Patent ID: 8659378

Claim:
An electric transformer, comprising: a magnetic core; at least one coil assembly which is positioned around a portion of said magnetic core and comprises a plurality of windings, said coil assembly further comprising a plurality of cooling ducts provided at various positions between adjacent turns of said coil assembly; a structure adapted for applying a clamping force on said magnetic core and/or windings, said clamping structure comprising at least a first clamping bar; and a cooling circuit comprised of: said first clamping bar; one or more pipes which protrude transversely from said first clamping bar; and a first fluid diffuser having a ring-shaped body with first and second ends, said first end connected to said at least one coil assembly and said second end connected to said one or more pipes, said cooling circuit adapted for allowing cooling fluid to flow through said first clamping bar, said one or more pipes and said first fluid diffuser towards and inside said at least one coil assembly and one or more of said cooling ducts.