Invention Grant
- Patent Title: Snubber apparatus and power conversion apparatus
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Application No.: US17456575Application Date: 2021-11-25
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Publication No.: US11632038B2Publication Date: 2023-04-18
- Inventor: Qichen Wang , Ryuji Yamada
- Applicant: FUJI ELECTRIC CO., LTD.
- Applicant Address: JP Kawasaki
- Assignee: FUJI ELECTRIC CO., LTD.
- Current Assignee: FUJI ELECTRIC CO., LTD.
- Current Assignee Address: JP Kawasaki
- Priority: JPJP2021-004218 20210114
- Main IPC: H02M1/34
- IPC: H02M1/34 ; H02M7/00

Abstract:
A snubber apparatus includes N parallel charge paths, each of which has a positive-side capacitor, a first diode, and a negative-side capacitor sequentially connected in series between a positive-side terminal and a negative-side terminal, and that allows current to flow from the positive-side terminal's side to the negative-side terminal's side. The snubber apparatus includes N+1 parallel discharge paths, each of which has a second diode connected between the negative-side terminal or the negative-side capacitor in the k-th charge path of the N charge paths, and the positive-side capacitor in the (k+1)-th charge path of the N charge paths or the positive-side terminal, and that allows current to flow from the negative-side terminal's side to the positive-side terminal's side via at least one of the negative-side capacitor and the positive-side capacitor. At least one of the charge paths has a plurality of sections that are turned and adjacent to each other.
Public/Granted literature
- US20220224221A1 SNUBBER APPARATUS AND POWER CONVERSION APPARATUS Public/Granted day:2022-07-14
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