CN106712337A - Brushless inner rotor of double-mechanical-port motor - Google Patents
Brushless inner rotor of double-mechanical-port motor Download PDFInfo
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- CN106712337A CN106712337A CN201510775504.5A CN201510775504A CN106712337A CN 106712337 A CN106712337 A CN 106712337A CN 201510775504 A CN201510775504 A CN 201510775504A CN 106712337 A CN106712337 A CN 106712337A
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- excitation
- rotor
- magnetic pole
- ring concentrator
- ring
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
- H02K2201/15—Sectional machines
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Brushless Motors (AREA)
Abstract
The invention relates to a brushless inner rotor of a double-mechanical-port motor. The brushless inner rotor is formed by an excitation body and a rotor body. The rotor body and the excitation body are arranged concentrically along an axis direction, the excitation body is at an outer side, and the rotor body is at an inner side. The excitation body is divided into left and right same excitation half bodies, and each excitation half body is corresponding to one phase of current. The excitation half body is formed by an excitation core (1) and an excitation coil (2). The profile of the excitation core (1) is a U shape, a central concave part is a groove, projections at two sides are excitation rings (7), and the excitation coil (2) is placed in the groove. The rotor body is divided into left and right same half bodies which are symmetrically arranged and are embedded to form a rotor. Each rotor body has two ferromagnetic ring concentrators and two groups of magnetic poles, wherein the south pole of the rotor half body is formed by one ferromagnetic ring concentrator and one group of magnetic poles, and the north pole of the half body is formed by the other ferromagnetic ring concentrator and the other group of magnetic poles. The two symmetrical rotor half bodies have a difference of 90 electrical angles in the space.
Description
Technical field
The present invention relates to a kind of double-mechanical-port motor brushless inner rotor.
Background technology
In order to overcome, existing internal combustion engine in vehicle system is single to drive the problems such as efficiency that causes of vehicle is low, and exhaust emissions is serious, and various motors, battery and power inverter are introduced into driver for vehicle.CN1945939 patents《Double-mechanical-port motor and its driving control system》Give a kind of new motor, i.e. double-mechanical-port motor (DMPM).The motor that United States Patent (USP) US2004026143, WO0034066 and European patent EP 1481463 etc. are related to all principal characters with double-mechanical-port motor, i.e., with a stator and two rotors.
Armature winding is all disposed with the stator of the motor involved by these patents and one of rotor.Outside energy enters motor by armature winding, completes the conversion of electromechanical energy.Stator is actionless, and the armature winding that electric current enters on stator can just be completed by simple wiring.And because rotor is to rotate, it is therefore desirable to there is an equipment, electric current from a static system transfers to the system of rotation.The equipment that this function can be completed is mainly two kinds, and the first is brush, collector ring combination, and another kind is exactly rotary transformer.
The internal rotor of the motor being related in above-mentioned patent employs brush slip rings combination without exception.Main cause is that brush slip rings are combined in wound type asynchronous motor, and widely used in the motor such as separate excitation synchronous alternator, Technical comparing is ripe, and price is more reasonable.Meanwhile, limited by frequency of supply using rotary transformer mode.The volume of transformer is relevant with working frequency, and when the working frequency of only transformer is very high, transformer can just have volume closely.Conversely, not only bulky when transformer is operated in low frequency, it is often more important that efficiency is very low.For these reasons, rotary transformer scheme can not be operated under low frequency high current environment.
But, brush slip rings combination also has very serious problem.Firstth, brush belongs to rapid wear consumable part, and through working after a while, brush can be by heavy wear, it is necessary to supplement new brush.Secondth, brush slip rings volume ratio is larger, is not suitable for space than more limited occasion.3rd, there is contact drop between brush and collector ring, very big contact loss can be produced between brush slip rings when the electric current for passing through is very big.These losses eventually become heat, not only aggravate motor integral heat sink burden, it is also possible to damage armature and collector ring.4th, substantial amounts of carbon dust can be produced in brush and collector ring friction process, these carbon dusts need to remove in time, therefore using the relatively good ventilation condition of the motor needs of brush and collector ring.And this needs the requirement of sealing to conflict with double-mechanical-port motor.
The content of the invention
In order to overcome the shortcoming of prior art.The present invention proposes a kind of new brushless inner rotor.This internal rotor eliminates brush and collector ring, and does not use rotary transformer principle, therefore both technologies can be overcome to have the disadvantage that.
Brushless inner rotor proposed by the present invention is divided into two parts in structure：Rotor body and excitation body, the two parts arranged concentric in the axial direction.
