CN202713003U - Hybrid permanent-magnet synchronous motor rotor - Google Patents
Hybrid permanent-magnet synchronous motor rotor Download PDFInfo
- Publication number
- CN202713003U CN202713003U CN 201220363775 CN201220363775U CN202713003U CN 202713003 U CN202713003 U CN 202713003U CN 201220363775 CN201220363775 CN 201220363775 CN 201220363775 U CN201220363775 U CN 201220363775U CN 202713003 U CN202713003 U CN 202713003U
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- Prior art keywords
- permanent magnet
- magnet body
- radial
- rotor core
- radial permanent
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Abstract
The utility model relates to a permanent-magnet synchronous motor, specifically provides a hybrid permanent-magnet synchronous motor rotor, and solves problems that conventional permanent-magnet synchronous motors have low mechanical strength and a large magnetic leakage factor, and thus the cost of the motors is relatively high. The hybrid permanent-magnet synchronous motor rotor comprises a steel shaft and a rotor iron core, wherein a cross section of the rotor iron core is uniformly provided with an even number of radial permanent magnet grooves; each radial permanent magnet groove is provided with a radial permanent magnet; the steel shaft is uniformly provided with an even number of tile-shaped permanent magnets according to polarity; every two adjacent tile-shaped permanent magnets have different polarities and an in-between gap; an inner end of each radial permanent magnet is provided with an opening corresponding to each gap; and the inner ring of the rotor iron core is pressed on an outer side surface of each tile-shaped permanent magnet. The hybrid permanent-magnet synchronous motor rotor is suitable for various kinds of permanent magnet synchronous motors.
Description
Technical field
The utility model relates to permanent magnet synchronous motor, specifically a kind of hybrid permanent magnet type synchronous electric motor rotor.
Background technology
Permanent magnet synchronous motor is comprised of stator and rotor.The magnetic structure of the rotor of permanent magnet synchronous motor can be divided into radial magnetic circuit structure, tangential magnetic structure, hybrid magnetic structure.In the prior art, adopt the following problem of rotor ubiquity of hybrid magnetic structure: one, the mechanical strength of rotor is low.Two, the magnetic leakage factor of rotor is large.Three, it is failed the rule that acts on according to the opposing magnetic field and the characteristic of radial permanent magnet body and carries out the optimal design of radial permanent magnet body in rotor, thereby causes the cost of motor higher.
Make a concrete analysis of as follows: as shown in Figure 1, adopt the rotor of hybrid magnetic structure to comprise steel axle 1 and rotor core 2; Rotor core 2 sections are evenly distributed with even number radial permanent magnet body groove 3 and the circumferential permanent magnet trough 4 of even number; Rotor core 2 inner rings press-fit in steel axle 1 surface; Consist of even number between radial permanent magnet body groove 3 tops and rotor core 2 cylindricals every magnetic magnetic bridge 5; Each radial permanent magnet body groove 3 interior radial permanent magnet bodies 6 that all are equipped with; Each circumferential permanent magnet trough 4 is interior all to be equipped with circumferential permanent magnet 9.As shown in Figure 1: the friction tight power of rotor core and steel axle is from the interior ring of rotor core.When rotor was in static state, it did not stress every the magnetic magnetic bridge.That is to say, when rotor is in static state, the power that each parts (not steely axle) are not held tightly in it.When rotor was subject to larger torsional interaction, all torsion torque all can act on several on the magnetic magnetic bridge.Owing to being to reduce leakage field every the effect of magnetic magnetic bridge, thereby it is typically designed to lamellarly, and its counter-bending ability is relatively poor, so the long-term forward and reverse operation of motor certainly will cause every magnetic magnetic bridge place fatigue rupture occuring.When stating in design the rotor that adopts hybrid magnetic structure, all radial permanent magnet bodies all are designed to have identical performance parameter (being often referred to remanent magnetism, HCJ etc.).This design is based on following hypothesis and carries out: the opposing magnetic field is the same in the effect of internal rotor permanent magnet each point.Yet the radial permanent magnet body approaching with rotor outer circle such phenomenon often appear: in engineering reality, the demagnetization phenomenon just appears in the impact of the large electric current opposing magnetic field that occurs when being subject to motor load starting or overload step-out, and the demagnetization phenomenon just occurs from the radial permanent magnet body of rotor outer circle away from.This phenomenon shows: the opposing magnetic field is different in the effect of internal rotor permanent magnet each point.In other words, the opposing magnetic field is to the effect of internal rotor permanent magnet each point and this some distance dependent to the center of circle: this is nearer from the center of circle, a little less than healing to the effect of this point in the opposing magnetic field, on the contrary then opposite.Can draw according to this conclusion: existing permanent-magnet synchronous motor rotor is failed the rule that acts on according to the opposing magnetic field and the characteristic of radial permanent magnet body and is carried out the optimal design of radial permanent magnet body in rotor, thereby causes the cost of motor higher.Based on above-mentioned analysis, low for the rotor mechanical intensity of the hybrid magnetic structure of available technology adopting, magnetic leakage factor large and cause the higher problem of motor cost, is necessary to invent a kind of brand-new permanent-magnet synchronous motor rotor.
