Patent ID: 8106550

Claim:
A polyphase alternating-current motor, comprising: a stator; a plurality of coils that are arranged in a circumferential direction of the stator; and a plurality of bus bars the number of which corresponds to the number of phases, and that receive a polyphase alternating-current, wherein the bus bars are arranged at one end portion of the stator, and end portions of the coils are connected to the corresponding bus bars, wherein each of the bus bars has an intermediate electrical path portion that extends along the circumferential direction of the stator, a plurality of end electrical path portions that branch from the intermediate electrical path portion at multiple positions in the circumferential direction of the stator, and that are connected at end portions to the end portions of the coils, and a main electrical path portion that is formed at one position of the intermediate electrical path portion, and that is connected to a motor drive circuit, and wherein a shape of a portion of the intermediate electrical path portion at which the multiple end electrical path portions are formed between the main electrical path portion and an end portion of the intermediate electrical path portion is changed from a portion at which the main electrical path portion is formed toward the end portion of the intermediate electrical path portion in such a manner that the shape is changed after each intervening end electrical path portion.