| 摘要 |
PURPOSE:To perform relative linear motion in either direction of inner our outer cylinder with a simple and inexpensive structure by detecting the relative position between the inner cylinder and the outer cylinder with a Hall element and flowing a current in the prescribed direction in an armature coil. CONSTITUTION:When an inner cylinder 1 and an outer cylinder 3 are opposed so that a Hall element 11 detects the N pole or S pole of a field magnet 2, a component semiconductor rectifier in a semiconductor rectifier is driven, and a current of the prescribed direction is flowed through an armature coil 4. Accordingly, either the cylinder 1 or 3 performs relative linear motion according to Flaming's left hand law. |
