INDUCTION-DYNAMIC DRIVE FOR HIGH-SPEED SWITCHING DEVICES Russian patent published in 1997 - IPC

FIELD: protection of semiconductor converters. SUBSTANCE: device has coil and short-circuited turn which are located in coaxial in slots of magnetic circuit. In addition device has armature which is made from steel and which is rigidly connected to short-circuited turn and rod which engages with contact system of device. magnetic circuit is designed as double-slot laminated system in which ratio between slot length and distance between centers of slots is not greater than 1.5. EFFECT: increased functional capabilities. 2 dwg