CN1314184C - Motor and structure of its stator and rotor - Google Patents
Motor and structure of its stator and rotor Download PDFInfo
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- CN1314184C CN1314184C CNB2004100368876A CN200410036887A CN1314184C CN 1314184 C CN1314184 C CN 1314184C CN B2004100368876 A CNB2004100368876 A CN B2004100368876A CN 200410036887 A CN200410036887 A CN 200410036887A CN 1314184 C CN1314184 C CN 1314184C
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Abstract
The present invention relates to a motor, a stator structure and a rotor structure, wherein the rotor structure comprises a rotating shaft and a magnet; the magnet encircles the rotating shaft and is magnetized in a radial direction or an axial direction. The stator structure comprises a casing tube, a first ring and a second ring, wherein the first ring is arranged at one opening of the casing tube, and the second ring is arranged at the other opening of the casing tube. The first ring is provided with N first protruding parts which are mutually separate and coplanar and extend from the first ring; the second ring is provided with N second protruding parts which are mutually separate and coplanar and extend from the second ring; each of the first protruding parts corresponds to each of the second protruding parts. The motor of the present invention has the advantages of compact structure and miniature size.
Description
Technical field
The present invention relates to a kind of motor and stator thereof and rotor structure, refer to a kind of Brushless DC motor and stator thereof and rotor structure especially.
Background technology
Its stator of traditional Brushless DC motor is made of several magnetic poles, and the central part on the shell also has a hole, and wherein each magnetic pole of stator all makes a T font, and is all twining one coil on the magnetic arm of each magnetic pole; Its price of stator of Zhi Zuoing and winding around is comparatively expensive by this way.
Please refer to United States Patent (USP) 4,987, No. 331, it provides a kind of known Brushless DC motor, this Brushless DC motor has a kind of stator of Improvement type, this stator is made of a matrix, a coil that is wound in this matrix, two groups of magnetic pole plate made from plastic material and the circuit board that is connected in one side of this matrix, and wherein every group of magnetic pole plate formation is fixed in a pair of magnetic pole on these substrate two limits, and two groups of magnetic pole plate position of magnetic pole that staggers each other; This stator structure that staggers a magnetic pole makes that its corresponding rotor magnetite must be the adjacent endless belt of magnetic of radial magnetizing and N and S.
This quite different with conventional art through the motor configuration that improves, its included rotor is a magnetic stripe through radial magnetizing, the N that this magnetic stripe had, S magnetic are spaced in mode adjacent one another are, constitute this stator jointly and a spool of this coil and magnetic are connected in this group magnetic pole plate of a metal axle sleeve, constituted and upper and lower magnetic pole plate all is a mode with the mutual storehouse of pole piece of multi-disc.When this coil is energized and produces magnetic field, by the assistance of this magnetic pole plate, on this metal axle sleeve, also can produce magnetic field, make this rotor around rotating shaft that it had and rotate.In addition, this stator also can adopt single silicon steel to make in the mode of one-body molded punching press.
Yet aforesaid known technology still has the shortcoming that the motor volume is big and operational paradigm is unclear.
Summary of the invention
Main purpose of the present invention is for a kind of new stator and rotor structure are provided, to improve the efficient of Brushless DC motor.
Secondary objective of the present invention is for providing a kind of motor that has structure more closely and have more mini volume than known technology.
According to the present invention, a kind of motor is provided, comprise: a rotor structure, comprise a rotating shaft and a magnetite, this magnetite is to surround this rotating shaft, and this magnetite can be divided into two by the plane perpendicular to this rotating shaft partly, and every part all comprises 2N magnetic region in correspondence with each other, and each this magnetic region has the magnetic opposite with the magnetic region of adjacency, and with this plane vertical direction in correspondence with each other magnetic region have opposite magnetic; One stator structure, comprise a sleeve pipe, one first ring and one second ring, this first ring and this second ring are an opening and another openings that lays respectively at this sleeve pipe, and this first ring and this second ring also have N first protuberance and N second protuberance respectively, individual first protuberance each interval of this N and copline ground extend out from this first ring, individual second protuberance each interval of this N and copline ground extend out from this second ring, and the position of each this first protuberance is the position corresponding to each this second protuberance; And a coil, be wound on this sleeve pipe; Wherein, when giving this stator structure energy to this coil electricity, each this first protuberance promptly has this second protuberance opposite magnetic corresponding with each because of induction, makes this rotor structure around this rotating shaft and rotating, and N is one greater than 1 integer.
