CN103746476A - External rotor three-phase motor - Google Patents

External rotor three-phase motor Download PDF

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Publication number
CN103746476A
CN103746476A CN201310718845.XA CN201310718845A CN103746476A CN 103746476 A CN103746476 A CN 103746476A CN 201310718845 A CN201310718845 A CN 201310718845A CN 103746476 A CN103746476 A CN 103746476A
Authority
CN
China
Prior art keywords
stator
winding
rotor
stator core
rotating shaft
Prior art date
Application number
CN201310718845.XA
Other languages
Chinese (zh)
Inventor
韦青松
徐永文
Original Assignee
合肥凯邦电机有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 合肥凯邦电机有限公司 filed Critical 合肥凯邦电机有限公司
Priority to CN201310718845.XA priority Critical patent/CN103746476A/en
Publication of CN103746476A publication Critical patent/CN103746476A/en

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Abstract

The invention relates to the motor filed, especially to an external rotor three-phase motor comprising a stator, a rotor, a rotating shaft, and a case fixed outside the rotor. The rotor is sleeved outside the stator; bearings are arranged at the journal, arranged in a through hole of the stator, of the rotating shaft; and the case is fixedly connected to one end, far away from the stator, of the rotating shaft. The stator includes a stator iron core and a stator winding. The stator iron core is an integrated circular ring formed by head-to-tail connection of arc-shaped unit segments with identical curvatures; a stator slot is arranged at the outer side periphery of the stator iron core; and the portion from the bottom of the stator slot to the inner hole wall of the stator iron core forms a yoke portion. And the stator winding includes an A-phase winding, a B-phase winding, and a C-phase winding; and the three phases of windings are arranged according to the three-phase motor winding and wind around the yoke portion of the stator iron core. According to the invention, compared with the accommodation of wire embedding structure-based windings, the more windings with more turn numbers can be accommodated by the stator slot with the same size; the coils winding around the yoke portion of the stator iron core become compact and thus the space occupation rate of the stator slot is obviously improved, thereby reducing the motor size.

Description

External rotor three phase electric machine

Technical field

The present invention relates to machine field, particularly external rotor three phase electric machine.

Background technology

The stator winding of existing external rotor three phase electric machine is first copper cash to be coiled into a branch of elliptoid coil, then coil is embedded in stator slot.The two rectangular limits that form a wire loop are positioned at different stator slots, that is to say that a wire loop needs two stator slots to store, and coil can not be full of stator slot, only in stator slot, reserve space and can carry out rule, relatively loose between coil so, cause the space availability ratio of groove low, the size of stator slot is large, finally causes motor volume to increase.And in three phase electric machine, place four, interval stator slot between two stator slots of a wire loop, and a large amount of coils overhang on two axial ends of stator core, cause raw-material waste, and production cost is high.Also have, be mostly to adopt manual wire embedding at present, very high to the requirement of workman's level, workload is large, and production efficiency is very low.

Summary of the invention

The space utilization that the object of this invention is to provide a kind of stator core slot is high, the external rotor three phase electric machine that production efficiency is high.

For achieving the above object, the present invention has adopted following technical scheme: a kind of external rotor three phase electric machine, comprise stator and rotor, rotating shaft and be fixed on the casing of rotor exterior, rotor empty set is in the outside of stator, the middle part of stator is provided with the through hole passing through for rotating shaft, rotating shaft is placed on the axle journal in stator through hole and is provided with bearing, rotating shaft is away from the affixed casing in one end of stator, described stator comprises stator core and stator winding, described stator core is by the identical circular arc elementary section complete circle that head and the tail connect and compose each other of curvature, in the outer periphery of stator core, offer stator slot, the bottom land of stator slot to stator core inner hole wall forms yoke portion, stator winding comprises A phase winding, B phase winding and C phase winding, described A phase winding, B phase winding and C phase winding press that three phase electric machine winding is arranged and winding in the yoke portion of stator core.

