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    • 87. 发明授权
    • Gate drive circuit
    • 门驱动电路
    • US09484908B1
    • 2016-11-01
    • US14744998
    • 2015-06-19
    • HELLA CORPORATE CENTER USA, INC.
    • Juncheng LuHua Bai
    • H03K3/00H03K17/13H03K17/687
    • H03K17/133H03K17/122H03K17/164H03K17/284H03K17/6871
    • A driver circuit has a gate drive terminal that produces a gate drive signal to control paralleled power semiconductor switches, such as GaN high electron mobility transistor (HEMT) devices. One of the switches is closest to the gate drive terminal such that its gate drive loop inductance is smaller than the remaining switches that are farther away having a larger loop inductance. An additional resistor or gate-source capacitor is provided in the gate drive circuit of the closest switch which increases the total gate resistance of the closest switch compared to the remaining switches, which delays the turn off time of the closest switch. The delay permits zero voltage switching turn-off of the remaining switches to reduce noise. The closest switch is hard switched off but has the smallest loop inductance, which allows optimized turn off.
    • 驱动器电路具有栅极驱动端子,其产生栅极驱动信号以控制并联的功率半导体开关,例如GaN高电子迁移率晶体管(HEMT)器件。 其中一个开关最靠近栅极驱动端子,使得其栅极驱动环路电感小于离开更大环路电感的剩余开关。 在最接近的开关的栅极驱动电路中提供了附加的电阻器或栅极 - 源极电容器,这增加了与其余开关相比最近的开关的总栅极电阻,这延迟了最接近的开关的关断时间。 延迟允许剩余开关的零电压开关关断以降低噪声。 最接近的开关被硬关闭,但是具有最小的环路电感,这允许优化的关断。
    • 88. 发明申请
    • VOLTAGE REGULATION SYSTEM AND METHOD
    • 电压调节系统及方法
    • US20160269019A1
    • 2016-09-15
    • US14644655
    • 2015-03-11
    • Legend Power Systems Inc.
    • Mark PetersenJonathan Stewart Thomson
    • H03K17/13
    • H03K17/13G05F1/14H02M5/10H02M5/12H02M5/18
    • Various embodiments are described herein for methods and systems of regulating incoming voltage supplied from a utility power supply to a load. In one example embodiment, a voltage regulator adapted to be electrically interposed between the utility power supply and the load, each having at least one phase, is provided. The voltage regulator comprises an autotransformer having, for each phase, a series winding and a regulating winding, where the regulating winding has a plurality of taps and the series winding has a load side for connection to the load and a supply side for connection to the utility power supply. The voltage regulator comprises a controller coupled to the autotransformer, where the controller is configured to operate the voltage regulator in a zero voltage reduction mode and an autotransformer mode, and where the controller comprises a zero voltage reduction mode switch connected across a first subset of at least two taps of each regulating winding and a normally closed contactor connected across a second subset of at least two taps of each regulating winding.
    • 本文描述了用于调节从公用电力供应到负载的进入电压的方法和系统的各种实施例。 在一个示例性实施例中,提供了适于电连接在公用电源和负载之间的电压调节器,每个具有至少一个相位。 电压调节器包括自耦变压器,对于每个相,具有串联绕组和调节绕组,其中调节绕组具有多个抽头,并且串联绕组具有用于连接到负载的负载侧和用于连接到负载侧的供电侧 公用电源。 电压调节器包括耦合到自耦变压器的控制器,其中控制器被配置为在零电压降低模式和自耦变压器模式下操作电压调节器,并且其中控制器包括连接在第一子集上的零电压降低模式开关 每个调节绕组的至少两个抽头和连接在每个调节绕组的至少两个抽头的第二子集上的常闭接触器。