CN1085693A - Small-sized synchronous motor - Google Patents
Small-sized synchronous motor Download PDFInfo
- Publication number
- CN1085693A CN1085693A CN93117865A CN93117865A CN1085693A CN 1085693 A CN1085693 A CN 1085693A CN 93117865 A CN93117865 A CN 93117865A CN 93117865 A CN93117865 A CN 93117865A CN 1085693 A CN1085693 A CN 1085693A
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- CN
- China
- Prior art keywords
- rotor
- utmost point
- stator core
- magnetization
- small
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- 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.)
- Granted
Links
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 10
- 230000005415 magnetization Effects 0.000 claims abstract description 23
- 230000005405 multipole Effects 0.000 claims 2
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical group N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 13
- 230000000694 effects Effects 0.000 description 8
- 230000005284 excitation Effects 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/24—Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/08—Structural association with bearings
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
Small-sized synchronous motor of the present invention is by eliminating rotor end-face non-uniform magnetization reduction rotor axial noise.The present invention makes the N of rotor 2 end faces, S utmost point amount of magnetization even, and the center that makes rotor 2 and utmost point tooth 9,10 axial coincidence center B stagger mutually, to apply magnetic biasing power.
Description
The present invention relates to prevent in the small-sized synchronous motor structure of rotor axial vibration.
Small-sized same motor in the past produces the rotor axial noise because rotor vibrates to cause vertically.In order to prevent this axial noise, the machine that has is shifted the armature spindle other end on the bearing portions relative with axle head onto at the spring of the end embedding sheet of armature spindle.When this structure, component management are all taken a lot of work with assembling very much, so wish it is improved.
In addition, in the past when rotor magnetizes, the amount of magnetization of rotor circumference face is managed as the weight parameter of motor characteristic.But during the rotor magnetization, the amount of magnetization that is in the rotor end-face of magnetized state with the rotor circumference face is simultaneously then paid little attention to, and is not managed.Consequently, cause the magnetization of rotor end-face inhomogeneous.Occurrence cause according to research rotor axial noise is clear and definite, and the amount of magnetization of rotor end-face, particularly uneven amount of magnetization are to the very big influence that has of rotor axial noise.
The present invention is based on this understanding,, the axial noise of rotor is reduced by eliminating the rotor end-face non-uniform magnetization.
For achieving the above object, the present invention makes the NS utmost point magnetization of rotor end-face even, and the amount of magnetization of each utmost point is equated, obtains magnetic biasing power by the axial overlap center that makes centre of rotor depart from utmost point tooth simultaneously.
Fig. 1 is the profile of small-sized synchronous motor.
Fig. 2 is the oblique view of rotor.
Fig. 3 illustrates the figure of rotor end-face magnetized state of the present invention.
Fig. 4 illustrates a kind of figure of rotor end-face magnetized state in the past.
Fig. 5 represents the curve chart of electric current-attraction (repulsive force) characteristic.
Fig. 6 measures the schematic diagram of attraction.
Fig. 1 shows the structure of small-sized synchronous motor 1.Small-sized synchronous motor 1 is assembled by rotor 2 and stator 3.Rotor 2 as shown in Figure 2 by the circumferencial direction alternating magnetization cylindric permanent magnet 4 form with 5 on the axle that is in the center.Stator 3 is assembled by the cup-shaped stator core 6 of double as shell, tabular stator core 7 and the magnet exciting coil 8 that is embedded in the cup-shaped stator core 6.
The stator core 6 of below be the magnetic of cup-shaped, cuts from the bottom afterwards and holds up, and does poling tooth 9, makes its extremely relative along the peripheral direction of rotor 2 and rotor 2.The stator core 7 of top be a magnetic, divide to cut from central division afterwards and also holds up and do poling tooth 10, makes its extremely relative along the circumferencial direction of rotor 2 and rotor 2.And this two side's utmost point tooth the 9, the 10th, along the circumferential direction alternate configurations.Magnet exciting coil 8 is wrapped on the plastic bobbin 11, and is configured in it up and down between the stator core 6,7.In addition, the core of stator core 7 has formed the hole (space) of just in time laying permanent magnet 4 after being bent to form utmost point tooth 10.
