Solenoid.

摘要

A solenoid has one or more injection molded components (2-2c, 6, 7) of a magnetic return circuit of the solenoid, particularly the magnetically permeable can (2). The components are injection molded from a polymer having a filler of soft magnetic material at preferably a 20-63% by volume loading level. The injection molded polymer filled solenoid has higher efficiencies than expected based on the decrease in total metal content.