POWER BUFFER DEVICE

• Main Authors: TAWARAGI TAKAYOSHI, ISHII TAKAAKI, NISHIKAWA TAKEO, KAMATANI YUKI, CHEN CHEN
• Format: Patent
• Language: English; Japanese
• Published: 17.10.2019
• 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 provide a technology that can reduce the size of a capacitor in a power buffer device.SOLUTION: An active buffer circuit 8 controls such that, for a passive capacitor Cp and an active capacitor Ca connected in series to a DC link 6 of a power conditioner, the voltage of the active capacitor Ca becomes a voltage in which the voltage of the active capacitor Ca carries a DC bias component of the voltage of the passive capacitor Cp in addition to a voltage in which increase and decrease are reversed with respect to the voltage of the passive capacitor Cp.SELECTED DRAWING: Figure 2 【課題】電力バッファ装置において、コンデンサのサイズを低減することが可能な技術を提供する。【解決手段】アクティブバッファ回路８は、パワーコンディショナの直流リンク６に直列に接続されたパッシブコンデンサＣｐとアクティブコンデンサＣａに対して、アクティブコンデンサＣａの電圧が、パッシブコンデンサＣｐの電圧と増減を反転させた電圧に加えて、アクティブコンデンサＣａの電圧がパッシブコンデンサＣｐの電圧のＤＣバイアス成分を担う電圧となるように制御する。【選択図】図２