CN102594068A - Method for widening weak magnetic speed regulating range of permanent magnet synchronous motor and stator of permanent magnet synchronous motor - Google Patents
Method for widening weak magnetic speed regulating range of permanent magnet synchronous motor and stator of permanent magnet synchronous motor Download PDFInfo
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- CN102594068A CN102594068A CN201210018932XA CN201210018932A CN102594068A CN 102594068 A CN102594068 A CN 102594068A CN 201210018932X A CN201210018932X A CN 201210018932XA CN 201210018932 A CN201210018932 A CN 201210018932A CN 102594068 A CN102594068 A CN 102594068A
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Abstract
The invention discloses a method for widening weak magnetic speed regulating range of a permanent magnet synchronous motor. The method comprises the steps of pouring epoxy resin at the end parts of stator windings of the permanent magnet synchronous motor, and forming a mixed fluid substance with soft magnet powder with insulated surface, then curing and forming into a soft magnetic composite material, wherein the soft magnetic composite material and the end parts of the stator windings form an entity for increasing magnetic conductance of magnetic paths with leakage magnetic flux at the end parts of the stator windings, so that leakage inductance at the end parts of the stator windings is increased, and total inductance of the stator windings is increased, therefore, the weak magnetic speed regulating range of the permanent magnet synchronous motor is widened. The soft magnet powder with insulated surface has good magnetic conductivity and is small in iron loss due to small diameter. In general, the higher the ratio of the soft magnet powder in the soft magnetic composite material formed by mixing and curing the epoxy resin and the soft magnet powder with insulated surface is, the larger the magnetic conductance of magnetic paths with leakage magnetic flux at the end parts of the stator windings is, and the larger the leakage inductance at the end parts of the stator windings is.
Description
Technical field
The present invention relates to the electrical engineering field, relate in particular to a kind of method that the end leakage inductance is widened permanent magnet synchronous motor weak-magnetic speed-regulating scope that increases.
Background technology
Permanent magnet synchronous motor has many advantages, but the weak-magnetic speed-regulating scope is narrow, makes it need the application places of high speed adjustable range to be restricted at some.The narrow main cause of permanent magnet synchronous motor weak-magnetic speed-regulating scope is to approach the air permanent magnet excitation owing to all placed magnetic permeability on the permanent-magnet synchronous motor rotor d-axis; Direct axis reluctance is bigger; The d-axis inductance is less, causes permanent magnet synchronous motor " weak magnetic " expansion speed difficulty.How to widen the permanent power of permanent magnet synchronous motor high speed " weak magnetic " scope and don't obviously reduce low speed torque, become the important topic of permanent magnet synchronous motor design and Control Study.At present; The basic means of the weak magnetism speed expansion that permanent magnet synchronous motor adopts usually is to manage to increase the d-axis inductance, or adopts special construction, like synchronous magnetic resistance permanent magnet synchronous motor; Permanent magnet segments adds the composite rotors structure permanent magnet synchronous motor of magnetic resistance section; Composite excitation permanent magnet synchronous motor, permanent magnetic circuit become magnetic resistance controllable flux permanent magnet synchronous motor, and the controllable flux permanent magnet synchronous motor.The permanent magnet synchronous motor of above-mentioned cited special construction, a series of reasons such as special owing to its structure, that price is higher, technology is immature are failed to obtain to popularize and are used widely.
Summary of the invention
Manage to increase the basic means that the d-axis inductance reaches the permanent magnet synchronous motor weak magnetism speed expansion to what adopt at present usually, it is a kind of through increasing the method that the end leakage inductance realizes widening permanent magnet synchronous motor weak-magnetic speed-regulating scope that the present invention provides.
