Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1975-05-07
1977-06-07
Skudy, R.
Electrical generator or motor structure
Dynamoelectric
Rotary
318224R, H02K 304
Patent
active
040285723
ABSTRACT:
A polyphase stator winding for three or more phase pole-changeable synchronous machines includes rod-type windings which are encased within each other in a multi-layer arrangement in the stator slots. The winding arrangement will permit for any pole-number pairings occurring in practice an additional degree of free-choice in the selection of the number of poles or speeds, respectively that can be paired with each other, and of the winding pitches and spread values which are advantageous in relation to harmonics content, and in relation to the spread factor and consequently the winding factor as well as with respect to losses. The arrangement of the windings is characterized by selecting, for the two windings, winding pitches which differ from one another by an integer and even constant C expressed by the relation C = w.sub.1 - w.sub.2 where (in the case of wave type windings) the constant C takes values .+-.2, .+-.4, .+-.6 and so forth, where (in the case of lap type windings) the constant C takes the values -2, 0, .+-.4, .+-.6 and so forth, wherein w.sub.1 and w.sub.2 represent the slot pitches, and wherein there is provided for each winding an inter-connecting device including oblique eye-rods for at least one winding designed to bridge the gaps between the rods of the lower layer to be connected and the corresponding rods of the upper layer.
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patent: 3089048 (1963-05-01), Bahn
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patent: 3197686 (1965-07-01), Rawcliffe
patent: 3408517 (1968-10-01), Willyoung
patent: 3673477 (1972-06-01), Broadway
patent: 3794870 (1974-02-01), Broadway
patent: 3825783 (1974-07-01), Duffert
patent: 3898543 (1975-08-01), Broadway
BBC Brown Boveri & Company Limited
Skudy R.
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