CN101414774A - Brushless DC motor - Google Patents
Brushless DC motor Download PDFInfo
- Publication number
- CN101414774A CN101414774A CNA200810213024XA CN200810213024A CN101414774A CN 101414774 A CN101414774 A CN 101414774A CN A200810213024X A CNA200810213024X A CN A200810213024XA CN 200810213024 A CN200810213024 A CN 200810213024A CN 101414774 A CN101414774 A CN 101414774A
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- CN
- China
- Prior art keywords
- hole
- rotor core
- brshless
- magnet
- jiao
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
- H02K29/03—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with a magnetic circuit specially adapted for avoiding torque ripples or self-starting problems
-
- 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
- H02K1/14—Stator cores with salient poles
- H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
-
- 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
- H02K1/16—Stator cores with slots for windings
- H02K1/165—Shape, form or location of the slots
-
- 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
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
- H02K1/2766—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect
-
- 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
- H02K2201/03—Machines characterised by aspects of the air-gap between rotor and stator
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Abstract
The invention discloses a brushless DC motor. According to the invention, the distortions of the maximum and minimum of the induction voltage can be prevented, therefore the performance of the motor can be improved. The brushless DC motor provided by the invention, comprises a stator forming multiple grooves and teeth, a rotator core arranged in the stator and forming a magnet embedding hole and a magnetic leak-proof hole, and a permanent magnet arranged in the magnet embedding hole, wherein the magnetic leak-proof hole is provided a hole curved from the periphery of the magnetic leak-proof hole to the inside of the rotator core along with the periphery of the rotator core and the periphery of the magnetic leak-proof hole separated from the periphery of the rotator core.
Description
Technical field
The present invention relates to a kind of brshless DC motor, relate in particular to anti-leakage field pore structure is carried out improved brshless DC motor.
Background technology
In general, drive unit is widely used in producing the industrial circle of home appliance and industrial equipment etc.In this drive unit, representative is to utilize power-actuated motor.
Motor is divided into a variety of according to its application target.Brshless DC motor wherein (BrushlessDirect Current Motor) especially has following characteristics: do not have mechanical contact portions such as commutator and brush, can reduce volume and weight, can be easy to control rate.Thus, not only prevent electric mill and undermine mechanical wear and noise, and compare with motor and to have relative longer useful life, thereby its scope of application just progressively enlarges with brush.
Existing brshless DC motor comprises: stator; Be arranged on the rotor core that magnet is imbedded the hole that is formed with of stator inboard; Be embedded to magnet and imbed the permanent magnet in hole; Be riveted to the top and the bottom cover plate of two sides of rotor core.
But prior art exists for and prevents from the leakage field phenomenon that takes place on the permanent magnet and be formed on magnet to imbed the problem that the anti-leakage field hole at two ends, hole can't prevent leakage field effectively.
Summary of the invention
The present invention proposes in order to address the above problem, and the object of the present invention is to provide a kind of brshless DC motor that can prevent the distortion phenomenon that partly occurs in the maximum of induced voltage part and minimum value.
And, another object of the present invention is to provide a kind of brshless DC motor that can improve motor performance and be easy to control.
To achieve these goals, brshless DC motor provided by the present invention, the magnet that is formed with that comprise the stator that is formed with a plurality of grooves and tooth (teeth), is arranged on described stator inboard is imbedded the rotor core in hole and anti-leakage field hole and is arranged on the permanent magnet that described magnet is imbedded the hole, it is characterized in that: described anti-leakage field hole has the anti-leakage field hole outer peripheral edges that separate along described rotor core outer peripheral edges and described rotor core outer peripheral edges, and forms from the bent hole of described anti-leakage field hole outer peripheral edges to described rotor core interior curve.
Preferably, described anti-leakage field hole further comprises the leak main body that is connected with described bent hole, and described bent hole comprises: be connected with a side end of described leak main body and begin bend to described rotor core interior curve from described anti-leakage field hole outer peripheral edges; From the rake of described bend to described rotor core inner inclination extension; Form the end of described rake end.
Preferably, described bend is imbedded the center position bending in hole to described magnet.
Preferably, described bent hole is imbedded straight line that center, hole and described rotor core center be linked to be about described magnet and other adjacent bent holes are arranged in opposite directions.