According to the present invention, a kind of motor is provided, comprise: a rotor structure, comprise a rotating shaft and a magnetite, this magnetite is to surround this rotating shaft, and this magnetite comprises 2N axial magnetic region in correspondence with each other, and an end of each this axial magnetic region has the magnetic opposite with the other end, and an end of each this axial magnetic region has the opposite magnetic of corresponding end with the magnetic region of adjacency; One stator structure, comprise a sleeve pipe, one first ring and one second ring, this first ring and this second ring are an opening and another openings that lays respectively at this sleeve pipe, and this first ring and this second ring also have N first protuberance and N second protuberance respectively, individual first protuberance each interval of this N and copline ground extend out from this first ring, individual second protuberance each interval of this N and copline ground extend out from this second ring, and the position of each this first protuberance is the position corresponding to each this second protuberance; And a coil, be wound on this sleeve pipe; Wherein, when giving this stator structure energy to this coil electricity, each this first protuberance promptly has this second protuberance opposite magnetic corresponding with each because of induction, makes this rotor structure around this rotating shaft and rotating, and N is one greater than 1 integer.
According to the present invention, a kind of rotor structure is provided, comprising: an enclosing cover, have a rotating shaft and a sidewall, this sidewall is encirclement and is parallel to this rotating shaft; And a magnetite, being connected in this sidewall and surrounding this rotating shaft, this magnetite is a radial magnetizing.
According to above-mentioned conception, wherein this enclosing cover is made of a magnetic permeable material.
According to above-mentioned conception, wherein this magnetite can be divided into two by the plane perpendicular to this rotating shaft partly, and every part all comprises several magnetic regions in correspondence with each other, and each this magnetic region has the magnetic opposite with the magnetic region of adjacency.
According to above-mentioned conception, wherein the magnetic region number that every part had of this magnetite is all 2N, and N is one greater than 1 integer.
According to above-mentioned conception, wherein in correspondence with each other magnetic region has opposite magnetic in vertical direction.
According to main purpose of the present invention, a kind of rotor structure is provided, comprising: an enclosing cover, have a rotating shaft and a sidewall, this sidewall is encirclement and is parallel to this rotating shaft; And a magnetite, being connected in this sidewall and surrounding this rotating shaft, this magnetite is an axial charging.
According to above-mentioned conception, wherein this enclosing cover can be made of a non-magnetic permeable material.
According to above-mentioned conception, wherein this magnetite comprises several axial magnetic regions in correspondence with each other, and an end of each this axial magnetic region has the magnetic opposite with the other end.
According to above-mentioned conception, wherein the number of this axial magnetic region is 2N, and N is one greater than 1 integer.
According to above-mentioned conception, wherein an end of each this axial magnetic region has the opposite magnetic of corresponding end with the magnetic region of adjacency.
According to the present invention, a kind of stator structure is provided, comprising: a sleeve pipe; One first ring is positioned at an opening of this sleeve pipe, and this first ring has N first protuberance, and this N first protuberance is that each interval and copline ground extend out from this first ring; And one second ring, being positioned at another opening of this sleeve pipe, this second ring has N second protuberance, and this N second protuberance is that each interval and copline ground extend out from this second ring; Wherein, the position of each this first protuberance is the position corresponding to each this second protuberance, and N is one greater than 1 integer.
According to above-mentioned conception, wherein this sleeve pipe is made of a permeability magnetic material.
According to above-mentioned conception, wherein this first protuberance and this second protuberance are to be eccentric in same direction.
According to above-mentioned conception, wherein this first ring and this first protuberance form magnetic sheet on, and this second ring and this second protuberance form magnetic sheet, and should to go up magnetic sheet and this time magnetic sheet all be that silicon steel by the M layer is constituted, and M is one greater than zero integer.
According to above-mentioned conception, wherein this stator structure is to be made in one-body molded mode by a magnetic permeable material.
According to above-mentioned conception, wherein this magnetic permeable material is a silicon steel.
Can more in depth understand the present invention by following accompanying drawing and detailed description.
