JP2007189830A5 - - Google Patents

Claims (10)

A stator core having a plurality of pole teeth protruding in the radial direction arranged at equal angular intervals with a slot in between, a stator having a coil wound around the pole teeth, and a predetermined surface on a tip surface of the pole teeth In a permanent magnet type synchronous motor having a rotor provided with permanent magnets in which S poles and N poles are alternately arranged in the circumferential direction on the circumferential surfaces facing each other through a gap, the stator core has a plurality of pole teeth provided with the pole teeth. The permanent magnet type synchronous motor is characterized in that an auxiliary groove for dividing the tip end surface at an equal angle in the circumferential direction is formed on the tip end surface of the pole tooth. . 2. The permanent magnet type synchronous motor according to claim 1, wherein the permanent magnet is composed of a plurality of divided permanent magnets arranged in a circumferential direction. 3. The permanent magnet type synchronous motor according to claim 2, wherein the plurality of divided permanent magnets are arranged in a state in which the divided permanent magnets adjacent in the circumferential direction are separated from each other. 3. The permanent magnet type synchronous motor according to claim 2, wherein the plurality of divided permanent magnets are arranged in a state in which the divided permanent magnets adjacent in the circumferential direction are in contact with each other. 4. The curved permanent magnet according to claim 2, wherein a surface of the split permanent magnet that faces the tip surface of the pole teeth has a curvature that is narrow at the center in the circumferential direction and wide at both sides in the circumferential direction. A permanent magnet type synchronous motor comprising a surface. In any one of Claims 1 thru | or 5, These polar teeth are provided with the front-end | tip part which spreads in the circumferential direction at the front end side, The clearance gap formed between the front-end | tip parts of the adjacent pole teeth in these several polar teeth. A permanent magnet type synchronous motor, wherein an opening area and an opening area of the auxiliary groove are substantially equal. In any one of Claims 1 thru | or 5, These polar teeth are provided with the front-end | tip part which spreads in the circumferential direction at the front end side, The clearance gap formed between the front-end | tip parts of the adjacent pole teeth in these several polar teeth. A permanent magnet type synchronous motor, wherein a depth dimension is substantially equal to a depth dimension of the auxiliary groove. In any one of Claims 1 thru | or 5, These polar teeth are provided with the front-end | tip part which spreads in the circumferential direction at the front end side, The clearance gap formed between the front-end | tip parts of the adjacent pole teeth in these several polar teeth. A permanent magnet type synchronous motor characterized in that the internal volume and the internal volume of the auxiliary groove are substantially equal. 9. The permanent magnet type synchronous motor according to claim 1, wherein the rotor is disposed inside the stator. The plurality of polar teeth according to claim 1, wherein the plurality of polar teeth includes a distal end portion extending in a circumferential direction on a distal end side, and an opening width of a gap formed between the distal end portions of the adjacent polar teeth in the plurality of polar teeth, A permanent magnet type synchronous motor characterized in that the opening width of the auxiliary groove is substantially equal.