CN203289210U - A mixed excitation-type stator surface mounting-type double-salient-pole motor - Google Patents

A mixed excitation-type stator surface mounting-type double-salient-pole motor Download PDF

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Publication number
CN203289210U
CN203289210U CN201320265308XU CN201320265308U CN203289210U CN 203289210 U CN203289210 U CN 203289210U CN 201320265308X U CN201320265308X U CN 201320265308XU CN 201320265308 U CN201320265308 U CN 201320265308U CN 203289210 U CN203289210 U CN 203289210U
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China
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stator
permanent magnet
magnetic
rotor
winding
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Expired - Fee Related
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CN201320265308XU
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Chinese (zh)
Inventor
花为
张淦
施铭
程明
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Southeast University
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Southeast University
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Abstract

Provided is a mixed excitation-type stator surface mounting-type double-salient-pole motor adopting a modularized stator. A stator portion employs a centralized-type armature winding and a centralized-type excitation winding. Stator teeth are divided into two groups. One group is stator teeth pasted with permanent magnets and the other group is stator teeth sleeved with armature winding coils. The armature teeth and the permanent magnet teeth are distributed alternatively. The permanent magnets magnetized alternatively in radial directions are separately pasted and installed on the surface, facing the rotor, of the stator permanent magnet teeth. Each coil of the armature winding is respectively sleeved on one stator armature tooth. Each coil of the centralized excitation winding is respectively sleeved on one stator permanent magnet tooth. The mixed excitation-type stator surface mounting-type double-salient-pole motor of the utility model keeps the advantages such as being compact in structure and being liable to heat radiation of stator surface mounting-type double-salient-pole permanent magnet motors in terms of structure. A function of mixed excitation can be realized without the extra adding of the size of the motor. The motor is guaranteed to have relatively strong torque output capability and a relatively high power density. The mixed excitation-type stator surface mounting-type double-salient-pole motor is especially suitable for occasions with requirements for a small sized motor and a large force. Functions of a large torque of a constant torque zone and a wide speed regulation range of a constant power zone can be realized.

Description

A kind of composite excitation type stator surface mounted doubly salient pole motor
Technical field
The utility model is a kind of armature coil linkage bipolarity permanent magnetism magnetic linkage, and the permanent magnet utilance is high, the doubly-salient brushless motor of employing Modular rotor, and especially a kind of motor with composite excitation function, belong to the technical field that motor is made.
Background technology
Continuous aggravation along with energy crisis; adopt permanent magnet excitation to replace electric excitation and become global common recognition to save energy resource consumption; simultaneously because China is the abundantest country of rare earth resources in the world; developmental research and apply the rare-earth permanent-magnet electric machine of new structure, have important theory significance and practical value.The present hybrid vehicle of broad research particularly, require that wherein motor driven systems volume is little, lightweight, efficiency is high, reliability is strong, and non-maintaining, torque is exerted oneself greatly, speed-regulating range width.Yet,, due to the bottleneck that magneto self exists air-gap field to regulate, limited its application in hybrid vehicle.The unloaded permanent magnetism magnetic linkage of most magnetoes is all greater than the product of d-axis inductance and rated current, magneto is a pair of contradiction that can't be in harmonious proportion between the highest running speed of the breakdown torque of Heng Zhuanjuqu and Heng Gongshuaiqu: on the one hand, increase the breakdown torque fan-out capability that the permanent magnetism magnetic linkage no doubt can improve motor, high-speed cruising (due to the unloaded back electromotive force that constantly increases) that simultaneously can limiting motor; On the other hand,, reduce the permanent magnetism magnetic linkage and be conducive to improve the output-constant operation scope of motor but can exert oneself by torque-limiting fixedly the time when the d-axis inductance of the electric current limit of inverter and motor.Therefore, the shortcoming of above-mentioned magneto has become to limit the bottleneck of its application.And the mixed excitation electric machine major part take rotor permanent magnet type motor as prototype that occurs is at present all placed stator with the DC excitation winding.No matter in order to provide one to be the path that radially or axially walks abreast with permanent magnet flux to electro-magnetic flux, the electric machine structure that proposes is all very complicated, no matter, from manufacturing process or finished products large-scale production, all face huge challenge.If the motor of composite excitation type needs to make great sacrifice for the adjusting that realizes magnetic field from structure complexity, its competitiveness will be had a greatly reduced quality.
