CN104242584A - Motor - Google Patents
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- CN104242584A CN104242584A CN201410217952.9A CN201410217952A CN104242584A CN 104242584 A CN104242584 A CN 104242584A CN 201410217952 A CN201410217952 A CN 201410217952A CN 104242584 A CN104242584 A CN 104242584A
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- salient pole
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- salient
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Abstract
The invention relates to a motor which can lower sound volume generated during rotor acceleration or deceleration. In the motor (1), magnet (6) forms four pairs of S poles and N poles at equal angle intervals. In a stator iron core (8), ten salient poles (80) are formed at equal angle intervals. In the plurality of salient poles (80), two salient poles has a 72-degree angle position deviation, one is a first salient pole (81) equipped with a first coil (76) in a winding mode, and the other one is a second salient pole (82) equipped with a second coil (77) in a winding mode. The radial dimensions of the first salient pole (81) and the second salient pole (82) are longer than the radial dimensions of other salient poles (80). The radial dimension of the first coil (76) relative to the winding part of the first salient pole (81) and the radial dimension of the second coil (77) relative to the winding part of the second salient pole (82) are longer than the radial dimensions of other salient poles (80).
Description
Technical field
The present invention relates to the motor two salient pole in a kind of multiple salient pole of the stator core arranging along the side face of magnet being wound with coil.
Background technology
In the display unit such as automobile taximeter and clock, some employings are provided with the structure (with reference to No. 2013-57567th, Japanese Laid-Open Patent Publication) of pointer at the output shaft of motor.About the motor used in described display unit, once proposed multiple salient pole of a kind of side face along magnet configuration stator core, and two salient pole in multiple salient pole were wound with the structure (with reference to No. 4125371st, Japanese patent gazette) of coil.In the motor described in No. 4125371st, Japanese patent gazette, magnet outer peripheral face configuration three to or five pairs of S poles and N pole, the number of salient pole is set to 8, and two salient pole departing from 90 ° in angle position is wound with coil.
About the motor used in display unit described in No. 2013-57567th, Japanese Laid-Open Patent Publication etc., require not only to obtain the volume produced when enough magnetic torques can also be reduced in rotor acceleration or deceleration, but the motor described in No. 4125371st, Japanese patent gazette cannot fully meet described requirement.
Summary of the invention
In view of above problem, problem of the present invention is to provide a kind of motor of the volume produced when can be reduced in rotor acceleration or deceleration.
In order to solve the problem, the feature of motor involved in the present invention is that it has: rotor, its have side face circumferentially alternately angularly compartment of terrain be provided with the magnet of S pole and N pole, stator, it has stator core, first coil and the second coil, described stator core is circumferentially configured at across multiple salient pole that gap is opposed with described side face, described first coil is wound on the first salient pole in described multiple salient pole, second salient pole that circumferentially with described first salient pole be separated of described second coil winding in described multiple salient pole, in described magnet, be formed with four to described S pole and described N pole, in described stator core, angularly compartment of terrain is formed with ten described salient pole, the angle position of described first salient pole and described second salient pole circumferentially departs from 72 °.
In motor involved in the present invention, magnet angularly compartment of terrain is formed with four pairs of S poles and N pole, and in stator core, angularly compartment of terrain is formed with ten salient pole.Therefore, the rotation of rotor can obtain enough magnetic torques.Further, about the motor of described structure, by checking starting torque relative to the change of electric angle, find compared to formed in magnet three to or five pairs of S poles and N pole, in stator core, be formed with the motor of eight salient pole, the change of starting torque is less.Therefore, because the vibration of rotor is less, therefore, it is possible to the volume produced when being reduced in rotor acceleration or deceleration, thus low noise can be realized.
In the present invention, preferred described stator core is formed by multiple magnetic sheets stacked.According to described structure, even if when salient pole is more, because when magnetic sheet stamping-out being become the shape of stator core, magnetic sheet is thinner, therefore, it is possible to efficiently and accurately stamping-out magnetic sheet.
In the present invention, preferably in described multiple salient pole, the radial dimension of described first salient pole and described second salient pole than the radial ruler modest ability of other salient pole, described first coil relative to the radial dimension of the winding part of described first salient pole and described second coil relative to the radial dimension of the winding part of described second salient pole than the radial ruler modest ability of other salient pole described.According to described structure, the winding number of coil fully can be guaranteed.
