Self-Supported Coils (sometimes called
Air Core Coils) are ideally suited where dimensional
constraints preclude the use of a bobbin or
other coil form. Complex shapes can be formed
by employing the winding arbor and/or post heating in a
forming tool.
Self Supported Coils are achieved by using wire with a bondable coating activated by solvents, resistance
heating, or post baking. These processes secure the magnet
wire strand to strand.
Magnet wire is available with underlying insulation up
to 180°C. The bonding materials do soften
at temperatures of 125°C to 150°C.
In applications where impregnation or
varnish processes are not desirable, coil bonding using
bondable wire is employed to prevent movement or abrasion
of wire (strand to strand). |