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Motor

A motor and armature technology, applied in electromechanical devices, torque ripple control, electrical components, etc., to achieve the effect of improving output

Inactive Publication Date: 2019-10-18
MABUCHI MOTOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, there is room for improvement in the output of brushless motors

Method used

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Experimental program
Comparison scheme
Effect test

no. 1 approach

[0057] Hereinafter, an outer rotor type brushless motor embodying the present invention will be described taking a case where the motor is a brushless motor as an example.

[0058] In the following, for the convenience of explanation, according to figure 1 The attitude of the brushless motor to express the up and down.

[0059] Such as figure 1 and figure 2 As shown, the base portion 2 of the brushless motor 1 (hereinafter simply referred to as the motor 1 ) has a bottomed cylindrical shape with an upper opening. A plurality of lightweight holes 2 a for weight reduction are formed on the peripheral surface of the base portion 2 . Although not shown, a plurality of internally threaded holes are formed on the lower surface of the base portion 2 . The motor 1 is fixed to an attachment target not shown by using these internally threaded holes.

[0060] A bearing holder 3 is erected at the center of the base portion 2 , and a stator (armature) 4 is fixed to the outer peripher...

no. 2 approach

[0113] Next, while referring to Figure 9 While the second embodiment of the present invention will be described, the same parts as those in the above-mentioned embodiment will be assigned the same reference numerals and their description will be omitted, and only the different points will be described.

[0114] Figure 9 It is a cross-sectional view of a motor 21 which is an inner rotor type brushless motor.

[0115] Inside the casing 22 of the motor 21 , a rotor (field element) 23 is supported rotatably about an axis L by a rotating shaft 24 . On the outer peripheral surface of the rotor 23, eight magnets 25 each having one magnetic pole on the outer periphery are arranged along the circumferential direction.

[0116] A ring-shaped stator (armature) 26 centered on the axis L is fitted in the housing 22 . The stator 26 includes a fixed iron core 27 , six split iron cores 28 , and coils 33 for each phase. The aforementioned rotor 23 is rotatably supported on the inner periph...

no. 3 approach

[0127] Next, while referring to Figure 10 and Figure 11 A third embodiment of the present invention will be described.

[0128] Figure 10 is a schematic diagram of a cross section of a motor 41 which is an inner rotor type brushed motor, Figure 11 is a longitudinal (axial) sectional view of the motor 41 .

[0129] Such as Figure 10 As shown, the stator (field element) 46 of the motor 41 includes a housing 42 and a magnet 45 . On the inner peripheral surface of the housing 42 , four magnets 45 each having one magnetic pole on the inner periphery are arranged along the circumferential direction around the axis L, and are adhered and fixed. On the inner peripheral side of the stator 46 , a rotor (armature) 43 is supported by the case 42 by the rotating shaft 44 so as to be rotatable about the axis L. A rotor core 47 is fitted to the rotating shaft 44 of the rotor 43 .

[0130] On the rotor core 47 , three non-wound attachment teeth 49 and three wound attachment teeth ...

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Abstract

Provided is a motor having an increased output. The motor includes: an armature (4) including a plurality of non-wound teeth (15) and a plurality of wound teeth (17) having windings wound thereon, theteeth being circumferentially alternately arranged about an axis (L); and a field magnet (10) including a plurality of magnets (9) arranged side by side circumferentially so as to oppose one of an inner or an outer periphery of the armature, the field magnet being supported about the axis so as to be rotatable relative to the armature. The field magnet is provided with rotating force by sequentially switching a magnetic flux that flows through the non-wound teeth and the wound teeth due to energization of the windings of the armature. The wound teeth include a proximal-end portion having a circumferential width (B6) greater than a circumferential width (B5) of a proximal-end portion of the non-wound teeth.

Description

technical field [0001] The present invention relates to motors. Background technique [0002] In an inner rotor type brushless motor, for example, a stator (armature) is arranged in a housing, and a rotor (field element) including magnets is rotatably supported on the inner peripheral side of the stator. In the stator, a plurality of teeth are formed protruding toward the inner peripheral side, the teeth are arranged at equal intervals in the circumferential direction, and slots are opened between the teeth. Coils of three phases, U-phase, V-phase, and W-phase, are wound around each tooth via these slots to form coils for each phase. A motor is constituted by the above structure. [0003] The coils of each phase of the stator are sequentially energized at a timing corresponding to the rotation angle of the rotor. Accordingly, the magnetic flux flowing to each tooth is continuously switched to impart a rotational force to the rotor. [0004] In the brushless motor describ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/16
CPCH02K1/16H02K1/165H02K2213/03H02K1/278H02K1/2791H02K3/18H02K1/17H02K1/265H02K23/34H02K1/276H02K1/08H02K1/14H02P6/10
Inventor 村上英树宫坂正明
Owner MABUCHI MOTOR