US 12,262,515 B2
Inverter of compact design
Klaus Rigbers, Goettingen (DE); Thomas Wappler, Guxhagen (DE); Gerrit Braun, Kassel (DE); Andreas Knobloch, Kassel (DE); and Matthias Rehbein, Kassel (DE)
Assigned to SMA Solar Technology AG, Niestetal (DE)
Filed by SMA Solar Technology AG, Niestetal (DE)
Filed on Jun. 3, 2022, as Appl. No. 17/831,867.
Application 17/831,867 is a continuation of application No. PCT/EP2020/084880, filed on Dec. 7, 2020.
Claims priority of application No. 10 2019 133 377.6 (DE), filed on Dec. 6, 2019.
Prior Publication US 2022/0304184 A1, Sep. 22, 2022
Int. Cl. H05K 7/20 (2006.01); H02M 7/00 (2006.01); H05K 1/18 (2006.01); H05K 7/14 (2006.01)
CPC H05K 7/209 (2013.01) [H02M 7/003 (2013.01); H05K 1/181 (2013.01); H05K 7/1432 (2013.01); H05K 7/20163 (2013.01)] 25 Claims
OG exemplary drawing
 
1. An inverter with a rated power of at least 3 kVA, comprising:
a first assembly which comprises a first printed circuit board and a DC/AC converter stage, and
a second assembly which comprises a second printed circuit board and an EMC filter for the DC/AC converter stage,
wherein the first printed circuit board is mounted on a heat sink and lies substantially flat on the heat sink,
wherein the DC/AC converter stage has converter components which comprise power semiconductors, chokes and link circuit capacitors,
wherein the chokes and the link circuit capacitors are arranged together on one side of the first printed circuit board, and the heat sink is arranged on the opposite side of the first printed circuit board,
wherein the chokes and/or the power semiconductors are thermally connected to the heat sink via the first printed circuit board and a thermally conductive material arranged between the first printed circuit board and the heat sink,
wherein the second printed circuit board is arranged on the side of the first printed circuit board opposite the heat sink,
wherein a metal sheet is arranged between the first assembly and the second assembly, and the second printed circuit board is mounted on the metal sheet,
wherein the first assembly comprises at least two chokes, wherein at least two of the chokes and the metal sheet are thermally connected to one another via a thermally conductive material arranged between the chokes and the metal sheet.