In order to solve the problems of the technologies described above, the present invention widens the technical scheme that the method for permanent magnet synchronous motor weak-magnetic speed-regulating scope is achieved and is:
The mixed flow animal that the soft magnetism iron powder of handling through insulation on permanent magnet synchronous motor stator winding end casting epoxy resin and surface constitutes, curing molding is a soft-magnetic composite material then; Common this part entity that constitutes of said soft-magnetic composite material and stator winding end has increased permanent magnet synchronous motor stator winding end leakage permeance; Make permanent magnet synchronous motor stator winding end leakage inductance increase, thereby widen the weak-magnetic speed-regulating scope of said permanent magnet synchronous motor.
The stator of internal rotor external stator permanent magnet synchronous motor of the present invention comprises the soft-magnetic composite material that stator core, stator winding, electric machine stand and said stator winding end are peripheral; And make by following steps:
The stator of external rotor internal stator permanent magnet synchronous motor of the present invention comprises stator core, the soft-magnetic composite material that stator winding, stator core bolster and said stator winding end are peripheral; And make by following steps:
Say that further the weight ratio of the soft magnetism iron powder that handle through insulation on epoxy resin and surface in the soft-magnetic composite material described in the present invention is 1: 10～10: 1.
Compared with prior art, the invention has the beneficial effects as follows:
The present invention implements very convenient; At stator winding end casting epoxy resin and surperficial behind the soft magnetism iron powder mixed flow thing curing molding that insulation is handled; The stator winding end leakage inductance obviously increases; Motor is handed over and the d-axis synchronous inductance all increases thereupon, and the weak-magnetic speed-regulating scope of permagnetic synchronous motor can be widened.During enforcement; Through changing epoxy resin and the shape of surface through the soft magnetism iron powder mixed flow thing cast cured explosive moulding position that insulation is handled; Perhaps change the ratio of epoxy resin and soft magnetism iron powder; Can change the magnetic conductance of stator winding end leakage flux magnetic circuit, thereby change the size of each phase winding end leakage inductance of stator.Generally speaking; The space at epoxy resin and soft magnetism iron powder mixed flow thing cast cured explosive moulding position is big more; Or the shared ratio of soft magnetism iron powder is big more in epoxy resin and the soft magnetism iron powder mixed flow thing; The magnetic conductance of stator winding end leakage flux magnetic circuit is big more, and each phase winding end leakage inductance of stator is also big more.
Description of drawings
Fig. 1 is the sketch map behind internal rotor external stator permanent magnet synchronous motor stator winding end casting epoxy resin of the present invention and the soft magnetism iron powder mixed flow thing curing molding;
Fig. 2 is the sketch map behind external rotor internal stator permanent magnet synchronous motor stator winding end casting epoxy resin of the present invention and the soft magnetism iron powder mixed flow thing curing molding.
Embodiment
Below in conjunction with embodiment the present invention is done to describe in further detail.
The present invention widens the method for permanent magnet synchronous motor weak-magnetic speed-regulating scope, mainly is through increasing each phase winding end leakage inductance of stator to improve permanent magnet synchronous motor weak-magnetic speed-regulating scope.That is, the mixed flow animal that the soft magnetism iron powder of handling through insulation on permanent magnet synchronous motor stator winding end casting epoxy resin and surface constitutes, curing molding is a soft-magnetic composite material then; Common this part entity that constitutes of said soft-magnetic composite material and stator winding end has increased permanent magnet synchronous motor stator winding end leakage permeance; Make permanent magnet synchronous motor stator winding end leakage inductance increase, thereby widen the weak-magnetic speed-regulating scope of said permanent magnet synchronous motor.
