ELECTRIC POWER CONVERSION SYSTEM AND AIR CONDITIONER

• Main Authors: TAMURA KENJI, SUGAWARA EIJI, HASHIMOTO HIROYUKI, TSUKII KOJI
• Format: Patent
• Language: English; Japanese
• Published: 26.04.2018
• Subjects: AIR-CONDITIONING, AIR-HUMIDIFICATION, VENTILATION, USE OF AIRCURRENTS FOR SCREENING; 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; BLASTING; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; HEATING; LIGHTING; MECHANICAL ENGINEERING; RANGES; VENTILATING; WEAPONS

PROBLEM TO BE SOLVED: To provide an electric power conversion system capable of preventing destruction of an element even at a low cost.SOLUTION: The electric power conversion system includes: a first drive circuit (IC1) which drives first and second switching elements (Q1, Q2), detects the presence/absence of an overcurrent in an electric current running through a bridge circuit and has an output terminal (a Fault terminal) outputting a predetermined voltage signal (0 V) when an overcurrent current is detected; a second drive circuit (IC2) which drives third and fourth switching elements (Q3, Q4); and a transmission elements (D5, D6) which is connected between the output terminal (Fault terminal) of the first drive circuit (IC1) and input terminals (LIN, HIN) of the second drive circuit (IC2) and transmits a voltage signal (0 V) to the input terminals (LIN, HIN).SELECTED DRAWING: Figure 2 【課題】安価でありながら素子の破壊を防止できる電力変換装置を提供する。【解決手段】第１および第２スイッチング素子（Ｑ１，Ｑ２）を駆動するとともに、ブリッジ回路に流れる電流における過電流の有無を検出し、過電流を検出した場合に所定の電圧信号（０Ｖ）を出力する出力端子（Ｆａｕｌｔ端子）を有する第１の駆動回路（ＩＣ１）と、第３および第４スイッチング素子（Ｑ３，Ｑ４）を駆動する第２の駆動回路（ＩＣ２）と、第１の駆動回路（ＩＣ１）の出力端子（Ｆａｕｌｔ端子）と、第２の駆動回路（ＩＣ２）の入力端子（ＬＩＮ，ＨＩＮ）との間に接続され、電圧信号（０Ｖ）を入力端子（ＬＩＮ，ＨＩＮ）に伝達する伝達素子（Ｄ５，Ｄ６）と、を設けた。【選択図】図２