Rotor And Motor

A technology for rotors and rotor cores, which is applied to electric components, magnetic circuit rotating parts, electrical components, etc., can solve the problems of increasing the number of components and assembly hours, and achieve the effect of reducing the number of components

Active Publication Date: 2013-05-08
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the case of detecting the rotational position of the rotor as described above, if a sensor magnet is separately arranged on the rotor, the number of parts will increase
[0005] In addition, in order to fix the interpole magnets between the claw-shaped magnetic poles, assembly with very high height and precision is required, and the number of assembly man-hours increases.
If the number of parts increases, it is difficult to fix the interpole magnets between the claw poles with an efficient manufacturing method

Method used

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Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0070] The following follows figure 1 The first embodiment of the present invention will be described with reference to the drawings.

[0071] Such as figure 1 As shown, the motor housing 2 of the motor 1 has: a bottomed cylindrical shell 3; and a front cover 4, the front side of the shell 3, that is, figure 1 The opening on the middle left is closed. The circuit storage box 14 that accommodates power circuits such as circuit boards is installed on the rear side of the casing 3, that is, figure 1 on the middle right end.

[0072] The stator 5 is fixed to the inner peripheral surface of the housing 3 . The stator 5 has: a stator core 6 having a plurality of teeth extending radially inward; and segment conductor (SC) windings 15 wound on the teeth of the stator core 6 . The rotor 7 of the motor 1 has a rotating shaft 8 , and the rotor 7 is arranged inside the stator 5 . The rotary shaft 8 is a non-magnetic metal shaft, and is rotatably supported by a bearing 9 a supported ...

no. 2 Embodiment approach

[0097] The following follows Figure 7 ~ Figure 13 A second embodiment of the present invention will be described.

[0098] Such as Figure 7 As shown, the motor case 2 of the brushless motor 1 has a bottomed cylindrical case 3 and a front cover 4 that closes the front opening of the case 3 . The stator 5 is fixed to the inner peripheral surface of the casing 3 . The stator core 6 of the stator 5 is formed by laminating a plurality of stator core pieces 6 a made of steel plates.

[0099] Such as Figure 7 As shown, the rotor 7 is disposed inside the stator 5 , and the rotor 7 is inserted and fixed by the rotating shaft 8 . In the present embodiment, the rotating shaft 8 is a non-magnetic metal shaft, and is rotatably supported by a bearing 9 a provided on the bottom of the casing 3 and a bearing 9 b provided on the front cover 4 . The rotor 7 fixed on the rotating shaft 8 is a claw pole structure.

[0100] Such as Figure 8 , Figure 9 and Figure 13 As shown, the rot...

no. 3 Embodiment approach

[0145] then follow Figure 14 ~ Figure 17 A third embodiment of the present invention will be described.

[0146] This embodiment is characterized by the anti-scattering structure of the first and second back surface auxiliary magnets 41 and 42 and the first and second interpole magnets 31 and 32 provided on the rotor 7, and other structures are the same as those of the above-mentioned second embodiment. . Therefore, for convenience of description, only characteristic parts will be described in detail, and common parts will be given the same reference numerals and descriptions will be omitted.

[0147] Such as Figure 14 ~ Figure 17 As shown, on the opposite facing surface 12c of the first core base 12, the first fixing plate 61 for preventing scattering is fixed, and the opposite facing surface 22c of the second core base 22 is fixed with a fixing plate 61 for preventing scattering. The second fixing plate 62 . In the present embodiment, the first and second fixing plates...

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Abstract

A rotor includes at least one of a group of one or more auxiliary magnets that are located between first and second claw poles in a circumferential direction and magnetized to be magnetic poles of the same polarity as the first and second claw poles and another group of one or more auxiliary magnets that are located on a rear side of the first and second claw poles and magnetized to have radially outer portions of the same polarity as the first and second magnetic poles. The auxiliary magnets are arranged to protrude beyond at least one of axial end surfaces of the first and second core bases.

Description

technical field [0001] The invention relates to a rotor and an electric motor. Background technique [0002] The rotor used in the electric motor disclosed in the Publication No. 5-43749 has a claw pole structure with permanent magnet excitation. The rotor has a pair of rotor cores. The pair of rotor cores have a plurality of claw poles in the circumferential direction. Field magnets are placed between the rotor core and each claw-shaped magnetic pole functions as alternately different magnetic poles. [0003] In this claw pole structure rotor, interpole magnets composed of permanent magnets are arranged between a plurality of claw poles. Since the interpole magnets may fly out due to the centrifugal force accompanying the rotation of the rotor, the interpole magnets are respectively fixed to the claw-shaped magnetic poles. [0004] In the case of detecting the rotational position of the rotor as described above, if a sensor magnet is separately arranged on the rotor, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/27H02K1/24H02K1/28H02K29/06
CPCH02K1/2713H02K1/2706H02K16/02H02K1/27H02K1/2766H02K1/30H02K1/243H02K21/044
Inventor 山田洋次森田智惠横山诚也
Owner DENSO CORP
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