Induction Heating multi wire bundles of rotor with different shape induction coils

Objective • Heating the ends of mult wires on a starter motor to remove the electrical varnishes
Material Starter motor with multi wire bundles, each wire consists of 3 wires 0.04” (1.0mm) diameter each
Temperature 1202 ºF (650 ºC)
Frequency• 300 kHz
Equipment • Power of 20kW (UM-20AB-UHF) induction heating system, equipped with a remote workhead containing two 0.5μF capacitors for a total of 0.25 μF.
• An induction heating coil, designed and developed specifically for this application.
Process A six position coil with three turn helical coils at each position is used to simultaneously heat 0.8” (20mm) length at the end of each copper wire bundle for 2~10 seconds to burn off the electrical varnish.
Results Induction heating provides:
• Hands-free heating that involves no operator skill for manufacturing.
• Multi-position coil provides simultaneous heating for quicker production times.
• Complete removal of varnish improves electrical performance of connections.
• Even distribution of heating.

Induction Heating multi wire bundles of rotor with a cambered induction coil

Induction Heating multi wire bundles with a cambered induction coil

Induction Heating 3 wire bundles with a 3 heads induction coil

Induction Heating 3 wire bundles of rotor with a 3 heads induction coil

Induction Heating 3 wire bundles of motor with a 3 heads induction coil