Rotor body is made up of two symmetrical rotor half-body dental inlays, each halfbody one phase current of correspondence.
Rotor half-body is made up of magnetic pole and ring concentrator, and the effect of magnetic pole is to produce the main flux in air gap.The effect of ring concentrator is to receive to come autoexcitation magnetic field unshakable in one's determination, and this magnetic field is directed at magnetic pole, produces main flux.Each rotor half-body has two ring concentrators and two groups of magnetic poles.One of ring concentrator and one group of magnetic pole constitute the South Pole of the rotor half-body, and another ring concentrator and one group of magnetic pole constitute the arctic of the rotor half-body.90 electrical angles are spatially differed between two symmetrical rotor half-bodies.
Excitation body encourages halfbody to constitute by two identicals, each halfbody one phase current of correspondence.Different from general motor, brushless inner rotor armature supply of the present invention is two-phase alternating current, and the electric current in each halfbody differs 90 electrical angles in time.The magnetic field that the alternating current of 90 electrical angles is produced is differed on the two-phase time, being directed to by the ring concentrator of two rotor half-bodies can synthesize rotating excitation field on the magnetic pole for spatially differing 90 electrical angles.
Excitation halfbody is unshakable in one's determination by excitation and excitation coil is constituted.Excitation coil is concentric coiling, and some advantages that arise therefrom is convenient coil winding, offline also more to facilitate.Excitation is unshakable in one's determination for section is the annulus of " concave character type ".
Brushless inner rotor of the invention and existing internal rotor are entirely different in structure.Existing internal rotor is made up of rotor core, rotor windings, armature spindle and the collector ring being mounted on an axle and brush.Brushless inner rotor of the present invention is made up of excitation body and rotor body two parts.Functionally, the armature winding of the excitation body equivalent to existing internal rotor of non-brushing of the present invention, rotor core of the rotor body equivalent to existing internal rotor.But it is then entirely different in structure：Armature winding on existing internal rotor is arranged in rotor core, and the excitation body of brushless inner rotor proposed by the present invention is single part.The rotor core of existing internal rotor is overrided to form by punching, monnolithic case simple rule, and the rotor body of brushless inner rotor of the present invention is formed by two rotor half-body dental inlays, and monnolithic case is complicated.
Brushless inner rotor proposed by the present invention has many advantages compared with existing double-mechanical-port motor internal rotor：
1. existing internal rotor is powered using brush and collector ring, and due to there is friction between both, therefore brush or collector ring are all easily worn parts, it is necessary to regularly replace, and increased the maintenance cost of the vehicle for loading this New-type electric machine.Meanwhile, this friction can bring substantial amounts of heat, can not only threaten brush and reliable use of collector ring whole system is there is a potential potential safety hazard.Brushless inner rotor of the invention uses non-contact power supply, has completely abolished this friction so that either encourage body or rotor body all without wearing and tearing in use, so greatly reduce maintenance cost.Simultaneously as the disappearance of frictional force, because the safety problem that friction belt is come also is eliminated together.
2. the brush and collector ring of existing internal rotor occupy big quantity space, and this segment space can be saved using brushless inner rotor, so as to reduce the weight and volume of whole system.
3. the winding of existing internal rotor is arranged on rotor body, therefore loss on rotor includes the copper loss of iron loss and winding generation.Due to being lost on rotor, radiate very difficult.The copper loss produced by winding on rotor is transferred to stationary part by the winding of brushless inner rotor proposed by the present invention on static excitation body, reduces the difficulty of radiating.
Brief description of the drawings
Fig. 1 is brushless inner rotor part explosive view of the present invention, in figure：1 excitation is unshakable in one's determination, 2 excitation coils, ring concentrator in 3,6 outer ring concentrators, 4 outer magnetic poles, 5 internal magnetic poles；
Fig. 2 is brushless inner rotor installation diagram of the present invention；
Fig. 3 is brushless inner rotor halfbody structural representation of the invention；
Fig. 4 is brushless inner rotor excitation halfbody structural representation of the invention.
Specific embodiment
The present invention is further illustrated below in conjunction with the drawings and specific embodiments.
