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A RECTIFIER BRIDGE CIRCUIT, CORRESPONDING APPARATUS AND METHOD
申请公布号：US2017110970(A1)
申请号：US201615157711
申请日期：2016.05.18
申请公布日期：2017.04.20
发明人：Larosa Roberto;Zoppi Giulio;Gonthier Laurent
分类号：H02M3/335;H02M1/42;H02M1/08
主分类号：H02M3/335
地址：Agrate Brianza IT
摘要：A rectifier bridge circuit includes a first SCR/IGBT switch and a second SCR/IGBT switch coupled to a circuit input to receive an ac input voltage. The first and second SCR/IGBT switches are alternatively switchable to generate a rectified voltage at a circuit output. Control currents coupled to control terminals of the first and second SCR/IGBT switches are power supply sourced from an auxiliary dc source generated by rectifying the ac input voltage. The control currents are generated by current sources coupled between the auxiliary dc source and the control terminals of the first and second SCR/IGBT switches. The current sources are selectively activatable to produce gating currents for switching on and off the first and second SCR/IGBT switches. A controller unit is provided to control the current sources via level shifter circuits. The control implements progressive conduction time of the first and second SCR/IGBT switches so as to provide inrush current limitation.
主权项：1. A rectifier bridge circuit, comprising: a first electronic switch having a control terminal, a second electronic switch having a control terminal, wherein the first and second electronic switches are coupled to a circuit input configured to receive an ac input voltage, said first and second electronic switches being alternatively switchable on and off to provide a rectified voltage at a circuit output, and an auxiliary dc source circuit configured to provide a first control currents to the control terminal of the first electronic switch and provide a second control current to the control terminal of the second electronic switch.