WO2003052901A1 - Moteur a aimants permanents et appareil de levage - Google Patents

Moteur a aimants permanents et appareil de levage Download PDF

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Publication number
WO2003052901A1
WO2003052901A1 PCT/JP2001/011148 JP0111148W WO03052901A1 WO 2003052901 A1 WO2003052901 A1 WO 2003052901A1 JP 0111148 W JP0111148 W JP 0111148W WO 03052901 A1 WO03052901 A1 WO 03052901A1
Authority
WO
WIPO (PCT)
Prior art keywords
permanent magnet
rotor
peripheral surface
rotor core
stator
Prior art date
Application number
PCT/JP2001/011148
Other languages
English (en)
Japanese (ja)
Inventor
Takanobu Kushihira
Masato Nagata
Sinya Goto
Original Assignee
Kabushiki Kaisha Toshiba
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to CN01143873.8A priority Critical patent/CN1199336C/zh
Application filed by Kabushiki Kaisha Toshiba filed Critical Kabushiki Kaisha Toshiba
Priority to JP2003553688A priority patent/JPWO2003052901A1/ja
Priority to AU2002216371A priority patent/AU2002216371A1/en
Priority to PCT/JP2001/011148 priority patent/WO2003052901A1/fr
Publication of WO2003052901A1 publication Critical patent/WO2003052901A1/fr

Links

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
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2786—Outer rotors
    • H02K1/2787—Outer rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/2789—Outer rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2791—Surface mounted magnets; Inset magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/22—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
    • H02K29/03—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with a magnetic circuit specially adapted for avoiding torque ripples or self-starting problems