On the other hand, the stator permanent magnetic type electric of three kinds of new structures the nineties appearred in eighties of last century in the world successively, be flux pulsation magneto, flux switch permanent magnet motor and flux-reversal magneto, its structure general character is for all to be placed in stator with permanent magnet and armature winding, and rotor only is comprised of soft magnetic materials such as silicon steel sheets.Wherein, the structural principle of magnetic flux reverse motor is that two opposite polarity permanent magnets are installed side by side on each salient pole stator tooth, its objective is in order to obtain ambipolar permanent magnetism magnetic linkage, but this structure directly causes two blocks of magnet steel and stator tooth to form short circuit, leakage field is serious, has reduced the utilance of unit magnet steel.And in traditional stator surface-mount type motor, the armature magnetic linkage is unipolarity to be changed, reduced the utilance of permanent magnet, and the utility model is just on stator surface-mounted permanent magnet machine architecture basics, proposed a kind of composite excitation type stator surface mounted doubly brushless electric machine of Modular rotor, tried hard to not do material alteration on maintenance pure permanent-magnetic electric machine basis and can realize the composite excitation function.
Summary of the invention
The purpose of this utility model is the composite excitation type stator surface mounted doubly salient pole brushless electric machine that proposes a kind of Modular rotor, but this motor reasonable arrangement electricity excitation winding space, can further improve the power density of motor under the volume conditions that does not additionally increase former pure permanent magnet-type motor, improve in all directions properties by the flexible to electric exciting current and armature supply simultaneously, comprise the high efficiency in breakdown torque, the highest running speed of permanent power and whole service district scope.
The technical solution adopted in the utility model is:
A kind of composite excitation type stator surface mounted doubly salient pole motor of Modular rotor, this motor comprises: stator, concentrate armature winding, rotor magnetic conductive iron, permanent magnet, single-phase central excitation winding and every magnetic mechanism; It is characterized in that: described stator core and rotor core are salient-pole structure; Stator tooth is divided into two groups, is respectively that permanent magnetism tooth and the cover that posts permanent magnet has the armature tooth of armature winding coil, and described armature tooth and permanent magnetism tooth are alternately distributed; Described each coil of concentrated armature winding is enclosed within respectively on a stator armature tooth; Described permanent magnet is mounted on respectively the surface of a stator permanent magnet flank of tooth to rotor, and each permanent magnet is radial magnetizing, and the magnetizing direction of adjacent two permanent magnets is opposite; Each coil of described central excitation winding is enclosed within respectively on a stator excitation tooth, and each magnet exciting coil series connection becomes single-phase excitation winding; Described rotor is by U-shaped magnetic conduction rotor core and every magnetic mechanism, form, and each U-shaped magnetic conduction rotor core is embedded in respectively in magnetic mechanism; Described rotor U-shaped magnetic conductive iron can link together by connecting bridge between unit, and because connecting bridge internal magnetic field height is saturated, magnetic resistance is larger, can effectively prevent leakage field.
Described stator core and rotor magnetic conductive iron are salient-pole structure, and described stator comprises stator core, centralized armature winding, permanent magnet and centralized excitation winding, and described rotor comprises U-shaped rotor magnetic conductive iron and every magnetic mechanism.
Excitation winding passes into sense of current difference, electro-magnetic flux is identical with the permanent magnet flux direction or opposite, wherein, when passing into the exciting current that increases magnetic property, the permanent magnet flux direction that the permanent magnet that mounts under the electro-magnetic flux that each magnet exciting coil produces and its place stator permanent magnet tooth produces is identical, and electric excitation is to increasing magnetic action; When passing into the exciting current of degaussing character, the permanent magnet flux opposite direction that the permanent magnet that mounts under the electro-magnetic flux that each magnet exciting coil produces and its place stator permanent magnet tooth produces, electric excitation is to demagnetizing effect.
Form between the armature winding coil of a phase and have the winding complementarity, the armature induction electromotive force is sine wave or square wave.
Coordinate according to specific rotor teeth groove, each coil of described centralized armature winding can connect into single-phase or the polyphase armature winding; Described centralized armature winding can adopt the form of distributed winding.
