Patent ID: 8928443
Filing Date: 2015-01-06
Classification: H01F

Abstract:
1. A transformer, comprising: a core; a winding wrapped around the core, the winding including an interior portion and an exterior surface, wherein a passage is formed within the interior portion of the winding; a primary cooling system for cooling the exterior surface of the winding; a secondary cooling system including a high-pressure fluid source fluidly coupled to the passage formed within the interior portion of the winding to provide a cooling fluid to the passage for cooling the interior portion of the winding; a current sensor for detecting current through the transformer; and an actuator configured to activate the secondary cooling system in response to an activation signal indicating a predicted condition of the transformer, wherein the predicted condition is based on an amount of transient current flow through the transformer detected by the current sensor and a duration of transient current flow through the transformer detected by the current sensor.