In the present invention, the gear reduction of the rotation deceleration transmission making described rotor is preferably provided with.According to described structure, need at the outer setting gear reduction of motor.
In motor involved in the present invention, magnet angularly compartment of terrain is formed with four pairs of S poles and N pole, is formed with ten salient pole in stator core moderate angles compartment of terrain.Therefore, the rotation of rotor can obtain enough magnetic torques.Further, in the motor of described structure, by checking starting torque relative to the change of electric angle, find be formed in magnet three to or five pairs of S poles and N pole, and compare at the motor that stator core is formed with eight salient pole, the change of starting torque is less.Therefore, because the vibration of rotor is less, therefore, it is possible to the volume that reduction rotor produces when acceleration or deceleration, thus low noise can be realized.
Accompanying drawing explanation
Fig. 1 (a) ~ Fig. 1 (c) is the use of the key diagram of motor of the present invention.
Fig. 2 (a) ~ Fig. 2 (c) illustrates by simulating the chart employing the result of the characteristic of motor of the present invention of trying to achieve.
Fig. 3 (a), Fig. 3 (b) are the key diagrams relative to the motor involved by comparative example of the present invention.
Fig. 4 (a) ~ Fig. 4 (c) is the chart of the result of the characteristic that the motor involved by the comparative example of the present invention 1 shown in Fig. 3 (a) of being tried to achieve by simulation is shown.
Fig. 5 (a) ~ Fig. 5 (c) is the chart of the result of the characteristic that the motor involved by the comparative example of the present invention 2 shown in Fig. 3 (b) of being tried to achieve by simulation is shown.
Embodiment
Below, be described employing motor of the present invention with reference to accompanying drawing.
(explanation of motor)
Fig. 1 (a) ~ Fig. 1 (c) is the use of the key diagram of motor of the present invention, and Fig. 1 (a) is the vertical view of motor, and Fig. 1 (b) is the end view of motor, and Fig. 1 (c) is the vertical view of stator etc.
As shown in Fig. 1 (a), Fig. 1 (b), the motor 1 of present embodiment has housing 3, supported the rotor 5 for rotating by housing 3 and be configured in the stator 7 of surrounding of rotor 5.In the present embodiment, bolster 51 is fixed on housing 3, and the supporting of rotor 5 support shaft 51 is for rotating.Therefore, rotor 5 is supported as rotating by housing 3 by bolster 51.Further, motor 1 has the reduction gear 9 of the rotation deceleration transmission making rotor 5, and described reduction gear 9 is also identical with rotor 5 and stator 7 to be supported by housing 3.In addition, the rotation of rotor 5 is delivered to output shaft 90 by reduction gear 9.
Rotor 5 have support shaft 51 support for can rotate pinion 53, integrated with pinion 53 and outer peripheral face 60 (side face) circumferentially replace angularly compartment of terrain be provided with the magnet 6 of S pole and N pole.In addition, the magnet 6 of present embodiment is cylindric.In the present embodiment, magnet 6 and pinion 53 are molding by insert and are integrated.Therefore, magnet 6 is combined by resinous plectane portion 50 with pinion 53.In the present embodiment, magnet 6 is ferrite system.
Stator 7 comprises and having with the outer peripheral face 60 (side face) of magnet 6 across the opposed stator core 8 of multiple salient pole 80 in gap, the first coil 76 of the first salient pole 81 be wound in multiple salient pole 80 and the second coil 77 being wound on the second salient pole 82 in multiple salient pole 80.In addition, in more detail, the first coil 76 is wound in the first salient pole 81, second coil 77 across insulating part 71 and is wound in the second salient pole 82 across insulating part 72.Maintain the terminal 710 to two power supplies that the first coil 76 is powered in the end of insulating part 71, maintain the terminal 720 to two power supplies that the second coil 77 is powered in the end of insulating part 72.The winding being wound with the first coil 76 at terminal 710,720 starts and the winding of the reel end of terminating and the second coil 77 starts and the end of the end that reel.
Reduction gear 9 has second gear 92 in the first gear 91 and large footpath, described first gear 91 has the large diameter gear 91a engaged with pinion 53, second gear 92 in described large footpath engages with the small-diameter gear 91b of the first gear 91, and output shaft 90 is fixed on the second gear 92.
