CN105939080B - A kind of motor - Google Patents
A kind of motor Download PDFInfo
- Publication number
- CN105939080B CN105939080B CN201610044810.6A CN201610044810A CN105939080B CN 105939080 B CN105939080 B CN 105939080B CN 201610044810 A CN201610044810 A CN 201610044810A CN 105939080 B CN105939080 B CN 105939080B
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- CN
- China
- Prior art keywords
- magnetizer
- encoder
- motor
- rotor
- induction coil
- 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.)
- Expired - Fee Related
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Classifications
-
- 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
- H02K1/24—Rotor cores with salient poles ; Variable reluctance rotors
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
Abstract
The present invention provides a kind of motor, including stator and the rotor for being pivotally mounted to stator, the motor further includes rotation-speed measuring device, and the rotation-speed measuring device includes: the encoder for being fixedly installed in the rotor and rotating with it, and the encoder includes the first magnetizer；And it is installed on the decoder of the stator, the decoder includes the second magnetizer and the induction coil for being wound into second magnetizer, and the both ends of the induction coil are connected to the input terminal of signal processing unit；When the encoder is rotated with the rotor, the magnetic flux across the induction coil is caused to change, so that the both ends of the induction coil be made to generate periodically variable electric signal；The both ends of the induction coil are connected to the input terminal of signal processing unit.The rotation-speed measuring device construction of motor can be simplified by implementing the present invention, reduced production cost, improved the market competitiveness.
Description
[technical field]
The present invention relates to technical field of motors, and in particular to a kind of motor with rotation-speed measuring device.
[background technique]
Motor speed is a particularly important parameter of technical field of motors, requires to turn motor in many workplaces
Speed measures, and traditional measurement method relies on hall effect sensor and magnetic coding disk, according to the variation of magnetic field strength, Hall
Corresponding change occurs for the voltage of effect sensor to obtain motor speed.Although the precision of hall effect sensor is high, accurately
Degree is high, but cost is also high, so that entire motor is at high price, influences the market competitiveness.
Therefore, a kind of motor that can be realized at lower cost and survey rotating speed functions is needed.
[summary of the invention]
The object of the present invention is to provide a kind of motors, including stator and the rotor for being pivotally mounted to stator, the electricity
Machine further includes rotation-speed measuring device, and the rotation-speed measuring device includes: the coding for being fixedly installed in the rotor and rotating with it
Device, the encoder include the first magnetizer；And it is installed on the decoder of the stator, the decoder includes the second magnetic conduction
Body and the induction coil for being wound into second magnetizer, the both ends of the induction coil are connected to the input of signal processing unit
End；When the encoder is rotated with the rotor, the magnetic flux across the induction coil is caused to change, to make described
The both ends of induction coil generate periodically variable electric signal；The both ends of the induction coil are connected to the defeated of signal processing unit
Enter end.
As a preferred embodiment, second magnetizer is permanent magnet；The encoder include annular interconnecting piece and from
The tabs that the outer edge of the annular interconnecting piece stretches out, the annular interconnecting piece are sheathed on the shaft of the rotor, and described
Shape portion is basically parallel to the shaft and cuts the magnetic induction line of the permanent magnet in rotor rotation.
As a preferred embodiment, the encoder have two or more tabs, it is described two or
More than two tabs are uniformly distributed.
As a preferred embodiment, the center of rotation axis of the line of two magnetic poles of the permanent magnet and the encoder is hung down
Directly.
As a preferred embodiment, the tabs are tile, are twisted around the shaft.
As a preferred embodiment, the center of rotation axis of the line of two magnetic poles of the permanent magnet and the encoder is flat
Row, the permanent magnet both ends are connected with the magnetic conductive part stretched out towards the encoder.
As a preferred embodiment, the induction coil is wrapped in the permanent magnet.
As a preferred embodiment, the induction coil is wrapped in the magnetic conductive part.
As a preferred embodiment, the decoder also has magnetic conductive part, the magnetic conductive part first end and the permanent magnet
The connection of remote encoder-side, second end is located between the nearly encoder-side and shaft of the permanent magnet；The tabs are rotating
When passed through between the second end of the magnetic conductive part and the nearly encoder-side of the permanent magnet.
