Axail air gap type electric motor

A technology of axial air gap and motor, which is applied in electric components, synchronous motors with stationary armatures and rotating magnets, electromechanical devices, etc., can solve the problem of small size and light weight, unavoidable large stator and increased loss and other problems, to achieve the effect of improving torque, preventing magnet rotation, and reducing resistance value

Active Publication Date: 2008-05-21
FUJITSU GENERAL LTD
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  • Abstract
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  • Claims
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Problems solved by technology

However, in this way, although the torque is improved with the same number of turns, if the same number of turns is achieved with a large-diameter winding, the enlargement of the stator part cannot be avoided, and it cannot meet the requirements of electric bicycles. Small and lightweight
[0009] In order to increase the current value I, it can also be considered to increase the voltage applied to the winding, but this will also increase the loss (copper loss, iron loss, etc.), and the efficiency is not high.
Furthermore, there is also a problem of increasing the size of the battery for applying high voltage

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Embodiment 1

[0034] Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view schematically showing the internal structure of an axial air gap motor according to the present invention. As shown in FIG. 1 , an axial air-gap motor 10 includes a substantially disk-shaped stator 11 and a pair of rotors 12 and 13 disposed opposite to each other with a predetermined gap on both sides of the stator 11. The rotors 12 and 13 The same rotor output shaft 14 is shared, and the stator 11 has a bearing portion 15 for supporting the rotor output shaft 14 on its inner peripheral side.

[0035] The stator 11 includes a ring-shaped (so-called toroidal) stator core 16 and a bearing portion 15 coaxially inserted into the inner peripheral side of the stator core 16 , which are integrally molded from a synthetic resin 18 .

[0036] In addition, in this description, when a bearing part is shown, it means the whole structure which fixes a shaft includ...

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Abstract

The object is to provide an axial air gap type electric motor which realizes a torque up without an increase of the size of the electric motor. The axial air gap type electric motor comprises a stator and two rotors each of which is molded almost with a discoid shape and which are arranged as facing an identical rotation axis with a fixed gap. Said stator has a stator core comprising 3n (n indicates an integer of 2 or higher) pole members ,said pole members with three-phase configuration are connected in parallel, moreover, said rotors are formed with multiple magnets molded like a ring at an equal interval at positions facing the annular stator core when facing said stator, and the ratio of the number of said pole members and the number of the magnets becomes 3n:4n (n indicates an integer of 2 or higher).

Description

technical field [0001] The present invention relates to an axial air-gap motor, which includes a stator and a rotor respectively formed in a substantially disk shape and disposed opposite to each other with a predetermined gap on the same rotating shaft. A configuration of an axial air gap motor that achieves torque boost without increasing the winding diameter. Background technique [0002] Conventionally, there is an axial air gap motor (axial gap motor) as one type of electric motor. Axial air-gap motors are motors in which rotors are arranged opposite to each other in the axial direction with a predetermined gap on a disc-shaped stator. Compared with radial air-gap motors, the axial length can be shortened to realize the motor itself. Advantages of thinning. For example, the present applicant has already applied for Patent Document 1 regarding such an axial air-gap motor. stator assembly work. [0003] In addition, as in Patent Document 2, various electric bicycles h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K21/24H02K1/14H02K3/34H02K1/27
CPCH02K21/24H02K11/33H02K2203/03H02K7/116
Inventor 小岛智则丹野俊昭前山研松崎博和田边洋一
Owner FUJITSU GENERAL LTD
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