Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1999-01-19
2000-06-06
Enad, Elvin
Electrical generator or motor structure
Dynamoelectric
Rotary
310 51, 310168, 310269, H02K 100, H02K 524, H02K 1742, H02K 124
Patent
active
060722606
ABSTRACT:
In a switched reluctance machine, the air gap between aligned rotor and stator poles is defined to have an inner region of substantially uniform length and outer regions of increasing length. The outer regions are flanked by extension portions on one or both of the poles that form a radiussed transition region on the pole between each outer region and a side wall of the pole. The at least one of the poles has a waist portion between the extension portions and the body of the lamination. As the rotor rotates with respect to the stator, alignment of the poles more gradually modifies the flux path such that radial forces tending to distort the stator and give rise to vibration and acoustic noise are reduced. The waist portion decreases the inductance of the stator winding in the minimum inductance position of the rotor.
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Dinh Le Dang
Enad Elvin
Switched Reluctance Drives Limited
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