Description of drawings
Fig. 1 (a) is the perspective view of rotor structure one preferred embodiment of Brushless DC motor of the present invention;
Fig. 1 (b) is the stereogram of the magnetite of diametrical magnetization of the present invention;
Fig. 1 (C) is the stereogram of the magnetite of axial magnetized of the present invention;
Fig. 2 (a) is the exploded view of stator structure one first preferred embodiment of Brushless DC motor of the present invention;
Fig. 2 (b) is the stereogram of the stator structure of Fig. 2 (a);
Fig. 3 is the exploded view of Brushless DC motor of the present invention;
Fig. 4 is the magnetite of Brushless DC motor of the present invention and the top view of magnetic pole plate;
Fig. 5 (a) and Fig. 5 (b) are the illustrative view of the magnetic pole plate of the magnetite of radial magnetizing of Brushless DC motor of the present invention and different directions off-centre;
Fig. 6 (a) and Fig. 6 (b) are the illustrative view of the magnetic pole plate of the magnetite of axial charging of Brushless DC motor of the present invention and different directions off-centre;
Fig. 7 (a) is the motor profile that cooperates Fig. 5 (a) and Fig. 5 (b);
Fig. 7 (b) is the motor profile that cooperates Fig. 6 (a) and Fig. 6 (b);
Fig. 8 is the stereogram of stator structure one second preferred embodiment of Brushless DC motor of the present invention; And
Fig. 9 is the stereogram of stator structure 1 the 3rd preferred embodiment of Brushless DC motor of the present invention.
Wherein, description of reference numerals is as follows:
The 1-rotor structure; The 11-rotating shaft; Magnetic stripe under the 12-; The 121-magnetic region; The last magnetic stripe of 13-;
The 131-magnetic region; The 132-magnetic region; The 14-enclosing cover; The 15-magnetite; The 16-sidewall;
The 17-magnetite; The 171-magnetic region; The 172-magnetic region; 1711-one end; The 1712-other end;
The 1721-other end; 1722-one end; The last magnetic sheet of 2-; 21-first protuberance;
210-extends protuberance; The 22-opening; 23-first ring; The 3-insulating barrier; The 31-opening;
Magnetic sheet under the 4-; 41-second protuberance; 410-extends protuberance; The 42-opening; 43-second ring;
The 5-sleeve pipe; The 51-opening; Another opening of 52-; The 6-coil; The 7-circuit board;
The 8-stator seat; The 81-base; The 82-cylinder.
Embodiment
See also Fig. 1 (a), it is the perspective view of rotor structure one preferred embodiment of Brushless DC motor of the present invention, wherein rotor structure 1 is made of an enclosing cover 14, a magnetite 15 and a rotating shaft 11, enclosing cover 14 has a sidewall 16 that surrounds and be parallel to rotating shaft 11, and magnetite 15 is to surround rotating shaft 11 and be connected in sidewall 16.
See also Fig. 1 (b), it is the stereogram of the magnetite 15 of Fig. 1 (a), wherein magnetite 15 is radial magnetizings, magnetite 15 can be divided on one magnetic stripe 13 and magnetic stripe 12 once by the plane perpendicular to rotating shaft 11, last magnetic stripe 13 and following magnetic stripe 12 all comprise the magnetic region of 8 correspondences, each magnetic region has the magnetic opposite with the magnetic region of adjacency, and in correspondence with each other magnetic region has opposite magnetic in vertical direction; For instance, shown in Fig. 1 (b), the magnetic of magnetic region 131 is opposite with the magnetic of magnetic region 132 and 121, that is if the magnetic of magnetic region 131 is N, magnetic region 132 and 121 magnetic are S.
See also Fig. 1 (c), it is the stereogram of another kind of magnetite of the present invention, and wherein magnetite 17 is axial chargings, that is except the mode that magnetizes of Fig. 1 (b), also magnetite 17 can be magnetized in the mode as Fig. 1 (c).Magnetite 17 comprises the axial magnetic region of 8 correspondences, and the magnetic of an end 1711 of magnetic region 171 is opposite with the magnetic that makes an end 1712, and particularly, an end of each this axial magnetic region has the opposite magnetic of corresponding end with the magnetic region of adjacency; Shown in Fig. 1 (c), the magnetic of an end 1711 of magnetic region 171 is if S, and then the magnetic of the other end 1712 is N; Similarly, the magnetic of the other end 1712 of magnetic region 171 is if N, and then the magnetic with an end 1722 of adjacent magnetic region 172, magnetic region 171 is S, and the magnetic of the other end 1721 is N.
If magnetite is a radial magnetizing,, that is have two magnetic stripes 12 and 13 just then the magnetic region distributes shown in Fig. 1 (b); If magnetite is an axial charging,, that is only has a magnetic stripe 17 just then the magnetic region distributes shown in Fig. 1 (c).