Below stator core 6, open hole 12 with fixed axis 5, in addition, at circular slab 13 of opening one side cover of the stator core 6 of double as shell, and a hole 14 is opened with fixed axis 5 in a certain thereon position.Then, permanent magnet 4 centers of being contained in of rotor 2 are on the shelf 23 of resin, make it can to rotate freely and can move freely on direction of principal axis with respect to axle 5.Stator core 6,7 and plate 13 be the gearcase of double as deceleration usefulness also, wherein is equipped with to slow down with gear 16,17,18.With the resin shelf 23 of rotor 2 be the rotation of the pinion 15 of one, be delivered to output shaft 19 by slowing down with gear 16,17,18.These gears 16,17,18 and output shaft 19 are being supported by the axle 21,22 and the bearing 20 that are fixed between stator core 7 and the plectane 13.
Like this when permanent magnet 4 magnetization, not only make its periphery but also make square with the axis end face reach the amount of magnetization of the identical NS utmost point.Thereby it is the line symmetry at center that the magnetic characteristic of the end face of permanent magnet 4 has formed as shown in Figure 3 with the neutral axis of the NS utmost point (abscissa).Yet small-sized synchronous motor in the past then as shown in Figure 4, magnetized state is asymmetric, amount of magnetization is N＜S, N＞S or at random.
In addition, the center of stator 3 up and down i.e. overlapping utmost point tooth 9,10 formed coincidence magnetic action center B, more are partial to stator core 6 one sides than the magnetic action center A of rotor 2 (permanent magnet 4).
When magnet exciting coil 8 flow through alternating current, rotor 2 is synchronously rotation therewith just.According to this alternating current, the N utmost point and the S utmost point alternately appear on the stator core 6,7.Though occur the N utmost point or the S utmost point on the stator core 7, because its core is hole (space), thereby the magnetic flux of stator 7 does not influence magnetic force for the almost not effect of end face of permanent magnet 4.
But, the stator 6 of double as shell core be with the end face of permanent magnet 4 vis-a-vis.Therefore, when this part produced the N utmost point or the S utmost point, these magnetic poles just acted directly on the end face of permanent magnet 4, under magneticaction rotor 2 are alternately formed attraction or repulsive force.As previously mentioned, the absorbability at this moment or the change of repulsive force cause the axial vibration of rotor 2, cause the rotor axial noise.
Fig. 5 shows the characteristic of electric current-attraction (repulsive force) with curve.The line of this mid point of curve is that the end face of permanent magnet 4 is subjected to the example of magnetic biasing power effect by uniform magnetization, rotor 2, and solid line then is that the end face of permanent magnet 4 is by uniform magnetization but there is not the example of magnetic biasing power effect.In addition, be shown in dotted line in the past, promptly the end face of permanent magnet 4 is failed uniform magnetization, and rotor 2 is not subjected to the example of magnetic biasing power effect.
Fig. 5 shows motor of the present invention, and promptly under the situation of uniform magnetization, even increase exciting current, attraction can not produce very big difference between the N utmost point, the S utmost point.And, electric current is raise also can not occur becoming the phenomenon of repulsive force again.Like this, because attraction does not have very big difference, the axial vibration of rotor 2 does not just have bigger amplitude.If apply magnetic biasing power again,, electric current do not have very big variation even increasing attraction yet.Thereby, avoid producing axial noise, make the end face uniform magnetization of permanent magnet 4, it is effectively applying the effect of magnetic biasing power again.
In addition, stator 3 is during by excitation, rotor 2 since the flux interaction of stator 3 can to produce the magnetic action center B that displacement makes utmost point tooth 9,10 consistent with the magnetic action center A of rotor, effect just because of the displacement force of this magnetic, rotor 2 is pushed to the direction of the stator core 6 of double as shell along axle 5, relies on this biasing force to play to prevent the effect of vibrating.The magnetic biasing power of this moment is directly proportional with the size of electric current.
The dotted line of Fig. 5 is represented characteristic in the past, and when increasing electric current, the N that alternating magnetic field produces, the difference of S interpolar attraction just increase, and it is big that axial vibration meanwhile also becomes.Produce axial noise thus.And along with electric current further increases, attraction has become repulsive force, and the result produces bigger axial noise.
No matter is the S utmost point or the N utmost point for stator core 6 of the present invention by excitation, the attraction between them does not have bigger variation, so axial vibration just diminishes naturally.When applying magnetic biasing power, because of bigger attraction is arranged, it acts on rotor 2 and plays the effect that prevents the power vibrated, has therefore further suppressed the vibration of rotor 2.