Preferably, described end is arranged between first jiao and second jiao, wherein, described first jiao by described rotor core center and the outer ends that is equivalent to a plurality of adjacent teeth of the number of teeth X that determines according to following formula constituted, and described second jiao by to the described first jiao outside adjacent a pair of groove carry out binary line and constitute, be used for determining that the formula of described number of teeth X is:
Total groove number of number of teeth X=stator/(rotor number of poles * power supply number).
Preferably, the terminal point that meets of described rake and described end is arranged in the extended line of described anti-leakage field hole outer peripheral edges and constitutes point that described first jiao straight line meets and be parallel to described magnet from described bend and imbeds between the line that the length direction in cross section, hole extends.
Preferably, the bend of described bent hole be arranged in described second jiao and prolong from described rotor core center and to the described second jiao outside adjacent a pair of tooth carry out between the third angle that binary line constituted.
Preferably, described magnet is imbedded the hole and is had the rectangle cross sectional shape, and is the form of twisted rotary shaft with the state arrangement that each magnet is imbedded the end certain distance disconnected from each other in hole.
Preferably, the width of described rake equals the width of the described leak main body that is connected with described rake.
According to the present invention, can prevent the distortion phenomenon that partly occurs in the maximum of induced voltage part and minimum value, thereby improve motor performance.
And, can improve the controllability of motor, thereby can improve reliability of products.
Description of drawings
Fig. 1 is the sectional view according to the brshless DC motor of exemplary embodiment of the present invention;
The sectional view that Fig. 2 is amplified for the bent hole to Fig. 1;
The sectional view that Fig. 3 is amplified for the rake to Fig. 2;
Fig. 4 A is the magnetic flux flow cardon of expression according to the magnetic flux flows of the brshless DC motor of prior art;
Fig. 4 B is the magnetic flux flows line chart of magnetic flux flows at the stator tooth place of presentation graphs 4A;
Fig. 4 C is the induced voltage line chart with the magnetic flux flows of induced voltage presentation graphs 4B;
The line chart that Fig. 4 D changes for the expression induced voltage corresponding with the magnetic flux flows of Fig. 4 A;
Fig. 5 A is the magnetic flux flow cardon of expression according to the magnetic flux flows of brshless DC motor of the present invention;
Fig. 5 B is the synoptic diagram that is used for according to the magnetic flux flows at the stator tooth place of the rotation key diagram 5A of rotor;
Fig. 5 C is the synoptic diagram that is used for according to the magnetic flux flows at the stator tooth place of the rotation key diagram 5A of rotor;
Fig. 5 D is the line chart corresponding to the magnetic flux flows of the rotation of rotor core at stator tooth place shown in presentation graphs 5B and Fig. 5 C;
Fig. 5 E is the line chart with the magnetic flux flows of the change list diagrammatic sketch 5D of induced voltage;
The line chart that Fig. 5 F changes for the expression induced voltage corresponding with the magnetic flux flows of Fig. 5 A.
Main symbol description: 100 is brshless DC motor, and 110 is stator, and 111 is yoke, 113 is groove, and T is a tooth, and 117 is coil, 120 is rotor core, and 121 imbed the hole for magnet, and 123 is permanent magnet, 125 are rotating shaft, and 140 are anti-leakage field hole, and 141 is the leak main body, 143 are anti-leakage field hole outer peripheral edges, and 150 is bent hole, and 151 is bend, 153 is rake, and 155 is the end.
Embodiment
Below, describe the present invention in detail with reference to accompanying drawing.
Fig. 1 represents the sectional view of brshless DC motor schematic configuration according to an exemplary embodiment of the present invention, the sectional view that Fig. 2 partly amplifies for the bent hole to Fig. 1, the sectional view that Fig. 3 amplifies for the rake to Fig. 2.
Brshless DC motor 100 provided by the present invention comprises stator 110, rotor core 120, anti-leakage field hole 140 and bent hole 150.
As shown in Figure 1, roughly form drum according to the stator 110 that exemplary embodiment provided by stacked magnetic steel plate.Stator 110 is formed with a plurality of grooves 113.Stator 110 further comprises yoke 111, tooth T and coil 117.
As shown in Figure 1, yoke 111 forms the profile that comprises outer peripheral edges of stator 110, and it forms by the magnetic steel flaggy is folded, has drum.
As shown in Figure 1, groove 113 is used to hold coil 117 for being formed on the space between each tooth T.
