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85 条记录 (耗时 0.03 秒)

    High gain latching Darlington transistor
    12.
    发明授权
    High gain latching Darlington transistor 失效
    高增益锁相达林顿晶体管

    公开(公告)号：US4295059A

    公开(公告)日：1981-10-13

    申请号：US25383

    申请日：1979-03-30

    申请人： Robert L. Steigerwald

    发明人： Robert L. Steigerwald

    IPC分类号： H01L21/8222 ,  H01L21/331 ,  H01L27/082 ,  H01L29/73 ,  H01L29/74 ,  H01L29/744 ,  H03K17/567 ,  H03K17/73 ,  H03K17/12 ,  H03K17/60 ,  H03K17/72

    CPC分类号： H03K17/73 ,  H03K17/567

    摘要： A high gain latching Darlington transistor comprises a gate turn-off thyristor and a load transistor coupled in Darlington configuration. Circuit means including a diode are coupled to the gate turn-off thyristor and the transistor to provide a low loss path for load transistor current which reverse biases the gate-cathode junction of the thyristor at thyristor turn-off to prevent premature device conduction. The latching Darlington transistor configured in this manner thus operates as a conventional gate turn-off thyristor, capable of being pulsed into and out of conduction, but yet exhibits improved dv/dt capability and increased turn-off gain, typically between 10 and 100 times the turn-off gain of the individual gate turn-off thyristor.

    摘要翻译： 高增益闭锁达林顿晶体管包括栅极截止晶闸管和以达林顿配置耦合的负载晶体管。 包括二极管的电路装置耦合到栅极截止晶闸管和晶体管，以为负载晶体管电流提供低损耗路径，其在晶闸管截止时反向偏置晶闸管的栅极 - 阴极结，以防止器件过早传导。 以这种方式配置的闭锁达林顿晶体管因此可以作为传统的栅极截止晶闸管工作，能够被脉冲输入和导出，但是具有改进的dv / dt能力和增加的关断增益，通常在10到100倍之间 单个门极关断晶闸管的关断增益。

    Efficient base drive circuit for high current transistors
    13.
    发明授权
    Efficient base drive circuit for high current transistors 失效
    高电流晶体管的高效基极驱动电路

    公开(公告)号：US4224535A

    公开(公告)日：1980-09-23

    申请号：US931907

    申请日：1978-08-08

    申请人： James W. A. Wilson ,  Robert L. Steigerwald

    发明人： James W. A. Wilson ,  Robert L. Steigerwald

    IPC分类号： H03K17/00 ,  H03K17/60

    CPC分类号： H03K17/60 ,  H03K2217/0036

    摘要： A high current switching transistor controlling a load in its collector circuit receives from a drive circuit sufficient base current necessary to render the transistor conductive. A low loss inductor and switching means are connected to the base of the transistor such that when switching means are rendered nonconductive, current from the inductor flows into the base of the transistor to render it conductive, thus energizing the load.Regulating means coupled between a source of relatively high DC potential and the inductor together with unidirectional feedback path means provide a continuous current into the inductor such that when regulating means are substantially nonconductive, current is diverted away from the base of the high current transistor and circulates through the unidirectional feedback path and low loss inductor.

    摘要翻译： 控制其集电极电路中的负载的高电流开关晶体管从驱动电路接收足以使晶体管导通所需的基极电流。 低损耗电感器和开关装置连接到晶体管的基极，使得当开关装置变得不导通时，来自电感器的电流流入晶体管的基极以使其导通，从而使负载通电。 耦合在相对较高的DC电位源和电感器与单向反馈路径装置之间的调节装置提供了连续的电流进入电感器，使得当调节装置基本上不导通时，电流被转移离开大电流晶体管的基极并循环 通过单向反馈通路和低损耗电感。

    Square-wave converters with soft voltage transitions for ac power distribution systems
    18.
    发明授权
    Square-wave converters with soft voltage transitions for ac power distribution systems 失效
    交流配电系统具有软电压转换的方波转换器

    公开(公告)号：US5568368A

    公开(公告)日：1996-10-22

    申请号：US595453

    申请日：1996-02-05

    申请人： Robert L. Steigerwald ,  Gerald W. Ludwig

    发明人： Robert L. Steigerwald ,  Gerald W. Ludwig

    IPC分类号： H02J3/38 ,  H02M1/12 ,  H02M3/335 ,  H02M3/337

    CPC分类号： H02J3/38 ,  H02M1/12 ,  H02M3/33561 ,  H02M3/337 ,  Y02B70/1433

    摘要： A converter for an ac power distribution system provides a square-wave voltage of low output impedance to an ac power distribution bus for driving a plurality of loads, each load including a rectifier and an input filter capacitor. Slew-rate limiting capacitors are employed to limit the rate of change of voltage on the ac distribution bus, thereby substantially reducing or eliminating conducted and radiated interference from the power distribution system due to high-frequency components of current which would otherwise flow in parasitic capacitances. In addition, zero-voltage switching is employed to achieve highly efficient converter operation. As other advantages, this converter scheme allows for simplification of converters at the load end of the power distribution system (e.g., to simple rectifiers with post regulators), while producing lower ac line currents, lower current harmonics and higher power factors than those of a sine-wave generation system.

    摘要翻译： 用于交流配电系统的转换器为交流配电总线提供低输出阻抗的方波电压，用于驱动多个负载，每个负载包括整流器和输入滤波电容器。 采用压摆率限制电容器来限制交流配电总线上的电压变化率，从而大大减少或消除由于电流的高频分量导致的配电系统的传导和辐射干扰，否则这些电流将以寄生电容的形式流动 。 此外，采用零电压开关来实现高效率的转换器操作。 作为其他优点，该转换器方案允许在配电系统的负载端（例如，具有后稳压器的简单整流器）上简化转换器，同时产生较低的交流线路电流，较低的电流谐波和更高的功率因数 正弦波发生系统。

    Lossless gate drivers for high-frequency PWM switching cells
    19.
    发明授权
    Lossless gate drivers for high-frequency PWM switching cells 失效
    高频PWM开关单元的无损栅极驱动器

    公开(公告)号：US5514921A

    公开(公告)日：1996-05-07

    申请号：US265868

    申请日：1994-06-27

    申请人： Robert L. Steigerwald

    发明人： Robert L. Steigerwald

    IPC分类号： H02M3/335 ,  H03K17/691 ,  H01H36/00

    CPC分类号： H03K17/691 ,  H02M1/08 ,  H02M3/33584 ,  Y02B70/1433 ,  Y10T307/826

    摘要： A gate driver circuit, including either a full-bridge or a half-bridge configuration of gate drive switching devices, is capable of applying gate drive signals of variable pulse widths in a substantially loss,less manner to power switching devices of a high-frequency resonant switching converter, while providing transformer isolation between the gate drive electronics and the power switching devices.

    摘要翻译： 包括栅极驱动开关器件的全桥或半桥配置的栅极驱动器电路能够以基本上损耗较小的方式施加可变脉冲宽度的栅极驱动信号，以使高频率的开关器件 谐振开关转换器，同时在栅极驱动电子器件和功率开关器件之间提供变压器隔离。