CN110943594A - Hybrid stepping motor - Google Patents
Hybrid stepping motor Download PDFInfo
- Publication number
- CN110943594A CN110943594A CN201910904033.1A CN201910904033A CN110943594A CN 110943594 A CN110943594 A CN 110943594A CN 201910904033 A CN201910904033 A CN 201910904033A CN 110943594 A CN110943594 A CN 110943594A
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- China
- Prior art keywords
- rotor core
- stepping motor
- rotor
- end wall
- axial direction
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- 230000002093 peripheral effect Effects 0.000 claims abstract description 39
- 230000000630 rising effect Effects 0.000 claims description 5
- 230000004048 modification Effects 0.000 description 16
- 238000012986 modification Methods 0.000 description 16
- 230000004888 barrier function Effects 0.000 description 8
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910001172 neodymium magnet Inorganic materials 0.000 description 3
- 229910000859 α-Fe Inorganic materials 0.000 description 3
- 239000000696 magnetic material Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K37/00—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors
- H02K37/10—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors of permanent magnet type
- H02K37/12—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors of permanent magnet type with stationary armatures and rotating magnets
- H02K37/14—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors of permanent magnet type with stationary armatures and rotating magnets with magnets rotating within the armatures
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
Provided is a hybrid stepping motor (1) capable of reducing inertia without reducing torque. A1 st rotor core (11) is provided with: an end wall (11a) extending in the radial direction around the rotation shaft (4) at the end of the 1 st rotor core (11) on the front side in the Z-axis direction; and a peripheral wall (11b) extending from the periphery of the one end wall (11a) toward the front side in the Z-axis direction. A hollow portion (13) is enclosed in the one end wall (11a) and the peripheral wall (11 b). The 2 nd rotor core (16) has: another end wall (16a) extending in the radial direction around the rotation shaft (4) at the end portion of the 2 nd rotor core (16) on the rear side in the Z-axis direction; and a peripheral wall (16b) extending from the peripheral edge of the other end wall (16a) toward the rear side in the Z-axis direction. A hollow part (18) is enclosed in the other end wall (16a) and the peripheral wall (16 b).
Description
Technical Field
The present invention relates to a hybrid stepping motor.
Background
There is known a hybrid stepping motor having: a rotor that rotates about a rotation axis; and a stator that encloses the rotor, and has a plurality of teeth provided on an inner peripheral surface around the rotation shaft, and a plurality of teeth provided on an outer peripheral surface of a rotor core of the rotor.
For example, a hybrid stepping motor described in patent document 1 includes: two disk-shaped rotor cores each having a plurality of teeth provided on an outer peripheral surface thereof; and a disk-shaped permanent magnet that is sandwiched between one rotor core and the other rotor core in the axial direction. Through holes passing through the axis are provided in the two rotor cores and the permanent magnets, respectively. The rotation shaft is fitted into these through holes. The rotor is housed in a stator having a cylindrical shape and having a plurality of teeth on an inner peripheral surface.
Patent document 1: japanese patent laid-open publication No. 2013-201825
In general, the lower the inertia (moment of inertia) of the hybrid stepping motor, the more the accuracy of the rotation stop control is improved. Therefore, it is desirable to lighten the rotor to reduce inertia. However, it is difficult to reduce the weight of the rotor core that needs to be made of a magnetic material by devising the material. Further, if the rotor is made smaller, the stator also needs to be made smaller, and as a result, the entire motor becomes smaller, and therefore, a necessary torque cannot be obtained.
Thus, the conventional hybrid stepping motor has a problem that it is difficult to reduce inertia without reducing torque.