As shown in Figures 1 and 2, tooth T has from yoke 111 to radially inner side, i.e. shape of extending to rotor core 120 center O.
Below, for the symbol of tooth T, can be expressed as the first tooth T as required
1, the second tooth T
2Deng being distinguished or unified represented with T.
As shown in Figure 1, coil 117 is accommodated in the groove 113, and forms magnetic field by interacting with permanent magnet 123, thereby induction produces magnetic flux flows.
As shown in Figure 1, have a determining deviation between rotor core 120 and the stator 110, and rotor core 120 to be set to relative stator 110 rotatable.As stator 110, rotor core 120 also forms cylindrical shape by a plurality of magnetic steel flaggies are folded.Rotor core 120 comprises magnet and imbeds hole 121, permanent magnet 123 and rotating shaft 125.
As shown in Figure 1, along the circumferential direction form a plurality of magnet in the outside of rotor core 120 central parts and imbed hole 121.Magnet is imbedded and is accommodated the permanent magnet 123 that can produce magnetic flux in the hole 121.
Magnet is imbedded hole 121 and is had the rectangle cross sectional shape, and the best state arrangement of imbedding the end certain distance disconnected from each other in hole 121 with each magnet is the form around described rotating shaft 125.
As shown in Figure 1, rotating shaft 125 is pressed into rotor core 120 centers, rotates jointly with rotor core 120.
Rivet hole 127 is located at that magnet is imbedded 121 outsides, hole and mutually combine a plurality of tops cover plate and bottom cover plate (not shown), imbeds hole 121 from magnet and spins off to prevent permanent magnet 123.
At this, as exemplary embodiment, as shown in Figure 1, the line that anti-leakage field hole 140a, 140b imbed hole 121 central authorities and rotor core 120 center O about magnet is arranged as two pairs symmetrically.That is, a pair of anti-leakage field hole 140a and the adjacent layout of rotor core 120 center O, and have the triangular-section, and a pair of anti-leakage field hole 140b is arranged in the outside that leakage field hole 140a is prevented in the triangular-section in addition, roughly is the L shape.Below, only the anti-leakage field hole 140b that roughly is the L shape is described about anti-leakage field hole 140.But anti-leakage field hole 140 can have the multiple shape that is different from exemplary embodiment.Below, for the symbol in the anti-leakage field hole 140 of representative, when not distinguished especially, unification is represented with symbol 140.
The bent hole 150 that anti-leakage field hole 140 comprises the leak main body 141 of L shape and is connected with a side end of leak main body 141, extend from anti-leakage field hole outer peripheral edges 143 towards rotor core 120 inner inclination.
At this, anti-leakage field hole outer peripheral edges 143 are the exterior lateral area in anti-leakage field hole 140, keep at a certain distance away with the outer peripheral edges of rotor core 120.
Bent hole 150 is connected with the end along anti-leakage field hole outer peripheral edges 143 are provided with of leak main body 141.Bent hole 150 is from preventing that leakage field hole outer peripheral edges are towards rotor core 120 interior curve.Bent hole 150 comprises bend 151, rake 153 and end 155.
Bent hole 150 imbeds the line of 121 centers, hole and rotor core 120 center O about magnet and adjacent bent hole 150 is arranged in opposite directions.That is, as shown in Figure 2, a bent hole 150 is imbedded the line at 121 centers, hole and rotor core 120 centers (referring to the O-O of Fig. 2 about magnet
1Line) arranges in opposite directions with another adjacent bent hole 150.That is, a bent hole 150 is about O-O
1Line and another adjacent bent hole 150 symmetric arrangement.
Thus, the distortion phenomenon that utilizes bent hole 150 prevention partly to occur in the maximum part and the minimum value of induced voltage, thus can improve motor properties.And, can improve the controllability of motor, thereby can improve reliability of products.
First jiao of A is that the outboard end of rotor core 120 center O and a plurality of adjacent tooth that is equivalent to number of teeth X is (referring to the O-O of Fig. 2 and Fig. 3
2Line) angle that is constituted.That is, as shown in Figure 2, first jiao of A is the first tooth T that is equivalent to number of teeth X
1, the second tooth T
2Outer ends and the angle that constituted of rotor core 120 center O.