In the motor 1 so formed, by terminal 710,720, first coil 76 and the second coil 77 are provided to the driving pulse of each phase, rotor 5 is rotated, and by reduction gear 9, the rotation of rotor 5 is delivered to output shaft 90.Further, when using motor 1 to form the display unit of pointer-type, pointer (not shown) is fixed on output shaft 90.In described display unit, by being supplied to the driving pulse of the first coil 76 and the second coil 77 via terminal 710,720, switch the angle position of pointer.Now, after providing the driving pulse of positive rotation to make pointer be rotated clockwise to target location to terminal 710,720, terminal 710,720 is provided to the driving pulse stopped, then pointer can be made to stop at target location.Further, in this condition, if provide the driving pulse of reverse rotation to terminal 710,720, then pointer can be made to be rotated counterclockwise another target location.
(structure of magnet 6 and stator core 8)
As shown in Fig. 1 (c), in the motor 1 of present embodiment, magnet 6 circumferentially replaces angularly compartment of terrain at outer peripheral face 60 and is provided with S pole and N pole.In the present embodiment, in magnet 6, be formed with four pairs of S poles and N pole.Therefore, owing to being formed with S pole and the ends of the earth altogether, N pole in magnet 6 moderate angles compartment of terrain, therefore circumferentially adjacent S pole and the angle position of N pole depart from 45 °.
The part being configured with magnet 6 of stator core 8 becomes peristome 84, described peristome 84 inner peripheral circumferentially angularly compartment of terrain be formed towards the outstanding multiple salient pole 80 of the outer peripheral face 60 of magnet 6.The end of the radially inner side of salient pole 80 is opposed across gap with the outer peripheral face 60 of magnet 6, and the gap size between the end of the radially inner side of salient pole 80 and the outer peripheral face 60 of magnet 6 is all equal in multiple salient pole 80.In the present embodiment, the number of salient pole 80 is ten, and the angle position between circumferentially adjacent salient pole 80 departs from 36 ° mutually.In other words, in stator core 8, angularly compartment of terrain is formed with ten salient pole 80.
In the stator core 8 so formed, two salient pole 80 that the circumferentially angle position in multiple salient pole 80 departs from 72 ° use as the first salient pole 81 and the second salient pole 82.Namely, in multiple salient pole 80, the insulating part 71 that of departing from two salient pole 80 of 72 ° in angle position becomes the tubular being wound with the first coil 76 is embedded in the first salient pole 81 outside it, and another insulating part 72 becoming the tubular being wound with the second coil 77 is embedded in the second salient pole 82 outside it.In other words, the first salient pole 81 and the second salient pole 82 circumferentially depart from 72 ° in angle position.At this, the angle position of the first salient pole 81 and the second salient pole 82 is departed from 72 ° and is referred to that the angle position at the center of the center of the circumference of the first salient pole 81 and the circumference of the second salient pole 82 departs from 72 °.In addition, between the first salient pole 81 and the second salient pole 82, there is the salient pole 80 of the coil that do not reel.
In the present embodiment, the first salient pole 81 in multiple salient pole 80 and the radial dimension of the second salient pole 82 are than the radial ruler modest ability of other salient pole 80.Therefore, the first coil 76 relative to the radial dimension of the winding part of the first salient pole 81 and the second coil 77 relative to the radial dimension of the winding part of the second salient pole 82 than the radial ruler modest ability of other salient pole 80.In addition, the radial dimension of the first salient pole 81 and the second salient pole 82 is equal, and the first coil 76 is equal relative to the radial dimension of the winding part of the second salient pole 82 with the second coil 77 relative to the radial dimension of the winding part of the first salient pole 81.
The length dimension of the salient pole 80 that the radial dimension of the first salient pole 81 in multiple salient pole 80 and the salient pole 80 beyond the second salient pole 82 outer peripheral face 60 namely from connecting portion 85 described later towards magnet 6 is outstanding is all equal, the end of the radial outside of the salient pole 80 therefore beyond the first salient pole 81 and the second salient pole 82 be in and magnet 6 at a distance of the position of same distance.On the other hand, because the radial dimension of the first salient pole 81 and the second salient pole 82 is than the radial ruler modest ability of other salient pole 80, therefore the end of the end of the radial outside of the first salient pole 81 and the radial outside of the second salient pole 82 is than the position of end by leaving from magnet 6 to radial outside of the radial outside of other salient pole 80.
