US Patent No. 9,355,803

ACTUATOR WITH THERMOMAGNETIC SHUNT, ESPECIALLY FOR TRIGGERING A CIRCUIT BREAKER


Patent No. 9,355,803
Issue Date May 31, 2016
Title Actuator With Thermomagnetic Shunt, Especially For Triggering A Circuit Breaker
Inventorship Philippe Schuster, Grenoble (FR)
Nathalie Caillault, Vourey (FR)
Assignee SCHNEIDER ELECTRIC INDUSTRIES SAS, Rueil-Malmaison (FR)

Claim of US Patent No. 9,355,803

1. An electromagnetic actuator comprising:
a magnetic circuit with a fixed magnetic frame;
a coil configured to be connected to an electrical circuit at its ends;
a magnetic element movable with respect to the frame according to intensity of current flowing in the coil;
a shunt device extending along the axis of the coil, the shunt device comprising a magnetocaloric material for which magnetization
increases with temperature above a first temperature greater than or equal to 330 K and reaches a maximum at a second temperature
of less than 420 K, the magnetization maximum being greater than 40 emu/g.