CN101154862B - Brushless inner rotor of double mechanical port electric motor - Google Patents
Brushless inner rotor of double mechanical port electric motor Download PDFInfo
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- CN101154862B CN101154862B CN2007101212604A CN200710121260A CN101154862B CN 101154862 B CN101154862 B CN 101154862B CN 2007101212604 A CN2007101212604 A CN 2007101212604A CN 200710121260 A CN200710121260 A CN 200710121260A CN 101154862 B CN101154862 B CN 101154862B
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Abstract
A brushless inner rotor of a double- mechanical port is composed of an excitation body and a rotor body, wherein, the excitation body and the rotor body are concentrically arranged along the axis direction, and the excitation body is arranged on the outer side and the rotor body is arranged on the inner side; the excitation body is divided into a left excitation half-body and a right excitation half-body which are the same; each excitation half-body corresponds to a phasing current; the excitation half-body is composed of an excitation iron core (1) and an excitation loop (2); the section plane of the excitation iron core (1) is shaped like a Chinese character Ao', the sunken middle part of the excitation iron core (1) is a groove, inside which the excitation loop (2) is arranged, the protuberances at the two sides are excitation rings (7); the rotor body is divided into a left half-body and a right half-body which are the same and are arranged symmetrically and form the rotor body in a castellated manner; each rotor half-body is provided with two collecting magnetic rings and two groups of magnetic poles; one of the collecting magnetic rings and one group of the magnetic poles form the south pole of the rotor half-body, while the other collecting magnetic ring and the other group of the magnetic pole form the north pole of the rotor half-body. Ninety electrical degrees are formed between the two symmetrical rotor halfbodies.
Description
Technical field
The present invention relates to a kind of double-mechanical-port motor brushless inner rotor.
Background technology
Low in order to overcome the efficient that the single powered vehicle of internal-combustion engine system causes in the existing vehicle, problem such as exhaust emissions is serious, various motors, battery and power inverter are introduced into driver for vehicle.CN1945939 patent " double-mechanical-port motor and driving control system thereof " has provided a kind of novel motor, i.e. double-mechanical-port motor (DMPM).U.S. Pat 2004026143, the motor that WO0034066 and European patent EP 1481463 etc. relates to all has the principal character of double-mechanical-port motor, promptly has a stator and two rotors.
All be furnished with armature winding on the stator of the motor that these patents are related and one of them rotor.Outside energy enters motor by armature winding, finishes the conversion of electromechanical energy.Stator is actionless, and the armature winding that electric current enters on the stator just can be finished by simple wiring.And because rotor rotates, therefore need an equipment, system electric current from a static system transmissions to rotation.The equipment that can finish this function mainly is two kinds, and first kind is brush, collector ring combination, and another kind is exactly a resolver.
The internal rotor of the motor that relates in above-mentioned patent has adopted the brush slip rings combination without exception.Main cause just is that brush slip rings is combined in wound type asynchronous motor, extensively adopts in the motors such as separate excitation synchronous alternator, and the technology comparative maturity, and also price comparison is reasonable.Simultaneously, adopt the resolver mode to be subjected to the restriction of frequency of supply.The volume of transformer is relevant with operating frequency, and when having only the operating frequency of transformer very high, transformer just can have very compact volume.On the contrary, not only bulky when transformer is operated in low frequency, the more important thing is that efficient is very low.Owing to these reasons, the resolver scheme can not be operated under the big electric current environment of low frequency.
But the brush slip rings combination also has very serious problem.The first, brush belongs to the rapid wear consumable part, and through work after a while, brush can be needed to replenish new brush by heavy wear.The second, the brush slip rings volume ratio is bigger, is not suitable for the more restricted occasion in space.Three, between brush and collector ring, there is contact voltage drop, when the electric current that passes through is very big, can between brush slip rings, produces very big contact loss.These losses finally can become heat, not only increase the weight of motor integral heat sink burden, also may damage armature and collector ring.Four, can produce a large amount of carbon dusts in brush and the collector ring friction process, these carbon dusts need in time remove, and therefore adopt the motor of brush and collector ring to need reasonable ventilation condition.And this conflicts with requirement that double-mechanical-port motor need seal.
Summary 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 has been removed brush and collector ring, and does not adopt the resolver principle, therefore can overcome this two kinds of shortcomings that technology has.
The brushless inner rotor that the present invention proposes structurally is divided into two parts: rotor body and excitation body, these two parts are along the axis direction arranged concentric.
Rotor body is made up of the rotor half-body tooth embedding of two symmetries, the corresponding phase current of each halfbody.