Definitions

  • the present invention relates to a permanent magnet type motor, and more particularly to a permanent magnet type motor suitable for being incorporated into a hoist of an elevator apparatus and an elevator apparatus using the permanent magnet type motor.
  • Fig. 1 shows an example of a conventional permanent magnet type motor.
  • This mode is, for example, a brushless motor with three phases and 20 poles, and the outer periphery of the stator 1 (only the stator core 2 is shown in FIG. 1 and the stator winding is omitted).
  • the rotor 3 rotatably disposed in the portion is configured such that a plate-shaped permanent magnet 6 is inserted into a through hole 5 provided in a portion of the rotor iron core 4 where each magnetic pole is formed.
  • Each permanent magnet 6 is magnetized in the radial direction so that the S pole and the N pole are alternately located in the circumferential direction.
  • the gap size between the rotor core 4 and the stator core 2 is configured to be constant over the entire circumference. For this reason, the change in the magnetic resistance due to the rotation angle becomes small, and the magnetic flux density distribution in the gap between the iron cores depends on the arrangement of the permanent magnets 4.
  • the magnetic flux density distribution has a trapezoidal wave shape, and the magnetic flux density greatly changes depending on the rotation angle (mechanical angle). That is, since the cogging torque is increased, the torque ripple is increased, and the motor efficiency is reduced, and the vibration and the noise are increased.
  • a first object of the present invention is to provide a permanent magnet type motor capable of reducing vibration and noise by reducing cogging torque and torque ripple
  • a second object is to provide vibration and noise.
  • the aim is to provide a comfortable and comfortable elevator device.
  • a permanent magnet type motor includes: a stator having a stator core on which a stator winding is wound; and a permanent magnet for magnetic pole formation, which is disposed on an outer peripheral portion of the stator.
  • a permanent magnet type motor having a rotor having a rotor core in which a magnet is incorporated.
  • the magnetic pole is characterized in that it is formed in a flat or convex shape so that the center of the magnetic pole is smaller than both ends in the circumferential direction.
  • the magnetic flux density distribution in the air gap between the stator core and the rotor core approximates a sinusoidal shape, so that the cogging torque can be reduced and the torque ripple can be reduced.
  • the central portion in the circumferential direction is formed in a planar shape, and both ends in the circumferential direction are formed in an arc shape.
  • each magnetic pole of the rotor core is formed in a flat shape, and both ends in the circumferential direction are formed in a flat shape inclined from the center part to the end part toward the outer circumferential part. It is also a good configuration. Further, the inner peripheral surface of each magnetic pole of the rotor core may be formed in an arc shape.
  • stator having a ring-shaped stator core having a plurality of teeth protruding toward the center, a stator having a stator winding wound around each tooth, and a rotor having a permanent magnet therein.
  • an outer peripheral surface of the rotor core facing the teeth is eternal.
  • the teeth are formed so that the distance between the outer peripheral surface corresponding to the circumferential center of the magnet and the teeth is shorter than the distance between the outer peripheral surface corresponding to the circumferential ends of the permanent magnet and the teeth. This is a characteristic feature.
  • the permanent magnet is inserted into a through hole provided in the rotor, and the through hole penetrates through the through hole more than a distance between a circumferential central portion of the through hole and an outer peripheral surface of the rotor core.
  • the motor is characterized in that a distance between a circumferential end of the hole and an outer peripheral surface of the rotor core is reduced. Further, the motor is characterized in that an air gap is formed between a circumferential end of the permanent magnet and the spiral core.
  • a ring-shaped stator core having a plurality of teeth projecting radially from the center, and a stator having a stator winding wound around each tooth;
  • a rotor having a permanent magnet therein, wherein the rotor is rotated by passing a current through the stator winding to generate a magnetic field, and the rotor faces the teeth.
  • the inner peripheral surface of the rotor core has a distance between the inner peripheral surface corresponding to the circumferential center of the permanent magnet and the teeth, and the inner peripheral surface corresponding to the peripheral end of the permanent magnet and the teeth. It is characterized by being formed to be shorter than the distance between
  • the elevator apparatus of the present invention further includes a cage provided so as to be able to move up and down in the hoistway, a weight mounting portion that is provided so as to be able to move up and down in the hoistway, and having a count weight. It is characterized by having a winding machine having a permanent magnet type motor.
  • the cogging torque of the permanent magnet type motor which is the driving source of the hoist, can be reduced, so that the generation of vibration and noise can be suppressed, and the riding comfort is improved.
  • the hoist be provided at the weight mounting portion. According to such a configuration, since the hoisting machine itself functions as a weight, the amount of the counterweight mounted on the weight mounting portion can be reduced. Also, since there is no need to provide a machine room for installing the hoisting machine above the hoistway, the height of the building can be reduced accordingly.
  • the “rotor having at least two plate-shaped permanent magnets therein” means that at least one side surface of the permanent magnet is not exposed.
  • FIG. 1 is a partial sectional view of a conventional permanent magnet type motor.
  • FIG. 2 is a diagram showing a magnetic flux density distribution in a gap between iron cores of the permanent magnet type motor shown in FIG.
  • FIG. 3 shows the first embodiment of the present invention, and is a partial plan view of a permanent magnet type motor.
  • Fig. 4 is a vertical sectional side view of the hoist of the elevator.
  • FIG. 5 is a perspective view showing the overall configuration of the elevator apparatus.
  • FIG. 6 shows the magnetic flux density distribution in the air gap between the cores of the permanent magnet type motor shown in Fig. 3.
  • FIG. 6 shows the magnetic flux density distribution in the air gap between the cores of the permanent magnet type motor shown in Fig. 3.
  • FIG. 7 is a diagram for explaining the relationship between the shape of the inner peripheral surface of each magnetic pole of the rotor core and the magnetic flux density distribution, and shows a permanent magnet type motor when the entire inner peripheral surface is configured to be planar. Evening partial plan view.
