CN202424450U - Hybrid excitation magnetic pole structure - Google Patents
Hybrid excitation magnetic pole structure Download PDFInfo
- Publication number
- CN202424450U CN202424450U CN2011205725841U CN201120572584U CN202424450U CN 202424450 U CN202424450 U CN 202424450U CN 2011205725841 U CN2011205725841 U CN 2011205725841U CN 201120572584 U CN201120572584 U CN 201120572584U CN 202424450 U CN202424450 U CN 202424450U
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- permanent magnet
- magnetic pole
- field structure
- excitation field
- determination
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Abstract
The utility model discloses a hybrid excitation magnetic pole structure. The hybrid excitation magnetic pole structure comprises a core magnetic pole, a winding coil and a permanent magnet; the winding coil is wound on the core magnetic pole; the permanent magnet is internally arranged in the core magnetic pole; the magnetizing direction of the permanent magnet is the direction of the centerline of a magnetic pole of the winding coil or a core; and the distance L from the permanent magnet to a pole surface A of the core magnetic pole is greater than zero. Due to the action of the permanent magnet, remaining induced magnetic field can trend to zero within a shorter time after the current in the coil is switched off, and then, a bigger current switch-off angle is obtained; and a motor with the magnetic pole structure has a greater average torque and less vibration. Furthermore, the hybrid excitation magnetic pole structure has the advantages that the manufacturing and the mounting are easy, the permanent magnet difficultly demagnetizes, and the service life is long.
Description
Technical field
The utility model relates to a kind of field structure that is applied to motor, relates in particular to a kind of composite excitation field structure, belongs to electric driving arrangement field.
Background technology
Since there are not permanent magnet or winding on the rotor of variable reluctance motor, simple in structure, firm reliable, and the fault-tolerant operation ability is strong, and speed governing is simple, and suitable high-speed cruising has huge development and application potential in the variable speed drives application.
Usually, variable reluctance motor is the structure of the biconvex utmost point, is evenly equipped with the salient pole that some is arranged according to certain rules on stator and the rotor, and no winding or permanent magnet on the rotor are wound with coil on the salient pole of stator; Rotor always turns to the maximum position of inductance from the minimum position of inductance, through the switching between the phase current, reaches and causes continuous rotation acting.
Yet, when phase current switches,, produced negative torque owing to respond to the effect of magnetic flux mutually, cause the moment of torsion density that has reduced motor, also make motor be difficult at full capacity externally acting.
In order to improve the problems referred to above; Extra circuit generally to be set supply with extracurrent; Close the downslope time of having no progeny to reduce phase current, perhaps shift to an earlier date next phase of conducting, to remedy the loss that phase current closes the induced current of having no progeny or responds to the negative torque of magnetic flux generation.
More than in two kinds of schemes or reduced Motor torque density, perhaps reduced efficient, also increased the complexity and the cost of control system simultaneously.
Summary of the invention
The utility model provides a kind of composite excitation field structure, to reduce the negative torque in the phase current handoff procedure, improves electric efficiency and moment of torsion density and reduces the output torque fluctuation; Improve the useful life of motor simultaneously.
Be technical problem described in the technical solution background, the utility model adopts following technical scheme:
A kind of composite excitation field structure; Comprise magnetic pole unshakable in one's determination, coil windings and permanent magnet, wherein, permanent magnet is built in the magnetic pole unshakable in one's determination; The magnetizing direction of permanent magnet is the center line center line along the coil winding; Distance L between the magnetic pole pole-face A of permanent magnet and iron core is greater than zero, and coil windings is wound on the magnetic pole unshakable in one's determination that is built-in with permanent magnet;
When coil windings was not switched on, the permanent magnet magnetic flux was closed in magnetic pole unshakable in one's determination; When energising, electro-magnetic flux and permanent magnet magnetic flux form mixed excited magnetic pass and externally do work; When outage; Because the effect of permanent magnet, the electric current in the coil windings will drop to zero in shorter time, thereby; Adopt the variable reluctance motor of this composite excitation field structure; Stator current can be closed near the moment of conllinear in stator salient poles and rotor with salient pole, obtains bigger average torque output, higher moment of torsion density.
Wherein, the punching of being processed with permeability magnetic material by motor of described magnetic pole unshakable in one's determination is overrided to form.
Wherein, described magnetic pole unshakable in one's determination is processed by permeability magnetic material.
