Title of Invention | REDUCED NOISE RELUCTANCE MACHINE |
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Abstract | The present invention relates to a reduced noise reluctance machine comprising a stator defining a plurality of inwardly projecting stator poles, wherein the projecting stator poles defme inter-pole regions between the stator poles and a central bore, and where each stator pole terminates in a region defining a concave surface, where the concave surface has a given radius of curvature; at least one phase winding having a winding coil that is wound about at least one of the stator poles, where ponions of the winding coil are positioned in at least one inter-polar region, and where the portion of the winding coil has an outer surface facing the central bore; and a contoured top-stick positioned within the at least one inter-polar region on the outer surface of the portion of the winding coil, wherein the contoured top-stick has an outer concave surface where the radius of curvature of the top-stick's outer surface is substantially the same as the given radius of curvature |
Full Text | RF.DUCRDNOISF RI'U,U( 1 AN( i MA(IIINI; MELD OF THF IN V ENTIO * This invention in genera! rehtes to reluctance m idiines ai c machine systems and, i-1 particular, to switched reluctance machines and machine systems. More specifically, the present invention relates to a method and apparatus for improving the performance of a switched reluctance machine by reducing noise. BACKGROUND OFTKS INVENTION Reluctance machines are well known in the art. n general i reluctance machine is an electric machine in which torque is produced by the tendency of a movabl* part to move to a posilii n where the inductance of an excited winding is maximized (i.e. the tiuctance s minimized). In one type of reluctance machine the phase win i ngs are ; lergized at a controlled frequency. This type of reluctance machine is generally referred to a a synchronous reluctance machine. In another type of reluctance machine, circuitry' is provided to detei line the rosition of the machine's otor, and the windings of a phase are energized as a function of rotor 3 xsition. 1 his type of reluctance machine is generally referred to as a switched reluctance machine. / Ithough the description of the cuirent invention is in the context of a switched reluctance machine, the r r sent invention is applicable to all forms o\ reluctance machines, including synchronous and switch t \ relucta i;e motors and to other ni lehines that have phase winding arrangements similar to those of sv i ched rel jctance machines. The general theory of design and operation of switched reluctance machines is wdl known and discussed, for example in The Characteristics, Design aid Appl As a switched reluctance motor (or generator) operates, r lagnetic flux is continuously in* leasing and decreasing in different parts o*' the machine. The |
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2175-mas-1997-claims duplicate.pdf
2175-mas-1997-claims original.pdf
2175-mas-1997-correspondance others.pdf
2175-mas-1997-correspondance po.pdf
2175-mas-1997-description complete duplicate.pdf
2175-mas-1997-description complete original.pdf
Patent Number | 204461 | |||||||||||||||
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Indian Patent Application Number | 2175/MAS/1997 | |||||||||||||||
PG Journal Number | 26/2007 | |||||||||||||||
Publication Date | 29-Jun-2007 | |||||||||||||||
Grant Date | 22-Feb-2007 | |||||||||||||||
Date of Filing | 01-Oct-1997 | |||||||||||||||
Name of Patentee | EMERSON ELECTRIC CO, | |||||||||||||||
Applicant Address | 8000 WEST FLORISSANT AVENUE, ST, LOUIS, MISSOURI 63136, USA. | |||||||||||||||
Inventors:
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PCT International Classification Number | H02K1/14 | |||||||||||||||
PCT International Application Number | N/A | |||||||||||||||
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