Pole change dynamo-electric machines
AssigneeTokyo Shibaura Denki Kabushiki Kaisha
InventorsSatoshi Matsuda, Etsuo Kiyohara
Life of this patent
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Abstract
A pole change dynamo-electric machine with three-phase distributed winding is adapted for reconnection to form either one of two different pole numbers and for operation on either one of two different voltages. The adjacent coils of the winding are divided into N coil groups, N being equal to three times the greater one of the pole numbers. Every twelve adjacent coil groups form a set of coil groups. The beginning and end terminals of the specific coil groups within each set are connected and the rest of the terminals are reconnectable.
Claims4
In a pole change dynamo-electric machine having a stator core provided with slots receiving coils of three-phase distributed winding adapted for reconnection to form either one of two pole numbers having a ratio of 1:2 and for reconnection for operation on either one of two voltages having a ratio of about 1:2, the improvement wherein said coils of said winding are divided into coil groups of a number equal to three times the greater one of said pole numbers, each of said coil groups consisting of a coil or coils arranged in adjacent positions and having a beginning terminal and an end terminal, every twelve adjacent coil groups forming a set of coil groups, and the coil groups of each set being consecutively numbered in the order of their positions, and the beginning terminal of the second coil group and the end terminal of the eleventh coil group are connected together, the end terminal of the seventh coil group and the beginning terminal of the tenth coil group are connected together, and the beginning terminal of the ninth coil group and the end terminal of the twelfth coil group are connected together.
Dependencies are inferred from the claim text.