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    • 79. 发明公开
    • SWITCH DRIVING CIRCUIT, INVERTER APPARATUS AND POWER STEERING APPARATUS
    • SCHALTERTREIBERSCHALTUNG,WECHSELRICHTER UND SERVOLENKUNGSVORRICHTUNG
    • EP2755314A1
    • 2014-07-16
    • EP12830399.7
    • 2012-08-10
    • Kabushiki Kaisha ToshibaNSK Ltd.
    • MAEKAWA, SariFUKINUKI, ShigeruKUMAGAI, Shin
    • H02M7/48
    • H01L29/00H02J7/0034H02M7/48H02M7/53871H02P27/06H02P29/027Y10T307/76
    • A switch driving circuit electrically opens and closes a switch circuit (5) including two N-channel type semiconductor switching elements (6a, 6b) series connected in opposite directions, thereby electrically opening and closing an electrical path between a DC power supply (4) and an inverter circuit (1). The switch driving circuit (38) has a reference potential point in common with the inverter circuit (1) and supplies an opening/closing control signal to the switch circuit (5). The switch driving circuit (38) includes a half bridge circuit including two semiconductor switching elements (10, 11) series connected between a driving power supply and the reference potential point. Two protection diodes (13, 14) are connected in parallel to the semiconductor switching elements (10, 11) respectively. At least one current blocking diode (39, 42, 43) is configured to block current from flowing from the reference potential point through the diode (39, 42, 43) to the switch circuit (5) side when the DC power supply (4) is connected to the inverter circuit (1) in reverse polarity.
    • 开关驱动电路使开关电路(5)电开并闭合,所述开关电路(5)包括以相反方向连接的两个N沟道型半导体开关元件(6a,6b),从而电连接DC电源(4) 和逆变器电路(1)。 开关驱动电路(38)具有与逆变器电路(1)共同的基准电位点,并向开关电路(5)供给开闭控制信号。 开关驱动电路(38)包括半桥电路,其包括串联连接在驱动电源和参考电位点之间的两个半导体开关元件(10,11)。 两个保护二极管(13,14)分别与半导体开关元件(10,11)并联连接。 至少一个电流阻塞二极管(39,42,43)被配置为当直流电源(4)(4)处于阻抗电流时,阻止电流从基准电位点流过二极管(39,42,43)到开关电路 )以相反极性连接到逆变器电路(1)。