POWER CONVERSION DEVICE

PROBLEM TO BE SOLVED: To provide a power conversion device in which a capacitor charge circuit is formed from a little components and which is adaptable to hot swap that enables, while an inverter and a converter of at least one power conversion unit are operated, a capacitor of at least another pow...

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Bibliographic Details
Main Authors HATTORI YUKIO, KAMITSUMA HIROSHI, MIMA AKIRA, SHIRAKAWA SHINJI
Format Patent
LanguageEnglish
Japanese
Published 22.12.2016
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
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Summary:PROBLEM TO BE SOLVED: To provide a power conversion device in which a capacitor charge circuit is formed from a little components and which is adaptable to hot swap that enables, while an inverter and a converter of at least one power conversion unit are operated, a capacitor of at least another power conversion unit to be charged and connected.SOLUTION: The power conversion device comprises a plurality of power conversion units each formed from a converter, an inverter and a chopper. The power conversion device comprises: a first circuit breaker that is provided between a chopper circuit input terminal that is built in a first power conversion unit among the plurality of power conversion units, and a DC reactor that is connected to a DC power source; and a second circuit breaker for connecting a positive electrode terminal of another second power conversion unit that is different from the first power conversion unit, the DC power source and the DC reactor. When connecting the second power conversion unit in parallel while the first power conversion unit is operated, by closing the first circuit breaker and the second circuit breaker, the chopper circuit input terminal and the positive electrode terminal are connected via the reactor.SELECTED DRAWING: Figure 5 【課題】本発明は、少ない部品数でコンデンサ充電回路を構成し、少なくとも一つの電力変換ユニットのインバータ、コンバータが稼働中の状態で、他の少なくとも一つの電力変換ユニットのコンデンサを充電、接続可能とするホットスワップに対応した電力変換装置を提供することを目的とする。【解決手段】コンバータ、インバータ、チョッパからなる電力変換ユニットを複数有する電力変換装置であって、複数の電力変換ユニットのうち一の第一の電力変換ユニットに内蔵されたチョッパ回路入力端子と直流電源に接続される直流リアクトルとの間に設けられる第一開閉器と、第一の電力変換ユニットとは異なる他の第二の電力変換ユニットの正極端子と直流電源および前記直流リアクトルの間とを接続するための第二開閉器と、を有し、第一の電力変換ユニットが稼働中に第二の電力変換ユニットを並列接続する場合に、第一開閉器および第二開閉器を閉じることにより、チョッパ回路入力端子および前記正極端子が前記リアクトルを介して接続される【選択図】 図５
Bibliography:Application Number: JP20150104117