ELECTRIC POWER UNIT, LOAD DRIVE SYSTEM, AND ILLUMINATION SYSTEM

• Main Authors: OGASAWARA KIYOSHI, KIDO SHOJIRO, TSURUOKA SHUNSUKE
• Format: Patent
• Language: English; Japanese
• Published: 09.07.2020
• Subjects: ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY

To simplify circuit structure.SOLUTION: An electric power unit 1 includes multiple DC power supply circuits 10 electrically connected in parallel, and multiple MOSFETs 11, in one-to-one correspondence with the multiple DC power supply circuits 10, and electrically connected in forward direction with the output terminals 101 of corresponding multiple DC power supply circuits 10, respectively. The electric power unit 1 includes multiple drive circuits 12, in one-to-one correspondence with the multiple MOSFETs 11 and turning the multiple MOSFETs 11 ON/OFF, respectively. Each of the multiple DC power supply circuits 10 includes a switching power supply circuit 102 having a transformer T1 for electrically insulating an input terminal 100 and an output terminal 101. The drive circuit 12 operates with a voltage Vn3 induced in the auxiliary winding N3 of the transformer T1, and turns the MOSFET11 ON, when the voltage Vn3 goes above a threshold level. The drive circuit 12 turns the MOSFET11 OFF, when the voltage Vn3 goes below the threshold level.SELECTED DRAWING: Figure 1 【課題】回路構成の簡素化を図る。【解決手段】電源装置１は、電気的に並列接続された複数の直流電源回路１０と、複数の直流電源回路１０と一対一に対応し、対応する複数の直流電源回路１０のそれぞれの出力端子１０１と順方向に電気的に接続された複数のＭＯＳＦＥＴ１１とを備える。電源装置１は、複数のＭＯＳＦＥＴ１１と一対一に対応して複数のＭＯＳＦＥＴ１１のそれぞれをオン・オフする複数の駆動回路１２を備える。複数の直流電源回路１０の各々は、入力端子１００と出力端子１０１を電気的に絶縁するためのトランスＴ１を有するスイッチング電源回路１０２を有する。駆動回路１２は、トランスＴ１の補助巻線Ｎ３に誘起される電圧Ｖｎ３で動作し、電圧Ｖｎ３がしきい値以上のときにＭＯＳＦＥＴ１１をオンする。駆動回路１２は、電圧Ｖｎ３がしきい値未満のときにＭＯＳＦＥＴ１１をオフする。【選択図】 図１