US 12,464,691 B2
Power conversion device
Ryoko Sasahara, Tokyo (JP); and Manabu Yoshimura, Tokyo (JP)
Assigned to MITSUBISHI ELECTRIC CORPORATION, Tokyo (JP)
Appl. No. 18/030,274
Filed by Mitsubishi Electric Corporation, Tokyo (JP)
PCT Filed Dec. 2, 2020, PCT No. PCT/JP2020/044831
§ 371(c)(1), (2) Date Apr. 5, 2023,
PCT Pub. No. WO2022/118391, PCT Pub. Date Jun. 9, 2022.
Prior Publication US 2023/0378885 A1, Nov. 23, 2023
Int. Cl. H05K 9/00 (2006.01)
CPC H05K 9/00 (2013.01) [H05K 9/0071 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A power conversion device comprising:
a plurality of power conversion units disposed away from a grounding object that is at a ground potential;
a first electric field relaxation shield disposed between the grounding object and the plurality of power conversion units, the first electric field relaxation shield including a first end;
a second electric field relaxation shield including a second end facing the first end with a gap, the second electric field relaxation shield being disposed between the grounding object and the plurality of power conversion units; and
a third electric field relaxation shield disposed between the grounding object and the first electric field relaxation shield so as to be overlapped with the first electric field relaxation shield, the third electric field relaxation shield including a third end, wherein
the first electric field relaxation shield and the second electric field relaxation shield surround the plurality of power conversion units when viewed from a direction in which the first electric field relaxation shield and the third electric field relaxation shield are overlapped with each other, and
the third end includes a protruding portion beyond a position overlapping the first end toward a position overlapping the second end when viewed from the direction in which the first electric field relaxation shield and the third electric field relaxation shield are overlapped with each other.