-and-hole (10) on one side edge.
According to the described motor of claim 1 to 4, it is characterized in that 5, an end (7) of casing (1 ') circumferentially supporting without restrictions is at casing (in the hole of 1 ") end (9).
According to the described motor of claim 1 to 5, it is characterized in that 6, pin (12) is inserted in pin-and-hole (10) and the groove (8).
7, motor according to claim 1 is characterized in that, phase modulation apparatus is that (1 ") relatively rotates the mechanical transmission mechanism of angle to a control machine shell (1 ') with casing.
According to the described motor of claim 1 to 7, it is characterized in that 8, mechanical transmission mechanism is by worm screw (13), worm gear (14) and coaxial and form with gear ring (11) meshed gears (15) with worm gear (14).
9, motor according to claim 1 is characterized in that, phase modulation apparatus is an electrical equipment (16).
According to claim 1 and 9 described motors, it is characterized in that 10, electrical equipment (16) is a pm motor.
According to claim 1 and 9 described motors, it is characterized in that 11, electrical equipment (16) is a phase modulation circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86106631 CN86106631A (en) | 1986-09-26 | 1986-09-26 | Alternating stepless speed regulating machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86106631 CN86106631A (en) | 1986-09-26 | 1986-09-26 | Alternating stepless speed regulating machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN86106631A true CN86106631A (en) | 1988-04-06 |
Family
ID=4803289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 86106631 Pending CN86106631A (en) | 1986-09-26 | 1986-09-26 | Alternating stepless speed regulating machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN86106631A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101056029B (en) * | 2006-03-09 | 2011-05-25 | 三菱电机株式会社 | Electric rotating machine |
-
1986
- 1986-09-26 CN CN 86106631 patent/CN86106631A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101056029B (en) * | 2006-03-09 | 2011-05-25 | 三菱电机株式会社 | Electric rotating machine |
| US7990008B2 (en) | 2006-03-09 | 2011-08-02 | Mitsubishi Electric Corporation | Electric rotating machine having detachable moving stator drive unit |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |