POWER CONVERTER

• Main Author: IWABORI MICHIO
• Format: Patent
• Language: English; Japanese
• Published: 15.01.2015
• 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 reduce the size and weight of a transformer by reducing a voltage being applied between the windings of a secondary winding, adjacent between the phase, inputted to the inverter cell of each output phase, when insulated 2N secondary windings are arranged in one transformer and connected with a plurality of inverter cells, respectively, in a power conversion circuit where a phase series arm is constituted by connecting N AC outputs of 3 phase 3 level inverter cells per phase in series, connecting one ends in common, and outputting K phase from the other end.SOLUTION: A (2N-1)th secondary winding in the secondary winding for L phase is connected with the first AC input of a first cell of any one phase (L phase), a 2N-th secondary winding in the secondary winding for L phase is connected with the second AC input of a first cell of the L phase, the second secondary winding in the winding for (L+1)th phase is connected with the first AC input terminal of a first cell of the (L+1)th phase, and the first secondary winding in the winding for the (L+1)th phase is connected with the second AC input terminal of the first cell. 【課題】３相３レベルインバータセルの交流出力を１相当りＮ台直列接続して相直列アームを構成し、一端を共通接続し、他端を各々Ｋ相の出力とする電力変換回路において、１台の変圧器に絶縁された２次巻線を２Ｎ個配置して、前記複数のインバータセルに各々接続する場合、各出力相のインバータセルに入力される２次巻線の相間で隣接した巻線間に印加される電圧を低減させ、変圧器を小型・軽量化する。【解決手段】いずれか一つの相（Ｌ相）の第１セルの第１の交流入力に前記Ｌ相用の２次巻線の中の第２N-1の２次巻線を、前記Ｌ相の第１セルの第２の交流入力に前記Ｌ相用の２次巻線の中の第２Ｎの２次巻線を、L＋１相の第１セルの第１の交流入力端子にL＋１相用巻線の中の第２の２次巻線を、前記第１セルの第２の交流入力端子に前記L＋１相用巻線の中の第１の２次巻線を、各々接続する。【選択図】図３