CN1783670A - Method for changing magnetic leakage of magnetoresistance motor and its gear slot bias magnetic magnetoresistance motor - Google Patents
Method for changing magnetic leakage of magnetoresistance motor and its gear slot bias magnetic magnetoresistance motor Download PDFInfo
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- CN1783670A CN1783670A CN 200410061296 CN200410061296A CN1783670A CN 1783670 A CN1783670 A CN 1783670A CN 200410061296 CN200410061296 CN 200410061296 CN 200410061296 A CN200410061296 A CN 200410061296A CN 1783670 A CN1783670 A CN 1783670A
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- magnetic
- teeth groove
- reluctance motor
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- leakage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K19/00—Synchronous motors or generators
- H02K19/02—Synchronous motors
- H02K19/10—Synchronous motors for multi-phase current
- H02K19/103—Motors having windings on the stator and a variable reluctance soft-iron rotor without windings
-
- 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
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/17—Stator cores with permanent magnets
-
- 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
- H02K1/223—Rotor cores with windings and permanent magnets
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Synchronous Machinery (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
This invention relates to a method for altering leakage of reluctance machine and its tooth slot bias reluctance machine characterizing in putting a magnet with corresponding linearity of the charge polarity and the flux direction in a tooth slot always at one way flux of primary magnetic path of an excitation winding and the magnet can alter the leakage when the teeth and slot of the stator and the rotor are aligned, the charge polarity of the magnet in the same or opposite directions with the excitation flux of the primary magnetic path can be selected to increase or reduce leakage flux or negative.
Description
Technical field:
The invention belongs to dynamo-electric field, particularly a kind of method and teeth groove magnetic biasing type reluctance motor thereof that changes the reluctance motor leakage field.
Background technology:
Reluctance motor and common electric machine structure are basic identical, also include stator, rotor and shell, and the rotor that difference is reluctance motor utilizes the excitation winding that is installed on the magnetic pole of the stator to produce magnetic field normally not with magnetic, rotor is produced suction, drive rotor rotation.Because rotor is not with magnetic, passively by the stator field effect, so between stator and rotor, can only produce pulling force and do not produce repulsion, since be simple magnetic pull, just only there is large and small amount poor, and do not have positive and negative difference, leakage field just becomes unavoidably.By contrast, the existing pulling force of the interaction between the brshless DC motor stator and rotor has thrust again, and the drive current of forward and reverse conducting is symmetrical to the effect of rotor, thereby the curve of transition changes of magnetic field is preferably arranged, and leakage field is seldom between stator and rotor.The leakage field problem of reluctance motor does not all find effective solution for a long time, causes the power density of reluctance motor to be difficult to improve.
Switched reluctance machines is by improving design speed, and the way that reduces the rotor number of teeth reduces leakage field, is only applicable to limit its application scenario at a high speed.Can derive from Theory of Electromagnetic Field: motor unit volume moment, under the constant situation of other condition, be directly proportional with the flux change amount, be inversely proportional to the motor step elongation.Owing to the leakage field reason, the rotor number of teeth greater than some after, along with the increase of the rotor number of teeth, its leakage field also is doubled and redoubled, and causes the reduction of the reduction of magnetic flux amplitude and step angle suitable, output torque can not increase with the increase of the number of teeth.
Main magnetic circuit magnetic biasing type reluctance motor is worked hard on stator, direct current composition in the drive current is therefrom peeled off, reduced the apparent driving power effectively, reduced the drive circuit cost and made it compatible mutually with other motor-drive circuit, reduce harmonic wave and pulsating composition, created an advantage for the extensive use of reluctance motor.Connection by the excitation winding is different with magnetic structure, and the magnetic biasing type reluctance motor can be divided into again: the star angle connects kinds such as magnetic biasing type reluctance motor, extremely even reversal connection magnetic biasing type reluctance motor, external magnetic circuit magnetic biasing type reluctance motor, (interdigital) permanent-magnet bias formula reluctance motor.But the leakage field problem still exists, and does not improve.
Certainly leakage field also can utilize sometimes, if leakage field direction and value are controlled, as motor: wishing during startup has bigger negative leakage field, causes the multiplication of flux change amount, and back electromotive force is big, and it is big to export torque, and torque fluctuations is little; When running up, wish to have bigger positive leakage field,, produce similar weak-magnetic speed-regulating effect to reduce back electromotive force.As the generator time spent, when the direction of change leakage field and value, adjustable output voltage.The magnetic flux leakage that how to change or regulate motor promptly becomes current main research topic.