As a preferred embodiment, first magnetizer is annular permanent magnets, and the annular permanent magnets, which have, alternately to be divided
The pole N of cloth and the pole S pass through the induction coil with the magnetic induction line for being formed during rotation in alternating directions.
As a preferred embodiment, the decoder also has magnetic conductive part, and the first end of the magnetic conductive part is connected to described
One end far from the encoder of second magnetizer, the second end of the magnetic conductive part stretch to the annular permanent magnets, and institute
State second end, the second magnetizer close to the encoder one end respectively close to opposite polarity the two of the annular permanent magnets
A position.
As a preferred embodiment, the stator includes the shell of tubular, several permanent magnets for being installed to outer casing inner wall；Institute
Stating rotor includes the rotor core fixed to the shaft, and the rotor core includes several outwardly directed teeth and around pointing to
The rotor windings of the tooth；The rotor core is as first magnetizer；Second magnetizer reclines in the shell
Wall and between two pieces of adjacent permanent magnets, the direction of second magnetizer and the Radius direction weight of the rotor core
It closes.
As a preferred embodiment, the decoder further includes magnetic conductive part, and the first end of the magnetic conductive part is connected to described
One end far from the rotor core of second magnetizer, second end stretch to the rotor core, and the second end, second
Opposite polarity two position of the one end close to the rotor core of magnetizer respectively close to the rotor core.
As a preferred embodiment, the stator includes the shell of tubular, several permanent magnets for being installed to outer casing inner wall；Institute
Stating rotor includes shaft, the rotor core fixed to the shaft, the rotor core include several outwardly directed teeth and
Around the rotor windings for pointing to the tooth；The rotor core is as first magnetizer；Second magnetizer reclines described
Outer casing inner wall and between two pieces of adjacent permanent magnets, the direction of second magnetizer and a tangent line of the rotor core
Direction is parallel.
Motor of the invention is installed on motor as rotation-speed measuring device using the encoder and decoder of simple structure, has
Reduce costs to effect.
Present invention will be further explained below with reference to the attached drawings and examples.
[Detailed description of the invention]
Fig. 1 is the structural schematic diagram for the motor that first embodiment of the invention provides；
Fig. 2 is the schematic diagram for the encoder that motor shown in Fig. 1 uses；
Fig. 3 is the structural schematic diagram of the rotation-speed measuring device of motor shown in FIG. 1；
Fig. 4 is the structural schematic diagram of the rotation-speed measuring device for the motor that second embodiment of the invention provides；
Fig. 5 is the structural schematic diagram of the rotation-speed measuring device for the motor that third embodiment of the invention provides；
Fig. 6 is the structural schematic diagram of the rotation-speed measuring device for the motor that fourth embodiment of the invention provides；
Fig. 7 is the structural schematic diagram of the rotation-speed measuring device for the motor that fifth embodiment of the invention provides；
Fig. 8 is the structural schematic diagram of the rotation-speed measuring device for the motor that sixth embodiment of the invention provides；
Fig. 9 is the structural schematic diagram for the motor that seventh embodiment of the invention provides；
Figure 10 is the structural schematic diagram for the motor that eighth embodiment of the invention provides；
Figure 11 is the structural schematic diagram for the motor that ninth embodiment of the invention provides.
[specific embodiment]
With reference to Fig. 1 and Fig. 9, the present invention provides a kind of motor 100, including stator 110, rotor 120 and rotation-speed measuring device
130.Rotor 120 is pivotally mounted to stator 110.Rotor includes shaft 122, the rotor core fixed to shaft 122 and snail
Bar etc..The shell 111 of stator 110 including tubular, is installed to shell aperture end at the permanent magnet 112 for being installed to 110 inner wall of shell
Brushgear etc..Rotation-speed measuring device 130 includes encoder 134 and decoder 136.Encoder 134 is fixedly installed to rotor 110
Shaft 122 and rotate synchronously therewith, decoder 136 is installed to stator 110 by fixed frame 132.
With reference to Fig. 1 and Fig. 2, encoder 134 includes the first magnetizer (such as ferroalloy of magnetic conduction), the first magnetizer packet
Include annular interconnecting piece 134a and from the outer edge of annular interconnecting piece stretch out tabs 134b (in the present embodiment for two uniformly every
The tabs 134b opened).Annular interconnecting piece 134a is sheathed on shaft 122, tabs 134b be uniformly distributed and substantially with shaft
In parallel.
