US 11,705,816 B2
Isolation transformer, and power conversion device in which the isolation transformer is used
Hayato Tanabe, Tokyo (JP)
Assigned to Mitsubishi Electric Cornoration, Tokyo (JP)
Filed by Mitsubishi Electric Corporation, Tokyo (JP)
Filed on Feb. 19, 2021, as Appl. No. 17/179,588.
Claims priority of application No. JP2020-115342 (JP), filed on Jul. 3, 2020.
Prior Publication US 2022/0006388 A1, Jan. 6, 2022
Int. Cl. H02M 3/335 (2006.01); H01F 27/24 (2006.01); H01F 27/02 (2006.01); H01F 27/28 (2006.01)
CPC H02M 3/33573 (2021.05) [H01F 27/02 (2013.01); H01F 27/24 (2013.01); H01F 27/28 (2013.01); H01F 27/2876 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An isolation transformer, comprising:
a core portion that forms a magnetic circuit; and
at least two kinds of winding, on a high voltage side and a low voltage side, wound around the core portion,
each of the two kinds of winding being formed in winding layers, wherein
the two kinds of winding include windings formed in a multiple of winding layers,
a winding layer having a different number of turns exists in one or more kinds of the two kinds of winding among the windings formed in the multiple of winding layers,
winding layers wherein current flows in the same direction are stacked in such a way as not to be neighboring, and at least one of winding layers having the greatest number of turns is disposed as a layer other than an outermost layer.