DC POWER SUPPLY AND AIR CONDITIONER EMPLOYING THE SAME

• Main Authors: UEDA KAZUHIRO, TAMURA KENJI, FUNAYAMA YUJI, SUGAWARA EIJI, TSUKII KOJI, TAMURA MASAHIRO
• Format: Patent
• Language: English; Japanese
• Published: 24.11.2015
• 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

PROBLEM TO BE SOLVED: To provide a high-efficiency DC power supply by reducing a circuit loss caused by a hysteresis loss that occurs in an AC reactor.SOLUTION: The DC power supply includes a converter circuit 100 for converting AC power to DC power. The converter circuit 100 includes: a diode bridge (D1-D4) formed from a plurality of diodes D1-D4; a plurality of switching elements Q1-Q6; and a first AC reactor L1 and a second AC reactor L2 at a high side or a low side of the converter circuit 100. Power factor control is performed while circulation directions of currents circulating to the first AC reactor L1 and the second AC reactor L2 are limited to one direction by the plurality of switching elements Q5 and Q6. 【課題】交流リアクトルで発生するヒステリシス損失による回路損失を低減し、高効率な直流電源装置を提供する。【解決手段】交流電力を直流電力に変換するコンバータ回路１００を有する直流電源装置であって、前記コンバータ回路１００に、複数のダイオードＤ１〜Ｄ４からなるダイオードブリッジ（Ｄ１〜Ｄ４）と、複数のスイッチング素子Ｑ１〜Ｑ６と、前記コンバータ回路１００のハイサイドまたはローサイドのどちらか一方に第１の交流リアクトルＬ１と第２の交流リアクトルＬ２と、を備え、前記複数のスイッチング素子Ｑ５、Ｑ６によって、前記第１の交流リアクトルＬ１と第２の交流リアクトルＬ２のそれぞれに通流する電流の通流方向を一方向に制限しながら、力率改善制御を行う。【選択図】図１