Summary of the invention
Existing permanent-magnet synchronous motor rotor mechanical strength is low, magnetic leakage factor large and cause the higher problem of motor cost, and a kind of hybrid permanent magnet type synchronous electric motor rotor is provided in order to solve for the utility model.
The utility model is to adopt following technical scheme to realize: a kind of hybrid permanent magnet type synchronous electric motor rotor comprises steel axle and rotor core; The rotor core section is evenly distributed with even number radial permanent magnet body groove; In each radial permanent magnet body groove the radial permanent magnet body is installed all; Be evenly distributed with even number watt shape permanent magnet by polarity on the steel axle, the polarity of adjacent two watts of shape permanent magnets is different, and leaves the gap between adjacent two watts of shape permanent magnets; Opening is all left in the inner of each radial permanent magnet body groove, and each opening is corresponding with each gap respectively; The rotor core inner ring press-fits in each watt shape permanent magnet lateral surface.
During work, watt shape permanent magnet consists of radial magnetic circuit, and the radial permanent magnet body in the radial permanent magnet body groove consists of tangential magnetic circuit, and the two consists of mixed magnetic circuit jointly.Watt shape permanent magnet is as the link between steel axle and the rotor core, played the radial permanent magnet body that preventing in the radial permanent magnet body groove in the effect of the leakage field of bottom, provides magnetic flux for rotor again simultaneously.It is as follows that the effect of opening is left in radial permanent magnet body groove inboard: one, with in the existing rotor every the decreased number of magnetic magnetic bridge 2/3rds, namely be equivalent to reduce 2/3rds leakage field, can have suitably reduced thus the consumption of radial permanent magnet body, reduced the motor manufacturing cost.Its two, changed the stress of internal rotor.Since reduced be positioned in the prior art rotor rotor core inboard every the magnetic magnetic bridge, the friction tight power T that all relies on oneself between steel axle and the rotor core, as shown in Figure 4.Because power T all acts on the rotor core outside, by designing suitable steel axle and the fit tolerance between the rotor core, makes capable T enough large, hold each parts in the rotor tightly formation one rigid body.Act on epitrochanterian moment of torsion this moment and namely decompose each position at rotor fully.Acting on mainly is pulling force on the magnetic magnetic bridge, and its moment of torsion is almost nil.Therefore, satisfying under the prerequisite of same mechanical strength, with comparing every the magnetic magnetic bridge in the existing rotor, a kind of hybrid permanent magnet type synchronous electric motor rotor described in the utility model can design thinlyyer every the magnetic magnetic bridge, its leakage field still less, can further reduce thus the consumption of permanent magnet, further reduce the motor manufacturing cost.Based on said process, a kind of hybrid permanent magnet type synchronous electric motor rotor described in the utility model efficiently solves the existing problem that the permanent-magnet synchronous motor rotor mechanical strength is low, magnetic leakage factor is large.
Further, the HCJ of the radial permanent magnet body close to healing from the rotor core center of circle is less, and the HCJ of the radial permanent magnet body away from healing from the rotor core center of circle is larger.During work, the effect of the opposing magnetic field that the radial permanent magnet body close to healing from the rotor core center of circle is suffered is less, and the effect of the opposing magnetic field that the radial permanent magnet body away from healing from the rotor core center of circle is suffered is larger.According to the characteristic of permanent magnet as can be known, the HCJ of permanent magnet is less, to the resistance of opposing magnetic field just more a little less than.That is to say, the HCJ little permanent magnet more easily demagnetization under the effect of opposing magnetic field of healing, on the contrary then opposite.Based on above-mentioned theory, when design a kind of hybrid permanent magnet type synchronous electric motor rotor described in the utility model, the radial permanent magnet body with different HCJ is installed at different radii place at rotor core, greatly reduces thus the cost (this is owing to the less permanent magnet of the HCJ permanent magnet cost larger than HCJ is much lower) of permanent magnet synchronous motor.Based on said process, a kind of hybrid permanent magnet type synchronous electric motor rotor described in the utility model efficiently solves existing permanent-magnet synchronous motor rotor and causes the higher problem of motor cost.