Owing to adopting above technical scheme, a wire loop of stator winding only has one side to be positioned at stator slot, another side abuts on the inner hole wall of stator core, also just say that a wire loop only needs a stator slot to store, the number of turn that the turn ratio that can hold winding in onesize stator slot is held rule structure winding is many, and comparatively compact around the coil of stator core yoke portion, the space hold rate of stator slot to obviously promoting, reduce stator volume, namely reduced motor volume.And the stator of this structure saves manual wire embedding's operation, reduce the amount of labour, operating efficiency is significantly improved.

Accompanying drawing explanation

Fig. 1 is structural representation of the present invention;

Fig. 2 is the front view of stator;

Fig. 3 is the left cutaway view of Fig. 2;

Fig. 4 is the structural representation of circular arc elementary section;

Fig. 5 is the structural representation of circular arc elementary section fit on retaining frame.

Embodiment

As described in Fig. 1-3, a kind of external rotor three phase electric machine, comprise stator 10 and rotor 20, rotating shaft 30 and the casing 40 that is fixed on rotor exterior, rotor 20 empty sets are in the outside of stator 10, the middle part of stator 10 is provided with the through hole passing through for rotating shaft 30, rotating shaft 30 is placed on the axle journal in stator 10 through holes and is provided with bearing 31, rotating shaft 30 is away from the affixed casing 40 in one end of stator 10, described stator 10 comprises stator core 11 and stator winding 12, described stator core 11 is by the identical circular arc elementary section 11A complete circle that head and the tail connect and compose each other of curvature, in the outer periphery of stator core 11, offer stator slot 112, the bottom land of stator slot 112 to stator core 11 inner hole walls form yoke portion 111, stator winding 12 comprises A phase winding 121, B phase winding 122 and C phase winding 123, described A phase winding 121, B phase winding 122 and C phase winding 123 press that three phase electric machine winding is arranged and winding in the yoke portion 111 of stator core 11.Relative position Rankine-Hugoniot relations between A phase winding 121, B phase winding 122 and C phase winding 123 adopts existing three-phase motor stator winding arrangement mode.Give an example, by adjacent two stator slots 112 as one group, that is to say that adjacent two stator slots 112 are interior arranges A phase winding 121 simultaneously or B phase winding 122 is set simultaneously or C phase winding 123 is set simultaneously, and A phase winding 121, B phase winding 122 and C phase winding 123 intervals arrange, as shown in Figure 2.The position relationship of A phase winding 121, B phase winding 122 and C phase winding 123 and stator core 11 is that equal winding is in the yoke portion 111 of stator core 11.

Described stator core 11 is along the circumferential direction spliced successively by two or more circular arc elementary section 11A, between circular arc elementary section 11A, is provided with fastening unit.The stator core 11 of split-type structural is more prone to realize machine coiling, utilizes existing coil winding machine just can complete winding process.The yoke portion 111 of stator core 11 refers to the bottom land of stator slot 112 and the position between stator core 11 inner hole walls, and enamelled wire outwards forms stator winding 12 successively from stator slot 112 inside in yoke portion 111.A wire loop of stator winding 12 only has a limit to be positioned at stator slot 112, another side abuts on the inner hole wall of stator core 11, also just say that a wire loop only needs a stator slot 112 to store, the number of turn that the turn ratio that onesize stator core 11 can hold winding is held rule structure winding is many, and comparatively compact around the coil of stator core yoke portion 111, arriving obviously of the space hold rate of stator slot promotes.Guaranteeing, under the prerequisite that power of motor is constant, can to reduce the degree of depth of stator slot 112, namely reduced stator diameter, thereby reach the object that reduces motor volume, and the stator of this structure saves manual wire embedding's operation, reduce the amount of labour, operating efficiency is significantly improved.And a wire loop is in same stator slot 112, the enamelled wire that avoids waste, saves raw material, reduces production costs.Described stator core 11 is spliced by the circular arc elementary section 11A of two semi-circular structure, one end that circular arc elementary section 11A along the circumferential direction goes up is provided with raised line 113, the other end is provided with the groove 114 identical with raised line 113, described raised line 113 is placed in the groove 114 of adjacent circular arc elementary section 11A, and the raised line 113 of engaging and groove 114 form fastening unit mutually.The stator core 11 of two halves formula also guarantees the intensity of iron core when being convenient to coiling, two circular arc elementary section 11A are buckled into a completely circular structure, and the time processing moulding in punching lamination of raised line 113 and groove 114, without secondary operations.