Referring to figs. 2 and 3, decoder 136 includes the second magnetizer 137 and the line of induction for being wound into the second magnetizer 137
Circle 138.Second magnetizer 137 is the permanent magnet made of permanent-magnet material of strip.Second magnetizer 137 two magnetic poles (pole N with
The pole S) line is vertical with the center of rotation axis L1 of encoder 134, the rotation of plane and encoder 134 where induction coil 138
Turn centerline axis parallel, the center line of induction coil 138 and the center of rotation axis L1 of encoder 134 are vertical.When encoder 134
When rotating with the shaft 122 of motor, the tabs of encoder 134 periodically alternately close to and far from the second magnetizer 137, are led
The magnetic flux across induction coil 138 is caused to change, so that the both ends of induction coil 138 be made to generate periodically variable telecommunications
Number, the both ends of induction coil 138 are connected to the input terminal of signal processing unit.Change frequency by measuring the electric signal can be with
The circle number of the rotation of shaft 122 is obtained, to obtain the revolving speed of motor.
With reference to Fig. 4, in the second embodiment of the present invention, the difference with first embodiment is, two magnetic poles of permanent magnet
Line it is parallel with the center of rotation axis L1 of encoder 134, the rotation of plane and encoder 134 where induction coil 138
Central axis upright, since the magnetic direction distribution of permanent magnet causes the magnetic flux across induction coil 138 less, forever
Two magnetic poles of magnet are equipped with the magnetic conductive part 139 for enhancing magnetic flux, and magnetic conductive part 139 is made of iron or ferroalloy, magnetic conduction
Part 139 is stretched out from two magnetic poles of the second magnetizer 137 facing towards encoder 134.
With reference to Fig. 5, in third embodiment of the invention, the difference with second embodiment is, induction coil 138 is wound in
The extension of magnetic conductive part 139, the plane where induction coil 138 are parallel with the center of rotation axis of encoder 134.
With reference to Fig. 6, the difference of fourth embodiment of the invention and first embodiment is, permanent magnet is connected with magnetic conductive part 139,
The first end 139a of magnetic conductive part 139 is connected to first magnetic pole of the permanent magnet far from encoder 134, the second end of magnetic conductive part 139
139b protrudes into encoder 134, and second end 139b is not contacted between tabs and shaft 122 with tabs or shaft 122,
Tabs pass through between the second end 139b of magnetic conductive part 139 and the nearly encoder-side of permanent magnet in rotation.
With reference to Fig. 7, in fifth embodiment of the invention, the difference with first embodiment is, encoder 134 be it is cyclic annular forever
Magnet, having along ring-type is the circumferential alternatively distributed pole N and the pole S, as shown in figure 8, the second magnetizer 137 of decoder 136 by
Magnetic conduction ferroalloy is made.138 place plane of induction coil is parallel with the center of rotation axis of the encoder 134.Encoder 134
It is rotated with the rotation of shaft 122, position of magnetic pole changes, and the magnetic direction of generation changes therewith, the sense of decoder 136
Coil 138 is answered to wind the second magnetizer 137 made of magnetic conduction ferroalloy, across the magnetic flux generating period of induction coil 138
Property variation, cause induction coil both ends to generate periodically variable electric signal, measure and the changing rule for analyzing the electric signal can
Obtain motor speed.
With reference to Fig. 8, in the sixth embodiment of the present invention, the difference with the 5th embodiment is, the second magnetizer 137 is also
It is connected with magnetic conductive part 139, the first end 139a of magnetic conductive part 139 is connected to the second side of the magnetizer 137 far from encoder 134,
The second end 139b of magnetic conductive part 139 is arc, stretches to annular permanent magnets, and second end 139b, the second magnetizer 137 is close
Opposite polarity two position of the one end of encoder 134 respectively close to annular permanent magnets.Encoder 134 generate magnetic field due to
It rotates and cyclically-varying occurs.
