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Rotary motor

A technology for rotating electrical machines and commutator segments, which is applied in the direction of electrical components, electromechanical devices, and electric components. It can solve the problems of coil disconnection, increased fusion, and poor performance of the motor, so as to achieve stable electrical connections and prevent coils Disconnected, good performance effect

Active Publication Date: 2013-10-30
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the conventional rotating electrical machine, since a plurality of protrusions are formed on the side of the hook portion that is in contact with the winding (coil), the protrusions are not easy to form. In addition, the wire diameter of the coil becomes larger and the commutation around the hook portion becomes difficult. When the volume of the segment increases, the heat capacity of the coil and the hook increases, and the heating near the hook is insufficient during fusion, and the fusion becomes insufficient, so that the electrical connection between the coil and the commutator segment becomes unstable, thereby Deterioration of motor performance may occur
[0007] In order to avoid this situation, if the amount of energization and pressure during fusion are increased, the deformation of the coil will be too large, and the coil may be broken, etc.
[0008] In addition, if the heating near the hook portion is insufficient during fusing, the close contact strength between the surface of the hook portion on the coil side in contact with the coil and the commutator segment opposite to this surface is insufficient, and it may be caused by centrifugal force when the motor rotates, etc., And the hook part is floated from the surface of the commutator piece, so that the electrical connection between the coil and the commutator piece is deteriorated, and the performance of the motor may be deteriorated.

Method used

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  • Rotary motor
  • Rotary motor
  • Rotary motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0039] based on Figure 1 to Figure 4 , Embodiment 1 will be described. In addition, in each of the following figures, the same or corresponding parts are described with the same reference numerals.

[0040] figure 1 It is a cross-sectional view of a brushed motor constituting a rotating electrical machine, which is used as a motor for an electric power steering device and the like. figure 2 yes figure 1 An explanatory diagram of the main part near the commutator, image 3 yes figure 2 The explanatory diagram before fusion, Figure 4 It is an explanatory diagram showing the connection relationship of equalizing lines.

[0041] exist figure 1 Among them, four permanent magnets 11 are fixed together with resin holders 12 on the inner peripheral surface of a bottomed cylindrical yoke 10 . The armature 20 includes a commutator 22 and an iron core 24 fixed on the shaft 21. The twenty-two slots included in the iron core 24 have coils (windings) 23 wound in overlapping roll...

Embodiment approach 2

[0092] based on Figure 5 Embodiment 2 will be described. Figure 5 It is an explanatory diagram of main parts near the commutator, and Embodiment 2 differs from Embodiment 1 mainly in the following points.

[0093] The size of the groove portion 44 as the reduced thickness portion 46 is formed to be larger than the segment 40 , whereas the thinned portion 45 is formed to be smaller than the segment 40 .

[0094] By adjusting the sizes of the reduced thickness portion 46 (groove portion 44 ) and the thinned portion 45 , the heat capacity can be effectively adjusted, and the degree of freedom in setting the fusion conditions can be increased, thereby improving connection reliability and the like.

[0095] Although the thinned portion 45 is formed, in Embodiment 2, the thinned portion 45 is not formed in the range from the commutator segment 40 to the base resin 41 on the inner peripheral side thereof, and the thinned portion 45 is formed in the commutator. In the portion of the...

Embodiment approach 3

[0098] based on Figure 6 Embodiment 3 will be described. Figure 6 This is an explanatory diagram of the main parts around the commutator.

[0099] Embodiment 3 has inclined portions 44a and 44b on both sides in the axial direction of the reduced thickness portion 46 (groove portion 44 ). Although the length in the axial direction is increased, the degree of freedom of selection of forming methods and processing tools is improved.

[0100] In addition, a joint assisting member 48 is provided between the coil side surface 42b of the front end portion 42a of the hook portion 42 and the commutator segment 40 abutting on the coil side surface 42b.

[0101] Joining aid 48 is formed by plating tin (Sn) or the like on the surface of commutator segment 40, such as image 3 As shown, the engagement aid 48 is preformed in the single-piece state of the molded commutator 22 before the coil 23 is latched on the hook 42 .

[0102] Between the surface 42b on the coil side of the front en...

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PUM

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Abstract

A rotary motor can ensure heating around a hook when melting so as to not only guarantee a stable electrical connection between a coil and a commutator sheet but also prevent the coil from being broken, and has good performance. The rotary motor comprises a commutator (22) that has a commutator sheet (40); a hook (42) is formed on one axial end of the commutator sheet (40) as a whole and a slide contact part (43) for contacting with a brush (33) in a sliding way is formed on the other axial end, and the commutator (22) is formed by arranging a plurality of commutator sheets (40) circumferentially; and a coil (23) for electrically connecting the hook (42) by melting, and a thickness reduction part (46) is provided between a front end (42a) of the hook (42) and a sliding contact part (43) and the commutator sheet (40) around the front end (42a).

Description

technical field [0001] The invention relates to a rotating electrical machine comprising a commutator having a hook. Background technique [0002] In a conventional rotating electrical machine, a plurality of protrusions are formed on the side of the hook part that contacts the winding, and the protrusions are made to pierce the coating of the winding during fusion to electrically connect the commutator segments to the winding. (For example, refer to Patent Document 1). [0003] prior art literature [0004] patent documents [0005] Patent Document 1: Japanese Patent Laid-Open No. 10-257736 [0006] In the conventional rotating electrical machine, since a plurality of protrusions are formed on the side of the hook portion that is in contact with the winding (coil), the protrusions are not easy to form. In addition, the wire diameter of the coil becomes larger and the commutation around the hook portion becomes difficult. When the volume of the segment increases, the hea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K13/04
CPCH02K5/148H02K13/00H02K13/006H02K13/04H02K23/00
Inventor 板见亮辅広末渡山本京平
Owner MITSUBISHI ELECTRIC CORP