Summary of the invention:
The objective of the invention is to invent a kind of permanent magnet that is embedded in the reluctance motor teeth groove changes the method for magnetic flux leakage and teeth groove magnetic biasing type reluctance motor is provided.
Technical solution of the present invention is achieved in that a kind of method that changes the reluctance motor leakage field, it is characterized in that being in all the time in the teeth groove of the unidirectional magnetic flux of excitation winding main magnetic circuit and place the polarity that the magnetizes permanent magnet linear corresponding with flow direction, permanent magnet can change magnetic flux leakage at stator and rotor tooth, groove when aliging.
Teeth groove magnetic biasing type reluctance motor according to the said method design, form by the stator that has excitation winding, rotor and housing, it is characterized in that being in all the time the band tooth magnetic pole on the unidirectional magnetic flux direction of main magnetic circuit, be embedded with magnetize polar orientation and the linear corresponding permanent-magnet of the logical direction of main magnetic circuit excitation in the local at least teeth groove.The polarity that magnetizes of permanent magnet can be selected identically or opposite with the logical direction of main magnetic circuit excitation in this structure, and reaching increases magnetic leakage flux or minimizing or become the negative sense leakage flux.It is big to change in the teeth groove polarity difficulty that magnetizes of permanent magnet in same magnetic group motor, but the sense of current that can be by changing excitation winding and size reach and change or regulate magnetic flux leakage.
When the permanent magnet polarity that magnetizes opposite with the flow direction of reluctance motor excitation main magnetic circuit, (because of the logical direction of leakage flux direction and excitation identical) teeth groove permanent magnetism can hinder leakage flux and flow through from teeth groove, and after reverse magnetic bias that the teeth groove permanent magnet produces is greater than certain value, can also produce anti-(bearing) to leakage flux.Because the permanent magnet present position is special: during stator and rotor tooth-groove relative position, bigger to the leakage flux effect of flowing through; When rotor tooth-tooth is relative, less to the main flux side effect of flowing through.Therefore the opposing magnetic field of teeth groove permanent magnet also is that the reverse magnetic bias of teeth groove can effectively increase the flux change amount, improves motor torque density, power density.Otherwise, if when the logical direction of permanent magnet polarity and main magnetic circuit excitation is identical, just can increase leakage flux, make and decide align with the tooth-groove main magnetic circuit excitation of two condition of commentaries on classics, sub-tooth-tooth alignment and lead to variable quantity and reduce, back electromotive force reduces, and is equivalent to the weak magnetic state of direct current machine.By changing the excitation direction of main magnetic circuit, can regulate the effect of the forward and reverse magnetic bias of teeth groove permanent magnet, therefore the structure of forward and reverse teeth groove bias electric machine is the same basically.
The inventive method uniqueness, the reluctance motor of design has rational in infrastructure, utilizes in the part teeth groove to be embedded into the magnetic bias permanent magnet, reaches the purpose that changes or eliminate the reluctance motor leakage field, improve the performance and the unit volume moment of reluctance motor greatly, significantly improve its cost performance.
Description of drawings:
The present invention will be further described below in conjunction with concrete legend:
Fig. 1 star angle connects the magnetic biasing type reluctance motor and adds teeth groove magnetic bias profile
The extremely even reversal connection magnetic biasing type of Fig. 2 reluctance motor adds teeth groove magnetic bias profile
Fig. 3 mixed magnetic circuit stepping motor adds teeth groove magnetic bias profile
Fig. 4 external magnetic circuit magnetic biasing type reluctance motor adds teeth groove magnetic bias profile
The big step angle inductor machine of Fig. 5 adds teeth groove magnetic bias profile
Fig. 6 (interdigital) permanent-magnet bias formula reluctance motor adds teeth groove magnetic bias profile
The simple teeth groove magnetic biasing type of Fig. 7 reluctance motor one profile
The simple teeth groove magnetic biasing type of Fig. 8 reluctance motor two profiles
Wherein
1-stator 11-magnetic pole 12-teeth groove 2-rotor
3-housing 4-permanent magnet 5-master permanent magnet
Embodiment:
Below mainly be described in scheme how to implement teeth groove magnetic bias technology in the reluctance motor by instantiation.
