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US 9,355,803 B2Granted
Actuator with thermomagnetic shunt, especially for triggering a circuit breaker
AssigneeSchneider Electric Industries SAS
InventorsPhilippe Schuster, Nathalie Caillault
Life of this patent
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Abstract
An electromagnetic actuator including a saturable magnetic shunt system. The shunt is associated with a coil of the actuator and allows channeling of a more or less large part of the flow according to current circulating in the product. In this way, when the actuator is used in a circuit breaker, the actuator allows the circuit breaker to be triggered from a short circuit as usual and also from overload caused by action of the shunt.
Claims9
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.
1 more element
Dependencies are inferred from the claim text.