Rotor half-body is made up of magnetic pole and ring concentrator, and the effect of magnetic pole is the main flux that produces in the air gap.The effect of ring concentrator is the magnetic field of accepting the autoexcitation iron core, and this magnetic field is directed to the magnetic pole place, produces main flux.Each rotor half-body has two ring concentrators and two groups of magnetic poles.One of them ring concentrator and one group of magnetic pole constitute the South Pole of this rotor half-body, and another ring concentrator and one group of magnetic pole constitute the arctic of this rotor half-body.Spatially differ 90 electrical degrees between the rotor half-body of two symmetries.
The excitation body is made up of two identical excitation halfbodies, the corresponding phase current of each halfbody.Different with general motor, brushless inner rotor armature supply of the present invention is a two-phase alternating current, and the electric current in each halfbody differs 90 electrical degrees in time.Two-phase differs the magnetic field that the alternating current of 90 electrical degrees produces on the time, the ring concentrator by two rotor half-body is directed on the magnetic pole that differs 90 electrical degrees on the space and can synthesizes rotating magnetic field.
The excitation halfbody is made up of excitation iron core and excitation coil.Excitation coil is concentric coiling, and the benefit of bringing thus is that coil winding is convenient, and it is also convenient to roll off the production line.The excitation iron core is the annulus of " concave character type " for the cross section.
Brushless inner rotor of the present invention is structurally fully different with existing internal rotor.Existing internal rotor is made up of rotor core, rotor winding, armature spindle and the collector ring and the brush that are installed on the axle.Brushless inner rotor of the present invention is made of excitation body and rotor body two parts.On function, the excitation body of non-brushing of the present invention is equivalent to the armature winding of existing internal rotor, and rotor body is equivalent to the rotor core of existing internal rotor.But structurally then different fully: the armature winding on the existing internal rotor is installed in the rotor core, and the excitation body of the brushless inner rotor that the present invention proposes is independent parts.The rotor core of existing internal rotor is to be overrided to form by punching, and monnolithic case simple rule, the rotor body of brushless inner rotor of the present invention are to be formed the monnolithic case complexity by the embedding of two rotor half-body teeth.
The brushless inner rotor that the present invention proposes is compared with existing double-mechanical-port motor internal rotor has many-sided advantage:
1, existing internal rotor adopts brush and collector ring power supply owing to there is friction between the two, therefore brush still be collector ring all be easily worn part, need to regularly replace, increased the maintenance cost of the vehicle that loads this New-type electric machine.Simultaneously, this friction can bring a large amount of heats, not only can threaten the reliable use of brush and collector ring more to make whole system have a potential potential safety hazard.Brushless inner rotor of the present invention adopts non-contact power supply, has completely abolished this friction, makes it is excitation body or rotor body can in use not wear and tear, and greatly reduces maintenance cost like this.Simultaneously, because the disappearance of frictional force, because the safety problem that friction brings has also been eliminated together.
2, the brush and the collector ring of existing internal rotor have taken big quantity space, adopt brushless inner rotor can save this part space, thereby have reduced the weight and volume of whole system.
3, the winding of existing internal rotor is installed on the rotor body, and therefore epitrochanterian loss comprises the copper loss that iron loss and winding produce.Because loss is on rotor, it is very difficult to dispel the heat.The winding of the brushless inner rotor that the present invention proposes is transferred to stationary part to the copper loss that is produced by winding on the rotor on static excitation body, reduced the difficulty of heat radiation.
Description of drawings
Fig. 1 is a brushless inner rotor part explosive view of the present invention, and among the figure: 1 excitation is unshakable in one's determination, 2 excitation coils, 3 interior ring concentrators, 6 outer ring concentrators, 4 outer magnetic poles, 5 internal magnetic poles;
Fig. 2 is a brushless inner rotor installation diagram of the present invention;
Fig. 3 is a brushless inner rotor halfbody structural representation of the present invention;
Fig. 4 is a brushless inner rotor excitation halfbody structural representation of the present invention.
Embodiment
Further specify the present invention below in conjunction with the drawings and specific embodiments.
As shown in Figure 1, brushless inner rotor of the present invention is made of excitation body and rotor body, and rotor body and excitation body be along the axis direction arranged concentric, the excitation body in the outside, rotor body is in the inboard.Two identical excitation halfbodies about the excitation body is divided into, each excitation halfbody is made of excitation unshakable in one's determination 1 and excitation coil 2.Encourage 1 section unshakable in one's determination to be concave character type, intermediate recess partly is a groove, and the projection of both sides is an excitation rings 7.Place excitation coil 2, excitation coil 2 concentric coilings in the groove.Pass to alternating current in the excitation coil 2, at the excitation unshakable in one's determination 1 inner alternating magnetic field that produces.In order to reduce eddy current loss, therefore lamination is made in excitation unshakable in one's determination 1.