Disclosure of Invention
An exemplary 1 st invention of the present application is a hybrid stepping motor including: a rotor that rotates about a rotation axis; and a stator that houses the rotor and has a plurality of teeth provided on an inner circumferential surface around the rotation axis, the rotor including: 1 st rotor core; a 2 nd rotor core disposed on one side of the 1 st rotor core in the axial direction of the rotating shaft; and a magnet axially sandwiched between the 1 st rotor core and the 2 nd rotor core, wherein a plurality of teeth are provided on outer circumferential surfaces of the 1 st rotor core and the 2 nd rotor core, and wherein the 1 st rotor core includes: an end wall extending in a radial direction around the rotation shaft at an end portion on one side in an axial direction of the 1 st rotor core; and a peripheral wall extending from a peripheral edge of the one end wall toward the other axial side, wherein a hollow portion is provided in the one end wall and the peripheral wall of the 1 st rotor core, and the 2 nd rotor core includes: another end wall extending in a radial direction around the rotation shaft at an end portion on the other side in the axial direction of the 2 nd rotor core; and a peripheral wall extending from a peripheral edge of the other end wall toward one axial side, the other end wall of the 2 nd rotor core and the peripheral wall including a hollow portion therein.
According to exemplary 1 st invention of the present application, a hybrid type stepping motor capable of reducing inertia without reducing torque is provided.
Drawings
Fig. 1 is an exploded perspective view of an HB type stepping motor according to an embodiment.
Fig. 2 is a cross-sectional view and a side view of the rotor of the HB stepper motor.
Fig. 3 is a cross-sectional view showing the 1 st rotor core of the HB type stepping motor of the 1 st modification together with a part of the rotation shaft.
Fig. 4 is a perspective view showing the 1 st rotor core of the HB type stepping motor of modification 2 together with a part of the rotation shaft.
Fig. 5 is a cross-sectional view showing the 1 st rotor core of the HB type stepping motor of modification 3 together with a part of the rotation shaft.
Description of the reference symbols
1: an HB type stepping motor; 2: a front flange; 3: a front ball bearing; 4: a rotating shaft; 10: a rotor; 11: 1 st rotor core; 11 a: an end wall; 11 b: a peripheral wall; 11 c: a pyramid part; 11 d: a barrier; 11 e: a barrier; 12: teeth; 13: a hollow part; 16: a 2 nd rotor core; 16 a: the other end wall; 16 b: a peripheral wall; 17: teeth; 18: a hollow part; 19: a permanent magnet; 20: a stator; 21: teeth; 27: a lead connector; 28: a rear ball bearing; 29: a rear flange.
Detailed Description
Hereinafter, a hybrid stepping motor (hereinafter, referred to as an "HB type stepping motor") according to an embodiment of the present invention will be described with reference to the drawings. In the following drawings, in order to make the structures easier to understand, the actual structures may be different in scale, number, and the like from those of the structures.
In the drawings, an XYZ coordinate system is appropriately shown as a three-dimensional orthogonal coordinate system. In the XYZ coordinate system, the Z-axis direction is a direction parallel to the axial direction of the central axis J shown in fig. 1. The X-axis direction is a direction parallel to the short side direction of the HB type stepping motor shown in fig. 1. The Y-axis direction is a direction perpendicular to both the X-axis direction and the Z-axis direction.
In the following description, the positive side (+ Z side) in the Z-axis direction is referred to as "rear side", and the negative side (-Z side) in the Z-axis direction is referred to as "front side". In addition, "rear side" and "front side" are merely names for explanation, and do not limit the actual positional relationship and direction. Unless otherwise specified, a direction parallel to the central axis J (Z-axis direction) is simply referred to as "axial direction", a radial direction about the central axis J is simply referred to as "radial direction", and a circumferential direction about the central axis J, that is, a direction (θ direction) around the central axis J is simply referred to as "circumferential direction".
In the present specification, "extend in the axial direction" includes not only a case where the "extend in the axial direction (Z-axis direction)" is strictly extended but also a case where the "extend in a direction inclined by less than 45 ° with respect to the axial direction. In addition, in the present specification, "extend in the radial direction" includes a case of extending in a direction inclined in a range of less than 45 ° with respect to the radial direction, in addition to a case of extending in a strictly radial direction, that is, a direction perpendicular to the axial direction (Z-axis direction).
The axial direction (Z-axis direction) in each figure corresponds to the axial direction in the present invention. The rear side in the axial direction in the drawings corresponds to one side in the present invention. The front side in the axial direction in the drawings corresponds to the other side in the axial direction in the present invention.
