| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a linear motor mechanism suitable for performing open/close driving of a sliding door 10 electromagnetically. <P>SOLUTION: An air core coil array is arranged alternately with first phase air-core coils 5a, 5b, 5c and second phase air-core coils 6a, 6b, 6c at pitch P while being shifted by P/2 and located at a lintel (not shown). On the other hand, a pole array 4 is arranged with poles (N, S) alternately at pitch P and secured to a sliding door (not shown). Movement of the sliding door is detected by means of a photosensor 8 or a magnetic sensor 9. An automatic control circuit 22 switches conducting direction of the air-core coil array depending on the movement of the sliding door. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
