Electric motor rotor and its producing method

A technology for electric motors and rotors, applied in the field of producing said rotors, can solve problems such as inconsistencies
CN1190878CInactive Publication Date: 2005-02-23EMPRESA BRASILEIRA DE COMPRESSORES SA (EMBRACO)
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
EMPRESA BRASILEIRA DE COMPRESSORES SA (EMBRACO)
Publication Date
2005-02-23
Estimated Expiration
Not applicable · inactive patent

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Abstract

An electric motor rotor and a method for producing an electric motor rotor, said rotor comprising: a core (10), formed by a plurality of metallic laminations (11) of a magnetic material; polar peripheral portions (20) made of a magnetic material and affixed around the core (10); and an equal number of magnet elements (30) retained between the polar peripheral portions (20) and the core (10), the rotor having its cylindrical lateral surface defined by the polar peripheral portions (20), which are circumferentially spaced from each other, and by intermediate peripheral portions (40) provided between each two adjacent polar peripheral portions (20) and having throughout their longitudinal extensions reduced electrical conductibility and reduced magnetic permeability in relation to the core (10), at least in the regions connecting two adjacent polar peripheral portions (20). The rotor further comprises a pair of end caps (50) for retaining the polar peripheral portions (20) to the core (10).
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Description

technical field

[0001] The invention relates to the construction of a rotor for a brushless electric motor and to a method for producing said rotor with magnet elements arranged inner circumferentially and spaced radially from the side surface of the rotor. Background technique

[0002] In the construction of the brushless motor rotor, permanent magnet elements are fixed to the iron core of said rotor so as to be concentrically mounted around the motor shaft. In this configuration, the rotor is formed from a plurality of overlapping metal laminations in longitudinal alignment defining a lamination pack, each metal lamination having a plurality of circumferential pairs equidistant from each other and at an angle to the motor shaft. The windows are aligned with the corresponding windows of the other metal laminations of the stack so as to define an axial housing in which the magnet elements are mounted and fixed.

[0003] In prior art constructions, each metal lamination of t...

Claims

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