| 摘要 |
PURPOSE:To improve the detecting accuracy of the rotating position of a motor by arranging one of three projections in parallel with the rolling direction of a silicon steel plate forming a position detecting stator and constructing the mutual inductances of three transformer parts so that the high frequency signal levels of the secondary coils become equal. CONSTITUTION:A position detecting rotor 2 is composed of a disc 3 made of a magnetic material and a shortcircuit ring 4 surrounding the outer periphery of the disc 3, and a window 5 is formed at the ring 4. A position detecting stator 6 disposed outside the rotor is composed by aligning the annular silicon steel plates of the rolling direction in one direction and laminating the plates, and projections 9 projected toward the center in parallel with the rolling direction and two pairs of projections 12, 13 are provided in the inner periphery 7. Further, the mutual inductance of the three transformer parts is composed so that the high frequency signal levels generated at the secondary coils become equal. |
