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Rotor for a motor and a motor

A rotor and motor technology, applied in the field of motors, can solve problems such as the decline of control performance, achieve the effect of suppressing the reduction of motor efficiency and preventing the separation of magnets and rotors

Inactive Publication Date: 2013-10-30
ICHINOMIYA ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Cogging torque causes vibration and noise generation, and also leads to a decrease in control performance

Method used

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  • Rotor for a motor and a motor
  • Rotor for a motor and a motor
  • Rotor for a motor and a motor

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Experimental program
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Embodiment Construction

[0031] Hereinafter, the present invention will be described in detail according to preferred embodiments with reference to the accompanying drawings. This embodiment is only an example of the present invention, and can be appropriately modified within the scope not changing the gist of the present invention.

[0032] like figure 1 The illustrated brushless motor 10 has a rotor 11 (an example of a rotor for a motor of the present invention), a shaft 12 , a stator 13 , a housing 14 and the like. The case 14 accommodates the rotor 11, the shaft 12, and the stator 13 therein. The rotor 11 has a substantially cylindrical shape and has a plurality of magnets 15 along the circumferential direction ( FIG. 5 ). The rotor 11 is externally fitted to the shaft 12 so as to be integral with the shaft 12 . The shaft 12 is supported by the housing 14 and is rotatable integrally with the rotor 11 . The stator 13 is fixed to the inside of the housing 14 and arranged to cover the periphery o...

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PUM

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Abstract

A first rotor and a second rotor in which first steel plates in which a plurality of first through holes into which magnets are inserted are formed circumferentially apart from each other are laminated such that the first through holes are axially continuous, a second steel plate in which second smaller through holes are formed. circumferentially apart from each other and is laminated axially at one end side, and the magnet inserted into each of the first through holes of the first and second rotor, The first and second rotor are connected to the same shaft such that the second steel plates serve as the outer sides in the axial direction and the position in the circumferential direction of each of the first through hole is shifted.

Description

technical field [0001] The present invention relates to a rotor for a motor and a motor. Background technique [0002] In various brushless motors, cogging torque is generated due to small fluctuations in the magnetic attraction force between the stator and rotor based on the rotation angle. The cogging torque causes generation of vibration and noise, and also causes deterioration of control performance. Therefore, it is desirable to reduce the cogging torque as much as possible. The cogging torque is generated based on the correlation between the change in reluctance due to the rotation of the rotor and the distribution of the magnetic field generated by the magnet. [0003] In order to reduce the cogging torque, in some cases, the brushless motor is configured such that the phases of the magnets are sequentially shifted along the axial direction of the shaft. Therefore, it is possible to suppress cogging torque by suppressing sudden changes in the magnetic field associa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K29/03H02K1/27H02K15/03
CPCH02K1/276H02K29/03H02K2213/03
Inventor 木梨好一
Owner ICHINOMIYA ELECTRIC