| 摘要 |
PURPOSE:To simplify the construction and the assembling of a DC linear motor by forming a pectinated conductive pattern for detecting the propulsion speed oppositely to a field magnet. CONSTITUTION:A ?-shaped movable magnetic yoke 7 is provided oppositely to a field magnet 6, and movable by a movable roller 8 which is supported to the side of the yoke 7. An armature coil 3 is substantially equal to the pole width of the magnet 6, and the coil group 3 are arranged so as not to be superposed to each other. When the magnet 6 is moved in the moving direction, the pattern 9 relatively moves to the N-, S-poles of the magnet 6, and the frequency detecting output in response to the propulsion speed is obtained from the output terminal of the pattern 9. |
