CN204013145U - Induction machine - Google Patents
Induction machine Download PDFInfo
- Publication number
- CN204013145U CN204013145U CN201420381629.0U CN201420381629U CN204013145U CN 204013145 U CN204013145 U CN 204013145U CN 201420381629 U CN201420381629 U CN 201420381629U CN 204013145 U CN204013145 U CN 204013145U
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- stator
- rotor
- stator unit
- unit
- phase windings
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Abstract
The utility model discloses a kind of induction machine in technical field of motors, comprise housing, be coaxially arranged with stator and rotor in housing, stator is arranged on the periphery of rotor; Stator is along the circumferential direction divided into n section stator unit, n >=2 and be even number, and the arc length of every segment unit is not more than 2 π/n; Every section of stator unit equal intervals is distributed with three stator salient poles; In the stator salient poles of every section of stator unit, homogeneous one correspondence has installed around three phase windings; Each three phase windings are powered respectively through regulating circuit, and stator unit is symmetrically distributed in rotor shaft both sides, and three phase windings in stator unit are also symmetrically distributed.In three phase windings of each stator unit, pass into electric current by certain sequential, can drive rotor to rotate, on phase winding corresponding to symmetrical stator unit, pass into the electric current differing in size, can produce in the radial direction suspending power.The utility model can reduce or eliminate the radial load of rotor to bearing, the load of bearing is reduced, the life-span is long.
Description
Technical field
The utility model relates to a kind of motor, particularly a kind of induction machine.
Background technology
In prior art, threephase asynchronous can be divided into again two kinds of squirrel-cage and Wound-rotor types.The rotor winding of squirrel-cage asynchronous motor is gained the name because its shape resembles mouse cage, and its structure is that in embedding wire casing, copper bar is conductor, and the two ends of copper bar weld with short-circuited conducting sleeve.Middle-size and small-size squirrel-cage asynchronous motor adopts more cheap aluminium instead of copper, by cast solids such as rotor conductor, short-circuited conducting sleeve and fans, becomes cast-in aluminum squirrel cage formula rotor.The iron core of phase-wound rotor is identical with the iron core of cage rotor.Rotor winding is similar with stator winding, is to be formed by insulated conductor coiling, embeds according to certain rules in rotor composition three-phase symmetric winding.Conventionally the end of its three windings is linked togather, and head end joins with the copper slip ring that is fixed on three mutual insulatings in rotating shaft respectively, and is linked to be star-like.Rotor winding is connected with additional three-phase rheostat by slip ring and brush above thereof, the speed governing for motor starting and among a small circle.The operation principle of squirrel-cage and wound three-phase asynchronous motor is identical, and its difference is only the difference of rotor winding structure.
It on the stator of threephase asynchronous, is the inserted distributed winding of three-phase, motor adds after three-phase alternating current at stator winding, can form rotating magnetic field, the sliver of its epitrochanterian closure can induce electromotive force and electric current because of the magnetic line of force in cutting stator magnetic field, and charged conductor will produce motion in magnetic field, motor rotor has just rotated like this.
Its weak point is: current threephase asynchronous machine, and its radial load need to be born by bearing, cannot eliminate or reduce, and therefore, can cause bearing eccentric wear, has reduced bearing life, and its reliability is relatively poor.
Utility model content
The purpose of this utility model is to provide a kind of induction machine, can produce the power of resisting with radial force direction in inside, with balance radial force, reduces the wearing and tearing of bearing.
The purpose of this utility model is achieved in that a kind of induction machine, comprises housing, is coaxially arranged with stator and rotor in housing, and stator is arranged on the periphery of rotor; Stator is along the circumferential direction divided into n section stator unit, n >=2 and be even number, and the arc length of every segment unit is not more than 2 π/n; Every section of stator unit equal intervals is distributed with three stator salient poles; In the stator salient poles of every section of stator unit, homogeneous one correspondence has installed around three phase windings; Each three phase windings are powered respectively through regulating circuit, and stator unit is symmetrically distributed in rotor shaft both sides, and three phase windings in stator unit are also symmetrically distributed.
When the utility model work, in three phase windings of each stator unit, pass into electric current by certain sequential, can drive rotor forward or backwards rotation, on phase winding corresponding to symmetrical stator unit, pass into the electric current differing in size, suspending power can produced in the radial direction, resist the radial load of rotor, reach the object of the radial load of balancing rotor.Compared with prior art, the utility model can reduce or eliminate the radial load of rotor to bearing, and the load of bearing is reduced, and reaches the object that delays bearing life.
As further improvement of the utility model, described rotor is cage rotor, can be also phase-wound rotor.It is simple in structure, reliable operation.
Brief description of the drawings
Fig. 1 is the utility model structural representation.
Fig. 2 is fundamental diagram of the present utility model.
Wherein, 1 stator unit, 2 stator salient poles, 3 three phase windings, 4 rotors.
Embodiment
As shown in the figure, for a kind of induction machine, comprise housing, be coaxially arranged with stator and rotor 4 in housing, stator is arranged on the periphery of rotor 4; Stator is along the circumferential direction divided into n section stator unit 1, n >=2 and be even number, and the arc length of every section of stator unit 1 is not more than 2 π/n; Every section of stator unit 1 equal intervals is distributed with three stator salient poles 2; In the stator salient poles 2 of every section of stator unit 1, homogeneous one correspondence has installed around three phase windings 3; Each three phase windings 3 are powered respectively through regulating circuit, and stator unit 1 is symmetrically distributed in the rotating shaft both sides of rotor 4, and three phase windings in stator unit 1 are also symmetrically distributed, i.e. A in Fig. 1 and A1 symmetry, B and B1 symmetry, C and C1 symmetry.Rotor 4 can be cage rotor, can be also phase-wound rotor.