The utility model is based on brand new, efficiently solves that existing permanent-magnet synchronous motor rotor mechanical strength is low, magnetic leakage factor large and cause the higher problem of motor cost, is applicable to various permanent magnet synchronous motors.
Description of drawings
Fig. 1 is the structural representation that adopts the prior art rotor of hybrid magnetic structure.
Fig. 2 is the first structural representation of the present utility model.
Fig. 3 is the second structural representation of the present utility model.
Fig. 4 is the partial schematic diagram of Fig. 2.
Among the figure: 1-steel axle, the 2-rotor core, 3-radial permanent magnet body groove, the circumferential permanent magnet trough of 4-, 5-is every the magnetic magnetic bridge, 6-radial permanent magnet body, 7-watt of shape permanent magnet, 8-is gap radially, the circumferential permanent magnet of 9-; T represents on the rotor core slider power suffered on the magnetic magnetic bridge, and N represents that the steel axle is to the supporting reaction force of rotor core.
Embodiment
Embodiment one
A kind of hybrid permanent magnet type synchronous electric motor rotor comprises steel axle 1 and rotor core 2; Rotor core 2 sections are evenly distributed with even number radial permanent magnet body groove 3; Each radial permanent magnet body groove 3 interior radial permanent magnet bodies 6 that all are equipped with; Be evenly distributed with even number watt shape permanent magnet 7 by polarity on the steel axle 1, the polarity of adjacent two watts of shape permanent magnets 7 is different, and leaves the gap between adjacent two watts of shape permanent magnets 7; Opening is all left in the inner of each radial permanent magnet body groove 3, and each opening is corresponding with each gap respectively; Rotor core 2 inner rings press-fit in each watt shape permanent magnet 7 lateral surfaces;
The HCJ of the radial permanent magnet body 6 close to healing from rotor core 2 centers of circle is less, and the HCJ of the radial permanent magnet body 6 away from healing from rotor core 2 centers of circle is larger;
6 number averages of radial permanent magnet body of each radial permanent magnet body groove 3 interior installation are more than or equal to 2;
The shape and size of each radial permanent magnet body groove 3 interior end openings are arbitrarily;
In the present embodiment, as shown in Figure 2, consist of even number between radial permanent magnet body groove 3 tops and rotor core 2 cylindricals every magnetic magnetic bridge 5; From rotor core 2 centers of circle farthest radial permanent magnet body 6 outer ends and rotor core 2 cylindricals between keep certain radial distance; From rotor core 2 centers of circle farthest radial permanent magnet body 6 outer ends and between magnetic magnetic bridge 5 medial surfaces, keep certain radial distance; During work, this radial distance can reduce the opposing magnetic field to the radially impact of permanent magnet;
During implementation, the shape of the interior end opening of each radial permanent magnet body groove 3 can be designed to complete opening, also can be designed to the part opening.
Embodiment two
A kind of hybrid permanent magnet type synchronous electric motor rotor comprises steel axle 1 and rotor core 2; Rotor core 2 sections are evenly distributed with even number radial permanent magnet body groove 3; Each radial permanent magnet body groove 3 interior radial permanent magnet bodies 6 that all are equipped with; Be evenly distributed with even number watt shape permanent magnet 7 by polarity on the steel axle 1, the polarity of adjacent two watts of shape permanent magnets 7 is different, and leaves the gap between adjacent two watts of shape permanent magnets 7; Opening is all left in the inner of each radial permanent magnet body groove 3, and each opening is corresponding with each gap respectively; Rotor core 2 inner rings press-fit in each watt shape permanent magnet 7 lateral surfaces;
The HCJ of the radial permanent magnet body 6 close to healing from rotor core 2 centers of circle is less, and the HCJ of the radial permanent magnet body 6 away from healing from rotor core 2 centers of circle is larger;
6 number averages of radial permanent magnet body of each radial permanent magnet body groove 3 interior installation are more than or equal to 2;
The shape and size of each radial permanent magnet body groove 3 interior end openings are arbitrarily;
In the present embodiment, as shown in Figure 3, rotor core 2 outer rings are evenly distributed with several radially gap 8; All radially gap 8 is corresponding with one of them for each radial permanent magnet body groove 3; Radial permanent magnet body groove 3 tops and radially consist of even number between gap 8 bottoms every magnetic magnetic bridge 5; From rotor core 2 centers of circle farthest radial permanent magnet body 6 outer ends and rotor core 2 cylindricals between keep certain radial distance; From rotor core 2 centers of circle farthest radial permanent magnet body 6 outer ends and between magnetic magnetic bridge 5 medial surfaces near to or in contact with;
During implementation, the shape of the interior end opening of each radial permanent magnet body groove 3 can be designed to complete opening, also can be designed to the part opening.
