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Electric motor

A technology for motors and rotor bushings, applied in the field of motors, can solve the problems of motor performance degradation, failure to obtain rotation and torque values, etc., and achieve the effects of preventing eddy currents and improving magnetic flux transmission

Inactive Publication Date: 2015-05-06
ARCELIK AS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to maintain the magnetic flux passage between the rotor and the stator, the metal bushing is made of magnetic material, but since the eddy current generated along the axial direction prevents the transmission of the magnetic flux, even if the increase in the noise level is avoided, it is still observed Decrease in motor performance and failure to obtain desired rotation and torque values

Method used

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Embodiment Construction

[0024] The electric motor (1) comprises a stator (2) generating a magnetic field and formed of ferromagnetic laminations (L1) stacked in layers, and a ferromagnetic lamination (L2) placed in the stator (2) and formed of stacked ferromagnetic laminations (L2) rotor core (3).

[0025] The rotor core (3) includes a plurality of winding slots (4) along its circumference in which windings are placed, and a plurality of radial teeth extending to the outside and located between the winding slots (4).

[0026] The motor (1) of the present invention comprises a rotor bushing (5) fixed on the cylindrical outer circumference of the rotor core (3) in a press-fitting manner, the rotor bushing covering the winding slots (4) and the winding and stacked by layers ( Figure 1-4 ) of annular ferromagnetic laminations (L3) are formed.

[0027] The inner diameter (r) of the rotor bush (5) is sized approximately the same as the outer diameter of the rotor core (3). The outer diameter (R) of the...

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Abstract

The present invention relates to an electric commutator motor (1) that comprises a stator (2) and a rotor core (3), wherein the magnetic flux transmittance between the rotor (3)-stator (2) is improved and the noise level is reduced by securing a ferromagnetic rotor sleeve (5) on the outer circumference press-fittingly. The sleeve is made of a ring shaped ferromagnetic laminations.

Description

[0001] This application is a divisional application of a patent application filed on April 26, 2010 with the application number 200880114020.4 and the name "electric motor". technical field [0002] The invention relates to an electric motor comprising a stator and a rotor rotating within the stator. Background technique [0003] In an electric motor, rotor windings are wound into winding slots located on a rotor core configured as cylindrically stacked laminations stacked in layers. The winding slots divide the outer circumference of the rotor core into separate segments creating a geometric discontinuity. During operation of the electric motor, this discontinuity leads to an increase in noise due to magnetic and aero-acoustic signals. [0004] Usually, a cylindrical bushing made of magnetic or non-magnetic material or plastic tape is used, which is fixed on the rotor by shrinkage and completely wraps around the outer circumference of the rotor to prevent discontinuiti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K23/40H02K1/26H02K3/493
CPCH02K1/26H02K3/493H02K23/40H02K1/28H02K3/42H02K3/51
Inventor A.巴哈迪尔
Owner ARCELIK AS