Wherein, the magnetizing direction of permanent magnet is the center line center line along winding.
Wherein, permanent magnet near the end of magnetic pole pole-face A unshakable in one's determination and the distance L between the magnetic pole pole-face A unshakable in one's determination greater than zero.
Compared with prior art, the utlity model has following beneficial effect:
(1) permanent magnet is built in the stator segment iron core, and between phase current switched, negative torque was littler;
(2) permanent magnet is installed simple;
(3) because the permanent magnet magnetic flux is parallelly connected with electro-magnetic flux, be difficult for demagnetization, the life-span is long;
(4) under equal conditions, because the existence of permanent magnet magnetic flux, required phase current is littler;
Description of drawings
Fig. 1 is general variable reluctance motor magnetic pole of the stator structure
Fig. 2 is a kind of composite excitation field structure sketch map of the utility model;
Fig. 3 is a kind of composite excitation field structure sketch map of the second specific embodiment segmentation permanent magnet of the utility model;
Fig. 4 is a kind of composite excitation field structure sketch map of the 3rd specific embodiment segmentation permanent magnet of the utility model;
Fig. 5 is instance-four phase 8/6 utmost point variable reluctance motor structural representation using the utility model.
Embodiment
Below in conjunction with specific embodiment, further specify the purpose and the application thereof of the utility model.
With reference to figure 1, be common variable reluctance motor magnetic pole of the stator structural representation.
With reference to figure 2, be the first specific embodiment composite excitation field structure sketch map of the utility model;
Comprise iron core, coil windings (2), permanent magnet (3), iron core is made up of yoke portion (6) and magnetic pole (5), and permanent magnet (3) is built in the magnetic pole (5); Permanent magnet (3) is L near an end and the distance between the magnetic pole pole-face of magnetic pole (5) pole-face A, and wherein L is greater than zero, and the magnetizing direction of permanent magnet is along coil or pole center line center line unshakable in one's determination; When coil windings was not switched on, the permanent magnet magnetic flux was closed in magnetic pole unshakable in one's determination, when coil windings is switched on; Electro-magnetic flux forms with the permanent magnet magnetic flux and mixes magnetic flux, externally output acting, the electric current in turn-offing coil windings; Because the effect of permanent magnet; With reducing the time that this electric current goes to zero, close the angle of rupture thereby increase electric current, improve Motor torque density.
With reference to figure 3, be a kind of composite excitation field structure sketch map of the second specific embodiment segmentation permanent magnet of the utility model;
Permanent magnet is made up of three sections permanent magnets (3-1,3-2,3-3); Every section permanent magnet magnetizing direction all is the pole center line center line along iron core; Contact-making surface between the permanent magnet is vertical with pole center line center line unshakable in one's determination, to reduce eddy current loss in the permanent magnet; Other are identical with first specific embodiment, repeat no more here.
With reference to figure 4, be a kind of composite excitation field structure sketch map of the 3rd specific embodiment segmentation permanent magnet of the utility model;
Permanent magnet is made up of three sections permanent magnets (3-10,3-20,3-30); Contact-making surface between the permanent magnet is parallel with pole center line center line unshakable in one's determination; Every section permanent magnet magnetizing direction all is the pole center line center line along iron core, to reach the purpose that reduces eddy current loss in the permanent magnet; Other are identical with first specific embodiment, repeat no more here.
Should be noted that permanent magnet is made up of the permanent magnet of segmentation in the second and the 3rd specific embodiment, be respectively (3-1,3-2,3-3) and (3-10,3-20,3-30), to reach the purpose that reduces eddy current loss in the permanent magnet; Equally, permanent magnet can be made up of four sections or segmentation permanent magnets more or still less, the contact-making surface between the permanent magnet of segmentation also can be with the pole center line not parallel or out of plumb; Here only as an example, with specific embodiment rather than the restriction purpose.
