Patent ID: 6815859
Filing Date: 2004-11-09
Classification: H02K

Abstract:
A synchronous reluctance motor comprising:a stator having a predetermined number of toothed stator magnetic pole portions wound by armature coils, and a rotor rotatably supported at an inner peripheral surface of the stator and having a pair of slots formed in a circumferential direction of the rotor and extending along the inner periphery of the stator with a predetermined interval, wherein the pair of slots includes an outer side slot formed at an outer periphery side of the rotor and an inner side slot formed at an inner side of the rotor, both the outer side slot and the inner side slot extend toward the outer peripheral surface of the rotor to form a rotor magnetic pole portion, and wherein a width of an effective magnetic path between the outer periphery of the rotor and the outer side slot is defined based on a width of a stator magnetic pole portion multiplied by a predetermined number in a range of 0.7 and 1.3; and wherein a phase number of the synchronous reluctance motor is m, a ratio of a number of the stator magnetic role portions relative to a number of the rotor magnetic pole portions is n, a first opening angle is formed by lines connecting a rotational center of the rotor with two cross points, the two cross points formed by the outer periphery of the rotor and a center-line of a magnetic flux path between the outer side slot and the inner side slot, a second opening angle is formed by center-lines of adjacent stator magnetic pole portions in the circumferential direction of the stator, and wherein the first opening angle is determined based on the second opening angle multiplied by (n/2 m) and a second predetermined number.