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Permanent magnet rotor and method thereof

A technology of permanent magnets and rotors, applied in the field of electric motors, can solve problems such as limited service life of adhesives

Active Publication Date: 2014-05-14
REGAL BELOIT AMERICA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, adhesives have a limited lifetime due to factors such as temperature, temperature cycling and environmental conditions

Method used

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  • Permanent magnet rotor and method thereof
  • Permanent magnet rotor and method thereof
  • Permanent magnet rotor and method thereof

Examples

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Embodiment Construction

[0035] Due to the increased cost of rare earth magnets and copper for windings, lower cost alternative materials are desirable in the design and manufacture of electric motors. The present invention provides designs and methods for using alternative materials for rare earth magnets and copper windings, while reducing or offsetting efficiency losses associated with these alternative materials, and reducing or eliminating increases in motor length.

[0036] figure 1is a perspective cutaway view of an exemplary electric motor 10 . Although referred to herein as electric motor 10, electric motor 10 may function as either a generator or a motor. The electric motor 10 includes a first end 12 , a second end 14 and a motor assembly housing 16 . The electric motor 10 also includes a stationary assembly 18 and a rotatable assembly 20 . Motor assembly housing 16 defines interior 22 and exterior 24 of electric motor 10 and is configured to at least partially enclose and protect station...

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Abstract

In one embodiment, an electric machine is provided. The electric machine includes a machine housing and a stator disposed at least partially within the housing. The stator comprises a plurality of teeth and an aluminum winding wound around at least one tooth of the plurality of teeth. The electric machine further includes a radially embedded permanent magnet rotor disposed at least partially within the housing; and the rotor comprises at least one radially embedded permanent magnet and configured to provide increased flux to reduce motor efficiency loss compared to a copper winding.

Description

technical field [0001] The field of the invention relates generally to electric motors, and more particularly, to radially embedded permanent magnet rotors and alternative materials for electric motors. Background technique [0002] Various types of electric motors include permanent magnets. For example, a brushless direct current (BLDC) motor may include a plurality of permanent magnets attached to the outer surface of the rotor core. Typically, the permanent magnets are attached to the rotor core outer surface using an adhesive and / or an external retaining cover. This connection between the permanent magnets and the rotor core must resist the forces exerted on the permanent magnets during high speed rotation which tend to separate the permanent magnets from the motor. [0003] The permanent magnets can also be arranged inside the rotor core, which is usually called an internal permanent magnet rotor. Slots are formed inside the rotor, and the magnets are inserted into t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/27H02K1/16H02K15/00
CPCH02K1/27H02K15/00H02K21/16H02K1/02H02K3/02H02K15/02H02K2213/03Y02P80/30Y10T29/49009H02K1/16
Inventor S·M·布拉马瓦
Owner REGAL BELOIT AMERICA
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