See also Fig. 2 (a), it is the exploded view of stator structure one first preferred embodiment of Brushless DC motor of the present invention, wherein stator structure be by magnetic sheet 2 on, a sleeve pipe 5 and once magnetic sheet 4 constituted, last magnetic sheet 2 has 23 and four first protuberances 21 of one first ring, four first protuberance 21 each intervals and copline ground extend out from first ring 23, and last magnetic sheet 2 is to encircle 23 by first to be connected with sleeve pipe 5 and to be positioned on the opening 51; Similarly, following magnetic sheet 4 has one second ring 41, four second protuberance 41 each intervals of 43 and four second protuberances and copline ground and extends out from second ring 43, and following magnetic sheet 4 is to be connected with sleeve pipe 5 and to be positioned on another opening 52 by second ring 43.
More special place is, for starting unidirectional Brushless DC motor of the present invention smoothly, first protuberance 21 and second protuberance 41 of this stator structure must be eccentric in same direction, and its details will be discussed in the back.
About the manufacturing materials of stator structure, sleeve pipe 5 can be made of a permeability magnetic material, and stator structure can be by a magnetic permeable material (for example: silicon steel) make in one-body molded mode.
Fig. 2 (b) is the stator structure stereogram of Fig. 2 (a), the position of each first protuberance 21 is the positions corresponding to each second protuberance 41, particularly, the magnetic moment performance that produces in order to improve, last magnetic sheet 2 and following magnetic sheet 4 all can be formed by several layers silicon steel institute storehouse.
It should be noted that, magnetite 15 for radial magnetizing, last magnetic stripe 13 or down the magnetic region number of magnetic stripe 12 are two times of number of first protuberance 21 or second protuberance 41, that is to say, if the number of first protuberance 21 or second protuberance 41 is N, the magnetic region number of last magnetic stripe 13 or following magnetic stripe 12 is 2N, and wherein N is the integer greater than 1.
In addition, for the magnetite 17 of axial charging, the number of magnetic region 171 also is two times of number of first protuberance 21 or second protuberance 41, that is to say, if the number of first protuberance 21 or second protuberance 41 is N, the number of magnetic region 171 also is 2N, and wherein N is the integer greater than 1.
See also Fig. 3, it is the exploded view of Brushless DC motor of the present invention, for the convenience on narrating, is to do explanation with the magnetite 15 of radial magnetizing in the rotor structure.
Brushless DC motor among Fig. 3 is made of rotor structure 1, last magnetic sheet 2, insulating barrier 3, following magnetic sheet 4, sleeve pipe 5, coil 6, circuit board 7 and stator seat 8.
The insulating barrier 3 that is twined by coil 6 can be made of plastics, and insulating barrier 3 also has an opening 31 in order to hold sleeve pipe 5 in wherein, to constitute the required magnetic flux path of rotor structure 1 desire rotation.
Secondly, last magnetic sheet 2 and following magnetic sheet 4 also respectively have opening 22 and 42 and pass for stator seat 8, last magnetic sheet 2 is identical on magnetic with following magnetic sheet 4, that is the two is to overlap mutually in axial mode, comprise a base 81 and a cylinder 82 by the stator seat 8 that non-magnetic permeable material constituted, insulating barrier 3 is to be sheathed on first protuberance 21, second protuberance 41, and sleeve pipe 5, to separate coil 6 and this stator structure, stator seat 8 is to pass the also perforation of fixing circuit board 7 from the center of base with cylinder 82, opening 42, sleeve pipe 5 and insulating barrier 3, and opening 22, last cylinder 82 can hold rotating shaft 11, and circuit board 7 more can comprise an electronic circuit, in order to detect and to control the magnetic field that this stator structure produces.
Fig. 4 is the magnetite of Brushless DC motor of the present invention and the top view of magnetic pole plate, and between last magnetic sheet 2 and last magnetic stripe 13 is air chamber, and upward four first protuberances 21 of magnetic sheet 2 all point to the last magnetic stripe 13 with same magnetic.As previously mentioned, four first protuberances 21 of last magnetic sheet 2 and four second protuberances 41 of following magnetic sheet 4 must be eccentric in same direction, first protuberance 21 and second protuberance 41 with same mode off-centre make air gap inhomogeneous, and the air gap under each stator is asymmetric, to start unidirectional d.c. motor of the present invention.