Permanent magnet is embedded in the teeth groove, can be embedded among the stator teeth groove or among the rotor teeth groove according to the concrete kind selection of reluctance motor.Described permanent-magnet is embedded in the teeth groove of magnetic pole of the stator, and its magnetic polarity is arranged opposite or identical with the magnetic flux direction of this magnetic pole.This kind scheme is applicable to all reluctance motor structures.
Described permanent-magnet also can be embedded in the rotor teeth groove, and its magnetic polarity orientation is opposite with the magnetic flux direction or identical.This kind scheme only can be adapted to the reluctance motor that applies magnetic bias between axial phase-splitting reluctance motor or at least one pair of stator (as: many to stator external magnetic circuit magnetic biasing type reluctance motor, composite stepper motor, inductor machine etc.), in the rotor rotation process of above-mentioned motor, the resultant flux that flows through the stator and rotor air gap all is unidirectional pulsation magnetic flux, this moment, permanent magnet was embedded in the rotor teeth groove, just can play producing the reverse magnetic bias of teeth groove, reduce the effect of leakage field.
Embodiment one: the star angle connects the magnetic biasing type reluctance motor and adds the teeth groove magnetic bias
With reference to Fig. 1, the star angle connects the mechanical structure of magnetic biasing type reluctance motor, magnetic pole distributes just the same with traditional reluctance motor, comprise the stator 1 that has excitation winding, rotor 2 and housing 3, omit excitation winding (following all legends are also all omitted) among the figure, rotor 2 is not with magnetic, the excitation winding that utilization is installed on stator 1 magnetic pole 11 produces magnetic field, rotor 2 is produced suction, drive rotor rotation, therefore the polarity of each adjacent pole 11 is different, according to the reverse magnetic bias principle of teeth groove, permanent magnet 4 can be inserted stator teeth groove 12, and the permanent magnet 4 same polarity of inserting adjacent pole are different, as shown in the figure.Be a kind of typical three-phase two utmost point magnetic biasing type reluctance motors among the figure, change the stator excitation sense of current, this example becomes teeth groove forward bias magnetic-type magneto.Utilize this method, do the motor time spent, can when low rate start, adopt the anti-magnetic bias mode of teeth groove to obtain big moment; During high-speed cruising, adopt positive magnetic bias operation, reach the weak-magnetic speed-regulating effect, promote high speed performance.This principle is applicable to each example except that following example 6.This routine scheme is applicable to common reluctance motor, switched reluctance machines, interdigital magnetic biasing type reluctance motor etc. too.
Embodiment two: extremely even reversal connection magnetic biasing type reluctance motor adds the teeth groove magnetic bias
With reference to Fig. 2, be illustrated as the extremely even reversal connection magnetic biasing type of two-phase four utmost points reluctance motor, the several magnetic bias windings identical polarity are unified, be concentrated into a pair of winding, form upper and lower a pair of big magnetic bias polarity, for making the permanent magnet 4 of inserting teeth groove 12 opposite with main magnetic circuit polarity, permanent magnet can only be inserted stator, polarity is as shown in the figure.This example only needed to change magnetic bias winding exciting curent direction and size of current as the generator time spent, and scalable generator electromotive force is large and small, changes output voltage, and overcoming magneto does not have the adjustable defective of excitation.This principle is equally applicable to example one-example five.
Embodiment three: the mixed magnetic circuit stepping motor adds the teeth groove magnetic bias
With reference to Fig. 3, shown in the figure be composite stepper motor wherein one section stator and rotor add the structure of the reverse magnetic bias of teeth groove, the epitrochanterian utmost point tooth of another section drops on teeth groove projection place the last period just, stagger mutually, the last period stator the polarity of the magnetic field that produces of excitation winding just and back one section opposite, so permanent magnet 4 can be installed in the teeth groove 12 of stator 1 or rotor 2 all can, be installed in the teeth groove 12 the last period permanent magnet 4 polarity with back one section opposite.Permanent magnet 4 polarity of inserting teeth groove 12 shown in the figure are all identical, both can select to insert stator, also can select to insert rotor.