After feeding alternating current in the excitation coil 2, according to Ampere's law, the magnetic field of generation is the magnetic field around excitation coil 2, and therefore two excitation rings 7 of excitation unshakable in one's determination 1 have formed the South Pole and the arctic in magnetic field that this phase current produces respectively.
Two identical halfbodies about rotor body is divided into, two halfbody symmetric arrangement, rotor is formed in the tooth embedding.Each halfbody is formed 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 all are three-dimensional circle shape parts with excitation rings 7, and circular end face is all arranged.The circular end face of interior ring concentrator 3 is installed in opposite directions with the interior ring end face of excitation rings 7 is concentric, and the circular end face of outer ring concentrator 6 is installed in opposite directions with the outer shroud end face of excitation rings 7 is concentric.On the outer ring concentrator 6 outer magnetic pole 4 is installed, on the interior ring concentrator 3 internal magnetic pole 5 is installed.360 electrical degrees of being separated by between the adjacent pole on the same ring concentrator differ 180 electrical degrees between the magnetic pole on magnetic pole and the outer ring concentrator on each adjacent interior ring concentrator.The effect of ring concentrator mainly contains two, and first, " collection " from the magnetic flux that the excitation coil on the excitation rings 2 produces, and finishes " brushless " transmission of armature energy.The second, being directed on outer magnetic pole 4 and the internal magnetic pole 5 from the magnetic field on the excitation rings 7.
Each magnetic pole of rotor half-body installation of staggering differs 90 electrical degrees between the magnetic pole on each adjacent rotors halfbody.
Figure 2 shows that brushless inner rotor installation diagram of the present invention, two symmetrical fully rotor half-body adopt the mode of tooth embedding to be staggeredly arranged.Wherein, a series of outer magnetic pole 4 and internal magnetic pole 5 are all arranged on each rotor half-body.
Brushless inner rotor halfbody of the present invention shown in Figure 3.As shown in Figure 3, each rotor half-body is made of interior ring concentrator 3, outer ring concentrator 6, internal magnetic pole 5 and outer magnetic pole 4.On the ring concentrator 3, outer magnetic pole 4 was installed on the outer ring concentrator 6 in internal magnetic pole 5 was installed in.Differ 180 electrical degrees between adjacent internal magnetic pole 5 and the outer magnetic pole 4, constitute the South Pole and the arctic of this rotor half-body respectively.
Figure 4 shows that brushless inner rotor excitation halfbody structure of the present invention.The excitation halfbody is the armature portion of internal rotor.The cross section of excitation unshakable in one's determination 1 is concave character type, and middle sunk part is a groove, imbeds excitation coil 2 in the groove; The projection on concave character type both sides is excitation rings 7, and the magnetic field that is produced by excitation coil 2 forms south poles in two ends of excitation rings 7.
The operation principle of brushless inner rotor of the present invention is: two excitation coils differ the alternating current of 90 degree on 2 feeding times, and alternating current produces the alternating magnetic field of two time phase difference 90 electrical degrees in excitation unshakable in one's determination 1.Excitation rings 7 and the interior ring concentrator 3 of this alternating magnetic fields by arranging in opposite directions face-to-face, outer ring concentrator 6 imports rotor body into from the excitation body, finishes " non-brushing " transmission of energy.And because excitation rings 7 and interior ring concentrator 3, outer ring concentrator 6 all is three-dimensional circular object, and therefore " brushless " of this energy transmission is not subjected to the influence of rotor body rotation.Alternating magnetic field imports in the outer magnetic pole 4 from outer ring concentrator 3, because from spatially differing 90 electrical degrees between the adjacent pole of two rotor half-body, and the alternating magnetic field on each magnetic pole differs 90 electrical degrees in time, therefore will synthesize the magnetic field of a rotation, this rotating magnetic field is finally finished the Conversion of energy function of motor.
From the operation principle of brushless inner rotor of the present invention as can be seen, the same in the rotor body with excitation unshakable in one's determination 1, there is alternating magnetic field, so, need makes lamination to rotor body in order to overcome iron loss.But the brushless rotor structure more complicated that the present invention proposes is different from the relative simple structure of general motor stator and rotor, uses the laminating method manufacturing to have difficulties.