As shown in Figure 1, the stator of internal rotor external stator permanent magnet synchronous motor of the present invention comprises the soft-magnetic composite material 4 that stator core 1, stator winding 2, electric machine stand 3 and said stator winding 2 ends are peripheral; And made by following steps: the wire insertion technology according to internal rotor external stator permanent magnet synchronous motor stator winding embeds stator winding 2 in the stator coring grooves; The as a whole winding dipping lacquer that carries out is made in the stator core that is embedded with stator winding 21 to be handled; The stator core that is embedded with stator winding 21 after the dipping lacquer processing is pressed in the electric machine stand 3; To, the soft magnetism iron powder that insulation is handled constitute uniform fluid after mixing by epoxy resin and surface; Overlap the place, end that the casting mold that scribbles release agent is separately fixed at the stator winding 2 that is positioned at electric machine stand 3 both sides with two; Between casting mold and electric machine stand 3, formed stator winding end space on every side; Above-mentioned fluid is poured in this space; The demoulding behind the curing molding is formed with soft-magnetic composite material 4 in periphery, said stator winding 2 end, promptly obtains the finished product stator of internal rotor external stator permanent magnet synchronous motor.
As shown in Figure 2, the stator of external rotor internal stator permanent magnet synchronous motor comprises stator core 1, the soft-magnetic composite material 4 that stator winding 2, stator core bolster 5 and said stator winding 2 ends are peripheral; And made by following steps: the wire insertion technology according to external rotor internal stator permanent magnet synchronous motor stator winding embeds stator winding 2 in the stator coring grooves; The as a whole winding dipping lacquer that carries out is made in the stator core that is embedded with stator winding 21 to be handled; The stator core that is embedded with stator winding 21 after the dipping lacquer processing is pressed in the stator core bolster 5; To, the soft magnetism iron powder that insulation is handled constitute uniform fluid after mixing by epoxy resin and surface; Overlap the place, end that the casting mold that scribbles release agent is separately fixed at the stator winding 2 that is positioned at stator core bolster 5 both sides with two; Between casting mold and stator core bolster 5, formed stator winding end space on every side; Above-mentioned fluid is poured in this space; The demoulding behind the curing molding is formed with soft-magnetic composite material 4 in periphery, said stator winding 2 end, promptly obtains the finished product stator of external rotor internal stator permanent magnet synchronous motor.
Among the present invention; Epoxy resin can be 1: 10～10: 1 with the surface through the weight ratio of the soft magnetism iron powder of insulation processing in the said soft-magnetic composite material; There is not too strict ratio restriction; The surface is big more through the shared ratio of the soft magnetism iron powder of insulation processing in the soft-magnetic composite material 4, and the magnetic conductance of stator winding end leakage flux magnetic circuit is big more, and the stator winding end leakage inductance is also big more.The epoxy resin of selecting for use should have good insulation performance and heat conductivility, is beneficial to the insulation and the heat radiation of winding; The diameter very small (being generally 50～150 μ m) of the soft magnetism iron powder that handle through insulation on the surface and surface have been done insulation and have been handled, both magnetic conductions, and iron loss is also little.Certainly, for enforcement under normal temperature condition, epoxy resin is selected amine curing agent for use.In addition, in order to improve the flexibility of resin, also can use flexibilizer like dibutyl phthalate or dioctyl phthalate.
Motor finished product stator according to aforesaid way obtains assembling with other parts of motor, is assembled into a complete permanent magnet synchronous motor.Since the stator winding end moulding by casting the existence of compound soft magnetic material (be epoxy resin handle through insulation with the surface soft magnet powder mixture); The magnetic conductance of stator winding end leakage flux magnetic circuit increases; Each phase winding end leakage inductance of stator is directly proportional with the magnetic conductance of its leakage flux magnetic circuit; Therefore each phase winding end leakage inductance of stator increases, so total leakage inductance of each phase winding of stator increases thereupon; The total inductance of each phase winding of stator also increases, and the friendship of permanent magnet synchronous motor and d-axis synchronous inductance all increase.Because the d-axis synchronous inductance of permanent magnet synchronous motor is big more; The weak-magnetic speed-regulating scope of permagnetic synchronous motor is wide more; Therefore; Permanent magnet synchronous motor stator winding end casting epoxy resin and the soft magnetism iron powder mixed flow thing curing molding this method of surface through the insulation processing can be widened permanent magnet synchronous motor weak-magnetic speed-regulating scope.