  • FIG. 8 is a view showing a magnetic flux density distribution in a gap between iron cores of the permanent magnet type motor shown in FIG. 7.
  • FIG. 9 is a diagram for explaining the relationship between the shape of the inner peripheral surface of each magnetic pole of the rotor core and the magnetic flux density distribution, and shows a permanent magnet type motor in which the entire inner peripheral surface is formed in an arcuate shape. Evening partial plan view.
  • FIG. 10 is a diagram showing a magnetic flux density distribution in a gap between iron cores of the permanent magnet type motor shown in FIG. 9;
  • FIG. 11 shows a second embodiment of the present invention and is a partial plan view of a permanent magnet type motor.
  • FIG. 12 is a diagram showing a magnetic flux density distribution in a gap between iron cores of the permanent magnet type motor shown in FIG. 11;
  • FIG. 13 is a partial plan view of a permanent magnet motor according to a third embodiment of the present invention.
  • FIG. 14 is a partial plan view of a permanent magnet motor according to a modification of the third embodiment of the present invention.
  • FIG. 15 is a schematic configuration diagram showing an example in which the present invention is applied to a motor with a single bite of a thinner type.
  • FIG. 5 shows the schematic configuration of the elevator device.
  • a car 12 and a weight mounting portion 13 are configured to move up and down along first and second guide rails 14 and 15, respectively. I have.
  • Two moving pulleys 16 are fixed to the lower part of the car 12.
  • a hoisting machine 17 is disposed above the weight mounting portion 13, and a count weight 18 is mounted below.
  • the hoisting machine 17 It is housed in a case 13a provided above the weight mounting part 13.
  • an intermediate pulley 19 is installed near the top of the hoistway 11, and a rope 20 is hooked on the intermediate pulley 19.
  • One end of the rope 20 is fixed near the top of the first guide rail 14, and the other end is fixed near the top of the second guide rail 15.
  • the cage 12 is supported between the one end of the rope 20 and the intermediate pulley 19 via the moving pulley 16.
  • the weight mounting portion 13 is provided via the sheave 21 of the hoisting machine 17 (see FIG. 4). It is supported so that it can move up and down.
  • the hoisting machine 17 has a rectangular plate-shaped support plate 22 and a brushless motor 23 that directly rotates and drives the sheave 21. Is configured.
  • the support plate 22 has a circular opening 22a at the center thereof, and a substantially cylindrical sleeve extending rightward in FIG. 4 is provided at the periphery of the opening 22a. 24 are fixed.
  • a stator 25 of the motor 23 is fixed to an outer peripheral portion of the sleeve 24.
  • the stator 25 includes a stator core 26 made of laminated silicon steel plates, and a coil 27 wound around the stator core 26.
  • the stator core 26 has, for example, 63 teeth 26a and slots 26b (all shown only in FIG. 3).
  • the slot 26b 30 coils 27 (therefore, each of the U-phase, V-phase, and W-phase coils has no more than 10 coils) so as to form a distributed winding forming one coil at a 3-slot pitch. ) Is stored.
  • the U-phase, V-phase, and W-phase are arranged so that each coil 27 is shifted by one slot.
  • a rotor 29 is rotatably supported on an inner peripheral portion of the sleeve 24 via a ball bearing 28.
  • the rotor 29 includes a cylindrical shaft portion 30 fitted to the inner ring 28 a of the ball bearing 28, and a disk-shaped base integrally formed on the right end of the shaft portion 30.
  • Part 31 a cylindrical yoke part 32 integrally formed with the peripheral part of the base part 31, and fixed to the inner peripheral part of the yoke part 32 And a rotor iron core 33 made of laminated steel sheets.
  • a bearing holder 34 for supporting the inner ring 28 a of the ball bearing 28 is attached to the left end of the shaft 30.
  • a mounting shaft 21 a of the sheave 21 is inserted into the shaft 30 of the rotor 29.
  • a key 35 is inserted between the shaft portion 30 and the mounting shaft portion 21a, and the rotor 29 and the sheave 21 are integrally rotated by the key 35. It is configured as follows.
  • a plurality of grooves 21b are formed in the outer periphery of a portion of the sheave 21 protruding leftward in FIG. 4 from the shaft portion 30, and the groove 21b is formed in the groove 21b.
  • Rope 20 is hooked.
  • each of the through holes 36 has a rectangular plate shape.
  • a permanent magnet 37 for forming a magnetic pole is accommodated and fixed.
  • Each of the permanent magnets 37 is magnetized in the radial direction, and is arranged such that the S pole and the N pole are alternately located in the circumferential direction.
  • the permanent magnet 37 is not located at both ends in the circumferential direction of the through hole 36, and is formed inside the rotor core 33 as a space 36a having a triangular cross section.
  • the rotor core is arranged such that the gap between the rotor core 33 and the stator core 26 is smaller at the center of the magnetic pole than at both ends in the circumferential direction.
  • the inner peripheral surface of each of the magnetic poles 33 is formed in a convex shape.
  • the central portion is formed into a flat shape (hereinafter, this portion is referred to as a flat portion 33a), and both ends in the circumferential direction are formed. It is configured as an arc surface (hereinafter, this portion is referred to as an arc surface portion 33b).
  • FIG. 7 shows an example of a model. In this model, the entire inner peripheral surface of each magnetic pole of the rotor core 33 is formed in a planar shape.
  • Fig. 8 shows the magnetic flux density distribution in the air gap between the iron cores in this model. As is clear from Fig. 8, the magnetic flux density distribution approximates a sinusoidal shape.
  • FIG. 9 shows another example of the model.
  • the entire inner peripheral surface of each magnetic pole of the rotor iron core 33 is formed in an arc shape.
  • FIG. 10 shows the magnetic flux density distribution in the air gap between the iron cores in this model.
  • the radius of the arc surface is set to (2 ⁇ / 360X2 ⁇ 27rr xn / 360).
  • the magnetic flux density distribution approximates a sine wave shape.
  • the height of the top of the magnetic flux density distribution (that is, the magnitude of the magnetic flux density when the mechanical angle is 9) is lower in FIG. That is, in the model of FIG. 7, the change in the magnetic flux density near the center of each magnetic pole of the rotor core 33 (that is, the mechanical angle is around 9 °) is smaller.
  • looking at the magnetic flux density distribution near both ends in the circumferential direction there is a part where the model in Fig. 7 changes significantly compared to the model in Fig. 9. Therefore, the inventor of the present invention has A model was constructed in which the area around the center was a flat surface and both ends in the circumferential direction were arc-shaped.
  • ⁇ 1 ⁇ (366 / n) X (m / 2) ⁇ °
  • 01 is shown as an angle from the circumferential center P of the magnetic pole to one boundary R. Therefore, the angle range of the actual plane part 33 a is twice as large as 0 1.
