Rotary compressor with permanent magnet motor

Abstract

A rotary compressor comprising a rotor having a plurality of permanent magnets mounted thereon and a stator, where the rotor is aligned with respect to the stator via a magnetic attraction between the permanent magnets and the stator. The compressor includes a housing and is configured such that the rotor does not entirely bear against a top or bottom portion of the compressor housing. The permanent magnets of the rotor are sized and configured such that the magnetic attraction between the magnets and the stator, regardless of whether the stator is energized, positions, or suspends, the rotor substantially intermediate the top and bottom portions of the housing. As a result, less or, possibly, even no friction is experienced between the rotor and the compressor housing which reduces the potential for the rotor to seize or stall and allows the compressor to be operated with little or no oil.

Description

CROSS REFERENCE TO RELATED APPLICATION

[0001] This application claims the benefit under 35 U.S.C. §119(e) of U.S. Provisional Patent Application Ser. No. 60 / 675,623, entitled ROTARY COMPRESSOR WITH PERMANENT MAGNET MOTOR, filed on Apr. 28, 2005, the entire disclosure of which is hereby expressly incorporated by reference herein.BACKGROUND OF THE INVENTION

[0002] 1. Field of the Invention

[0003] The present invention relates to rotary compressors. More specifically, the present invention relates to rotary compressors including a rotor and a stator where the rotor includes permanent magnets which align the rotor with respect to the stator.

[0004] 2. Description of the Related Art

[0005] Electronic components, such as microprocessors and other integrated circuits, for example, typically generate a lot of heat during operation. Dissipating this heat has become increasingly important to improve the working life and efficiency of these components. In the past, air based cooling systems wer...

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