Line-start permanent-magnet brushless motor with aluminum windings
A technology for permanent magnet motors and electric motors, which is applied to synchronous motors with stationary armatures and rotating magnets, electric components, conductive materials for windings, etc., and can solve the problem of increased material costs for permanent magnets
Inactive Publication Date: 2012-05-09
EMERSON ELECTRIC CO
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Problems solved by technology
Those of ordinary skill in the art can readily recognize that the permanent magnets required for the rotor add significant material cost relative to other typical induction motors
Method used
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[0018] The present invention is capable of many different forms of embodiment. While there are shown in the drawings and described in the specification are certain preferred embodiments of the invention, it is to be understood that these disclosures are made by way of example only. The principles of the invention should not be limited to the particular embodiments disclosed.
[0019] first reference Figure 1-2 , a direct-start brushless permanent magnet motor assembly 20 constructed in accordance with the principles of embodiments of the present invention is described in various applications. While the motor assembly 20 is useful in a wide variety of applications, the illustrated embodiment has particular utility when the motor assembly 20 is configured to drive a scroll, rotary, or piston hermetic compressor. More specifically, as described in detail below, when the motor assembly 20 is disposed on the compressor assembly 22 (see Figure 3-4 ), the motor assembly 20 has s...
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The invention discloses a line-start permanent-magnet brushless motor assembly with aluminum windings. The motor assembly comprises a non-traditional combination of a rotor assembly provided with a plurality of permanent magnets and a stator assembly provided with the aluminum coil windings, wherein, the rotor assembly and the stator assembly are arranged on the motor assembly. By adopting the unique combination with the structural feature, performances of a motor can be obviously enhanced with lower incremental cost. The line-start permanent-magnet brushless motor assembly can be combined in an enclosed compressor. For example, the motor assembly can be used in an air-conditioning system so as to meet the high efficiency standard (such as seasonal energy efficiency grade). By adopting the technical scheme, the line-start permanent-magnet brushless motor with the aluminum windings achieves high efficiency up to at least 90%, and the coil windings are fully composed of aluminum in essence.
Description
technical field [0001] The present invention generally relates to electric motor assemblies. More specifically, the present invention relates to a direct start brushless permanent magnet motor assembly comprising a rotor assembly mounted with a plurality of permanent magnets and a stator assembly having aluminum wound coils. Background technique [0002] Those of ordinary skill in the art will recognize that electric motors are generally known to be very efficient and are commonly used in a variety of industrial applications. For example, an electric motor may be incorporated into a compressor, such as may be used in an air conditioning system, to drive the compression mechanism. Those of ordinary skill in the art will also recognize that direct start brushless permanent magnet motor technology has been effectively used to improve motor efficiency and / or compressor performance. [0003] In general, the addition of permanent magnets to the rotor for direct-start brushless p...
Claims
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IPC IPC(8): H02K21/14H02K1/27H02K1/16
CPCH02K1/223H02K21/46Y10T29/49009H02K3/02H02K3/12H02K1/17H02K1/27
Inventor V·法戈D·曹A·李J·伊
Owner EMERSON ELECTRIC CO