  • each magnetic pole of the rotor core 33 is configured so that the magnetic flux density distribution in the air gap between the cores approximates a sine wave shape, so that cogging torque is reduced and torque ripple is reduced. Reduction can be achieved. Therefore, in the present embodiment, by configuring the hoisting machine 17 of the elevator apparatus by the motor 23, vibration and noise generated when the hoisting machine 17 is driven can be suppressed. Because it is possible, riding comfort is improved.
  • the hoisting machine 17 is provided in the weight mounting portion 13, it is not necessary to provide a dedicated machine room near the top of the hoistway 11. In addition, there is also an effect that the amount of the counterweight 18 provided in the eight mounting portion 13 can be reduced.
  • FIGS. 11 and 12 show a second embodiment of the present invention, and the differences from the first embodiment will be described.
  • the same parts as in the first embodiment are the same.
  • One symbol is attached. That is, in the second embodiment, of the inner peripheral surface of each magnetic pole of the rotor core 33, both ends in the circumferential direction are formed into inclined surfaces (hereinafter, this portion is referred to as an inclined surface portion 33 c). Make up.
  • the inclined surface portion 33c is formed in a planar shape connecting the boundary R and the end Q shown in the first embodiment.
  • FIG. 12 shows the magnetic flux density distribution in the air gap between the iron cores at this time. As is clear from the comparison between FIG. 12 and FIG. 6, also in this case, a magnetic flux density distribution very similar to a sine wave shape can be obtained.
  • the hoisting machine may be arranged in a machine room provided near the top of the hoistway.
  • a car is connected to one end of each of the plurality of ropes hung on the sheave of the hoist, and a wire mounting unit is connected to the other end. Then, when the hoist is driven to rotate the sheave, the car and the weight mounting portion are moved up and down.
  • the ratio m occupied by the plane portion in the inner peripheral surface of each magnetic pole of the rotor core is not limited to 0.56, but may be any value as long as 0 ⁇ m ⁇ 1 is satisfied. Therefore, the entire inner peripheral surface of each magnetic pole may be flat, or the entire inner peripheral surface of each magnetic pole may be arcuate.
  • the magnetic flux density distribution in the air gap between the iron cores can be made sufficiently close to a sine wave shape, and cogging torque and torque ripple can be reduced.
  • FIG. 13 shows a partial plan view of the permanent magnet type motor 40 according to the present embodiment.
  • portions having the same functions as those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
  • the inner peripheral surface of the rotor core 33 and the stator core 26 (teeth 26a and a slot 26b).
  • the inner peripheral surface 42 of the rotor core 33 and the through hole into which the permanent magnet 37 is inserted are further provided. It is characterized by the distance from the hole 36.
  • the distance between the circumferential end of the through hole 36 and the inner circumferential surface 42 of the rotor core 33 is greater than the distance between the circumferential end of the through hole 36 and the rotor.
  • the distance between the core 33 and the inner peripheral surface 42 is shortened.
  • the permanent magnet 37 is magnetized in the radial direction, but by adopting such a structure, the rotor between the permanent magnet 37 and the permanent magnet 37 exits from the N pole of the permanent magnet 37.
  • the amount of magnetic flux passing through the core 33 and returning to the S pole of the permanent magnet can be reduced, and the effective magnetic flux can be increased.
  • X be small, but in order to manufacture the rotor integrally, X cannot be set to zero, that is, the end of the permanent magnet cannot be exposed.
  • the limit of X is about the thickness of one steel sheet. Therefore, assuming that the thickness of the laminated steel sheet—b is b, the relationship between b, x, and a is b ⁇ x ⁇ a.
  • FIG. 14 shows a partial plan view of a permanent magnet motor according to this modification.
  • the shape of the through-hole 36 formed in the rotor core 33 is characterized. That is, the through-hole 36 is made larger than the permanent magnet so that a gap 36a is formed at both ends in the circumferential direction when the permanent magnet 37 is inserted into the through-hole 36, and the gap is formed in the inner circumference of the rotor core 33.
  • a through hole 36 is formed so as to approach the surface 40.
  • the magnetic flux of the magnetic flux that exits from the N pole of the permanent magnet 37 passes through the inside of the rotor core 33 between the permanent magnets 37, and returns to the S pole of the permanent magnet 37
  • the road can be made long and narrow. Accordingly, the magnetic resistance of this magnetic path increases, and the amount of magnetic flux passing through this magnetic path is further reduced, and as a result, the amount of effective magnetic flux can be increased.
  • the shape of the gap 36a is trapezoidal in plan view.
  • the present invention is not necessarily limited to this embodiment.
  • the rotor may have a triangular shape in which the rotor core side is the base, or may have other shapes.
  • the case where the rotor 33 is disposed outside the stator core 26 has been described as an example of a rotor-in-one-out type motor, but the rotor is provided inside the stator.
  • the present invention may be applied to an inner bite-and-evening type mooring provided. An embodiment in this case is shown in FIG.
  • the outer peripheral surface 44 of the rotor core facing the teeth 26a corresponds to the outer peripheral surface 44 corresponding to the central part in the circumferential direction of the permanent magnet 37.
  • the distance between the teeth 26a and the teeth 26a may be shorter than the distance between the outer peripheral surface 44 corresponding to the circumferential end of the permanent magnet 37 and the teeth 26a.
  • the distance between the circumferential center of the through hole 36 into which the permanent magnet 37 is inserted and the outer peripheral surface 44 of the rotor core 26 is larger than the distance between the circumferential end of the through hole 36 and the circumferential end. If the distance between the rotor and the outer peripheral surface 44 of the rotor core 26 is reduced, the amount of effective magnetic flux can be increased.
  • the present embodiment can be variously modified without changing the gist.
  • the inner peripheral surface of each magnetic pole of the rotor core is such that the center of the magnetic pole is smaller than the both ends in the circumferential direction with respect to the gap size with the stator core. Because of the planar or convex configuration as described above, the cogging torque can be reduced and the torque ripple can be reduced, so that the motor efficiency can be improved and vibration and noise can be reduced.
  • the hoist is configured to reduce vibration and noise and improve ride comfort. Can be.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Cage And Drive Apparatuses For Elevators (AREA)

