CN104600950B - Radial flux hybrid stepping motor - Google Patents

Radial flux hybrid stepping motor Download PDF

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Publication number
CN104600950B
CN104600950B CN201510039131.5A CN201510039131A CN104600950B CN 104600950 B CN104600950 B CN 104600950B CN 201510039131 A CN201510039131 A CN 201510039131A CN 104600950 B CN104600950 B CN 104600950B
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stator
iron core
core
permanent magnet
radial flux
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CN104600950A (en
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李鹏
王磊
郑文鹏
程远
鲁华
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CETC 21 Research Institute
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CETC 21 Research Institute
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Abstract

The invention provides a radial flux hybrid stepping motor. The radial flux hybrid stepping motor comprises a stator portion, a rotor portion, a housing, a front end cover and a rear end cover. The stator portion comprises a stator core, stator windings, a stator inner static core, a permanent magnet and a magnetic modulation ring. The rotor portion is a rotating core and small teeth are uniformly distributed on the outer periphery of the rotating core. The stator core is mounted on the inner periphery of the housing, magnetic poles are distributed on the inner periphery of the stator core, the stator winding is arranged on a pole body of every magnetic pole, and small teeth in the same pitch with that of the teeth on the rotating core are evenly distributed on pole shoes of the magnetic poles. The rotating core rotates between the stator core and the stator inner static core. One end of the stator inner static core is connected to the front end cover. The permanent magnet is mounted on the stator inner static core. The magnetic modulation ring is mounted outside the permanent magnet. The permanent magnet radially magnetizes or parallelly magnetizes. The radial flux hybrid stepping motor is reasonable in structure, low in machining difficulty, high in permanent magnet utilization rate, capable of being analyzed and optimized through two-dimensional finite element software, small in rotor rotational inertia and high in motor operation efficiency.

