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Axial gap type motor and a method for manufacturing rotor thereof

A technology of axial clearance and manufacturing method, which is applied in the manufacture of stator/rotor bodies, synchronous motors with stationary armatures and rotating magnets, electric components, etc., can solve problems such as the inability to prevent motor torque reduction and efficiency reduction, Achieve the effect of suppressing the short circuit of the magnetic force line and suppressing the torque reduction

Inactive Publication Date: 2010-06-02
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the axial gap motor described in this Patent Document 1, the portion between the circumferentially adjacent magnetic pieces 103, 103 is formed of an electromagnetic steel sheet 102, so the magnetic flux is short-circuited between the circumferentially adjacent magnetic pieces 103, 103, As a result, a reduction in torque and / or a reduction in efficiency of the motor cannot be prevented

Method used

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  • Axial gap type motor and a method for manufacturing rotor thereof
  • Axial gap type motor and a method for manufacturing rotor thereof
  • Axial gap type motor and a method for manufacturing rotor thereof

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no. 1 approach

[0041] For example figure 1 and figure 2 As shown, the axial gap motor 10 in this embodiment has the following components: a substantially annular rotor 11 arranged to be rotatable around the rotation axis O of the axial gap motor 10; a pair of stators 12, 12 , which are disposed opposite to each other so as to sandwich the rotor 11 from both sides in the direction of the rotation axis O, and have multiphase stator windings for generating a rotating magnetic field for rotating the rotor 11 .

[0042] The axial gap motor 10 is mounted in vehicles such as a hybrid vehicle or an electric vehicle as a drive source, and its output shaft is connected to an input shaft of a transmission (not shown), whereby the driving force of the axial gap motor 10 It is transmitted to the driving wheels of the vehicle (not shown) via the transmission.

[0043] In addition, when the driving force is transmitted from the driving wheel side to the axial gap motor 10 when the vehicle is decelerati...

no. 2 approach

[0071] Next, a second embodiment of the present invention will be described with appropriate reference to the drawings.

[0072] Figure 8 It is a schematic view of the rotor core of the axial gap motor according to the second embodiment viewed from the circumferential direction. In addition, the axial gap motor 10A of the second embodiment has the same structure as the axial gap motor 10 of the first embodiment except for the structure of the rotor core 13. Use the same symbols and omit repeated explanations.

[0073] Such as Figure 9 As shown in (a), the magnetic plate 14 constituting the part corresponding to the first layer of the rotor core 13 is arranged from the left side in the figure for a sub-permanent magnet piece on which the outer connecting portion 61 (mechanical strength maintaining portion) is formed. The holes 17 and the four hole portions 17 for the sub-permanent magnet sheet in which the outer magnetic flux short-circuit suppressing portion 62 (magnetic ...

no. 3 approach

[0083] Next, a third embodiment of the present invention will be described.

[0084] The axial gap motor of the third embodiment is formed by demagnetizing the inner connection portion 51 and the outer connection portion 61 of the axial gap motor 10A of the second embodiment by heat treatment. Accordingly, it is possible to suppress a short circuit of the magnetic flux via the inner connection portion 51 and the outer connection portion 61 .

[0085] In this case, after forming the hole 15 for the main magnetic sheet, the magnetic flux leakage suppression space 16 and the hole 17 for the auxiliary permanent magnet sheet 14 on the strip-shaped magnetic plate 14, the inner connection part 51 and the outer connection part are fixed before winding. 61 Performing heat treatment to demagnetize (heat treatment process) before winding can suppress the performance deterioration of the motor and can suppress the short circuit of the magnetic flux.

[0086] In addition, in the third emb...

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Abstract

An axial gap type motor 10 includes: a rotor 11 having a rotor core 13, the rotor core 13 including: multiple main magnet pieces 41 respectively magnetized in a direction of the rotation axis O of the rotor, and multiple main magnet piece storing hole portions 15 respectively for holding associated main magnet pieces; and a pair of stators 12 to be mounted onto the rotor 11, wherein the rotor core 13 is structured by winding a tape-shaped magnetic plate 14, and includes a first winding layer and a second winding layer; and in portions of the first and second winding layers that are situated in the same phase from the center of rotation of the rotor core 13, the first winding layer includes an outside magnetic flux short preventive portions 62, and the second winding layer includes an outside connecting portions 61.

Description

technical field [0001] The invention relates to an axial gap motor and its rotor manufacturing method. Background technique [0002] Conventionally, for example, an axial gap motor is known, which has a rotor rotatable around a rotation axis and a stator disposed opposite to the rotor from at least one side in the direction of the rotation axis, The field flux generated by the permanent magnet forms a flux loop passing through the stator (for example, Patent Document 1). [0003] Such as Figure 10 As shown, in the axial gap type motor described in the above-mentioned Patent Document 1, the rotor core 101 is formed by winding a strip-shaped electromagnetic steel sheet 102 and placing the wound rotor core 101 at equal intervals in the circumferential direction. The opening 104 for accommodating the magnetic sheet 103 is provided in a grounded manner. [0004] Patent Document 1: Japanese Patent Laid-Open No. 2006-166635 [0005] In the axial gap motor described in this Pate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K21/24H02K1/27H02K15/03
CPCH02K21/24H02K1/2793Y10T29/49012H02K1/2796
Inventor 田嶋茂山本惠一
Owner HONDA MOTOR CO LTD