The real example four of cutting off: external magnetic circuit magnetic biasing type reluctance motor adds the teeth groove magnetic bias
External magnetic circuit magnetic biasing type reluctance motor has multiple structure, and wherein a kind of cup-shaped rotor structure only is shown among the figure.Though the former main magnetic circuit magnetic bias of this routine used external magnetic circuit permanent-magnet bias motor adopts permanent magnetism, also can change the excitation magnetic bias at this, cooperates the anti-magnetic bias of teeth groove, produces better effect.This routine power density is higher, and manufacturing process is not too difficult, can be used for oil, electric mixed electric automobile is made electronic, electricity generating dual purpose motor, and randomly changing major loop magnetic bias winding current direction in service, value can be realized various optimum operations.Permanent magnet among the figure in the stator teeth groove also can change to be put in the rotor teeth groove.
Embodiment five: big step angle inductor machine adds the teeth groove magnetic bias
With reference to Fig. 5, in fact inductor machine is exactly the composite stepper motor of big step angle, though stator 1 every number of teeth that extremely goes up has reduced to a tooth, does not have suitable teeth groove can settle permanent magnet, but, therefore permanent magnet 4 can be inserted in the rotor teeth groove 12 because that every section rotor 2 air gap main flux side are asked is single.
Embodiment six: (interdigital) permanent-magnet bias formula reluctance motor adds the teeth groove magnetic bias
With reference to Fig. 6, there has been permanent magnet in the interdigital permanent-magnet bias formula reluctance motor stator, conveniently be called main permanent magnet 5 in order to express.For fear of main permanent magnet 5 and 4 mutual degaussings of the reverse magnetic bias permanent magnet of teeth groove, the thickness of the reverse magnetic bias permanent magnet of installing at teeth groove 12 4 of teeth groove should be thicker than main permanent magnet, and coercive force is higher.With A in scheming is example mutually, and teeth groove permanent magnet 4 counter magnetic fluxs of A magnetic pole 11 are flowed back to through external rotor 2 by the tooth bypass on C phase, the B phase magnetic pole 11; Teeth groove permanent magnet 4 counter magnetic fluxs of a magnetic pole 11, by rotor 2, air gap by the tooth bypass on b, the c magnetic pole.Though teeth groove permanent magnet 4 has stronger magnetomotive force, respectively by after the bypass of the institute of the tooth on other magnetic pole, main permanent magnet 5 degaussings that just are not enough to the forward magnetic bias of stator 1 magnetic pole fall in remaining reverse magnetic pressure.This principle is equally applicable to mix (inductor) formula magneto and external magnetic circuit magneto and permanent magnetism biconvex pole switching reluctance motor etc.
Embodiment seven: simple teeth groove magnetic biasing type reluctance motor one
The tradition reluctance motor generally all drives with pulsating direct current, and bias electric machine and composite stepper motor etc. are used AC driving, and type of drive and synchronous machine, asynchronous machine are basic identical.After teeth groove was inserted permanent magnet, traditional reluctance motor also can adopt AC driving, and is identical with other bias electric machine, hybrid motor.Shown in Figure 7 is wherein a kind of typical external rotor three-phase and quadrupole electric machine structure, drives winding and can drive also available AC driving with DC pulse.
Embodiment eight: simple teeth groove magnetic biasing type reluctance motor two
Shown in Figure 8 is that the internal rotor two-phase reluctance machine adds the motor that constitutes behind the teeth groove permanent magnet, and wherein the teeth groove permanent magnet is same polarity entirely, can select to insert stator teeth groove or rotor teeth groove, and the motor of Gou Chenging too can be with the also available AC driving of DC pulse like this.Fig. 8 is with Fig. 7 difference: stator and rotor tooth difference is different, and Fig. 7 tooth difference equals every phase number of magnetic poles; Fig. 8 tooth difference equals every phase magnetic pole logarithm.The symmetry of the every phase magnetic circuit of Fig. 8 is better than Fig. 7.
Claims (7)
1, a kind of method that changes the reluctance motor leakage field is characterized in that being in all the time in the teeth groove of the unidirectional magnetic flux of excitation winding main magnetic circuit and places the polarity that the magnetizes permanent magnet linear corresponding with flow direction, and permanent magnet can change magnetic flux leakage at stator and rotor tooth, groove when aliging.
2, the method for change reluctance motor leakage field according to claim 1 is characterized in that magnetic flux leakage can regulate by the sense of current and the size of excitation winding.
3, the teeth groove magnetic biasing type reluctance motor that designs according to the described method of claim 1, comprise the stator, rotor and the housing that have excitation winding, it is characterized in that being in all the time the band tooth magnetic pole on the unidirectional flow direction of excitation winding main magnetic circuit, the polar orientation that the magnetizes permanent magnet linear corresponding with flow direction is installed in the local at least teeth groove.