Abstract

L'invention concerne un moteur (23) de palan. Ce moteur est équipé d'une carcasse de rotor (33) comprenant des aimants permanents (37) qui permettent de former des pôles magnétiques. La surface périphérique intérieure de chaque pôle magnétique de la carcasse de rotor (33) est convexe de façon qu'un espace situé entre la carcasse de rotor et une carcasse de stator (26) soit plus étroit à proximité du centre du pôle magnétique et plus large aux extrémités opposées périphériques. D'une manière plus spécifique, la partie centrale de la surface périphérique intérieure de chaque pôle magnétique est une partie plane (33a) et les extrémités opposées périphériques sont des parties à surface arquée (33b). En conséquence, la répartition du flux magnétique entre la carcasse de rotor (33) et la carcasse de stator (26) se rapproche étroitement d'une forme d'onde sinusoïdale, ce qui permet de réduire le couple de crantage.
PCT/JP2001/011148 2001-12-14 2001-12-19 Moteur a aimants permanents et appareil de levage WO2003052901A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN01143873.8A CN1199336C (zh) 2001-12-14 2001-12-14 永磁式电动机和电梯装置
JP2003553688A JPWO2003052901A1 (ja) 2001-12-19 2001-12-19 永久磁石形モータ及びエレベータ装置
AU2002216371A AU2002216371A1 (en) 2001-12-19 2001-12-19 Permanent magnet type motor and elevator device
PCT/JP2001/011148 WO2003052901A1 (fr) 2001-12-14 2001-12-19 Moteur a aimants permanents et appareil de levage