< integral Structure >
Fig. 1 is an exploded perspective view of an HB type stepping motor according to an embodiment. As shown in fig. 1, the HB type stepping motor 1 includes a front flange 2, a front ball bearing 3, a rotary shaft 4, a rotor 10, a stator 20, a lead connector 27, a rear ball bearing 28, a rear flange 29, and the like.
The front side of the rotary shaft 4 is inserted into the front ball bearing 3. The rear side of the rotating shaft is inserted into the rear ball bearing 28. The rotary shaft 4 is rotatably supported by the front ball bearing 3 and the rear ball bearing 28.
The front ball bearing 3 is fixed to the inner surface of the front flange 2. The front flange 2 is fixed to a front portion of a stator 20 that houses a rotor 10 described later. The front end of the rotary shaft 4 penetrates the front ball bearing 3 and the opening provided in the front flange 2 and protrudes to the front side outside the stator 20.
The terminal of the lead connector 27 fixed to the stator 20 is electrically connected to a coil provided in the stator 20 to generate a magnetic force. The rear flange 29 is fixed to the rear portion of the stator 20.
< stator 20>
A plurality of teeth 21 extending in the axial direction are provided at predetermined intervals in the circumferential direction on the inner circumferential surface of the cylindrical stator 20 of the inner rotor 10.
< rotor 10>
The rotor 10 includes a 1 st rotor core 11, a 2 nd rotor core 16 disposed at a position axially rearward of the 1 st rotor core 11, and a permanent magnet 19 interposed between the 1 st rotor core and the 2 nd rotor core in the axial direction.
The permanent magnet 19 is made of neodymium magnet. A ferrite magnet may be used, but the magnetic force per unit weight of the neodymium magnet is stronger than that of the ferrite magnet. Therefore, the permanent magnet 19 made of a neodymium magnet is thinner and lighter than the permanent magnet 19 made of a ferrite magnet, and therefore, inertia can be further reduced.
The 1 st rotor core 11 and the 2 nd rotor core 16 are made of a magnetic material. A plurality of teeth 12 extending in the axial direction are provided at predetermined intervals in the circumferential direction on the outer circumferential surface of the 1 st rotor core 11. A plurality of teeth 17 extending in the axial direction are provided at predetermined intervals in the circumferential direction on the outer circumferential surface of the 2 nd rotor core 16.
Through holes penetrating in the axial direction at the position of the rotation center are provided in the 1 st rotor core 11, the 2 nd rotor core 16, and the permanent magnet 19, respectively. The rotation shaft 4 is fitted into the through holes of the 1 st rotor core 11, the 2 nd rotor core 16, and the permanent magnet 19. The permanent magnet 19 is axially sandwiched between the 1 st rotor core 11 and the 2 nd rotor core 16 in a state where the rotation shaft 4 is fitted.
Fig. 2 is a sectional perspective view showing a part of the rotor 10. The 1 st rotor core 11 includes: an end wall 11a extending in the radial direction around the rotation shaft 4 at an end portion on the rear side in the Z-axis direction of the 1 st rotor core 11; and a peripheral wall 11b extending from a peripheral edge of the one end wall 11a toward the front side in the Z-axis direction. One end wall 11a and a peripheral wall 11b of the 1 st rotor core 11 enclose a hollow portion 13. The hollow portion 13 is a cylindrical recess exposed to the outside through a circular opening facing the front side in the Z-axis direction.
The 2 nd rotor core 16 has: another end wall 16a extending in the radial direction around the rotation shaft 4 at an end portion of the 2 nd rotor core 16 on the Z-axis direction front side; and a peripheral wall 16b extending from the peripheral edge of the other end wall 16a toward the rear side in the Z-axis direction. The other end wall 16a and the peripheral wall 16b of the 2 nd rotor core 16 have a hollow portion 18 therein. The hollow portion 18 is a cylindrical recess exposed to the outside through a circular opening toward the rear side in the Z-axis direction.
The permanent magnet 19 is sandwiched between one end wall 11a of the 1 st rotor core 11 and the other end wall 16a of the 2 nd rotor core 16.
