Multipolar excitation systems
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United States of America Patent
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-
Dec 9, 1986
Grant Date -
N/A
app pub date -
Feb 13, 1985
filing date -
Jun 15, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A D.C. excited rotor winding arrangement for a dynamoelectric machine comprises at least one closed loop (1,2,3) of three or more series-connected winding sections (10,11,12,13,16,17,18,19,20,21,22,23) with at least three current-supply terminals (ABCD) at their interconnections. At least one pair of adjacent winding sections (10,13; 11,12) generate opposite magnetic poles when fed in parallel with current from their common supply terminal (such terminals are designated 'odd', as opposed to 'even' terminals which are each associated with two poles of the same sense) and the pole number is varied by switching the current supply from 'odd' to 'even' terminals or vice versa. Preferably the winding arrangement comprises a plurality of series-connected closed loops (1) of four winding sections interconnected at two odd (B5, D5) and two even (A5, C5) terminals. Preferably the winding arrangement is fed with current from one of a plurality of rotating rectifiers (4,6,7) according to the pole number required.
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