| 摘要 |
<p>PURPOSE:To make a moving-core to move at high speeds by a method wherein magnet path, through the moving-core a second yoke first yoke the moving-core, is put upon a magnet path, through a permanent magnet pole piece the moving-core the first yoke the permanent magnet by an electromagnetic coil. CONSTITUTION:Magnetic flux phi1 and phi2 of a permanent magnet 25 are provided respectively magnetic path through the N-pole a pole piece 24 space A3 a moving-core 21 space C3 the first yoke 22 the S-pole, and the core 21 is attracted to a magnet 25 and then space A3 is closed. Magnetic flux phi3 is provided a magnetic path, through a yoke 28 vertical section 22a of the yoke 22 space C3 the moving-core 21 space B3 the yoke 28, by exciting of a coil 27 and phi1 is put upon phi3 at space B3 and space E3 is closed by means that the core 21 is moved in the W direction. This constitution unnecessitates a returning spring and makes it possible to decrease consumed electric power and to perform the operation at high speed.</p> |