A front collar 31 made of a resin material is interposed between the front ball bearing 3 and the 1 st rotor core 11 in the Z-axis direction. A through hole is provided at the axial center position of the cylindrical base of the front collar 31. The rotation shaft 4 is fitted into the through hole. The front collar 31 is bonded to the 1 st rotor core 11 via a photocurable resin.
A rear collar 32 made of a resin material is interposed between the 2 nd rotor core 16 and the rear ball bearing 28 in the Z-axis direction. A through hole is provided at the axial center of the cylindrical base of the rear collar 32. The rotation shaft 4 is fitted into the through hole. The rear collar 32 is bonded to the 2 nd rotor core 16 via a photocurable resin.
< effects of the HB stepping motor 1 of the embodiment >
(1) In the HB type stepping motor 1, the hollow portion 13 is provided in the 1 st rotor core 11, and the hollow portion 18 is provided in the 2 nd rotor core 16, whereby the rotor 10 can be reduced in weight without downsizing the rotor 10. Thus, according to the HB type stepping motor 1, the inertia can be reduced without reducing the torque by realizing the weight reduction without downsizing the rotor. Further, according to the HB type stepping motor 1, the permanent magnet 19 is interposed between the one end wall 11a of the 1 st rotor core 11 and the other end wall 16a of the 2 nd rotor core 16 in the Z axis direction, whereby the permanent magnet 19 can be fixed in the same manner as in the conventional configuration.
(2) According to the HB type stepping motor 1, the opening toward the front side is provided on the 1 st rotor core 11, and the opening toward the rear side is provided on the 2 nd rotor core 16, whereby the rotor 10 is reduced in weight as compared with the case where no opening is provided. Thus, according to the HB type stepping motor 1, the rotor 10 can be reduced in weight and inertia can be reduced as compared with a case where the openings are not provided in the 1 st rotor core 11 and the 2 nd rotor core 16, respectively.
(3) In the HB type stepping motor 1, the hollow portion 13 of the 1 st rotor core 11 and the hollow portion 18 of the 2 nd rotor core 16 are cylindrical concave portions, respectively. Since the hollow portions 13 and 18 are cylindrical concave portions, variation in weight in the circumferential direction around the rotation shaft 4 is suppressed for each of the 1 st rotor core 11 and the 2 nd rotor core 16. Thus, according to the HB type stepping motor 1, by suppressing the weight deviation in the circumferential direction of the 1 st rotor core 11 and the 2 nd rotor core 16, the instability of the rotation of the rotor 10 due to the weight deviation in the circumferential direction can be suppressed.
Next, modifications obtained by modifying the structure of a part of the HB type stepping motor 1 of the embodiment will be described. Unless otherwise specified below, the HB stepping motor 1 of each modification has the same structure as that of the embodiment.
[ 1 st modification ]
Fig. 3 is a cross-sectional view showing the 1 st rotor core 11 of the HB type stepping motor 1 of the 1 st modification together with a part of the rotation shaft. In the 1 st rotor core 11, a tapered portion 11c is provided in a rising portion on an inner peripheral wall (inner peripheral surface side of the peripheral wall 11b) of the hollow portion 13. In the 2 nd rotor core 16, a tapered portion 16c is provided in a rising portion on the inner peripheral wall of the hollow portion 18 (on the inner peripheral surface side of the peripheral wall 16 b).
< Effect of operation of HB type stepping motor 1 in modification 1 >
(4) In the HB type stepping motor 1, the tapered portion 11c provided in the inner peripheral wall rising portion of the 1 st rotor core 11 makes it easy to extend the magnetic lines of force of the permanent magnets 19 to the Z-axis direction front end portion of the 1 st rotor core 11. Thus, according to the HB type stepping motor 1, the shortage of the magnetic force at the other end of the 1 st rotor core 11 on the front side in the Z axis direction can be suppressed. In the HB type stepping motor 1, the tapered portion 16c provided in the inner peripheral wall rising portion of the 2 nd rotor core 16 facilitates extension of the magnetic lines of force of the permanent magnets 19 to the rear end portion of the 2 nd rotor core 16 in the Z axis direction. Therefore, according to the HB type stepping motor 1, the shortage of the magnetic force at the rear end portion of the 2 nd rotor core 16 in the Z axis direction can be suppressed.