Although invention has been described for top combination figure; But the present invention is not limited to above-mentioned embodiment, and above-mentioned embodiment only is schematically, rather than restrictive; Those of ordinary skill in the art is under enlightenment of the present invention; Under the situation that does not break away from aim of the present invention, can also make a lot of distortion, these all belong within the protection of the present invention.
Claims (6)
1. method of widening permanent magnet synchronous motor weak-magnetic speed-regulating scope; It is characterized in that; The mixed flow animal that the soft magnetism iron powder of handling through insulation on permanent magnet synchronous motor stator winding end casting epoxy resin and surface constitutes, curing molding is a soft-magnetic composite material then; Common this part entity that constitutes of said soft-magnetic composite material and stator winding end has increased permanent magnet synchronous motor stator winding end leakage permeance; Make permanent magnet synchronous motor stator winding end leakage inductance increase, thereby widen the weak-magnetic speed-regulating scope of said permanent magnet synchronous motor.
2. the method for widening permanent magnet synchronous motor weak-magnetic speed-regulating scope according to claim 1 is characterized in that, epoxy resin is 1: 10～10: 1 with the surface through the weight ratio of the soft magnetism iron powder of insulation processing in the said soft-magnetic composite material.
3. the stator of an internal rotor external stator permanent magnet synchronous motor is characterized in that, comprises the soft-magnetic composite material (4) that stator core (1), stator winding (2), electric machine stand (3) and said stator winding (2) end are peripheral; And make by following steps:
Step 1, stator winding (2) is embedded in the stator coring groove according to the wire insertion technology of internal rotor external stator permanent magnet synchronous motor stator winding;
Step 2, the stator core (1) that will be embedded with stator winding (2) are made the as a whole winding dipping lacquer that carries out and are handled;
Step 3, the stator core that is embedded with stator winding (2) (1) after dipping lacquer handled are pressed in the electric machine stand (3);
Step 4, will after the soft magnetism iron powder mixing that insulation is handled, constitute uniform fluid by epoxy resin and surface;
Step 5, the casting mold that two covers are scribbled release agent are separately fixed at the place, end of the stator winding (2) that is positioned at electric machine stand (3) both sides; Between casting mold and electric machine stand (3), formed stator winding end space on every side; Above-mentioned fluid is poured in this space; The demoulding behind the curing molding is formed with soft-magnetic composite material (4) in said stator winding (2) periphery, end, promptly obtains the finished product stator of internal rotor external stator permanent magnet synchronous motor.
4. the stator of internal rotor external stator permanent magnet synchronous motor according to claim 3 is characterized in that, epoxy resin is 1: 10～10: 1 with the surface through the weight ratio of the soft magnetism iron powder of insulation processing in the said soft-magnetic composite material.
5. the stator of an external rotor internal stator permanent magnet synchronous motor is characterized in that, comprises stator core (1), the soft-magnetic composite material (4) that stator winding (2), stator core bolster (5) and said stator winding (2) end are peripheral; And make by following steps:
Step 1, stator winding (2) is embedded in the stator coring groove according to the wire insertion technology of external rotor internal stator permanent magnet synchronous motor stator winding;
Step 2, the stator core (1) that will be embedded with stator winding (2) are made the as a whole winding dipping lacquer that carries out and are handled;
Step 3, the stator core that is embedded with stator winding (2) (1) after dipping lacquer handled are pressed in the stator core bolster (5);
Step 4, will after the soft magnetism iron powder mixing that insulation is handled, constitute uniform fluid by epoxy resin and surface;
Step 5, the casting mold that two covers are scribbled release agent are separately fixed at the place, end of the stator winding (2) that is positioned at stator core bolster (5) both sides; Between casting mold and stator core bolster (5), formed stator winding end space on every side; Above-mentioned fluid is poured in this space; The demoulding behind the curing molding is formed with soft-magnetic composite material (4) in said stator winding (2) periphery, end, promptly obtains the finished product stator of external rotor internal stator permanent magnet synchronous motor.
