Pyrotechnic fuse
AssigneeSolaredge Technologies Ltd.
InventorsYuval Keren, Aya Kittany
Life of this patent
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Abstract
Systems and methods described herein are directed to a pyrotechnic fuse comprising a magnetic concentrator configured to partially surround at least a portion of a busbar, wherein the magnetic concentrator may comprise an aperture, a pyrotechnic actuator (which may be coupled to the busbar and configured to stop electrical flow in the busbar when the pyrotechnic actuator is activated), and a magnetic switch (which may be located within or near the aperture). The magnetic switch may be configured to activate the pyrotechnic actuator when a current through the busbar reaches a threshold current. An angle of the magnetic switch relative to the aperture may determine the threshold current.
Claims21
An apparatus comprising:
- a magnetic concentrator configured to partially surround at least a portion of a busbar, wherein the magnetic concentrator comprises an aperture;
- a pyrotechnic actuator, coupled to the busbar and configured to stop electrical flow in the busbar when the pyrotechnic actuator is activated;
- and
- a magnetic switch, located within the aperture, wherein the magnetic switch is configured to activate the pyrotechnic actuator when a current through the busbar reaches a threshold current, and wherein an angle of the magnetic switch relative to the aperture determines the threshold current, wherein the magnetic switch is rotatable about an axis of the aperture.
A method comprising:
- positioning a magnetic concentrator around at least a portion of a busbar, wherein the magnetic concentrator comprises an aperture and a magnetic switch, wherein the magnetic switch is rotatable about an axis of the aperture;
- setting an angle of the magnetic switch near or within the aperture, wherein the magnetic switch forms a circuit with a pyrotechnic actuator, wherein the angle determines a threshold current;
- and
- activating the pyrotechnic actuator when a current of the busbar reaches the threshold current, such that electrical flow in the busbar is substantially stopped.
A system comprising:
- a busbar;
- a magnetic concentrator configured to partially surround at least a portion of the busbar, wherein the magnetic concentrator comprises an aperture;
- a pyrotechnic actuator coupled to the busbar, wherein the pyrotechnic actuator is configured to stop electrical flow in the busbar when the pyrotechnic actuator is activated;
- and
- a magnetic switch located near or within the aperture, wherein the magnetic switch is configured to activate the pyrotechnic actuator when a current in the busbar reaches a threshold current, wherein an angle of the magnetic switch relative to the aperture determines the threshold current, wherein the magnetic switch is rotatable about an axis of the aperture.
Dependencies are inferred from the claim text.