POWER CONVERSION DEVICE

• Main Authors: SHIGETA SATORU, IKEDA SHINTARO
• Format: Patent
• Language: English; Japanese
• Published: 31.07.2023
• 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 power conversion device that continues a safe state by reliably operating a switching element.SOLUTION: A power conversion device 100 includes an inverter circuit 107 that is composed of an upper arm switching element and a lower arm switching element to convert DC power supplied from a DC power supply 200 into AC power, and a drive control unit for drivingly controlling an electric motor 400 connected to the inverter circuit 107 by switching the switching element. When a transition command to a safe state is received, an overvoltage is applied to a gate terminal of the switching element, a short-circuit state of the switching element is continued, and the inverter circuit 107 is three-phase short-circuited or the upper and the lower arms are short-circuited.SELECTED DRAWING: Figure 1 【課題】スイッチング素子を確実に動作させて安全状態を継続する電力変換装置を提供する。【解決手段】電力変換装置１００は、上アームのスイッチング素子及び下アームのスイッチング素子より構成され、直流電源２００より供給された直流電力を交流電力に変換するインバータ回路１０７と、スイッチング素子をスイッチング動作させてインバータ回路１０７に接続された電動機４００を駆動制御する駆動制御部と、を備える。安全状態への移行指令を受けた場合に、スイッチング素子のゲート端子に過電圧を印加して、スイッチング素子の短絡状態を継続し、インバータ回路１０７を３相短絡又は上下アーム短絡させる。【選択図】図１