Described each permanent magnet is radial magnetizing, and the magnetizing direction of adjacent two permanent magnets is opposite; Described permanent magnet is the permanent magnetic material of ferrite or neodymium iron boron.
Described rotor core can connect into by connecting bridge as a whole.
Rotor core and be positioned at the outside of stator every magnetic mechanism, become outer-rotor structure.
The material of described stator core, rotor core and connecting bridge is the permeability magnetic material of silicon steel sheet.
Described material every magnetic mechanism is the non-magnet_conductible material of copper, aluminium.
Described motor can be used as generator or motor operation.
On the other hand, the characteristics that present the double-salient-pole structure due to this electric machine rotor, make this composite excitation type stator surface mounted doubly brushless electric machine can more easily obtain to be in close proximity to trapezoidal wave or the static characteristics such as sinusoidal wave permanent magnetism magnetic linkage, unloaded induced potential, in addition, also can pass through the rotor chute certain angle, obtain more sinusoidal back electromotive force, make the utility model be suitable for Alternating Current Governor System element as the brushless ac type of drive.
In addition, the characteristics on this electric machine structure cause its unloaded air gap flux density larger, and motor has stronger torque fan-out capability, and power density is higher; Simultaneously, armature winding and excitation winding are all to concentrate winding, and end is short, and resistance is less, and efficiency is higher.
The beneficial effect that the technical solution of the utility model is obtained;
1, due in motor of the present utility model, centralized armature winding, centralized excitation winding and permanent magnet all are positioned at stator side, and the cooling condition while being conducive to improve the motor operation, be convenient to motor radiating;
2, the utility model motor has kept traditional double salient pole machine rotor and has been the characteristic of salient-pole structure, can coordinate by different rotor teeth groove, be easier to obtain near square wave or sinusoidal wave every phase winding induced potential waveform, control mode is comparatively flexible, adapts to different AC speed regulating and servo-drive occasion;
3, the electric excitation winding of cover that increases of the utility model motor need not to increase under the condition of motor volume and can lay;
4, in the flux-reversal doubly salient permanent magnet motor, post two permanent magnets that magnetizing direction is opposite under each stator tooth, between permanent magnet, leakage field is comparatively serious, and only post a permanent magnetism in the utility model motor on each stator permanent magnet tooth, significantly weaken the permanent magnet leakage field, improved the permanent magnet utilance;
5, be compared to traditional stator surface mounted doubly salient pole permanent magnet motor, adopt Modular rotor in this invention motor, and only have under the stator tooth of half number and post permanent magnet, the permanent magnet flux of each coil linkage of armature winding is bipolarity, has higher permanent magnet utilance;
6, armature and the excitation winding due to the utility model motor all adopts centralized winding, so winding overhang is shorter, is conducive to improve electric efficiency and reduces manufacturing cost.
Description of drawings
Fig. 1 is the transverse sectional view of the utility model motor.
Fig. 2 is the transverse sectional view that the utility model motor adds connecting bridge.
Fig. 3 is the utility model machine operation schematic diagram;
Fig. 4 is the A phase armature winding single turn magnetic linkage oscillogram of the utility model motor under the different exciting operating mode;
Fig. 5 is the A phase armature winding single turn induced potential oscillogram of the utility model motor under the different exciting operating mode;
Reference numeral: the 1-stator core, the centralized armature winding of 2-, the 3-rotor core, 4-permanent magnet, 5-central excitation winding, 6-be every magnetic mechanism, the 7-connecting bridge.
Embodiment
Below with reference to accompanying drawings the utility model is described.
