Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1980-07-30
1982-09-07
Skudy, R.
Electrical generator or motor structure
Dynamoelectric
Rotary
310194, H02K 300
Patent
active
043486061
ABSTRACT:
An armature winding for a three-phase induction motor is provided with slots in each of which are placed windings having a double-layer structure. The number of slots, q per pole per phase is: q=z/(3.times.P), and q is less than 1/2, where z denotes the number of slots of the stator, and P the number of poles. The number of coils, Q, per phase is: Q=z/3. The coils constitute real poles of the same polarity, the number of which is also Q, and further provide one or more imaginary poles between the real poles. The coils are connected in such a way that the voltage vector of each phase is completely balanced.
REFERENCES:
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patent: 2414571 (1947-01-01), Veinott
patent: 3325661 (1967-06-01), Parsons
patent: 3794870 (1974-02-01), Broadway
patent: 3927358 (1975-12-01), Broadway
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Theory and Design of Small Induction Motors, by C. G. Veinott, published by McGraw-Hill Book Co., Inc., 1959, pp. 145-148.
The Nature of Polyphase Induction Machines, by P. L. Alger, Published by John Wiley & Sons, Inc., 1951, pp. 267-271.
Japanese Patent Disclosure No. 51-107409, "Windings of Polyphase Induction Motors", by Toshikichi Hatisuka, Tahashi Nati, published by Japanese Patent Agent, Sep. 24, 1976.
"Special Fractional-Slot Winding (q1/2) and Its Application" by Sadayoshi Hibino, Tetuya Hiramatu, Nobuo Takechi published by I.E.E. of Japan (Tokai Conference, 9/1977).
Skudy R.
Tokyo Shibaura Denki Kabushiki Kaisha
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