Make the problem of difficulty in order to overcome brushless rotor above-mentioned, the present invention adopts " composite magnetic " (SMC) to cast above-mentioned brushless inner rotor.SMC is a kind of novel soft magnetic material, is Powdered.Compare with the soft magnetic material silicon steel sheet that conventional motors adopts, this material has very unique characteristics.This material is Powdered, can by with the mixing of adhesive, adopt the method for casting, make object with complex three-dimensional forms.And silicon steel sheet only is fit to adopt the method that laminates to make the simple object of profile.Because brushless inner rotor of the present invention has very complicated profile, therefore adopt the method manufacturing of casting with this material.
The rotor brushless method that the present invention proposes both had been different from the conductivity method of brush slip rings combination based on the magnetic transmission method, also was different from the electromagnetic induction method of resolver.Therefore the contact resistance that had both overcome the conductivity method causes the shortcoming of contact loss, has also overcome the shortcoming of the inefficiency of electromagnetic induction method.
Claims (4)
1. the brushless inner rotor of a double-mechanical-port motor is characterized in that, brushless inner rotor is made of excitation body and rotor body, and rotor body and excitation body be along the axis direction arranged concentric, the excitation body in the outside, rotor body is in the inboard; Two identical excitation halfbodies about the excitation body is divided into, the corresponding phase current of each excitation halfbody; The excitation halfbody is made of excitation (1) unshakable in one's determination and excitation coil (2); Excitation (1) section unshakable in one's determination is concave character type, and intermediate recess partly is a groove, and the projection of both sides is excitation rings (7), places excitation coil (2) in the groove, excitation coil (2) coiling with one heart; Excitation (1) unshakable in one's determination is a lamination; Two identical halfbodies about rotor body is divided into, the tooth embedding is formed; The corresponding phase current of each halfbody, two halfbody symmetric arrangement, each halfbody is formed 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 rings (7), the circular end face of interior ring concentrator (3) is installed in opposite directions with the interior ring end face of excitation rings (7) is concentric, and the circular end face of outer ring concentrator (6) is installed in opposite directions with the outer shroud end face of excitation rings (7) is concentric; Outer magnetic pole (4) is installed on the outer ring concentrator (6), internal magnetic pole (5) is installed on the 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), around excitation coil (2) alternating magnetic field, two rings of excitation rings (7) have formed the South Pole and the arctic in magnetic field that this phase current produces respectively in the inner generation of excitation (1) unshakable in one's determination.
3. the brushless inner rotor of double-mechanical-port motor according to claim 1 is characterized in that, on each adjacent interior ring concentrator of rotor half-body on magnetic pole and the outer ring concentrator magnetic pole constitute the South Pole and the arctic of this rotor half-body respectively; Differ 180 electrical degrees between the magnetic pole on magnetic pole and the outer ring concentrator on each adjacent interior ring concentrator, 360 electrical degrees of being separated by between the adjacent pole on the same ring concentrator spatially differ 90 electrical degrees between the rotor half-body of two symmetries.
4. the brushless inner rotor of double-mechanical-port motor according to claim 1 is characterized in that, brushless inner rotor adopts the composite magnetic casting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101212604A CN101154862B (en) | 2007-09-03 | 2007-09-03 | Brushless inner rotor of double mechanical port electric motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101212604A CN101154862B (en) | 2007-09-03 | 2007-09-03 | Brushless inner rotor of double mechanical port electric motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101154862A CN101154862A (en) | 2008-04-02 |
| CN101154862B true CN101154862B (en) | 2010-09-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101212604A Expired - Fee Related CN101154862B (en) | 2007-09-03 | 2007-09-03 | Brushless inner rotor of double mechanical port electric motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101154862B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1166719A (en) * | 1996-04-08 | 1997-12-03 | 佳能株式会社 | Motor and advancing device |
| CN1233103A (en) * | 1998-04-20 | 1999-10-27 | 佳能株式会社 | Motor |
| CN1945939A (en) * | 2005-12-27 | 2007-04-11 | 中国科学院电工研究所 | Double mechanical port motor and its driving control system |
-
2007
- 2007-09-03 CN CN2007101212604A patent/CN101154862B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1166719A (en) * | 1996-04-08 | 1997-12-03 | 佳能株式会社 | Motor and advancing device |
| CN1233103A (en) * | 1998-04-20 | 1999-10-27 | 佳能株式会社 | Motor |
| CN1945939A (en) * | 2005-12-27 | 2007-04-11 | 中国科学院电工研究所 | Double mechanical port motor and its driving control system |
Non-Patent Citations (1)
| Title |
|---|
| JP特开平10-225088A 1998.08.21 |
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| CN101154862A (en) | 2008-04-02 |
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