As shown in Figure 1, the utility model discloses a kind of composite excitation type stator surface mounted doubly salient pole motor of Modular rotor, comprise stator core 1, three-phase set Chinese style armature winding 2, rotor core 3, permanent magnet 4, single-phase centralized excitation winding 5 and every magnetic mechanism 6.The composite excitation type stator surface mounted doubly salient pole motor of employing Modular rotor of the present utility model comprises stator and two parts of rotor, according to different application scenarios, can take internal rotor or two kinds of forms of external rotor.Described stator core 1 and rotor core 3 are all salient-pole structure, are provided with centralized armature winding 2, permanent magnet 4 and centralized excitation winding 5 on stator 1.Described stator tooth is divided into two groups, is respectively the stator tooth (being called armature tooth) that the stator tooth (being called the permanent magnetism tooth) that posts permanent magnet and cover have armature coil, and armature tooth and permanent magnetism tooth are alternately distributed.Described permanent magnet is radial magnetizing, each permanent magnet is mounted on respectively the surface of a stator permanent magnet flank of tooth to rotor, and the magnetizing direction of adjacent two permanent magnets is opposite, if be permanent magnet polarity distribution N-S under first stator permanent magnet tooth, the permanent magnet polarity that separates after an armature tooth under adjacent with it stator permanent magnet tooth is S-N, is interspersed in stator surface successively.The material of described permanent magnet is other permanent magnetic materials such as ferrite or neodymium iron boron.Described rotor is by U-shaped rotor core 3 and every magnetic mechanism 6, form, and the lower end of each U-shaped magnetic conductive iron is embedded in respectively in magnetic mechanism, rotor portion both without permanent magnet also without winding.Described rotor core 3 is the permeability magnetic materials such as silicon steel sheet, and described can be the non-magnet_conductible materials such as copper, aluminium every magnetic mechanism.
Each coil of three-phase set Chinese style armature winding 2 is enclosed within respectively on a stator armature tooth, by coil 201 and coil 204 series connection, becomes A phase armature winding; Become B phase armature winding by coil 202, coil 205 series connection; Become C phase armature winding by coil 203 and coil 206 series connection.With the rotor rotation, the magnetic linkage that meeting linkage bipolarity changes in each coil of armature winding, and then the induced electromotive force of generation alternation.
Centralized excitation winding 5 one has six concentrating coils, is placed in respectively on six stator permanent magnet teeth.Wherein the first excitation winding pole coil 501, the second excitation winding pole coil 502, the 3rd excitation winding pole coil 503, the 4th excitation winding pole coil 504, the 5th excitation winding pole coil 505, the 6th excitation winding pole coil 506 are centralized coil and are connected in series, and form single-phase excitation winding.Therefore, be distributed with 5 two coils of armature winding 2 and excitation winding circle limit separately in each stator slot.Need to prove, in the utility model motor, only post a permanent magnet under each stator permanent magnet tooth, and the armature magnetic linkage is bipolarity and changes, make the permanent magnet utilance be significantly higher than flux-reversal doubly salient permanent magnet motor and traditional stator surface mounted doubly magneto.
By U-shaped rotor core 3 with every the rotor that magnetic mechanism 6 forms, can be the straight trough rotor, have guaranteed that the utility model motor can obtain to be in close proximity to trapezoidal wave or the static characteristics such as the sinusoidal wave every phase permanent magnetism magnetic linkage that distributes and unloaded induced potential.In addition, also can obtain more sinusoidal armature induction electromotive force to the rotor chute certain angle, make the control mode of the utility model motor comparatively flexible, adapt to different AC speed regulating and servo-drive occasion.
As shown in Figure 2, can link together by connecting bridge 7 between the described rotor U-iron heart 3, make electric machine rotor iron core become as a whole.Described connecting bridge 7 internal magnetic field height are saturated, make the magnetic permeability of connecting bridge near air, can significantly weaken leakage field, make connecting bridge without the magnetic conduction effect, only play the effect that the U-shaped magnetic conductive iron of rotor unit is connected as one.