At this, stator core 8 has the connecting portion 85 connecting and comprise the frame-shaped of the end of the radial outside of all salient pole 80 of the first salient pole 81 and the second salient pole 82, and the width dimensions of described connecting portion 85 is equal along complete cycle.Therefore, connecting portion 85 becomes the concentric arc sections 86 with magnet 6 beyond the angular range being formed with the first salient pole 81 and the second salient pole 82.On the other hand, the angular range being formed with the first salient pole 81 of connecting portion 85 becomes to the outstanding rectangular portion 87 of the rectangular frame-shaped of radial outside, and the angular range being formed with the second salient pole 82 becomes to the outstanding rectangular portion 88 of the rectangular frame-shaped of radial outside.Further, becoming to radially inner side between rectangular portion 87,88 is the V word section 89 that V shape caves in, and the salient pole 80 between the first salient pole 81 and the second salient pole 82 is outstanding from the inner edge of described V word section 89 towards radially inner side.
In the present embodiment, stator core 8 in tabular, by stacked multiple be punched as the magnetic sheet of above-mentioned shape and forming.In other words, stator core 8 is formed by multiple magnetic sheets stacked.
(evaluation result of motor 1)
Fig. 2 (a) ~ Fig. 2 (c) illustrates by simulating the chart employing the result of the characteristic of motor 1 of the present invention of trying to achieve, Fig. 2 (a) is the chart of the relation illustrated between the electric angle of motor 1 and starting torque (detent torque), Fig. 2 (b) is the chart of the relation illustrated between the electric angle of motor 1 and magnetic torque, and Fig. 2 (c) illustrates that expression is radially applied to the chart of the lee sajous graphics of the electromagnetic force of rotor 5.In addition, in Fig. 2 (c), with a direction orthogonal with the pivot axis of rotor 5 for X-direction, to be applied to the power of rotor 5 along described X-direction for transverse axis.Further, in Fig. 2 (c), with the orthogonal direction of the pivot axis and X-direction with rotor 5 for Y direction, to be applied to the power of rotor 5 along described Y direction for the longitudinal axis.Further, in the motor 1 for evaluating, stator core 8 by by thickness be the non-oriented electromagnetic steel sheet having stamping-out of 0.5mm become above-mentioned shape and stacked three form.The internal diameter of magnet 6 is 6mm, and external diameter is 8mm, and axial dimension is 3mm.Diameter is that winding wire winding 2200 circle of 0.055mm is formed by the first coil 76 and the second coil 77 respectively, and the resistance value of one phase is 220 Ω.Driving voltage is 5V.
Fig. 3 (a), Fig. 3 (b) are the key diagrams relative to the motor 1 involved by comparative example of the present invention, in this motor 1, also obtain characteristic by simulation.In the motor involved by the first comparative example shown in Fig. 3 (a), form three pairs of S poles and N pole at magnet 6, in stator core 8, angularly compartment of terrain is formed with eight salient pole 80.Further, the first salient pole 81 being wound with the first coil 76 departs from 90 ° with the angle position of the second salient pole 82 being wound with the second coil 77.
In the motor involved by the second comparative example shown in Fig. 3 (b), be formed with five pairs of S poles and N pole at magnet 6, and in stator core 8, be formed with eight salient pole 80.Further, the first salient pole 81 being wound with the first coil 76 departs from 90 ° with the angle position of the second salient pole 82 being wound with the second coil 77.At this, salient pole 80 unequal interval ground is formed, but when the center of the circumference of a salient pole in the first salient pole 81 and the second salient pole 82 is opposed with the boundary member between S pole with N pole, the center of the circumference of the center of the circumference of another salient pole and the center of the circumference of S pole or N pole is opposed, does not therefore hinder the generation of magnetic torque.
Fig. 4 (a) ~ Fig. 4 (c) is the chart of the result of the characteristic that the motor involved by the first comparative example of the present invention shown in Fig. 3 (a) of being tried to achieve by simulation is shown, Fig. 4 (a) is the chart of the relation illustrated between the electric angle of motor and starting torque, Fig. 4 (b) is the chart of the relation illustrated between the electric angle of motor and driving torque, and Fig. 4 (c) illustrates that expression is radially applied to the chart of the lee sajous graphics of the electromagnetic force of rotor 5.Fig. 5 (a) ~ Fig. 5 (c) is the chart of the result of the characteristic that the motor involved by the second comparative example of the present invention shown in Fig. 3 (b) of being tried to achieve by simulation is shown, Fig. 5 (a) is the chart of the relation illustrated between the electric angle of motor and starting torque, Fig. 5 (b) is the chart of the relation illustrated between the electric angle of motor and driving torque, and Fig. 5 (c) illustrates that expression is radially applied to the chart of the lee sajous graphics of the electromagnetic force of rotor 5.