Fig. 5 (a) and Fig. 5 (b) are the illustrative view of the magnetic pole plate of the magnetite of the radial magnetizing of Brushless DC motor of the present invention and different directions off-centre, shown in Fig. 5 (a), first protuberance 21 and second protuberance 41 are to be eccentric in same direction, and first protuberance 21 and second protuberance 41 of Fig. 5 (b) then are eccentric in other direction.
When giving this stator structure energy to coil 6 energisings, each first protuberance 21 promptly has the opposite magnetic of corresponding with each second protuberance 41 because of induction, that is to say, if first protuberance 21 its magnetic after being endowed energy of last magnetic sheet 2 becomes N, then descend second protuberance, 41 its magnetic of magnetic sheet 4 promptly to become S, then rotor structure 1 just can move right to face next magnetic pole because of magnetic field, relend by the sense of current that changes coil 6, first protuberance 21 and second protuberance 41 magnetic each other can exchange, that is to say that this moment, the magnetic of first protuberance 21 became S, the magnetic of second protuberance 41 then becomes N; Then rotor structure 1 just can continue to move right, make rotor structure 1 to rotate around rotating shaft 11 constantly.
Fig. 6 (a) and Fig. 6 (b) are the illustrative view of the magnetic pole plate of the magnetite of the axial charging of Brushless DC motor of the present invention and different directions off-centre, shown in Fig. 6 (a), first protuberance 21 and second protuberance 41 are to be eccentric in same direction, and first protuberance 21 and second protuberance 41 of Fig. 6 (b) then are eccentric in other direction.
What deserves to be mentioned is that the manufacturing materials of the rotor enclosing cover of Fig. 5 (a) must be a magnetic permeable material, the manufacturing materials of the rotor enclosing cover of Fig. 5 (b) then is (for example: copper) can not have magnetic conductance; Have the knack of this operator and all can push away easily, adopt the magnetite of axial charging can reduce the use amount of permanent magnetic material.
Fig. 7 (a) and Fig. 7 (b) are the motor profiles that cooperates Fig. 5 and Fig. 6 respectively, in Fig. 7 (a), go up magnetic stripe 13 and following magnetic stripe 12 (certainly, in Fig. 7 (b), be meant single magnetic stripe 15) be and last magnetic sheet 2, sleeve pipe 5 and magnetic sheet 4 down to cooperate the magnetic field that coil 6 produced and form a magnetic flux path jointly.
What be worth to pay attention to is, first protuberance 21 and second protuberance 41 are all can be more in addition crooked to extend to form a plurality of extension protuberances 210 and 410, as Fig. 8 and shown in Figure 9, and this magnetic moment performance that shifts gears and also can improve stator structure.
Technology proposed by the invention is an example with the brushless single phase d.c. motor only, and the present invention can also be generalized to heterogeneous structure certainly.In sum, the more aforesaid known technology of the present invention has more closely structure and has more mini volume, especially is specially adapted to thin motor (LOW PROFILEMOTER) or mini motor (MINIATURE MOTER).
The above is preferred embodiment of the present invention all only, is not to be used for limiting scope of the invention process.Be allly to think by the personage Ren Shi craftsman who is familiar with background technology of the present invention and be to modify as all according to claims of the present invention, the scope that neither disengaging claims institute desire is protected.
Claims (2)
1, a kind of motor comprises:
One rotor structure, comprise a rotating shaft and a magnetite, this magnetite is to surround this rotating shaft, and this magnetite can be divided into two by the plane perpendicular to this rotating shaft partly, every part all comprises 2N magnetic region in correspondence with each other, and each this magnetic region has the magnetic opposite with the magnetic region of adjacency, and with this plane vertical direction in correspondence with each other magnetic region have opposite magnetic;
One stator structure, comprise a sleeve pipe, one first ring and one second ring, this first ring and this second ring are an opening and another openings that lays respectively at this sleeve pipe, and this first ring and this second ring also have N first protuberance and N second protuberance respectively, individual first protuberance each interval of this N and copline ground extend out from this first ring, individual second protuberance each interval of this N and copline ground extend out from this second ring, and the position of each this first protuberance is the position corresponding to each this second protuberance; And
One coil is wound on this sleeve pipe;
Wherein, when giving this stator structure energy to this coil electricity, each this first protuberance promptly has this second protuberance opposite magnetic corresponding with each because of induction, makes this rotor structure around this rotating shaft and rotating, and N is one greater than 1 integer.