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN01143873.8A CN1199336C (zh) 2001-12-14 2001-12-14 永磁式电动机和电梯装置
PCT/JP2001/011148 WO2003052901A1 (fr) 2001-12-14 2001-12-19 Moteur a aimants permanents et appareil de levage

Publications (1)

Publication Number Publication Date
WO2003052901A1 true WO2003052901A1 (fr) 2003-06-26

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Application Number Title Priority Date Filing Date
PCT/JP2001/011148 WO2003052901A1 (fr) 2001-12-14 2001-12-19 Moteur a aimants permanents et appareil de levage

Country Status (2)

Country Link
CN (1) CN1199336C (fr)
WO (1) WO2003052901A1 (fr)

Cited By (10)

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EP1793482A1 (fr) 2005-12-02 2007-06-06 Moteurs Leroy-Somer Machine électrique tournante à ondulations de couple réduites
JP2009136075A (ja) * 2007-11-29 2009-06-18 Hiroshi Shimizu アウターロータモータ
US7985845B2 (en) 2004-12-10 2011-07-26 Straumann Holding Ag Protein formulation
CN102976191A (zh) * 2012-11-19 2013-03-20 昆山欧立电梯配件有限公司 钢带电梯
CN104773631A (zh) * 2015-04-17 2015-07-15 昆山欧立别墅电梯有限公司 钢带电梯
US10214387B2 (en) 2016-05-13 2019-02-26 Otis Elevator Company Magnetic elevator drive member and method of manufacture
US10333362B2 (en) 2014-10-15 2019-06-25 Accelerated Systmes Inc. Internal permanent magnet motor with an outer rotor
JP2019135890A (ja) * 2018-02-05 2019-08-15 株式会社日立産機システム 外転型永久磁石回転電機
US10587180B2 (en) 2016-05-13 2020-03-10 Otis Elevator Company Magnetic elevator drive member and method of manufacture
JP2021069191A (ja) * 2019-10-23 2021-04-30 株式会社デンソー 回転電機

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JP4496064B2 (ja) * 2004-11-25 2010-07-07 株式会社東芝 永久磁石形モータ及び洗濯機
CN101420160B (zh) * 2007-10-22 2010-11-24 沈阳工业大学 正弦极宽调制的永磁同步电动机
JP5221219B2 (ja) * 2008-06-20 2013-06-26 株式会社日立産機システム 永久磁石式同期モータ

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JP2001211577A (ja) * 2000-12-20 2001-08-03 Hitachi Ltd 永久磁石回転電機
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JP2001286114A (ja) * 2000-01-25 2001-10-12 Toshiba Corp 電動機及びエレベータ装置

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JPH11355985A (ja) * 1998-06-04 1999-12-24 Toshiba Corp 永久磁石形モータ
JP2001211583A (ja) * 1999-11-19 2001-08-03 Honda Motor Co Ltd 永久磁石式回転電動機
JP2001178096A (ja) * 1999-12-10 2001-06-29 Matsushita Electric Ind Co Ltd モータ
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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7985845B2 (en) 2004-12-10 2011-07-26 Straumann Holding Ag Protein formulation
US8029769B2 (en) 2004-12-10 2011-10-04 Straumann Holding Ag Protein formulation
EP1793482A1 (fr) 2005-12-02 2007-06-06 Moteurs Leroy-Somer Machine électrique tournante à ondulations de couple réduites
FR2894403A1 (fr) * 2005-12-02 2007-06-08 Leroy Somer Moteurs Machine electrique tournante a ondulations de couple reduites
US7692354B2 (en) 2005-12-02 2010-04-06 Moteurs Leroy-Somer Rotary electric machine with reduced torque ripple
JP2009136075A (ja) * 2007-11-29 2009-06-18 Hiroshi Shimizu アウターロータモータ
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CN104773631A (zh) * 2015-04-17 2015-07-15 昆山欧立别墅电梯有限公司 钢带电梯
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JP2019135890A (ja) * 2018-02-05 2019-08-15 株式会社日立産機システム 外転型永久磁石回転電機
JP7027187B2 (ja) 2018-02-05 2022-03-01 株式会社日立産機システム 外転型永久磁石回転電機
JP2021069191A (ja) * 2019-10-23 2021-04-30 株式会社デンソー 回転電機
JP7392388B2 (ja) 2019-10-23 2023-12-06 株式会社デンソー 回転電機

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