Method for Fabrication of a Shorted Turn Assembly
Original Publication Date: 1983-Aug-01
Included in the Prior Art Database: 2005-Feb-07
The permanent magnet portion of voice coil actuator is shown with a part cut away in Fig. 1 and in section in Fig. 2. It has an outer housing 1 of magnetic material and a cylindrical magnet 2. A shorted turn 3 has flared ends 4 and 5 which bear against end seals 6 and 7, respectively. In the case where the permanent magnet is made of flexible material, it is important that there is good contact between the outer surface of magnet 2 and the inside of outer housing 1. Fabrication of the assembly is accomplished by placing the magnet 2 and end seals 6 and 7 inside the housing 1. The shorted turn 3, of copper or other soft conducting material, is positioned with the ends equidistant from the end seals 6 and 7.