2, a kind of motor comprises:
One rotor structure, comprise a rotating shaft and a magnetite, this magnetite is to surround this rotating shaft, and this magnetite comprises 2N axial magnetic region in correspondence with each other, one end of each this axial magnetic region has the magnetic opposite with the other end, and an end of each this axial magnetic region has the opposite magnetic of corresponding end with the magnetic region of adjacency;
One stator structure, comprise a sleeve pipe, one first ring and one second ring, this first ring and this second ring are an opening and another openings that lays respectively at this sleeve pipe, and this first ring and this second ring also have N first protuberance and N second protuberance respectively, individual first protuberance each interval of this N and copline ground extend out from this first ring, individual second protuberance each interval of this N and copline ground extend out from this second ring, and the position of each this first protuberance is the position corresponding to each this second protuberance; And
One coil is wound on this sleeve pipe;
Wherein, when giving this stator structure energy to this coil electricity, each this first protuberance promptly has this second protuberance opposite magnetic corresponding with each because of induction, makes this rotor structure around this rotating shaft and rotating, and N is one greater than 1 integer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100368876A CN1314184C (en) | 2004-04-19 | 2004-04-19 | Motor and structure of its stator and rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100368876A CN1314184C (en) | 2004-04-19 | 2004-04-19 | Motor and structure of its stator and rotor |
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| Publication Number | Publication Date |
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| CN1691467A CN1691467A (en) | 2005-11-02 |
| CN1314184C true CN1314184C (en) | 2007-05-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2004100368876A Expired - Fee Related CN1314184C (en) | 2004-04-19 | 2004-04-19 | Motor and structure of its stator and rotor |
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| Country | Link |
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| CN (1) | CN1314184C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0800225D0 (en) * | 2008-01-07 | 2008-02-13 | Evo Electric Ltd | A rotor for an electrical machine |
| CN102280951A (en) * | 2010-06-09 | 2011-12-14 | 士燿国际股份有限公司 | Driving device |
| EP3529812A1 (en) | 2016-10-24 | 2019-08-28 | The Trustees For The Time-Being Of The KMN Fulfilm | An electromagnet component comprising magnetite for use in a generator |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4803389A (en) * | 1986-07-22 | 1989-02-07 | Nippon Telegraph And Telephone Corporation | Stepping motor, method of driving the same and drive circuit therefor |
| US4983915A (en) * | 1987-04-18 | 1991-01-08 | Lothar Rossi | Device for determining the rotary angle position of rotary drives of electrical machines by evaluation of electrical voltages by sensors responding to rotary movements |
| US4987331A (en) * | 1989-03-06 | 1991-01-22 | Alex Horng | Non-brush D.C. motor with an improved stator |
| CN2346109Y (en) * | 1998-06-16 | 1999-10-27 | 台达电子工业股份有限公司 | Fan motor with fixed function |
| CN1089960C (en) * | 1997-06-16 | 2002-08-28 | 台达电子工业股份有限公司 | Motor stator structure and its forming method |
-
2004
- 2004-04-19 CN CNB2004100368876A patent/CN1314184C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4803389A (en) * | 1986-07-22 | 1989-02-07 | Nippon Telegraph And Telephone Corporation | Stepping motor, method of driving the same and drive circuit therefor |
| US4983915A (en) * | 1987-04-18 | 1991-01-08 | Lothar Rossi | Device for determining the rotary angle position of rotary drives of electrical machines by evaluation of electrical voltages by sensors responding to rotary movements |
| US4987331A (en) * | 1989-03-06 | 1991-01-22 | Alex Horng | Non-brush D.C. motor with an improved stator |
| CN1089960C (en) * | 1997-06-16 | 2002-08-28 | 台达电子工业股份有限公司 | Motor stator structure and its forming method |
| CN2346109Y (en) * | 1998-06-16 | 1999-10-27 | 台达电子工业股份有限公司 | Fan motor with fixed function |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1691467A (en) | 2005-11-02 |
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Assignee: Delta Energy Technology (Shanghai) Co., Ltd. Assignor: Delta Optoelectronics Inc. Contract record no.: 2010990000774 Denomination of invention: Inner curve radial plunger type hydraulic pump/motor Granted publication date: 20070502 License type: Exclusive License Open date: 20051102 Record date: 20100920 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070502 Termination date: 20170419 |