[ 2 nd modification ]
Fig. 4 is a perspective view showing the 1 st rotor core 11 of the HB type stepping motor 1 according to the 2 nd modification together with a part of the rotation shaft 4. As shown in the drawing, the 1 st rotor core 11 is surrounded by a plurality of hollow portions 13 arranged in the circumferential direction around the rotating shaft 4. A barrier 11d is provided between two hollow portions 13 adjacent to each other.
Only the 1 st rotor core 11 of the 1 st rotor core 11 and the 2 nd rotor core 16 is described with reference to fig. 4, but the 2 nd rotor core 16 similarly includes a plurality of hollow portions 18 arranged in the circumferential direction around the rotation shaft 4.
< effects of the HB type stepping motor 1 of modification example 2 >
In the 1 st rotor core 11 of the HB type stepping motor 1, the barrier 11d between the hollow portions 13 arranged in the circumferential direction makes it easy to extend the magnetic lines of force of the permanent magnets 19 to the front end portion in the Z axis direction of the 1 st rotor core 11. Thus, according to the 1 st rotor core 11, the shortage of the magnetic force at the tip end in the Z-axis direction can be suppressed. In addition, in the 2 nd rotor core 16, the barrier between the hollow portions arranged in the circumferential direction makes it easy to extend the magnetic lines of force of the permanent magnets 19 to the rear-side end in the Z-axis direction. Thus, according to the 2 nd rotor core 16, shortage of magnetic force at the rear end in the Z-axis direction can be suppressed.
[ 3 rd modification ]
Fig. 5 is a sectional view showing the 1 st rotor core 11 of the HB type stepping motor 1 according to the 3 rd modification. As shown in the drawing, the 1 st rotor core 11 includes a plurality of hollow portions 13 arranged in the Z-axis direction. A barrier 11e is provided between two hollow portions 13 adjacent to each other in the Z-axis direction.
< working effects of the HB type stepping motor 1 of modification 3 >
In the 1 st rotor core 11 of the HB type stepping motor 1, the barrier 11e between the hollow portions 13 arranged in the Z axis direction makes it easy to extend the magnetic lines of force of the permanent magnets 19 to the front end portion in the Z axis direction. Thus, according to the 1 st rotor core 11, the shortage of the magnetic force at the tip end in the Z-axis direction can be suppressed. In the 2 nd rotor core 16, the barrier between the hollow portions arranged in the Z-axis direction facilitates extension of the magnetic lines of force of the permanent magnets 19 to the rear end in the Z-axis direction. Therefore, according to the 2 nd rotor core 16, the shortage of the magnetic force at the rear end portion of the 2 nd rotor core 16 in the Z-axis direction can be suppressed.
While the preferred embodiments and examples of the present invention have been described above, the present invention is not limited to the above embodiments and examples, and various modifications and changes can be made within the scope of the present invention. The embodiments, examples, and modifications thereof are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalent scope thereof.
Claims (6)
1. A hybrid stepper motor having:
a rotor that rotates about a rotation axis; and
a stator that houses the rotor and has a plurality of teeth provided on an inner circumferential surface around the rotation shaft,
the rotor has:
1 st rotor core;
a 2 nd rotor core disposed on one side of the 1 st rotor core in the axial direction of the rotating shaft; and
a magnet sandwiched between the 1 st rotor core and the 2 nd rotor core in an axial direction,
a plurality of teeth are provided on the outer circumferential surfaces of the 1 st rotor core and the 2 nd rotor core,
wherein,
the 1 st rotor core includes:
an end wall extending in a radial direction around the rotation shaft at an end portion on one side in an axial direction of the 1 st rotor core; and
a peripheral wall extending from a peripheral edge of the one end wall toward the other side in the axial direction,
a hollow portion is provided in the one end wall and the peripheral wall of the 1 st rotor core,
the 2 nd rotor core includes:
another end wall extending in a radial direction around the rotation shaft at an end portion on the other side in the axial direction of the 2 nd rotor core; and
a peripheral wall extending from a peripheral edge of the other end wall toward one side in the axial direction,
a hollow portion is provided in the other end wall and the peripheral wall of the 2 nd rotor core.