Described stator core 11 outer wrap have retaining frame 13, round-corner transition between the axial end of described retaining frame 13 and periphery.Stator core 11 is to be formed by stacking by some punchings; its yoke portion edge is comparatively sharp; directly the words of coiling easily injure enamelled wire; the relatively soft retaining frame 13 of sheathed quality in yoke portion 111; can avoid damaging enamelled wire; guarantee product quality, the retaining frame 13 in the present invention can be adopted protective sleeve made of plastic.

Described casing 40 is step tubulose, and its Large Diameter Pipeline portion fixed cover is located on external rotor 20, and little straight tube footpath portion is sheathed to be fixed on the axle body that rotating shaft 30 is positioned at stator 10 outsides.

Described stator core 11 and stator winding 12 outsides are injected with insulation crust 14.

Described rotor 20 is cage rotor.

The stator core 11 of the good winding 12 of coiling is put into plastic packaging machine and carry out plastic packaging, become an integrally-built stator 10, can effectively prevent from misplacing between circular arc elementary section 11A, separated etc.

Claims (6)

1. an external rotor three phase electric machine, comprise stator (10) and rotor (20), rotating shaft (30) and be fixed on the casing (40) of rotor exterior, it is characterized in that: rotor (20) empty set is in the outside of stator (10), the middle part of stator (10) is provided with the through hole passing through for rotating shaft (30), rotating shaft (30) is placed on the axle journal in stator (10) through hole and is provided with bearing (31), rotating shaft (30) is away from the affixed casing in one end (40) of stator (10), described stator (10) comprises stator core (11) and stator winding (12), described stator core (11) is by identical circular arc elementary section (11A) complete circle that head and the tail connect and compose each other of curvature, in the outer periphery of stator core (11), offer stator slot (112), the bottom land of stator slot (112) to stator core (11) inner hole wall forms yoke portion (111), stator winding (12) comprises A phase winding (121), B phase winding (122) and C phase winding (123), described A phase winding (121), B phase winding (122) and C phase winding (123) press that three phase electric machine winding is arranged and winding in the yoke portion (111) of stator core (11).
2. external rotor three phase electric machine according to claim 1, it is characterized in that: described stator core (11) is spliced by the circular arc elementary section (11A) of two semi-circular structure, one end that circular arc elementary section (11A) is along the circumferential direction gone up is provided with raised line (113), the other end is provided with the groove (114) identical with raised line (113), and described raised line (113) is placed in the groove (114) of adjacent circular arc elementary section (11A).
3. external rotor three phase electric machine according to claim 1, is characterized in that: described stator core (11) outer wrap has retaining frame (13), round-corner transition between the axial end of described retaining frame (13) and periphery.
4. external rotor three phase electric machine according to claim 1, it is characterized in that: described casing (40) is step tubulose, it is upper that its Large Diameter Pipeline portion fixed cover is located at external rotor (20), and little straight tube footpath portion is sheathed to be fixed on rotating shaft (30) and to be positioned on the outside axle body of stator (10).
5. according to the external rotor three phase electric machine described in claim 2 or 3, it is characterized in that: described stator core (11) and stator winding (12) outside are injected with insulation crust (14).
6. external rotor three phase electric machine according to claim 1, is characterized in that: described rotor (20) is cage rotor.
CN201310718845.XA 2013-12-20 2013-12-20 External rotor three-phase motor CN103746476A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310718845.XA CN103746476A (en) 2013-12-20 2013-12-20 External rotor three-phase motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310718845.XA CN103746476A (en) 2013-12-20 2013-12-20 External rotor three-phase motor