With reference to Fig. 9, in the seventh embodiment of the present invention, stator 110 includes the shell 111 of tubular, is installed in shell
Several permanent magnets 112, the rotor 120 of wall include shaft 122, the rotor core 124 fixed to shaft, and rotor core 124 includes
Several outwardly directed tooth 124a and the rotor windings (not shown) for being wound into tooth 124a.Rotor core 124 is as volume
Code device, and decoder 134 is installed to the inner wall of stator, and specifically, decoder 134 includes the second magnetizer 137 and is wound into the
The induction coil 138 of two magnetizers 137, the second magnetizer 137 recline outer casing inner wall and be located at two pieces of adjacent permanent magnets 112 it
Between, the direction of the second magnetizer 137 and the Radius direction of rotor core 124 are consistent.Preferably, the second magnetizer 137 is forever
Magnet.After electrical power operation, each tooth of rotor has corresponding polarity, such as the pole N or S under the excitation of rotor windings
Pole, and generating period changes the polarity of each tooth during rotation, occurs so as to cause the magnetic flux for passing through induction coil
Periodically variation.
With reference to Figure 10, in the eighth embodiment of the present invention, the difference with the 7th embodiment is, encoder 134 further includes
Magnetic conductive part 139, the first end 139a of magnetic conductive part 139 are connected to one end of the separate rotor core 124 of the second magnetizer 137, the
Two end 139b stretch to rotor core 124, and one end of the close rotor core 124 of second end 139b, the second magnetizer 137 point
Not close to opposite polarity two positions of rotor core 124, i.e. the second end 139b of magnetic conductive part 139 and the second magnetizer 137
The distance between one end of close rotor core 124 be substantially equal to the winding slot between rotor tooth 124a notch width.
With reference to Figure 11, in the ninth embodiment of the present invention, the difference with the 7th embodiment is, the second magnetizer 137 patch
By outer casing inner wall and between two pieces of adjacent permanent magnets 112, the direction of the second magnetizer 137 and the one of rotor core 124
Tangential direction is parallel.Preferably, what two adjacent teeth 124a that the length of the second magnetizer is equal to or more than rotor core were formed
The notch size of winding slot, and it is less than the distance between the midpoint of radial outer end of two tooth 124a.
Implement motor and its rotation-speed measuring device provided by the invention, instead of traditional Hall element, instead simply
Electromagnetic component reduce the cost of motor while reaching propinquity effect, improve the market competitiveness.
In the present invention, the material of magnetizer is permanent-magnet material or magnetic conductive material unless expressly stated, otherwise magnetic conduction
The material of body is either permanent-magnet material is also possible to magnetic conductive material.
For those of ordinary skill in the art, without departing from the inventive concept of the premise, if can also make
Dry modification and improvement, these are all within the scope of protection of the present invention.Therefore, the scope of protection of the patent of the present invention should be with appended right
Subject to it is required that.
Claims (13)
1. a kind of motor, including stator and the rotor for being pivotally mounted to stator, which is characterized in that the motor further includes turning
Speed measuring device, the rotation-speed measuring device include:
The encoder for being fixedly installed in the rotor and rotating with it, the encoder include the first magnetizer；And
It is installed on the decoder of the stator, the decoder includes the second magnetizer and the sense for being wound into second magnetizer
Coil is answered, the both ends of the induction coil are connected to the input terminal of signal processing unit；The encoder is rotated with the rotor
When, cause the magnetic flux across the induction coil to change, periodically becomes so that the both ends of the induction coil be made to generate
The electric signal of change；
Second magnetizer is permanent magnet；The encoder includes annular interconnecting piece and the outer edge from the annular interconnecting piece
The tabs of stretching, the annular interconnecting piece are sheathed on the shaft of the rotor, and the tabs are basically parallel to the shaft
And in rotor rotation periodically close to and far from the permanent magnet.
2. motor as described in claim 1, which is characterized in that the encoder has more than two tabs, institute
More than two tabs are stated to be uniformly distributed.
3. motor as described in claim 1, which is characterized in that the line of two magnetic poles of the permanent magnet and the encoder
Center of rotation axis is vertical.
4. motor as described in claim 1, which is characterized in that the tabs are tile, are twisted around the shaft.