Description

A kind of radial flux composite stepper motor
Technical field
The present invention relates to a kind of motor, especially a kind of composite stepper motor.
Background technology
At present, motor is divided into variable reluctance stepping motor, p-m step motor and composite stepper motor.Wherein, Although variable reluctance stepping motor precision is higher, low cost of manufacture, power consumption is big, and output torque and power are little;Magneto stepping electricity Although machine small power consumption, step angle is bigger than normal, and running precision is low.By contrast, composite stepper motor combines reluctance type Motor and the advantage of p-m step motor:Small power consumption, output torque is big, and control accuracy is high, and be provided that certain from Location torque.
But still there is certain defect in configuration aspects in traditional composite stepper motor:
1., due to rotor core segmentation, stagger half rotor slot-pitch each other, placed ring in the middle of the rotor core of two ends Shape permanent-magnet steel, therefore complex structure, difficulty of processing is big.
2. permanent magnet magnetizes vertically, and stator core is formed by silicon steel plate stacking, there is not magnetic conduction between stalloy Insulating barrier, reduce stator-rotor iron core axial direction pcrmeability, thus reducing permanent magnet utilization rate.
3. do not produce effective energy converting between mechanical in permanent magnet axial range, thus reducing the torque density of motor And power density, also increase resistance and the inductance of stator winding simultaneously, increase the power consumption of motor.
4. air-gap induction axially distribution uneven, the close reduction of close two ends magnetic, the material effective rate of utilization of motor is inclined Low.
5., there is radial and axial magnetic circuit in the close complex distribution of magnetic in motor, can only be by three-dimensional finite element software pair Motor is analyzed, and increases analysis difficulty and calculating cycle, for some less motors of teeth portion size, three-dimensional finite element is soft Part even cannot carry out subdivision to it, leads to such design of electrical motor and analysis difficulty big.
Content of the invention
For solve above-mentioned technical problem, the present invention provide a kind of radial flux composite stepper motor, including stationary part, Rotor, casing, forward and backward end cap, stationary part includes stator core, stator winding, static iron core, permanent magnet and magnetic are adjusted in stator Ring processed, rotor is the rotary iron core of cup-shaped, and rotary iron core periphery is evenly distributed with little tooth, and stator core is installed on casing inner circumferential, Magnetic pole (stator canine tooth) is distributed with stator core inner circumferential, each magnetic pole pole body is placed stator winding, uniform in magnetic pole pole shoe It is distributed little tooth, tooth pitch is identical with tooth tooth pitch little on rotary iron core, is interior static iron core in rotary iron core, static iron core one in stator End is connected with drive end bearing bracket, and static iron core in stator is provided with permanent magnet, and permanent magnetism is provided with magnetic modulation ring in vitro, and permanent magnet is footpath To magnetizing or parallel magnetization, rotary iron core rotates between static iron core in stator core and stator.
Described permanent magnet is multipair pole, and it is corresponding that magnetic modulation ring is provided with multipair breach.
In described stator, static iron core and drive end bearing bracket can be formed integrally.
In described stator, the other end of static iron core is flexibly connected with rotary iron core by bearing.
Rear end cap is stretched out in described rotary iron core one end, and rotary iron core is flexibly connected by bearing with end cap.
In described stator, static iron core and magnetic modulation ring can make one, and interior static iron core is provided with groove, described permanent magnet Embed in groove for column.
It is an advantage of the current invention that:
1. simplify the structure of rotor, reduce processing and manufacturing difficulty.
2. permanent magnet is placed on static iron core in stator, and permanent magnet placement space is sufficiently large, and does not affect stator core Mechanical strength.
3. magnetic circuit and motor excitation are respectively positioned on circumferencial direction, it is to avoid conventional hybrid formula motor magnetic circuit passes through The drawbacks of laminated core, improve permanent magnet utilization rate.
4. permanent magnet is not take up the useful space of motor, improves power density, torque density and the operational efficiency of motor.
5. it is evenly distributed in the close axial direction of motor gas-gap magnetic, be favorably improved the utilization rate of stator-rotor iron core.
6. conveniently motor is analyzed design by two-dimensional FE analysis software and optimizes, greatly reduce motor Design and analysis difficulty.
7. cogging torque and the holding torque of motor can be effectively improved by increasing permanent magnet consumption.
8. rotor moment of inertia is little, motor operation efficiency high.
Brief description
Fig. 1 radial flux composite stepper motor major part exploded view;
Fig. 2 radial flux composite stepper motor sectional view;
Static core structure schematic diagram in Fig. 3 small size radial flux hybrid type stepping motor;
Fig. 4 stator punching schematic diagram;
Fig. 5 stator core, rotary iron core, permanent magnet and magnetic modulation relationship ofloops schematic diagram;
Fig. 6 multipolar dynamo permanent magnet and magnetic modulation ring distribution schematic diagram;
Description of reference numerals:
1- drive end bearing bracket;Static iron core in 2-;3- casing;4- carries winding stator core;41- stator core;42- stator around Group;5- permanent magnet;6- magnetic modulates ring;7- rotary iron core;8- rear end cap;9- bearing.
Specific embodiment
The present invention will be further described with embodiment below in conjunction with the accompanying drawings.
Taking the 2 phase 16 tooth radial flux composite stepper motor of the present invention as a example, electric machine structure as depicted in figs. 1 and 2, this Invention provides a kind of radial flux composite stepper motor, including stationary part, rotor, casing 3, forward and backward end cap 1,8, stator Static iron core 2, permanent magnet 5 and magnetic modulation ring 6 in part inclusion stator core 41, stator winding 42, stator, rotor is pivoting rail Core 7, rotary iron core 7 periphery is evenly distributed with little tooth, and stator core 41 is installed on casing inner circumferential, in the distribution of stator core 41 inner circumferential There is magnetic pole, each magnetic pole pole body is placed stator winding 42, be uniformly distributed little tooth in magnetic pole pole shoe, on tooth pitch and rotary iron core 7 Little tooth tooth pitch is identical,
It is interior static iron core 2 in rotary iron core 7, in stator, static iron core 2 one end is connected with drive end bearing bracket 1, static in stator Permanent magnet 5 is provided with iron core 2, magnetic modulation ring 6 is installed outside permanent magnet 5, permanent magnet 5 is radial magnetizing or parallel magnetization, rotation Turn iron core 7 to rotate between static iron core 2 in stator core 41 and stator.
In described stator, the other end of static iron core 2 is flexibly connected with rotary iron core 7 by bearing 9.
Rear side end cap 8 is stretched out in described rotary iron core 7 one end, and rotary iron core 7 is flexibly connected by bearing 9 with end cap 8.
The less motor for size, in described stator, static iron core 2 and magnetic modulation ring 6 can make one, interior static iron core It is provided with groove, described permanent magnet 5 embeds in groove for column.Interior static iron core 2 can be reduced to structure as shown in Figure 3, post The permanent magnet 5 of shape embedding with interior static iron core in 2.Because motor size is less, 7 need of rotary iron core pass through bearing 9 with after Side end cap 8 connects, and does not have Mechanical Contact and magnetic modulation ring 6 and permanent magnet 5 between.
Stator core 41 structure is as shown in figure 4, stator canine tooth circumferentially, is divided into a left side according to permanent magnet magnetic 5 number of poles Right two groups, each group of the little tooth of stator is completely the same.The distribution of stator canine tooth and winding mode and conventional hybrid formula stepping electricity The design rule of machine is consistent.Centrage between stator core 41 left and right sides is mutually perpendicular to permanent magnet 5 pole center line.With Line centered on the magnetic modulation upper and lower two breach midpoints of 6 rings, the centrage weight between this centrage and stator core 41 left and right sides Close.The relative position relation that stator core 41, permanent magnet 5 and magnetic modulate ring 6 is as shown in Figure 5.
As shown in fig. 6, for the thickness reducing stator core 41 yoke portion, permanent magnet 5 can also be changed into multipair pole, magnetic simultaneously Modulation ring 6 also will change according to permanent magnet pole 5 number, such as the magnetic modulation ring 6 of four-pole permanent magnet body and permanent magnet 5.