Claims (6)
1. a hybrid permanent magnet type synchronous electric motor rotor comprises steel axle (1) and rotor core (2); Rotor core (2) section is evenly distributed with even number radial permanent magnet body groove (3); In each radial permanent magnet body groove (3) radial permanent magnet body (6) is installed all; It is characterized in that: steel axle (1) is upper to be evenly distributed with even number watt shape permanent magnet (7) by polarity, and the polarity of adjacent two watts of shape permanent magnets (7) is different, and leaves the gap between adjacent two watts of shape permanent magnets (7); Opening is all left in the inner of each radial permanent magnet body groove (3), and each opening is corresponding with each gap respectively; Rotor core (2) inner ring press-fits in each watt shape permanent magnet (7) lateral surface.
2. a kind of hybrid permanent magnet type synchronous electric motor rotor according to claim 1, it is characterized in that: the HCJ of the radial permanent magnet body (6) close to healing from rotor core (2) center of circle is less, and the HCJ of the radial permanent magnet body (6) away from healing from rotor core (2) center of circle is larger.
3. a kind of hybrid permanent magnet type synchronous electric motor rotor according to claim 1 and 2 is characterized in that: the individual number average of radial permanent magnet body (6) of installing in each radial permanent magnet body groove (3) is more than or equal to 2.
4. a kind of hybrid permanent magnet type synchronous electric motor rotor according to claim 1 and 2, it is characterized in that: the shape and size of the interior end opening of each radial permanent magnet body groove (3) are arbitrarily.
5. a kind of hybrid permanent magnet type synchronous electric motor rotor according to claim 1 and 2 is characterized in that: consist of even number between radial permanent magnet body groove (3) top and rotor core (2) cylindrical every magnetic magnetic bridge (5); From rotor core (2) center of circle farthest radial permanent magnet body (6) outer end and rotor core (2) cylindrical between keep certain radial distance; From rotor core (2) center of circle farthest radial permanent magnet body (6) outer end and between magnetic magnetic bridge (5) medial surface, keep certain radial distance.
6. a kind of hybrid permanent magnet type synchronous electric motor rotor according to claim 1 and 2, it is characterized in that: rotor core (2) outer ring is evenly distributed with several radially gap (8); All radially gap (8) is corresponding with one of them for each radial permanent magnet body groove (3); Radial permanent magnet body groove (3) top and radially consist of even number between gap (8) bottom every magnetic magnetic bridge (5); From rotor core (2) center of circle farthest radial permanent magnet body (6) outer end and rotor core (2) cylindrical between keep certain radial distance; From rotor core (2) center of circle farthest radial permanent magnet body (6) outer end and between magnetic magnetic bridge (5) medial surface near to or in contact with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220363775 CN202713003U (en) | 2012-07-26 | 2012-07-26 | Hybrid permanent-magnet synchronous motor rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220363775 CN202713003U (en) | 2012-07-26 | 2012-07-26 | Hybrid permanent-magnet synchronous motor rotor |
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| Publication Number | Publication Date |
|---|---|
| CN202713003U true CN202713003U (en) | 2013-01-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220363775 Expired - Fee Related CN202713003U (en) | 2012-07-26 | 2012-07-26 | Hybrid permanent-magnet synchronous motor rotor |
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| Country | Link |
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| CN (1) | CN202713003U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102769347A (en) * | 2012-07-26 | 2012-11-07 | 岳群生 | Mixed permanent magnet synchronous motor rotor |
-
2012
- 2012-07-26 CN CN 201220363775 patent/CN202713003U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102769347A (en) * | 2012-07-26 | 2012-11-07 | 岳群生 | Mixed permanent magnet synchronous motor rotor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shanxi megawin Naite Motor Technology Co Ltd Assignor: Yue Qunsheng Contract record no.: 2014990000551 Denomination of utility model: Mixed permanent magnet synchronous motor rotor Granted publication date: 20130130 License type: Exclusive License Record date: 20140717 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130130 Termination date: 20170726 |