5. motor as described in claim 1, which is characterized in that the line of two magnetic poles of the permanent magnet and the encoder
Center of rotation axis is parallel, and the permanent magnet both ends are connected with the magnetic conductive part stretched out towards the encoder.
6. motor as claimed in claim 5, which is characterized in that the induction coil is wrapped in the permanent magnet.
7. motor as claimed in claim 5, which is characterized in that the induction coil is wrapped on the magnetic conductive part.
8. motor as claimed in claim 3, which is characterized in that the decoder also has magnetic conductive part, the magnetic conductive part first
Encoder-side remote with the permanent magnet is held to connect, second end is located between the nearly encoder-side and shaft of the permanent magnet；Institute
Tabs are stated to pass through between the second end of the magnetic conductive part and the nearly encoder-side of the permanent magnet in rotation.
9. motor as described in claim 1, which is characterized in that first magnetizer is annular permanent magnets, and the ring-type is forever
Magnet has the pole N and the pole S of circumferentially alternating distribution, passes through institute to form the magnetic line of force of direction checker during rotation
State induction coil.
10. motor as claimed in claim 9, which is characterized in that the decoder also has a magnetic conductive part, and the of the magnetic conductive part
One end is connected to one end far from the encoder of second magnetizer, and the second end of the magnetic conductive part stretches to the ring-type
Permanent magnet, and one end close to the encoder of the second end, the second magnetizer is respectively close to the annular permanent magnets
Opposite polarity two positions.
11. motor as described in claim 1, which is characterized in that the stator includes the shell of tubular, is installed to outer casing inner wall
Several permanent magnets；The rotor includes the rotor core made of permeability magnetic material fixed to the shaft, the rotor iron
Core includes several outwardly directed teeth and the rotor windings for being wound in the tooth；The rotor core is as first magnetic conduction
Body；Second magnetizer reclines the outer casing inner wall and between two pieces of adjacent permanent magnets, the induction coil around
Line center is consistent with the Radius direction of the rotor core.
12. motor as claimed in claim 11, which is characterized in that the decoder further includes magnetic conductive part, the magnetic conductive part
First end is connected to one end far from the rotor core of second magnetizer, and second end stretches to the rotor core, and
And one end close to the rotor core of the second end, the second magnetizer is opposite respectively close to the polarity of the rotor core
Two positions.
13. motor as described in claim 1, which is characterized in that the stator includes the shell of tubular, is installed to outer casing inner wall
Several permanent magnets；The rotor includes shaft, the rotor core fixed to the shaft, the rotor core include it is several to
The tooth of outer stretching and the rotor windings for being set around the tooth；The rotor core is as first magnetizer；Described second
Magnetizer reclines the outer casing inner wall and between two pieces of adjacent permanent magnets, the extending direction of second magnetizer and institute
The tangential direction for stating rotor core is parallel.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510097197X | 2015-03-04 | ||
| CN201510097197 | 2015-03-04 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105939080A CN105939080A (en) | 2016-09-14 |
| CN105939080B true CN105939080B (en) | 2019-11-12 |
Family
ID=57152957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610044810.6A Expired - Fee Related CN105939080B (en) | 2015-03-04 | 2016-01-22 | A kind of motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105939080B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3607638A1 (en) * | 2017-04-05 | 2020-02-12 | TVS Motor Company Limited | Electric machine for a vehicle |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005051969A (en) * | 2003-07-31 | 2005-02-24 | Yaskawa Electric Corp | Thin actuator |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4103018B2 (en) * | 1998-09-02 | 2008-06-18 | 株式会社安川電機 | Servomotor |
| CN202663205U (en) * | 2012-01-13 | 2013-01-09 | 上海赢双电机有限公司 | Rotary transformer for high rotation speed |
| CN204316266U (en) * | 2014-12-31 | 2015-05-06 | 新疆新能源集团节能科技有限责任公司 | A kind of magneto position transducer |
-
2016
- 2016-01-22 CN CN201610044810.6A patent/CN105939080B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005051969A (en) * | 2003-07-31 | 2005-02-24 | Yaskawa Electric Corp | Thin actuator |
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| Publication number | Publication date |
|---|---|
| CN105939080A (en) | 2016-09-14 |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20191112 Termination date: 20210122 |