| 摘要 |
<p>The driving rotor of a shutter consists of a thin plate formed from a transparent, thermosetting, epoxy resin. A heat treatment operation is carried out after the etching process to produce the conducting coil pattern, and the magnetic field of the stator is reinforced by making the gap of the magnetic field narrow. The heat treatment accelerates the polymerisation process and is carried out in an atmosphere of nitrogen to prevent oxidn. of the conductors. The reduced dimensions of the stator make for a magnetic field of ample size, and the coefft. of electromagnetic conductivity is as great as possible, with the rotor thin and well flattened.</p> |