As shown in figure 1, brushless inner rotor of the present invention is made up of excitation body and rotor body, rotor body and excitation body arranged concentric in the axial direction, excitation body is in outside, rotor body in inner side.Excitation body is divided into the identical excitation halfbody of left and right two, and each excitation halfbody is made up of excitation unshakable in one's determination 1 and excitation coil 2.1 section unshakable in one's determination is encouraged in concave character type, intermediate recessed portions are groove, and the projection of both sides is excitation ring 7.Excitation coil 2, the concentric coiling of excitation coil 2 are placed in groove.Alternating current is passed in excitation coil 2, alternating magnetic field is produced inside excitation unshakable in one's determination 1.In order to reduce eddy-current loss, therefore lamination is made in excitation unshakable in one's determination 1.
After alternating current is passed through in excitation coil 2, according to Ampere's law, the magnetic field of generation is the magnetic field for surrounding excitation coil 2, therefore encourages unshakable in one's determination 1 two south and north poles for encouraging rings 7 to form respectively magnetic field produced by the phase current.
Rotor body is divided into the two identical halfbodies in left and right, and two halfbodies are arranged symmetrically, dental inlay composition rotor.Each halfbody is constituted by outer ring concentrator 6, interior ring concentrator 3, outer magnetic pole 4 and internal magnetic pole 5.Interior ring concentrator 3, outer ring concentrator 6 and excitation ring 7 are all three-dimensional circle shape parts, there is the end face of annular shape.The circular end face of interior ring concentrator 3 is concentric with the inner ring end face of excitation ring 7 to be installed in opposite directions, and the circular end face of outer ring concentrator 6 is concentric with the outer shroud end face of excitation ring 7 to be installed in opposite directions.Outer magnetic pole 4 is installed on outer ring concentrator 6, internal magnetic pole 5 is installed on interior ring concentrator 3.It is separated by 360 electrical angles between adjacent pole on same ring concentrator, 180 electrical angles is differed between each adjacent interior ring concentrator upper magnetic pole and outer ring concentrator upper magnetic pole.The effect of ring concentrator mainly has two, and first, the magnetic flux that produces of " collection " excitation coil 2 for coming on autoexcitation ring, complete " brushless " transmission of armature energy.Secondth, the magnetic field come on autoexcitation ring 7 is directed on outer magnetic pole 4 and internal magnetic pole 5.
Each magnetic pole of rotor half-body staggers installation, and 90 electrical angles are differed between the magnetic pole in each adjacent rotor half-body.
Fig. 2 show brushless inner rotor installation diagram of the present invention, and two full symmetric rotor half-bodies are staggeredly arranged by the way of dental inlay.Wherein, there are a series of outer magnetic pole 4 and internal magnetic pole 5 in each rotor half-body.
Brushless inner rotor halfbody of the invention shown in Fig. 3.As shown in figure 3, each rotor half-body is made up of interior ring concentrator 3, outer ring concentrator 6, internal magnetic pole 5 and outer magnetic pole 4.Internal magnetic pole 5 is arranged on interior ring concentrator 3, and outer magnetic pole 4 is installed on outer ring concentrator 6.180 electrical angles are differed between adjacent internal magnetic pole 5 and outer magnetic pole 4, the south and north poles of this rotor half-body are respectively constituted.
Fig. 4 show brushless inner rotor excitation halfbody structure of the invention.Excitation halfbody is the armature portion of internal rotor.The cross section of excitation unshakable in one's determination 1 is in concave character type, and middle sunk part is groove, and excitation coil 2 is imbedded in groove；The projection on concave character type both sides is excitation ring 7, and the magnetic field produced by excitation coil 2 forms south poles in two ends of excitation ring 7.
The operation principle of brushless inner rotor of the present invention is：Two excitation coils 2 are passed through on the time alternating current for differing 90 degree, and alternating current produces two alternating magnetic fields of the electrical angle of time phase difference 90 in excitation unshakable in one's determination 1.Excitation ring 7 and interior ring concentrator 3 that the magnetic field of this alternation passes through opposite arrangement face-to-face, outer ring concentrator 6 complete " non-brushing " transmission of energy from the excitation incoming rotor body of body.It is additionally, since excitation ring 7 and interior ring concentrator 3, outer ring concentrator 6 is all three-dimensional annular shape object, therefore " brushless " transmission of this energy is not influenceed by rotor body rotation.Alternating magnetic field imported into outer magnetic pole 4 from outer ring concentrator 3, due to from spatially differing 90 electrical angles between two adjacent poles of rotor half-body, and the alternating magnetic field on each magnetic pole differs 90 electrical angles in time, therefore a magnetic field for rotation will be synthesized, this rotating excitation field is finally completed the energy transformation function of motor.