When this induction machine work, can enter shown in Fig. 2, its Principle of Rotating is: three phase windings are circuit parts of stator, be coiled into by some coils, two effective edges of each coil are placed on respectively in the groove that stator salient poles 2 forms, give coil incoming transport power supply, judge magnetic pole by left hand rule, between two magnetic poles, generate magnetic field.Be alternating current due to what access, magnetic field rotates, and one-period changes a NS utmost point.Can be understood as stator field motionless, rotor rotates in magnetic field.In the time that magnetic field moves in the direction of the clock, the magnetic field of intracavity space is and then rotation just.Epitrochanterian sliver just cuts mutually with magnetic flux, produces induced potential in conductor.According to the right-hand rule, instantaneous, the electric potential direction of rotor left side conductor points out, the electromotive force of right-hand part conductor is for entering.Because rotor conductor is interconnected to form loop by end ring, therefore in conductor, also there is electric current to flow through, ignore the impact of conductor reactance, can think that electric current and induced potential are same-phase, the electric potential direction in sliver is identical with the sense of current.In the time passing through electric current in conductor, in magnetic field, will be subject to the effect of power.Known according to left hand rule, rotor left side conductor be subject to force direction for upwards, right-hand part is downward.These power form torque, and rotor 4 is rotated along the direction of magnetic field rotating.By the alternating current of access, magnetic field is in continuous variation, and rotor constantly rotates along with the variation in magnetic field.
This induction machine suspension theory is: in the time of three phase winding input current to each stator unit, based on electromagnetic bearing suspension technology, under comprehensive detection control system effect, the same direction of differential adjusting is symmetrical in the current increment size of the upper and lower both sides of rotor, to change the magnetic pull size to rotor, make rotor always work in the equilbrium position, center of this direction motor, in the time that rotor departs from center (balance) position △ y along a certain positive direction, the party reduces to the stator and rotor air gap at a side place of upper rotor part, and magnetic flux density increases;
shouldthe stator and rotor air gap at the reverse side place of direction increases, and magnetic flux density reduces.By increasing the input current △ of a side
i ky (
k=A, B, C), become
i ky '=i k + i ky (
k=A, B, C) make it produce radially magnetic pull (Maxwell force) increase to rotor, reduce the input current △ of opposite side stator winding simultaneously
i ky (
k=A, B, C), become
i ky '=i k -i ky , its generation is reduced the radially magnetic pull (Maxwell force) of rotor, under magnetic pull force action radially, reduce the radial load that rotor is subject to, even realize radial suspension.
The utility model is not limited to above-described embodiment; on the basis of the disclosed technical scheme of the utility model; those skilled in the art is according to disclosed technology contents; do not need performing creative labour just can make some replacements and distortion to some technical characterictics wherein, these replacements and distortion are all in protection range of the present utility model.
Claims (3)
1. an induction machine, comprises housing, is coaxially arranged with stator and rotor in housing, and stator is arranged on the periphery of rotor; It is characterized in that: stator is along the circumferential direction divided into n section stator unit, n >=2 and be even number, the arc length of every segment unit is not more than 2 π/n; Every section of stator unit equal intervals is distributed with three stator salient poles; In the stator salient poles of every section of stator unit, homogeneous one correspondence has installed around three phase windings; Each three phase windings are powered respectively through regulating circuit, and stator unit is symmetrically distributed in rotor shaft both sides, and three phase windings in stator unit are also symmetrically distributed.
2. induction machine according to claim 1, is characterized in that described rotor is cage rotor.
3. induction machine according to claim 1, is characterized in that described rotor is phase-wound rotor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420381629.0U CN204013145U (en) | 2014-07-11 | 2014-07-11 | Induction machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420381629.0U CN204013145U (en) | 2014-07-11 | 2014-07-11 | Induction machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204013145U true CN204013145U (en) | 2014-12-10 |
Family
ID=52053082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420381629.0U Expired - Fee Related CN204013145U (en) | 2014-07-11 | 2014-07-11 | Induction machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204013145U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111712996A (en) * | 2018-02-12 | 2020-09-25 | Lg电子株式会社 | Motor drive device for reducing load on rotating shaft |
| CN113410948A (en) * | 2021-06-17 | 2021-09-17 | 南京工程学院 | High-speed asynchronous motor integrating stator section and rotor blade |
-
2014
- 2014-07-11 CN CN201420381629.0U patent/CN204013145U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111712996A (en) * | 2018-02-12 | 2020-09-25 | Lg电子株式会社 | Motor drive device for reducing load on rotating shaft |
| US11398784B2 (en) | 2018-02-12 | 2022-07-26 | Lg Electronics Inc. | Motor driving device for reducing load on rotating shaft |
| CN111712996B (en) * | 2018-02-12 | 2022-07-29 | Lg电子株式会社 | Motor drive device for reducing load on rotating shaft |
| CN113410948A (en) * | 2021-06-17 | 2021-09-17 | 南京工程学院 | High-speed asynchronous motor integrating stator section and rotor blade |
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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: 20141210 Termination date: 20170711 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |