Patent ID: 9537389
Date: 2017-01-03
CPC Classifications: B60L,H01F,H02M,Y10T

Claim:
1. An inverter device for railway cars comprising: an inverter circuit that converts DC power into AC power and outputs the AC power; and a transformer that converts a voltage of the AC power output from the inverter circuit, and that outputs AC power at the converted voltage; wherein the transformer includes: wherein the iron core is formed by accumulating rectangular thin plates in which a rectangular hole is provided, the holder includes, a first abutment member that is slab-shaped, having an abutment section that abuts an exterior surface of a coil section at one of said ends, and an extension section that is provided so as to extend from the abutment section in both the first direction and an opposite direction, a second abutment member that is slab-shaped, having an abutment section that abuts an exterior surface at the other of said ends, and an extension section that is provided so as to extend from the abutment section in both the first direction and the opposite direction, and is provided so as to face the extension section of the first abutment member, attachment members of a length shorter than a distance between the exterior surfaces of the plurality of coil sections positioned at said ends, the attachment members being provided between each of the facing extension sections of the first and the second abutment members, and a plurality of bolts and nuts for fastening both ends of the attachment members to the extension sections positioned near the ends of the attachment members, wherein the plurality of bolts and nuts is tightened with a predetermined tightening force, thereby pressing against each of the exterior surfaces of the plurality of coil sections positioned at both ends toward each of the plurality of core sections around which each of the plurality of coil sections is wound with a pressing force at least as great as the maximum value of the electromagnetic force by the slab-shaped first abutment member and the slab-shaped second abutment member.