Second jiao of B be prolong from rotor core 120 centers and to the outside of first jiao of A adjacent a pair of groove 113 carry out binary line (referring to the O-O of Fig. 2 and Fig. 3
3Line) angle that is constituted.That is, as shown in Figure 2, second jiao of B is tooth T
1, T
3Between intermediate point, tooth T
2, T
4Between intermediate point and the angle that constituted of rotor core 120 center O.
Third angle C be prolong from rotor core 120 centers and to the outside of second jiao of B adjacent a pair of tooth T carry out binary line (referring to the O-O of Fig. 2 and Fig. 3
4Line) angle that is constituted.That is, as shown in Figure 2, third angle C be from rotor core 120 center O prolong and to the outside of second jiao of B adjacent a pair of tooth (be T
3, T
4) carry out the angle that binary line constituted.
Rake 153 is from the zone of bend 151 to rotor core 120 inner inclination.Rake 153 preferably has impartial width.But rake 153 is to prevent that flux leakage from being can take width that multiple shapes such as a little variation take place in the scope of purpose.One side of rake 153 is connected with bend 151, and its opposite side then forms end 155.
At this, the width of bend 151 and rake 153 is preferably identical with the width of leak main body 141.
And, as shown in Figure 3, the terminal point P that meets in rake 153 and end 155
1Be arranged in a P
2With straight line L
1Between, its mid point P
2Be anti-leakage field hole outer peripheral edges 143 extended line with constitute the point that straight line nearer in two straight lines of first jiao meets, straight line L
1Be to be parallel to magnet from bend 151 to imbed the line (referring to the height H of Fig. 3) that the length direction in 121 cross sections, hole extends.
The quantity of applied tooth T (number of teeth) X among the present invention determines according to following formula (1).
Total groove number of number of teeth X=stator/(rotor number of poles * power supply number) (1)
Below, with reference to Fig. 1 exemplary embodiment of the present invention is described.When the groove number of stator is 24, the number of poles of rotor is 4 utmost points, and the power supply number is 3 phase times, and the number of teeth X that is obtained by formula (1) is 24/ (4 * 3)=2.Be that 2 situation describes to the number of teeth below, but the quantity of tooth T can change according to the quantity of the groove 113 that forms on the stator 110 etc.
The course of work according to brshless DC motor 100 of the present invention with said structure is as follows.
At first, for making brshless DC motor 100 work, to coil 117 making current of a plurality of grooves 113 that are wrapped in stator 110, thereby the polarity of each coil 117 changes successively.Thus, when producing repulsion when identical with coil 117 formed polarity corresponding to the polarity of each permanent magnet 123 of each coil 117, and when polarity is opposite the generation attraction.Has rotary driving force when thus, rotor core 120 is with rotating shaft 125 common rotations.
For this process is described, the brshless DC motor 100 (with reference to Fig. 4 A to Fig. 4 D) of prior art and brshless DC motor of the present invention 100 (with reference to Fig. 5 A to Fig. 5 F) compared is described as follows.
At first, Fig. 5 A is the figure of expression according to the magnetic flux flows of brshless DC motor 100 of the present invention; Fig. 5 B and Fig. 5 C are the tooth T place that is used to illustrate at the stator 110 of Fig. 5 A, the synoptic diagram that the magnetic flux flows corresponding with the rotation of rotor core 120 changes.Fig. 5 D and Fig. 5 E are the magnetic flux flow cardon of the corresponding magnetic flux flows situation of the rotation with rotor core 120 at tooth T place of stator 110 shown in presentation graphs 5B and Fig. 5 C.Fig. 5 F is the induced voltage schematic diagram that the induced voltage of presentation graphs 5A changes.
At this,, suppose and the first tooth T at Fig. 5 A
1Twine U phase coil 117 in the adjacent grooves 113, with the 5th tooth T
5Twine V phase coil 117 in the adjacent grooves 113, with the 4th tooth T
4Twine W phase coil 117 in the adjacent grooves 113.Below, only consider to describe by flux change that U phase coil 117 and permanent magnet 123 produced.
Shown in Fig. 5 A, there are differences according to the magnetic flux flows shown in magnetic flux flows of the present invention and Fig. 4 A according to prior art.Below, this is elaborated.
