DRIVE CIRCUIT BOARD, POWER UNIT, AND POWER CONVERSION DEVICE

• Main Authors: MATSUMOTO DAISUKE, HATTORI YUKIO, KAMITSUMA HIROSHI, MIMA AKIRA, MABUCHI YUICHI
• Format: Patent
• Language: English; Japanese
• Published: 24.03.2016
• 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; BASIC ELECTRONIC CIRCUITRY; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; PULSE TECHNIQUE

PROBLEM TO BE SOLVED: To provide a drive circuit board provided with a drive circuit of a power semiconductor element suitable for miniaturization, a power unit having the drive circuit board, and a power conversion device including the power unit.SOLUTION: A drive circuit board is provided with a drive circuit having: a primary circuit 41 which is inputted with a pulse train signal supplied from a higher level control circuit; a secondary circuit 42 which converts the pulse train signal supplied from the primary circuit into a gate drive signal of a power semiconductor element, and drives on/off the power semiconductor element in response to the gate drive signal; a feedback circuit for feeding the gate drive signal from the secondary circuit back to the primary circuit; and a detection circuit which is provided on the primary circuit, and detects that a state in which a feedback signal by the feedback circuit does not match the pulse train signal on the primary circuit side continues for at least a fixed period.SELECTED DRAWING: Figure 6 【課題】小型化に適したパワー半導体素子の駆動回路を搭載した駆動回路基板、当該駆動回路基板を有するパワーユニットおよび当該パワーユニットを備える電力変換装置を提供する。【解決手段】駆動回路基板は、上位の制御回路から供給されるパルス列信号を入力とする１次側回路４１と、前記１次側回路から供給される前記パルス列信号をパワー半導体素子のゲート駆動信号とし、当該ゲート駆動信号に基づいて前記パワー半導体素子をオン・オフ駆動する２次側回路４２と、前記ゲート駆動信号を前記２次側回路から前記１次側回路へフィードバックさせるフィードバック回路と、前記１次側回路に設けられ、前記フィードバック回路によるフィードバック信号が前記１次側回路側のパルス列信号と不一致となる状態が一定期間以上継続することを検出する検出回路と、を有する駆動回路を搭載する。【選択図】図６