With reference to figure 5, for using instance-four phase 8/6 utmost point variable reluctance motor structural representation of the utility model;
In this instance four 8/6 utmost point variable reluctance motor mutually is the internal rotor electric rotating machine; Form by stator core (1), rotor core (7), coil windings (2) and output shaft (6); Four are respectively (A1-A2, B1-B2, C1-C2, D1-D2) mutually; Wherein, stator core (1), it has 8 with the radially inwardly outstanding magnetic pole (5) of predetermined spacing; Coil windings (2), it is wound in the inwardly outstanding magnetic pole (5) of stator core on every side; Rotor core (7), it has 6 with the radially outwards outstanding magnetic pole (4) of predetermined spacing; Permanent magnet (3) is built in the inwardly outstanding magnetic pole (5) in the stator core, and this permanent magnet (3) magnetizes along pole center line direction; Inwardly outstanding magnetic pole (5) on coil windings (2), permanent magnet (3) and the stator has been formed the composite excitation field structure of the utility model; Rotor rotates with predetermined counter clockwise direction; A1-A2 phase conllinear; This phase current turn-offs, and D1-D2 is the phase of next conducting mutually, adopts the composite excitation field structure of the utility model; The induction magnetic flux that makes the A1-A2 phase current when turn-offing, produce was gone to zero in the shorter time, reduced A1-A2 like this and acted on epitrochanterian negative torque mutually;
Should be noted that to provide this instance to further specify the purpose of the utility model, the application of the utility model is not limited to above-mentioned instance, can use other situation equally, for example linear electric motors etc.
Though the specific embodiment of the utility model has disclosed as above; The utility model is not limited to above-mentioned specific embodiment; The technical staff, can change open embodiment under the situation that does not break away from the utility model when understanding; Therefore, top several embodiment only are used for example and are not used in the purpose of restriction.
Claims (6)
1. composite excitation field structure; It is characterized in that, comprise magnetic pole unshakable in one's determination, coil windings and permanent magnet, wherein; Permanent magnet is built in the magnetic pole unshakable in one's determination; The magnetizing direction of permanent magnet is the center line center line along the coil winding, and the distance L between the magnetic pole pole-face A of permanent magnet and iron core is greater than zero, and coil windings is wound in around the magnetic pole unshakable in one's determination that is built-in with permanent magnet.
2. composite excitation field structure according to claim 1 is characterized in that the punching that described iron core is processed by soft magnetic material is overrided to form, or is processed by other permeability magnetic materials.
3. composite excitation field structure according to claim 1 is characterized in that, described permanent magnet is built in the magnetic pole unshakable in one's determination.
4. composite excitation field structure according to claim 1 is characterized in that, the magnetizing direction of said permanent magnet is the center line center line along coil winding or magnetic pole unshakable in one's determination.
5. composite excitation field structure according to claim 3 is characterized in that, described permanent magnet can be made up of the segmentation permanent magnet.
6. composite excitation field structure according to claim 1 is characterized in that, the distance between the magnetic pole pole-face A of permanent magnet in the magnetic pole of said iron core and iron core is greater than zero.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205725841U CN202424450U (en) | 2011-12-31 | 2011-12-31 | Hybrid excitation magnetic pole structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205725841U CN202424450U (en) | 2011-12-31 | 2011-12-31 | Hybrid excitation magnetic pole structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202424450U true CN202424450U (en) | 2012-09-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205725841U Expired - Fee Related CN202424450U (en) | 2011-12-31 | 2011-12-31 | Hybrid excitation magnetic pole structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202424450U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102420511A (en) * | 2011-12-31 | 2012-04-18 | 何嘉颖 | Mixed-excitation magnetic pole structure |
| CN104065227A (en) * | 2013-03-19 | 2014-09-24 | 济南吉美乐电源技术有限公司 | Flux-weakening method of doubly salient motor and wide speed governing doubly salient hybrid excitation motor |
| CN105790522A (en) * | 2016-05-11 | 2016-07-20 | 山东理工大学 | Production method for electromagnetic and permanent magnet parallel magnetic field mixed excitation generator rotor |
-
2011
- 2011-12-31 CN CN2011205725841U patent/CN202424450U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102420511A (en) * | 2011-12-31 | 2012-04-18 | 何嘉颖 | Mixed-excitation magnetic pole structure |
| CN104065227A (en) * | 2013-03-19 | 2014-09-24 | 济南吉美乐电源技术有限公司 | Flux-weakening method of doubly salient motor and wide speed governing doubly salient hybrid excitation motor |
| CN105790522A (en) * | 2016-05-11 | 2016-07-20 | 山东理工大学 | Production method for electromagnetic and permanent magnet parallel magnetic field mixed excitation generator rotor |
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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: 20120905 Termination date: 20141231 |
|
| EXPY | Termination of patent right or utility model |