When rotor core 120 is positioned at position shown in Fig. 5 A, the first tooth T
1The magnetic flux maximum at place, the 5th tooth T
5The magnetic flux minimum at place, and the second tooth T
2And the 3rd tooth T
3The magnetic flux at place is less than the first tooth T
1
That is, shown in Fig. 5 B, at rake 153 outsides and the 5th tooth T
5Between (referring to the K of Fig. 5 B
1) form magnetic flux hardly.That is the 5th tooth T,
5Close mutually at certain intervals between end and the anti-leakage field hole outer peripheral edges 143.Thereby, at the 5th tooth T
5And between the leak main body 141 in anti-leakage field hole 140, by U phase coil 117 and permanent magnet 123 formed magnetic flux minimums.
Shown in Fig. 5 C, rotor core 120 rotates by counter clockwise direction with respect to stator 110.
Thus, according to rotating counterclockwise of rotor core 120, the 3rd tooth T
3The magnetic flux at place increases by sinusoidal rule, the first tooth T
1And the second tooth T
2The magnetic flux at place reduces gradually by sinusoidal rule.
And, the 5th tooth T
5And form predetermined path between the rake 153 (referring to the K of Fig. 5 C
2).That is the 5th tooth T,
5Form predetermined interval K by rake 153 between end and the anti-leakage field hole outer peripheral edges 143
2, and by having the K of predetermined space
2The zone forms the path that magnetic flux is passed through.That is, by according to rake 153 formed with the 5th tooth T
5Interval K
2, along permanent magnet 123 and the 5th tooth T
5Between magnetic flux flows is arranged.
Observation is carried out the variation of the induced voltage of differential to this flux change amount, then the first tooth T
1The U phase induced voltage at place is zero, along with rotor core 120 becomes minimum value by counterclockwise rotating U phase induced voltage from zero.On the other hand, the 5th tooth T
5The U phase induced voltage at place is along with magnetic flux is started from scratch by sinusoidal rule increase from the maximum vanishing.
That is, by U at the 5th tooth T
5The induced voltage that the place produces is shown as the curve that how much has sinusoidal rule shown in Fig. 5 E.But curve is linearly over time for the induced voltage that Fig. 4 C represents.This is because do not adopt rake 153 of the present invention in the prior art.
At this, has the following relation that is called faraday's rule between induced voltage and the total magnetic flux.
Induced voltage=d (total magnetic flux)/dt
That is, for instance, when total magnetic flux is when having the sinusoidal wave function of sinusoidal rule or cosine wave function, because its differential value equals induced voltage, so the function curve of induced voltage and total magnetic flux has the phase differences of 90 degree.
More than, with reference to Fig. 5 B to Fig. 5 C the 5th tooth T among a plurality of tooth T has been described
5The variation that the magnetic flux at place and induced voltage take place corresponding to the trickle rotation of rotor core 120.
If intactly represent the variation of this induced voltage, then shown in Fig. 5 F.That is, bent hole 150 provided by the present invention makes the induced voltage curve approaching more sinusoidal wave compared with prior art at the maximum and the minimum value place of induced voltage.That is, can prevent from shown in Fig. 4 D, to occur in the maximum of induced voltage and the distortion phenomenon at minimum value place.
Thus, brshless DC motor provided by the present invention can prevent and slow down the distortion phenomenon of the maximum part or the minimum value part of induced voltage, thereby can improve motor performance.And, because therefore the variation of induced voltage can improve the control ability of motor more near sinusoidal wave.
Claims (9)
1, a kind of brshless DC motor comprises the stator that is formed with a plurality of grooves and tooth, is arranged on the inboard of described stator and is formed with magnet and imbeds the rotor core in hole and anti-leakage field hole and be arranged on the permanent magnet that described magnet is imbedded the hole, it is characterized in that:
Described anti-leakage field hole has along the anti-leakage field hole outer peripheral edges that the outer peripheral edges of the outer peripheral edges of described rotor core and described rotor core separate, and forms from the bent hole of described anti-leakage field hole outer peripheral edges to described rotor core interior curve.
2, brshless DC motor according to claim 1, it is characterized in that described anti-leakage field hole further comprises the leak main body that is connected with described bent hole, and described bent hole comprises: be connected with a side end of described leak main body and begin bend to described rotor core interior curve from described anti-leakage field hole outer peripheral edges; From the rake of described bend to described rotor core inner inclination extension; Form the end of described rake end.
3, brshless DC motor according to claim 2 is characterized in that described bend imbeds the center position bending in hole to described magnet.