Fig. 3 A and Fig. 3 B are the fundamental diagram of the utility model motor.By 3A and Fig. 3 B as seen, rotor-position shown in the figure, after the exciting current that excitation winding is passed into, when the permanent-magnet magnetic chain direction that the permanent magnet that mounts under the excitation flux linkage that each magnet exciting coil produces and its place permanent magnetism tooth produces is identical, this moment, electricity excitation magnetic field played the effect that strengthens permanent magnet excitation magnetic field, and then increased excitation flux linkage and the induced electromotive force of linkage in armature winding, be the electric excitation flux linkage that increases magnetic property; And after the sense of current of change excitation winding, the permanent-magnet magnetic chain direction that the permanent magnet that mounts under the excitation flux linkage that each magnet exciting coil produces and its place permanent magnetism tooth produces is opposite, electricity excitation magnetic field plays the effect that weakens permanent magnet excitation magnetic field, and then reduced excitation flux linkage and the induced electromotive force of linkage in armature winding, be the electric excitation flux linkage of degaussing character.Pass into sense of current and the size of excitation winding by change, can play the effect of regulating excitation field, this is the composite excitation principle.Magnetizing direction 4-1, permanent magnetism magnetic linkage 8, increase magnetic property electricity excitation flux linkage 9, degaussing character electricity excitation flux linkage 10.When in Fig. 3 A, electric excitation winding passes into the electric current that increases magnetic property, the permanent magnet flux direction that the permanent magnet that mounts on the electro-magnetic flux that each centralized magnet exciting coil produces and place stator permanent magnet tooth produces is identical, this moment, electricity excitation magnetic field strengthened permanent magnetic field, change the exciting current direction in Fig. 3 B, the permanent magnet flux opposite direction that the permanent magnet that mounts on the electro-magnetic flux of each centralized magnet exciting coil generation and place stator permanent magnet tooth produces, this moment, electricity excitation magnetic field weakened permanent magnetic field.
Fig. 4 and Fig. 5 are respectively A phase armature winding at pure permanent magnetism (being pure permanent magnet excitation), increase unloaded single turn magnetic linkage waveform and induced potential waveform under magnetic (namely increasing magnetic property electricity excitation and permanent magnet excitation acting in conjunction) and three kinds of excitation operating modes of degaussing (being the electric excitation of degaussing character and permanent magnet excitation acting in conjunction).Along with excitation winding passes into sense of current difference, electro-magnetic flux is identical with the permanent magnet excitation flow direction or opposite, plays respectively and strengthens excitation field (namely increasing magnetic) or weaken excitation field (being degaussing) effect.
The foregoing is only preferred embodiments of the present utility model; protection range of the present utility model is not limited with above-mentioned execution mode;, as long as the equivalence that those of ordinary skills do according to the utility model institute disclosure is modified or changed, all should include in the protection range of putting down in writing in claims.

Claims (11)

1. the composite excitation type stator surface mounted doubly salient pole motor of a Modular rotor, this motor comprises: stator (1), concentrate armature winding (2), rotor magnetic conductive iron (3), permanent magnet (4), single-phase central excitation winding (5) and every magnetic mechanism (6); It is characterized in that: described stator core (1) and rotor core (3) are salient-pole structure; Stator tooth is divided into two groups, is respectively that permanent magnetism tooth and the cover that posts permanent magnet has the armature tooth of armature winding coil, and described armature tooth and permanent magnetism tooth are alternately distributed; Each coil of described concentrated armature winding (2) is enclosed within respectively on a stator armature tooth; Described permanent magnet (4) is mounted on respectively the surface of a stator permanent magnet flank of tooth to rotor, and each permanent magnet is radial magnetizing, and the magnetizing direction of adjacent two permanent magnets is opposite; Each coil of described central excitation winding (5) is enclosed within respectively on a stator excitation tooth, and each magnet exciting coil series connection becomes single-phase excitation winding; Described rotor forms by U-shaped magnetic conduction rotor core (3) with every magnetic mechanism (6), and each U-shaped magnetic conduction rotor core (3) is embedded in respectively in magnetic mechanism (6); Can link together by connecting bridge (7) between described rotor U-shaped magnetic conductive iron unit, because connecting bridge (7) internal magnetic field height is saturated, magnetic resistance is larger, can effectively prevent leakage field.
2. composite excitation type stator surface mounted doubly salient pole motor according to claim 1, it is characterized in that, described stator core (1) and rotor magnetic conductive iron (3) are salient-pole structure, described stator comprises stator core (1), centralized armature winding (2), permanent magnet (4) and centralized excitation winding (5), and described rotor comprises U-shaped rotor magnetic conductive iron (3) and every magnetic mechanism (6).