From the operation principle of brushless inner rotor of the present invention can be seen that rotor body in as excitation unshakable in one's determination 1, there is alternating magnetic field, therefore in order to overcome iron loss, it is necessary to rotor body is made lamination.But, brushless rotor structure proposed by the present invention is more complicated, different from general motor stator and the relatively simple structure of rotor, is manufactured using laminating method and had difficulties.
For the problem for overcoming brushless rotor manufacture above-mentioned difficult, the present invention casts above-mentioned brushless inner rotor using " composite magnetic " (SMC).SMC is a kind of new soft magnetic materials, in powdered.With conventional motors use soft magnetic materials silicon steel sheet compared with, this material have it is very unique the characteristics of.This material, using the method for casting, can be made the object with complex three-dimensional forms in powdered by the mixing with adhesive.And silicon steel sheet is only suitable for using the method manufacture simple object of profile for laminating.Because brushless inner rotor of the present invention has sufficiently complex profile, therefore manufactured using the method for casting with this material.
Rotor brushless method proposed by the present invention is based on magnetic transmission method, both different from the fax guiding method of brush slip rings combination, also different from the electromagnetic induction method of rotary transformer.Therefore the contact resistance for both having overcome fax guiding method causes the shortcoming of contact loss, also overcomes the shortcoming of the inefficiency of electromagnetic induction method.
Claims (4)
1. a kind of brushless inner rotor of double-mechanical-port motor, it is characterised in that brushless inner rotor is made up of excitation body and rotor body, rotor body and excitation body arranged concentric in the axial direction, excitation body is in outside, rotor body in inner side；Excitation body is divided into the identical excitation halfbody of left and right two, each excitation halfbody one phase current of correspondence；Excitation halfbody is made up of excitation (1) unshakable in one's determination and excitation coil (2)；Excitation (1) section unshakable in one's determination is in concave character type, and intermediate recessed portions are groove, and the projection of both sides is excitation ring (7), and excitation coil (2), excitation coil (2) coiling with one heart are placed in groove；Excitation (1) unshakable in one's determination is lamination；Rotor body is divided into the two identical halfbodies in left and right, dental inlay composition；Each halfbody one phase current of correspondence, two halfbodies are arranged symmetrically, and each halfbody is constituted by outer ring concentrator 6, interior ring concentrator 3, outer magnetic pole 4 and internal magnetic pole 5；
Interior ring concentrator 3, outer ring concentrator 6 are three-dimensional circle shape part with excitation ring 7, and the circular end face of interior ring concentrator 3 is concentric with the inner ring end face of excitation ring 7 to be installed in opposite directions, and the circular end face of outer ring concentrator 6 is concentric with the outer shroud end face of excitation ring 7 to be installed in opposite directions；
Outer magnetic pole 4 is installed on outer ring concentrator 6, internal magnetic pole 5 is installed on interior ring concentrator 3.
2. the brushless inner rotor of double-mechanical-port motor according to claim 1, it is characterized in that, excitation coil passes to alternating current in (2), produced inside excitation (1) unshakable in one's determination around excitation coil (2) alternating magnetic field, two excitations ring (7) of excitation (1) unshakable in one's determination form respectively the south and north poles in magnetic field produced by the phase current.
3. the brushless inner rotor of double-mechanical-port motor according to claim 1, it is characterised in that rotor half-body each adjacent interior ring concentrator upper magnetic pole respectively constitutes the south and north poles of this rotor half-body with outer ring concentrator upper magnetic pole；180 electrical angles are differed between each adjacent interior ring concentrator upper magnetic pole and outer ring concentrator upper magnetic pole, 360 electrical angles are separated by between the adjacent pole on same ring concentrator, 90 electrical angles are spatially differed between two symmetrical rotor half-bodies.
4. the brushless inner rotor of double-mechanical-port motor according to claim 1, it is characterised in that brushless inner rotor is cast using composite magnetic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510775504.5A CN106712337A (en) | 2015-11-15 | 2015-11-15 | Brushless inner rotor of double-mechanical-port motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510775504.5A CN106712337A (en) | 2015-11-15 | 2015-11-15 | Brushless inner rotor of double-mechanical-port motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106712337A true CN106712337A (en) | 2017-05-24 |
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ID=58931460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510775504.5A Withdrawn CN106712337A (en) | 2015-11-15 | 2015-11-15 | Brushless inner rotor of double-mechanical-port motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106712337A (en) |
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2015
- 2015-11-15 CN CN201510775504.5A patent/CN106712337A/en not_active Withdrawn
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Legal Events
| Date | Code | Title | Description |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20170524 |
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| WW01 | Invention patent application withdrawn after publication |