4, brshless DC motor according to claim 1 is characterized in that described bent hole is imbedded straight line that center, hole and described rotor core center be linked to be about described magnet and other adjacent bent holes are arranged in opposite directions.
5, brshless DC motor according to claim 2, it is characterized in that described end is arranged between first jiao and second jiao, wherein, described first jiao by described rotor core center and the outer ends that is equivalent to a plurality of adjacent teeth of the number of teeth X that determines according to following formula constituted, and described second jiao by to the described first jiao outside adjacent a pair of groove carry out binary line and constitute, be used for determining that the formula of described number of teeth X is:
Total groove number of number of teeth X=stator/(rotor number of poles * power supply number).
6, brshless DC motor according to claim 5 is characterized in that the terminal point that meets in described rake and described end is arranged in the extended line of described anti-leakage field hole outer peripheral edges and constitutes point that straight line nearer in two described first jiao straight lines meets and be parallel to described magnet from described bend to imbed between the line that the length direction in cross section, hole extends.
7, brshless DC motor according to claim 5, the bend that it is characterized in that described bent hole be arranged in described second jiao and prolong from described rotor core center and to the described second jiao outside adjacent a pair of tooth carry out between the third angle that binary line constituted.
8,, it is characterized in that described magnet imbeds the hole and have the rectangle cross sectional shape, and be the form of twisted rotary shaft with the state arrangement that each magnet is imbedded the end certain distance disconnected from each other in hole according to claim 5 or 7 described brshless DC motors.
9, brshless DC motor according to claim 2, the width that it is characterized in that described rake equal the width of the described leak main body that is connected with described rake.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020070084199A KR20090019627A (en) | 2007-08-21 | 2007-08-21 | Brushless direct current motor |
KR1020070084199 | 2007-08-21 | ||
KR10-2007-0084199 | 2007-08-21 |
Publications (2)
Publication Number | Publication Date |
---|---|
CN101414774A true CN101414774A (en) | 2009-04-22 |
CN101414774B CN101414774B (en) | 2012-08-22 |
Family
ID=40501823
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN200810213024XA Expired - Fee Related CN101414774B (en) | 2007-08-21 | 2008-08-20 | Brushless DC motor |
Country Status (3)
Country | Link |
---|---|
JP (1) | JP2009050138A (en) |
KR (1) | KR20090019627A (en) |
CN (1) | CN101414774B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104620472A (en) * | 2012-09-07 | 2015-05-13 | 株式会社明电舍 | Rotor of permanent magnet motor |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20140094440A (en) * | 2010-07-09 | 2014-07-30 | 브루사 일렉트로닉 아게 | Laminated rotor for rotating electric machine, in particular for hybrid synchronous motor of vehicle drive |
CN106329869A (en) * | 2015-07-06 | 2017-01-11 | 上海鸣志电器股份有限公司 | Brushless direct current motor capable of reducing braking time |
WO2018008328A1 (en) | 2016-07-08 | 2018-01-11 | 日創電機株式会社 | Motor stator, motor stator manufacturing method, and motor |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10357502A1 (en) * | 2003-12-09 | 2005-07-07 | BSH Bosch und Siemens Hausgeräte GmbH | Electric machine |
KR100854996B1 (en) * | 2005-03-21 | 2008-08-28 | 삼성전자주식회사 | Blushless DC Motor |
-
2007
- 2007-08-21 KR KR1020070084199A patent/KR20090019627A/en not_active Application Discontinuation
- 2007-11-27 JP JP2007306378A patent/JP2009050138A/en active Pending
-
2008
- 2008-08-20 CN CN200810213024XA patent/CN101414774B/en not_active Expired - Fee Related
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104620472A (en) * | 2012-09-07 | 2015-05-13 | 株式会社明电舍 | Rotor of permanent magnet motor |
RU2610300C2 (en) * | 2012-09-07 | 2017-02-09 | Мейденся Корпорейшн | Rotor of electric motor with permanent magnets |
CN104620472B (en) * | 2012-09-07 | 2017-06-16 | 株式会社明电舍 | The rotor of permanent magnet motor |
Also Published As
Publication number | Publication date |
---|---|
JP2009050138A (en) | 2009-03-05 |
KR20090019627A (en) | 2009-02-25 |
CN101414774B (en) | 2012-08-22 |
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