4, teeth groove magnetic biasing type reluctance motor according to claim 3 is characterized in that permanent-magnet is embedded in the teeth groove of magnetic pole of the stator, and its flow direction is identical with the leakage flux direction of magnetic pole.
5, teeth groove magnetic biasing type reluctance motor according to claim 3 is characterized in that permanent-magnet is embedded in the teeth groove of magnetic pole of the stator, and its flow direction is opposite with the leakage flux direction of magnetic pole.
6, teeth groove magnetic biasing type reluctance motor according to claim 3 is characterized in that permanent-magnet is embedded in the rotor teeth groove, and its flow direction is identical with the stator leakage flux direction.
7, teeth groove magnetic biasing type reluctance motor according to claim 3 is characterized in that permanent-magnet is embedded in the rotor teeth groove, and its flow direction is opposite with the stator leakage flux direction.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410061296 CN1783670A (en) | 2004-12-03 | 2004-12-03 | Method for changing magnetic leakage of magnetoresistance motor and its gear slot bias magnetic magnetoresistance motor |
| PCT/CN2005/002081 WO2006058505A1 (en) | 2004-12-03 | 2005-12-02 | Method of changing leakage flux of reluctance motor and its tooth-slot magnetic biasing type reluctance motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410061296 CN1783670A (en) | 2004-12-03 | 2004-12-03 | Method for changing magnetic leakage of magnetoresistance motor and its gear slot bias magnetic magnetoresistance motor |
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| Publication Number | Publication Date |
|---|---|
| CN1783670A true CN1783670A (en) | 2006-06-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410061296 Pending CN1783670A (en) | 2004-12-03 | 2004-12-03 | Method for changing magnetic leakage of magnetoresistance motor and its gear slot bias magnetic magnetoresistance motor |
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| Country | Link |
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| CN (1) | CN1783670A (en) |
| WO (1) | WO2006058505A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101431284B (en) * | 2008-12-22 | 2011-01-12 | 哈尔滨工业大学 | Composite switch reluctance motor |
| CN102118096A (en) * | 2010-01-04 | 2011-07-06 | 株式会社日立制作所 | Rotating electrical machine |
| CN104362822A (en) * | 2014-10-24 | 2015-02-18 | 东南大学 | Self-flux-weakening composite flux-switching permanent-magnet motor |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2468696B (en) * | 2009-03-18 | 2011-08-10 | Imra Europ S A S Uk Res Ct | An electrical machine |
| GB2475811B (en) * | 2009-03-18 | 2012-02-01 | Imra Europe Sas | An electrical machine |
| JP7438839B2 (en) * | 2020-04-24 | 2024-02-27 | オリエンタルモーター株式会社 | stepper motor |
| CN112910114A (en) * | 2021-01-25 | 2021-06-04 | 上海电力大学 | Four-phase 16/18-pole hybrid excitation fault-tolerant reluctance generator |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1458733A (en) * | 2003-06-12 | 2003-11-26 | 哈尔滨工业大学 | Directly driveng mixed reluctance motor |
| CN1297059C (en) * | 2003-06-30 | 2007-01-24 | 哈尔滨工业大学 | Direct driving permanent magnet type magnetic resistance motor |
| CN100369367C (en) * | 2004-02-23 | 2008-02-13 | 哈尔滨工业大学 | Mixed excitation switch reluctance motor |
-
2004
- 2004-12-03 CN CN 200410061296 patent/CN1783670A/en active Pending
-
2005
- 2005-12-02 WO PCT/CN2005/002081 patent/WO2006058505A1/en active Application Filing
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101431284B (en) * | 2008-12-22 | 2011-01-12 | 哈尔滨工业大学 | Composite switch reluctance motor |
| CN102118096A (en) * | 2010-01-04 | 2011-07-06 | 株式会社日立制作所 | Rotating electrical machine |
| CN104362822A (en) * | 2014-10-24 | 2015-02-18 | 东南大学 | Self-flux-weakening composite flux-switching permanent-magnet motor |
| CN104362822B (en) * | 2014-10-24 | 2017-02-22 | 东南大学 | Self-flux-weakening composite flux-switching permanent-magnet motor |
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| Publication number | Publication date |
|---|---|
| WO2006058505A1 (en) | 2006-06-08 |
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Open date: 20060607 |