6. the stator of external rotor internal stator permanent magnet synchronous motor according to claim 5 is characterized in that, epoxy resin is 1: 10～10: 1 with the surface through the weight ratio of the soft magnetism iron powder of insulation processing in the said soft-magnetic composite material.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210018932XA CN102594068A (en) | 2012-01-20 | 2012-01-20 | Method for widening weak magnetic speed regulating range of permanent magnet synchronous motor and stator of permanent magnet synchronous motor |
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| CN201210018932XA CN102594068A (en) | 2012-01-20 | 2012-01-20 | Method for widening weak magnetic speed regulating range of permanent magnet synchronous motor and stator of permanent magnet synchronous motor |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103855893A (en) * | 2012-12-04 | 2014-06-11 | 哈尔滨恒誉名翔科技有限公司 | Low-speed constant-torque outer-cooling type permanent magnet synchronization explosion-proof motor |
| CN104184224A (en) * | 2013-05-20 | 2014-12-03 | 现代摩比斯株式会社 | Engine with distributed winding stator |
| CN108075590A (en) * | 2016-11-10 | 2018-05-25 | 李岳翰 | The packaging structure of winding |
| CN108258878A (en) * | 2018-04-17 | 2018-07-06 | 沈阳工业大学 | A kind of wide range speed control motor weak magnetic method and system |
| CN109980872A (en) * | 2017-12-05 | 2019-07-05 | 丰田自动车株式会社 | The manufacturing method of motor stator |
| CN110098683A (en) * | 2019-06-07 | 2019-08-06 | 中车永济电机有限公司 | A kind of traction electric machine stator |
| CN112520000A (en) * | 2019-09-17 | 2021-03-19 | 西门子（中国）有限公司 | Pod type propeller and ship |
| US11368078B2 (en) | 2017-04-14 | 2022-06-21 | Carrier Corporation | Electrical machine winding inductance enhancement |
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| CN101964621A (en) * | 2009-06-24 | 2011-02-02 | 依必安-派特穆尔芬根股份有限两合公司 | Method and control system for controlling a brushless electric motor |
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| US5490319A (en) * | 1992-01-29 | 1996-02-13 | Ebara Corporation | Thermotropic liquid crystal polymer composition and insulator |
| KR20020074462A (en) * | 2000-10-25 | 2002-09-30 | 꽁세프숑 에 디벨롭프망 미쉴린, 에스. 아. | Rotary electric machine and method for making same |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103855893A (en) * | 2012-12-04 | 2014-06-11 | 哈尔滨恒誉名翔科技有限公司 | Low-speed constant-torque outer-cooling type permanent magnet synchronization explosion-proof motor |
| CN104184224A (en) * | 2013-05-20 | 2014-12-03 | 现代摩比斯株式会社 | Engine with distributed winding stator |
| CN104184224B (en) * | 2013-05-20 | 2017-06-30 | 现代摩比斯株式会社 | Engine with distributed-winding stator |
| CN108075590A (en) * | 2016-11-10 | 2018-05-25 | 李岳翰 | The packaging structure of winding |
| US11368078B2 (en) | 2017-04-14 | 2022-06-21 | Carrier Corporation | Electrical machine winding inductance enhancement |
| CN109980872A (en) * | 2017-12-05 | 2019-07-05 | 丰田自动车株式会社 | The manufacturing method of motor stator |
| CN109980872B (en) * | 2017-12-05 | 2021-04-09 | 丰田自动车株式会社 | Method for manufacturing motor stator |
| CN108258878A (en) * | 2018-04-17 | 2018-07-06 | 沈阳工业大学 | A kind of wide range speed control motor weak magnetic method and system |
| CN110098683A (en) * | 2019-06-07 | 2019-08-06 | 中车永济电机有限公司 | A kind of traction electric machine stator |
| CN112520000A (en) * | 2019-09-17 | 2021-03-19 | 西门子（中国）有限公司 | Pod type propeller and ship |
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Application publication date: 20120718 |