In contrast, motor in the past, it is poor bigger attraction to occur between magnetization of the stator core 6 one side N utmost points and the magnetization of the S utmost point, and this difference enlarges greatly with electrorheological.And above after a certain value, attraction just becomes repulsive force, and therefore, it is big that the axial vibration of rotor 2 just becomes.
In addition, as shown in Figure 6,,, measure the axial force that acts on its inner rotator 2 and detect attraction stator 3 excitations at the electric current of magnet exciting coil 8 by prescribed direction.
In the foregoing description, axle 5 is fixed on stator core 6 and the plectane 13, but should axle 5 and can be fixed on the resin frame 23, and at this moment hole 12,14 is exactly a bearing of spools 5.
The present invention since the alternating flux that stator alternation magnetic is raised generation act on epitrochanterian power when the N utmost point and the S utmost point, can not produce bigger poor, thereby there is not spring can prevent the rotor axial noise yet, and by preventing that this rotor oscillation from can also prevent to assemble covibration and the dither that motor produces later on, obtains to rotate stably.
In addition, if make the direction displacement of stator magnet action center by the stator core of mind-set double as shell in the rotor magnetic action, the magnetic attraction (biasing force) that is produced in the time of just can be by means of the stator excitation state further suppresses rotor oscillation.
Claims (2)
1. a small-sized synchronous motor is made up of the multipole magnetized rotor of periphery (2), the magnet exciting coil (8) that comprises the stator core (6,7) of endways and extremely relative utmost point tooth this rotor (2) (9,10) and be configured in utmost point tooth (9, the 10) outside, it is characterized in that making that each utmost point amount of magnetization of end face of above-mentioned multipole magnetized rotor (2) is equal.
2. small-sized synchronous motor as claimed in claim 1, it is characterized in that having the stator core up and down (6,7) that is overlapping magnet exciting coil (8), have on this stator core (6,7) and relatively cut the utmost point tooth of holding up (9,10) separately, this utmost point tooth (9,10) is the configuration of alternatively up and down ground on same circumference, and stator core (6) one sides more are partial to than the axial centre (A) of rotor (2) in the center (B) that utmost point tooth (9,10) axially overlaps.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP71041/92 | 1992-09-18 | ||
| JP1992071041U JP2571775Y2 (en) | 1992-09-18 | 1992-09-18 | Small synchronous motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1085693A true CN1085693A (en) | 1994-04-20 |
| CN1031163C CN1031163C (en) | 1996-02-28 |
Family
ID=13449047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN93117865A Expired - Lifetime CN1031163C (en) | 1992-09-18 | 1993-09-17 | Small synchronous motor |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2571775Y2 (en) |
| KR (1) | KR0133838B1 (en) |
| CN (1) | CN1031163C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102780290A (en) * | 2011-05-09 | 2012-11-14 | 日本电产三协株式会社 | Electromotor |
| CN106300793A (en) * | 2016-08-31 | 2017-01-04 | 江门市恒天科技有限公司 | A kind of quiet electric-motor drive mechanism |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11154427B2 (en) | 2015-05-29 | 2021-10-26 | Kyowa Limited | Medical tape |
-
1992
- 1992-09-18 JP JP1992071041U patent/JP2571775Y2/en not_active Expired - Fee Related
-
1993
- 1993-09-15 KR KR1019930018493A patent/KR0133838B1/en not_active IP Right Cessation
- 1993-09-17 CN CN93117865A patent/CN1031163C/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102780290A (en) * | 2011-05-09 | 2012-11-14 | 日本电产三协株式会社 | Electromotor |
| CN102780290B (en) * | 2011-05-09 | 2015-12-02 | 日本电产三协株式会社 | Motor |
| CN106300793A (en) * | 2016-08-31 | 2017-01-04 | 江门市恒天科技有限公司 | A kind of quiet electric-motor drive mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2571775Y2 (en) | 1998-05-18 |
| JPH0631372U (en) | 1994-04-22 |
| KR940008193A (en) | 1994-04-29 |
| KR0133838B1 (en) | 1998-04-22 |
| CN1031163C (en) | 1996-02-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: NIDEC SANKYO CORP. Free format text: FORMER NAME OR ADDRESS: SANKYO SEIKI MFG. SEISAKUSHO K.K. |
|
| CP03 | Change of name, title or address |
Address after: Nagano Patentee after: Sankyo Seiki Seisakusho KK Address before: Nagano Patentee before: Sankyo Seiki Manufacturing Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20130917 Granted publication date: 19960228 |