2. The hybrid stepping motor according to claim 1,
the 1 st rotor core has an opening at the other end in the axial direction to expose the hollow portion of the 1 st rotor core,
the 2 nd rotor core has an opening at one axial end portion thereof, the opening exposing the hollow portion of the 2 nd rotor core.
3. The hybrid stepping motor as claimed in claim 2,
the peripheral wall and the end wall of the 1 st rotor core are internally wrapped with a cylindrical concave part serving as a hollow part,
the circumferential wall and the other end wall of the 2 nd rotor core include a cylindrical recess serving as a hollow portion.
4. The hybrid stepping motor as claimed in claim 3,
a tapered portion is provided on an inner peripheral wall rising portion of the recess portion of each of the 1 st rotor core and the 2 nd rotor core.
5. The hybrid stepping motor according to claim 1 or 2,
the 1 st rotor core and the 2 nd rotor core are each surrounded by a plurality of hollow portions arranged in a circumferential direction around the rotation axis.
6. The hybrid stepping motor according to claim 1,
the 1 st rotor core and the 2 nd rotor core each include a plurality of hollow portions arranged in an axial direction of the rotating shaft.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018-178340 | 2018-09-25 | ||
| JP2018178340A JP2020054029A (en) | 2018-09-25 | 2018-09-25 | Hybrid type stepping motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110943594A true CN110943594A (en) | 2020-03-31 |
Family
ID=69905986
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910904033.1A Withdrawn CN110943594A (en) | 2018-09-25 | 2019-09-24 | Hybrid stepping motor |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2020054029A (en) |
| CN (1) | CN110943594A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1407696A (en) * | 2001-08-28 | 2003-04-02 | 日本伺服株式会社 | Three-phase hybrid step motor |
| CN101064464A (en) * | 2006-02-28 | 2007-10-31 | 日本伺服株式会社 | Hybrid permanent magnet type electric rotating machine and manufacturing method thereof |
| CN102655365A (en) * | 2012-04-19 | 2012-09-05 | 常州市常华电机有限公司 | Hybrid stepping motor |
| CN103560642A (en) * | 2010-06-11 | 2014-02-05 | 日本电产伺服有限公司 | Rotary electric machine |
| CN206117336U (en) * | 2016-10-31 | 2017-04-19 | 常州富兴机电有限公司 | High -speed low inertia stepping motor rotor that is just reversing |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0757086B2 (en) * | 1985-09-27 | 1995-06-14 | 株式会社テック | Hybrid type stepping motor |
| JP2725335B2 (en) * | 1988-12-27 | 1998-03-11 | 松下電器産業株式会社 | Magnetic encoder |
| JPH06209555A (en) * | 1993-01-08 | 1994-07-26 | Sony Corp | Stepping motor |
| JP4050359B2 (en) * | 1997-06-13 | 2008-02-20 | オリエンタルモーター株式会社 | Motor with built-in sensor |
| JP3770300B2 (en) * | 1999-03-17 | 2006-04-26 | セイコーエプソン株式会社 | Rotor and stepper motor |
-
2018
- 2018-09-25 JP JP2018178340A patent/JP2020054029A/en active Pending
-
2019
- 2019-09-24 CN CN201910904033.1A patent/CN110943594A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1407696A (en) * | 2001-08-28 | 2003-04-02 | 日本伺服株式会社 | Three-phase hybrid step motor |
| CN101064464A (en) * | 2006-02-28 | 2007-10-31 | 日本伺服株式会社 | Hybrid permanent magnet type electric rotating machine and manufacturing method thereof |
| CN103560642A (en) * | 2010-06-11 | 2014-02-05 | 日本电产伺服有限公司 | Rotary electric machine |
| CN102655365A (en) * | 2012-04-19 | 2012-09-05 | 常州市常华电机有限公司 | Hybrid stepping motor |
| CN206117336U (en) * | 2016-10-31 | 2017-04-19 | 常州富兴机电有限公司 | High -speed low inertia stepping motor rotor that is just reversing |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2020054029A (en) | 2020-04-02 |
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Application publication date: 20200331 |
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