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Motor and device mounted therewith

A technology of electric motors and permanent magnets, which is applied to electric components, synchronous motors with stationary armatures and rotating magnets, electrical components, etc. It can solve the problems of increased cost, increased number of pieces, and increased magnet processing costs to achieve low cost, cost efficient effect

Inactive Publication Date: 2009-01-28
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] According to this conventional motor, the output torque can be increased by mounting two rotors. However, since the magnets are attached to the surface, the number of parts such as adhesives increases. Also, since the magnets are arc-shaped, the magnets The processing cost increases, these are the reasons for the cost increase
In addition, when the motor rotates at high speed, there are reliability problems such as the magnet falling off due to the centrifugal force.

Method used

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  • Motor and device mounted therewith
  • Motor and device mounted therewith
  • Motor and device mounted therewith

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0038] figure 1 It is a cross-sectional view of the motor according to Embodiment 1 of the present invention. The motor of this embodiment is constituted by a stator 10 , an inner rotor 20 facing the radially inner side of the stator, and an outer rotor 30 facing the radially outer side of the stator.

[0039] The stator core 11 constituting the stator 10 includes: a roughly annular stator yoke 14, outer teeth 12 protruding from the stator yoke 14 toward the outer peripheral direction, and outer teeth 12 having the same number as the outer teeth 12 extending from the stator yoke 14 toward the inner peripheral direction. Protruding inner teeth 13 . Outer grooves 16 are formed between the respective outer teeth 12 , and inner grooves 17 are formed between the respective inner teeth 13 . Also, a plurality of windings 15 in the form of three-phase star-connected or delta-connected annular windings are wound in a concentrated winding manner on the stator yoke 14 between the oute...

Embodiment approach 2

[0047] Fig. 2 is a cross-sectional view of a stator of a motor according to Embodiment 2 of the present invention. Like the motor of Embodiment 1, the motor of the present embodiment includes a stator 10 , an inner rotor 20 facing the radially inner side of the stator 10 , and an outer rotor 30 facing the radially outer side of the stator 10 . Only the shape of the permanent magnet is different from Embodiment 1, and therefore, the same reference numerals are assigned to the same constituent elements, and description thereof will be omitted.

[0048] In this embodiment, the outer permanent magnet 32A and the inner permanent magnet 22A have the same shape, and both the circumferential length and the radial length are equal. Therefore, the molds for forming the permanent magnets can be designed to be the same mold, and the cost can be reduced. In addition, the outer permanent magnet insertion hole 34 and the inner permanent magnet insertion hole 24 are the same as in the first ...

Embodiment approach 3

[0051] Fig. 3 is a schematic explanatory diagram of a device according to Embodiment 3 of the present invention. In FIG. 3 , the device 61 has: a frame body 62, a motor 67 mounted on the frame body 62, a driver 65 for driving the motor 67, a power supply 68 for supplying power to the driver 65, and a motor 67 as a power source. The load 69 of the mechanism part driven by the source.

[0052] Here, the motor drive unit 63 is constituted by the motor 67 and the driver 65 . The device 61 is driven by a power supply 68 via a driver 65 to a motor 67 . The rotational torque is transmitted to the load 69 via the output shaft of the electric motor 67 . As the electric motor 67, the electric motors of Embodiment 1 to Embodiment 2 mentioned above can be used.

[0053] As the device 61 , it is very effective for home electric appliances or electrical components that are compact, space-restricted, and require a high-output motor.

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Abstract

The present invention relates to a motor and device mounted therewith. The motor includes: a stator formed by a stator core having an annular stator yoke, a plurality of external teeth protruding toward outside from the stator yoke, and the same number of internal teeth as the external teeth protruding toward inside from the stator yoke, and a plurality of windings wound on the stator core; an external rotor opposing to the external teeth via a space; and an internal rotor opposing to the internal teeth via a space. Each of the external rotor and the internal rotor has a hole for inserting a permanent magnet having a rectangular cross section.

Description

technical field [0001] The present invention relates to an electric motor and a device equipped with the electric motor, and particularly relates to a structure of a rotor of the electric motor. Background technique [0002] Figure 4 It is a conventional ring-type brushless motor having double rotors, and is composed of a stator 110 , an inner rotor 120 and an outer rotor 130 . [0003] The stator 110 is composed of a stator core 111 and a winding 115 . Stator core 111 is composed of stator yoke 114 , outer teeth 112 and inner teeth 113 provided on stator yoke 114 , outer slots 116 are formed between outer teeth 112 , and inner slots 117 are formed between inner teeth 113 . [0004] A plurality of annular three-phase windings 115 are applied to the stator back 114 . The coil 115 is wound around the stator yoke 114 in a concentrated winding manner, and is accommodated in the outer slot 16 and the inner slot 117 to form a star connection or a delta connection. [0005] The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K16/02H02K21/14H02K21/22
CPCH02K21/14H02K21/22H02K16/02H02K1/2786H02K21/125H02K1/2706H02K1/146
Inventor 中川幸典吉川佑一李虎森崎昌彦村上浩
Owner PANASONIC CORP