In addition, Fig. 4 (a) and Fig. 5 (a) is the data corresponding with Fig. 2 (a), Fig. 4 (b) and Fig. 5 (b) is the data corresponding with Fig. 2 (b), and Fig. 4 (c) and Fig. 5 (c) is the data corresponding with Fig. 2 (c).
At this, the motor involved by the first comparative example shown in Fig. 3 (a) and the motor involved by the second comparative example shown in Fig. 3 (b) and use motor 1 of the present invention are identical in the basic structures such as the size of magnet 6 and the size of stator core 8, only have the number of poles of magnet 6 not identical with the number of salient pole 80.
Result shown in result shown in comparison diagram 2 (a) and Fig. 4 (a) and the result shown in Fig. 5 (a) known, compared to the motor involved by the first comparative example and the motor involved by the second comparative example, in use motor 1 of the present invention, the variable quantity of starting torque is less.Therefore, the external force being applied to rotor 5 is less, so can say that vibration is also less.
Next, result shown in result shown in comparison diagram 2 (b) and Fig. 4 (b) is known, compared to the motor involved by the first comparative example, in use motor 1 of the present invention, magnetic torque is less, even so, the enough magnetic torques needed for rotation of rotor 5 can also be obtained.Further, in use motor 1 of the present invention, the change of magnetic torque is identical with the motor involved by the first comparative example.
In addition, the result shown in the result shown in comparison diagram 2 (b) and Fig. 5 (b), magnetic torque on level terms.Further, compared to the motor involved by the first comparative example, use the change of the magnetic torque of motor 1 of the present invention slightly large, but both differences are less, alternatively both are equal.
Result shown in result shown in comparison diagram 2 (c) and Fig. 4 (c) is known, and compared to the motor involved by the first comparative example, in use motor 1 of the present invention, the external force being radially applied to rotor 5 is less.Therefore, compared to the motor involved by the first comparative example, in use motor 1 of the present invention, because the external force being radially applied to rotor 5 is less, therefore can say that vibration is less.
In addition, the result shown in the result shown in comparison diagram 2 (c) and Fig. 5 (c) is known, compared to the motor involved by the first comparative example, in use motor 1 of the present invention, the power being radially applied to rotor 5 is slightly large, but both differences are less, and alternatively both are equal.
(main efficacy results of present embodiment)
As described above, in the motor 1 of present embodiment, magnet 6 angularly compartment of terrain is formed with four pairs of S poles and N pole, and in stator core 8, angularly compartment of terrain is formed with ten salient pole 80.Therefore, it is possible to obtain the magnetic torque needed for rotation of motor 1.And, about the motor 1 of described structure, by the change etc. of checking starting torque relative to electric angle, find illustrated by reference Fig. 2 (a), Fig. 4 (a) and Fig. 5 (a), compared to be formed at magnet 6 three to or five pairs of S poles and N pole, in stator core 8, be formed with the motor involved by comparative example 1,2 of eight salient pole 80, the change of starting torque is less.Therefore, in the motor 1 of present embodiment, because the vibration of rotor 5 is less, therefore, it is possible to the volume that reduction rotor 5 produces when acceleration or deceleration, thus low noise can be realized.
Further, stator core 8 is formed by multiple magnetic sheets stacked.Therefore, as in the embodiment described in, even if salient pole 80 is more, because when magnetic sheet stamping-out being become the shape of stator core 8, magnetic sheet is thinner, therefore also can stamping-out magnetic sheet accurately.
And, the first salient pole 81 in multiple salient pole 80 and the radial dimension of the second salient pole 82 than the radial ruler modest ability of other salient pole 80, the first coil 76 relative to the radial dimension of the winding part of the first salient pole 81 and the second coil 77 larger than the radial dimension of other salient pole 80 relative to the radial dimension of the winding part of the second salient pole 82.Therefore, it is possible to reliably obtain the magnetic torque needed for rotation of motor 1.
