(1) Material inspection
The electromagnetic steel sheet used to make sensor cores is thoroughly inspected before being stored in inventory.
(2) Core winding
Core winding process
Electromagnetic steel sheet is wound to form cores.
Cores are arranged in a circular basket and heat-treated at a high temperature in an annealing furnace.
Cores are heat-treated at a high temperature in an annealing furnace to relieve mechanical strain and restore the magnetic properties to ensure high performance.
(5) Varnish impregnation and curing
Automated varnish impregnation process
Heat-treated cores are impregnated with varnish.
(6) Primary molding
Primary molding process
A layer of resin is molded onto a portion of each core.
(7) Gap cutting
Gap cutting process
A portion of the each partially molded core is cut to create a gap.
(8) Ultrasonic welding
Photographed from the secondary molding process side
(9) Final inspection
Each sensor core is inspected by an automatic inspection system and the cores are arranged in trays.