Publications (1)

Publication Number Publication Date
CN103746476A true CN103746476A (en) 2014-04-23

Family

ID=50503479

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201310718845.XA CN103746476A (en) 2013-12-20 2013-12-20 External rotor three-phase motor

Country Status (1)

Country Link
CN (1) CN103746476A (en)

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1247403A (en) * 1998-09-08 2000-03-15 东芝株式会社 Motor and mfg. method thereof
JP2000134832A (en) * 1998-10-28 2000-05-12 Toshiba Corp Motor stator
CN2541991Y (en) * 2002-04-30 2003-03-26 青岛和力达电气有限公司 Outer rotor wheelhead dynamo
CN1838509A (en) * 2005-03-24 2006-09-27 株式会社一宫电机 Rotating machine
JP2006271142A (en) * 2005-03-25 2006-10-05 Ichinomiya Denki:Kk Rotary machine
CN1913283A (en) * 2005-08-12 2007-02-14 三洋电机株式会社 Electromotor for washing machine and washing machine having the electric motor
CN1921261A (en) * 2005-08-22 2007-02-28 乐金电子(天津)电器有限公司 Stator insulation protection holder for single-phase asynchronous plastic packaging motor
JP2007189841A (en) * 2006-01-13 2007-07-26 Ichinomiya Denki:Kk Brushless motor
CN101322303A (en) * 2006-04-20 2008-12-10 松下电器产业株式会社 Motor
CN102255454A (en) * 2011-06-28 2011-11-23 无锡锡山特种风机有限公司 Explosive-proof type three-phase asynchronous outer-rotor motor
CN202160058U (en) * 2011-07-11 2012-03-07 杭州富宁电器有限公司 Three-phase servo external rotor motor
CN102498645A (en) * 2009-08-06 2012-06-13 松下电器产业株式会社 Synchronous motor and system for driving synchronous motor
CN202918072U (en) * 2012-10-31 2013-05-01 中山大洋电机制造有限公司 Novel stator assembly and external rotor motor using the same
CN203617798U (en) * 2013-12-20 2014-05-28 合肥凯邦电机有限公司 External rotor three-phase electric machine

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1247403A (en) * 1998-09-08 2000-03-15 东芝株式会社 Motor and mfg. method thereof
JP2000134832A (en) * 1998-10-28 2000-05-12 Toshiba Corp Motor stator
CN2541991Y (en) * 2002-04-30 2003-03-26 青岛和力达电气有限公司 Outer rotor wheelhead dynamo
CN1838509A (en) * 2005-03-24 2006-09-27 株式会社一宫电机 Rotating machine
JP2006271142A (en) * 2005-03-25 2006-10-05 Ichinomiya Denki:Kk Rotary machine
CN1913283A (en) * 2005-08-12 2007-02-14 三洋电机株式会社 Electromotor for washing machine and washing machine having the electric motor
CN1921261A (en) * 2005-08-22 2007-02-28 乐金电子(天津)电器有限公司 Stator insulation protection holder for single-phase asynchronous plastic packaging motor
JP2007189841A (en) * 2006-01-13 2007-07-26 Ichinomiya Denki:Kk Brushless motor
CN101322303A (en) * 2006-04-20 2008-12-10 松下电器产业株式会社 Motor
CN102498645A (en) * 2009-08-06 2012-06-13 松下电器产业株式会社 Synchronous motor and system for driving synchronous motor
CN102255454A (en) * 2011-06-28 2011-11-23 无锡锡山特种风机有限公司 Explosive-proof type three-phase asynchronous outer-rotor motor
CN202160058U (en) * 2011-07-11 2012-03-07 杭州富宁电器有限公司 Three-phase servo external rotor motor
CN202918072U (en) * 2012-10-31 2013-05-01 中山大洋电机制造有限公司 Novel stator assembly and external rotor motor using the same
CN203617798U (en) * 2013-12-20 2014-05-28 合肥凯邦电机有限公司 External rotor three-phase electric machine

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Application publication date: 20140423