Further, owing to being provided with the gear reduction 9 of the rotation of transmitting rotor 5 of slowing down at motor 1, therefore need at the outer setting gear reduction 9 of motor 1.Therefore, at output shaft 90, pointer is installed by means of only in the motor 1 of present embodiment, just can forms the key component of display unit, thus the miniaturization of display unit can be realized.
(other execution modes)
In the above-described embodiment, be positioned at the structure of the inner side of stator 7 for rotor 5, but the motor being arranged in the outside of stator 7 at rotor 5 also can apply the present invention.Now, salient pole 80 is for from stator core 8 structure outstanding and opposed with the inner peripheral surface (side face) of magnet 6 to radial outside.
Claims (4)
1. a motor, is characterized in that,
Described motor has:
Rotor, its have side face circumferentially alternately angularly compartment of terrain be provided with the magnet of S pole and N pole; And
Stator, it has stator core, the first coil and the second coil, described stator core is circumferentially configured at across multiple salient pole that gap is opposed with described side face, described first coil is wound on the first salient pole in described multiple salient pole, second salient pole that circumferentially with described first salient pole be separated of described second coil winding in described multiple salient pole
In described magnet, be formed with four to described S pole and described N pole,
In described stator core, angularly compartment of terrain is formed with ten described salient pole,
The angle position of described first salient pole and described second salient pole circumferentially departs from 72 °.
2. motor according to claim 1, is characterized in that,
Described stator core is formed by multiple magnetic sheets stacked.
3. motor according to claim 1 and 2, is characterized in that,
Described first salient pole in described multiple salient pole and the radial dimension of described second salient pole than the radial ruler modest ability of other salient pole,
Described first coil relative to the radial dimension of the winding part of described first salient pole and described second coil relative to the radial dimension of the winding part of described second salient pole than the radial ruler modest ability of other salient pole described.
4. motor according to claim 1 and 2, is characterized in that,
Described motor is provided with the gear reduction of the rotation deceleration transmission making described rotor.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013123287A JP6208985B2 (en) | 2013-06-12 | 2013-06-12 | motor |
| JP2013-123287 | 2013-06-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104242584A true CN104242584A (en) | 2014-12-24 |
Family
ID=51609496
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410217952.9A Pending CN104242584A (en) | 2013-06-12 | 2014-05-22 | Motor |
| CN201420263349.XU Expired - Fee Related CN203859659U (en) | 2013-06-12 | 2014-05-22 | Motor |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420263349.XU Expired - Fee Related CN203859659U (en) | 2013-06-12 | 2014-05-22 | Motor |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6208985B2 (en) |
| CN (2) | CN104242584A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021035985A1 (en) * | 2019-08-23 | 2021-03-04 | 广东美的生活电器制造有限公司 | Rotor, electric motor, electric motor assembly, food processor, and air supply device |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0617378U (en) * | 1992-07-27 | 1994-03-04 | 株式会社コパル | PM type step motor |
| FR2754953B1 (en) * | 1996-10-21 | 1999-02-26 | Moving Magnet Tech | POLYPHASE MOTOR, PARTICULARLY FOR DRIVING A DISPLAY HAND |
| JP2002354777A (en) * | 2001-03-23 | 2002-12-06 | Tdk Corp | Stepping motor |
| JP4206713B2 (en) * | 2002-09-05 | 2009-01-14 | 株式会社デンソー | Indicating instrument |
| JP5020649B2 (en) * | 2007-01-31 | 2012-09-05 | 日本電産コパル株式会社 | Stepping motor and camera diaphragm device |
| US20080224573A1 (en) * | 2007-03-13 | 2008-09-18 | I-Te Chang | Step motor |
-
2013
- 2013-06-12 JP JP2013123287A patent/JP6208985B2/en not_active Expired - Fee Related
-
2014
- 2014-05-22 CN CN201410217952.9A patent/CN104242584A/en active Pending
- 2014-05-22 CN CN201420263349.XU patent/CN203859659U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021035985A1 (en) * | 2019-08-23 | 2021-03-04 | 广东美的生活电器制造有限公司 | Rotor, electric motor, electric motor assembly, food processor, and air supply device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6208985B2 (en) | 2017-10-04 |
| JP2014241684A (en) | 2014-12-25 |
| CN203859659U (en) | 2014-10-01 |
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Application publication date: 20141224 |
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| RJ01 | Rejection of invention patent application after publication |