Claims (6)

1. a kind of radial flux composite stepper motor, including stationary part, rotor, casing, forward and backward end cap, stator department subpackage Include stator core, stator winding, in stator static iron core, permanent magnet and magnetic modulation ring it is characterised in that:
Rotor is the rotary iron core of cup-shaped, and rotary iron core periphery is evenly distributed with little tooth, and stator core is installed on casing inner circumferential, Stator core inner circumferential is distributed with magnetic pole, each magnetic pole pole body places stator winding, is uniformly distributed little tooth, tooth pitch in magnetic pole pole shoe Identical with tooth tooth pitch little on rotary iron core;
It is static iron core in stator in rotary iron core, in stator, static iron core one end is connected with drive end bearing bracket, static iron core in stator On permanent magnet is installed, permanent magnetism is provided with magnetic modulation ring in vitro, and permanent magnet is radial magnetizing or parallel magnetization, and rotary iron core is fixed Rotate between static iron core in sub- iron core and stator.
2. a kind of radial flux composite stepper motor as described in claim 1 it is characterised in that
Described permanent magnet is multipair pole, and it is corresponding that magnetic modulation ring is provided with multipair breach.
3. a kind of radial flux composite stepper motor as described in claim 1 it is characterised in that
In described stator, static iron core and drive end bearing bracket can be formed integrally.
4. a kind of radial flux composite stepper motor as described in claim 1 it is characterised in that
In described stator, the other end of static iron core is flexibly connected with rotary iron core by bearing.
5. a kind of radial flux composite stepper motor as described in claim 1 is it is characterised in that described rotary iron core one end Stretch out rear end cap, rotary iron core is flexibly connected by bearing with rear end cap.
6. a kind of radial flux composite stepper motor as described in claim 1 it is characterised in that
In described stator, static iron core and magnetic modulation ring can make one, and in stator, static iron core is provided with groove, described permanent magnet Embed in groove for column.
CN201510039131.5A 2015-01-27 2015-01-27 Radial flux hybrid stepping motor Active CN104600950B (en)

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CN104600950B true CN104600950B (en) 2017-02-22

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Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106341024B (en) * 2016-10-19 2018-08-14 山东大学 The orthogonal cylindrical structure two-freedom hybrid type stepping motor of robot
US11831211B2 (en) 2017-06-05 2023-11-28 E-Circuit Motors, Inc. Stator and rotor design for periodic torque requirements
KR20210083341A (en) * 2018-11-01 2021-07-06 이-서킷 모터스 인코퍼레이티드 Stator and rotor design for cyclic torque requirements
CN109347232A (en) * 2018-12-11 2019-02-15 西安航天动力测控技术研究所 A kind of composite stepper motor rotor structure
CN109525094A (en) * 2018-12-24 2019-03-26 上海鑫国动力科技有限公司 A kind of step-by-step movement magnetic gear
CN109617268B (en) * 2019-01-25 2024-04-26 广州市瑞宝电器有限公司 Stepping motor

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003284309A (en) * 2002-03-25 2003-10-03 Japan Servo Co Ltd Hybrid multi-phase stepping motor
CN101207319A (en) * 2007-11-16 2008-06-25 西北工业大学 Double redundancy composite stepper motor
JP5179462B2 (en) * 2009-11-25 2013-04-10 日本電産サーボ株式会社 Two-phase hybrid electric rotating machine and method for manufacturing the same
CN202602512U (en) * 2012-04-19 2012-12-12 常州市常华电机有限公司 Circular mixed stepping motor
JP2014099990A (en) * 2012-11-14 2014-05-29 Nippon Piston Ring Co Ltd Rotary electric machine
CN204425168U (en) * 2015-01-27 2015-06-24 中国电子科技集团公司第二十一研究所 A kind of radial flux composite stepper motor

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