POWER CONVERSION DEVICE

• Main Author: ISHIKURA YUKI
• Format: Patent
• Language: English; Japanese
• Published: 10.06.2024
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION

To solve such a problem that noise is generated due to parasitic capacitance occurring between a power conversion circuit and a metal housing, in a power conversion device.SOLUTION: A power conversion device 10 includes: a metal housing 20 connect to the ground; a power conversion circuit 30 located inside the metal housing 20 and converting voltage; and a filter circuit 40 located between the power conversion circuit 30 and the metal housing 20. The power conversion circuit 30 has a plurality of output terminals and a switching element. The filter circuit 40 includes a first common mode choke coil 41 and a second common mode choke coil 46 connected in series between the plurality of output terminals and the metal housing 20. The first common mode choke coil 41 includes a first coil 42 that is connected to the ground through the metal housing 20, and a second coil 43 and a third coil 44 that are not connected to the ground. The second common mode choke coil 46 includes a fourth coil 47 and a fifth coil 48 that are not connected to the ground.SELECTED DRAWING: Figure 1 【課題】電力変換回路及び金属筐体の間に生じる寄生容量に起因してノイズが発生する。【解決手段】電力変換装置１０は、グランドに接続される金属筐体２０と、金属筐体２０の内部に位置し、電圧を変換する電力変換回路３０と、電力変換回路３０及び金属筐体２０の間に位置するフィルタ回路４０と、を備える。電力変換回路３０は、複数の出力端子と、スイッチング素子と、を有している。フィルタ回路４０は、複数の出力端子と金属筐体２０との間に直列接続される第１コモンモードチョークコイル４１及び第２コモンモードチョークコイル４６を備える。第１コモンモードチョークコイル４１は、金属筐体２０を通してグランドに接続する第１コイル４２と、グランドに接続されない第２コイル４３及び第３コイル４４と、を含んでいる。第２コモンモードチョークコイル４６は、グランドに接続されない第４コイル４７及び第５コイル４８と、を含んでいる。【選択図】図１