3. composite excitation type stator surface mounted doubly salient pole motor according to claim 1, it is characterized in that, excitation winding passes into sense of current difference, electro-magnetic flux is identical with the permanent magnet flux direction or opposite, wherein, when passing into the exciting current that increases magnetic property, the permanent magnet flux direction that the permanent magnet that mounts under the electro-magnetic flux that each magnet exciting coil produces and its place stator permanent magnet tooth produces is identical, and electric excitation is to increasing magnetic action; When passing into the exciting current of degaussing character, the permanent magnet flux opposite direction that the permanent magnet that mounts under the electro-magnetic flux that each magnet exciting coil produces and its place stator permanent magnet tooth produces, electric excitation is to demagnetizing effect.
4. composite excitation type stator surface mounted doubly salient pole motor according to claim 1, is characterized in that, has the winding complementarity between the armature winding coil of composition one phase, and the armature induction electromotive force is sine wave or square wave.
5. composite excitation type stator surface mounted doubly salient pole motor according to claim 1, is characterized in that, according to specific rotor teeth groove, coordinates, and each coil of described centralized armature winding (2) can connect into single-phase or the polyphase armature winding; Described centralized armature winding (2) can adopt the form of distributed winding.
6. composite excitation type stator surface mounted doubly salient pole motor according to claim 1, is characterized in that, described each permanent magnet (4) is radial magnetizing, and the magnetizing direction of adjacent two permanent magnets is opposite; Described permanent magnet (4) is the permanent magnetic material of ferrite or neodymium iron boron.
7. composite excitation type stator surface mounted doubly salient pole motor according to claim 1, is characterized in that, described rotor core (3) can connect into as a whole by connecting bridge (7).
8. composite excitation type stator surface mounted doubly salient pole motor according to claim 1, is characterized in that, rotor core (3) and be positioned at the outside of stator (1) every magnetic mechanism (6) becomes outer-rotor structure.
9. according to claim 1-8 described composite excitation type stator surface mounted doubly salient pole of any one motors, is characterized in that, the material of described stator core (1), rotor core (3) and connecting bridge (7) is the permeability magnetic material of silicon steel sheet.
10. according to claim 1-8 described composite excitation type stator surface mounted doubly salient pole of any one motors, is characterized in that, described material every magnetic mechanism (6) is the non-magnet_conductible material of copper, aluminium.
11. according to claim 1-8 described composite excitation type stator surface mounted doubly salient pole of any one motors, is characterized in that, described motor can be used as generator or motor operation.
CN201320265308XU 2013-05-15 2013-05-15 A mixed excitation-type stator surface mounting-type double-salient-pole motor Expired - Fee Related CN203289210U (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103248148A (en) * 2013-05-15 2013-08-14 东南大学 Mixed excitation stator surface-mounted double-salient motor
CN105871092A (en) * 2015-02-09 2016-08-17 株式会社岛野 Generator
CN106655562A (en) * 2017-03-20 2017-05-10 山东理工大学 Electric sliding plate driving permanent magnet motor
CN106655551A (en) * 2017-01-14 2017-05-10 山东理工大学 Electro-magnetic wheel hub motor of electric self-balancing vehicle
CN110048573A (en) * 2019-04-04 2019-07-23 南京航空航天大学 A kind of bimorph transducer electric excitation biconvex electrode electric machine that loss of excitation is fault-tolerant and its method
CN113410927A (en) * 2021-05-24 2021-09-17 东南大学 Modularized motor with interphase magnetic isolation capability

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103248148A (en) * 2013-05-15 2013-08-14 东南大学 Mixed excitation stator surface-mounted double-salient motor
CN105871092A (en) * 2015-02-09 2016-08-17 株式会社岛野 Generator
CN105871092B (en) * 2015-02-09 2019-07-05 株式会社岛野 Generator
CN106655551A (en) * 2017-01-14 2017-05-10 山东理工大学 Electro-magnetic wheel hub motor of electric self-balancing vehicle
CN106655551B (en) * 2017-01-14 2019-01-15 山东理工大学 A kind of body-sensing vehicle electrical excitation hub motor
CN106655562A (en) * 2017-03-20 2017-05-10 山东理工大学 Electric sliding plate driving permanent magnet motor
CN110048573A (en) * 2019-04-04 2019-07-23 南京航空航天大学 A kind of bimorph transducer electric excitation biconvex electrode electric machine that loss of excitation is fault-tolerant and its method
CN113410927A (en) * 2021-05-24 2021-09-17 东南大学 Modularized motor with interphase magnetic isolation capability

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