公开(公告)号：US06674658B2

公开(公告)日：2004-01-06

申请号：US10062639

申请日：2002-02-01

申请人： Hengchun Mao ,  Yimin Jiang

发明人： Hengchun Mao ,  Yimin Jiang

IPC分类号： H02M3335

CPC分类号： H02M3/33592 ,  Y02B70/1475

摘要： A power converter device using synchronous rectifiers and method for controlling operation thereof are provided. A first synchronous rectifier is coupled to the secondary transformer winding to pass a voltage induced at the secondary winding in response to an input voltage supplied to the primary transformer winding during an on-state of a main power switch. A first drive circuit is coupled to the gate terminal of the first synchronous rectifier to selectively activate and deactivate the first rectifier in correspondence with the respective on and off states of the main power switch based on a gate voltage supplied by the first drive circuit, with at least one circuit parameter being selected in the first drive circuit for maintaining the gate voltage within a predefined range regardless of variation in the level of the input voltage.

摘要翻译： 提供了一种使用同步整流器的电力转换装置及其控制方法。 第一同步整流器耦合到次级变压器绕组，以响应于在主电源开关的导通状态期间提供给初级变压器绕组的输入电压，传递在次级绕组处感应的电压。 第一驱动电路耦合到第一同步整流器的栅极端子，以基于由第一驱动电路提供的栅极电压与主电源开关的各自的导通和关断状态对应地选择性地激活和去激活第一整流器， 在第一驱动电路中选择至少一个电路参数，用于将栅极电压维持在预定范围内，而与输入电压电平的变化无关。

公开(公告)号：US06574124B2

公开(公告)日：2003-06-03

申请号：US10242558

申请日：2002-09-11

申请人： Feng Lin ,  Ning Sun ,  Hengchun Mao ,  Yimin Jiang

发明人： Feng Lin ,  Ning Sun ,  Hengchun Mao ,  Yimin Jiang

IPC分类号： H02M3335

CPC分类号： H02M3/1584 ,  H02M1/32 ,  H02M3/285 ,  H02M3/33569 ,  H02M3/33592 ,  Y02B70/1475

摘要： A power distribution system is provided including current sharing circuitry, current sensing and over-current protection. The system includes a plurality of power converter modules each having a current sharing signal terminal on an input side and power output terminals on an output side, the corresponding power output terminals of the several modules being connected together and adapted to power a common load; an interconnecting signal bus coupled across the current sharing signal terminals on the input side; a plurality of feedback circuits, each of which is associated with one of said modules, each feedback circuit including a comparator (error amplifier) for comparing a feedback voltage on the output side with a reference voltage to provide an error signal to the input side; the error signal conditioned to provide a current command signal to said signal bus, wherein the signal bus provides a common current command signal to drive the power converter modules.

摘要翻译： 提供了配电系统，包括电流共享电路，电流检测和过电流保护。 该系统包括多个功率转换器模块，每个功率转换器模块在输入侧具有电流共享信号端子和输出侧的功率输出端子，多个模块的相应功率输出端子连接在一起并适于为公共负载供电; 耦合在输入侧的电流共享信号端子上的互连信号总线; 多个反馈电路，每个反馈电路与所述模块中的一个相关联，每个反馈电路包括用于将输出侧的反馈电压与参考电压进行比较的比较器（误差放大器），以向输入侧提供误差信号; 所述误差信号被调节以向所述信号总线提供电流指令信号，其中所述信号总线提供公共电流指令信号以驱动所述功率转换器模块。

公开(公告)号：US5933336A

公开(公告)日：1999-08-03

申请号：US118549

申请日：1998-07-17

申请人： Yimin Jiang ,  Hengchun Mao

发明人： Yimin Jiang ,  Hengchun Mao

IPC分类号： H02M1/00 ,  H02M1/42 ,  H02M3/158 ,  H02M1/12

CPC分类号： H02M1/4216 ,  H02M3/158 ,  Y02B70/126 ,  Y02B70/1425

摘要： A boost converter having multiple L-C branches and a method of operating the same. The boost converter includes first, second and third phase inputs and an output. In one embodiment, the boost converter includes first and second switches coupled between corresponding rails of the output. The boost converter also includes first, second and third capacitors that form first, second and third L-C series branches, respectively, with a first inductor. The first, second and third L-C series branches are coupled between the first, second and third phase inputs, respectively, and a node between the first and second switches. The first and second switches cooperate progressively to employ a voltage across the rails less a voltage across the first, second and third capacitors to discharge currents through the first inductor and thereby reduce input current total harmonic distortion (THD) on all three of the phase inputs.

摘要翻译： 具有多个L-C分支的升压转换器及其操作方法。 升压转换器包括第一，第二和第三相输入端和输出端。 在一个实施例中，升压转换器包括耦合在输出的相应导轨之间的第一和第二开关。 升压转换器还包括分别与第一电感器形成第一，第二和第三L-C串联支路的第一，第二和第三电容器。 第一，第二和第三L-C系列分支分别耦合在第一，第二和第三相输入之间，以及第一和第二开关之间的节点。 第一和第二开关逐渐协调以跨越轨道使电压减去第一，第二和第三电容器两端的电压，以放电通过第一电感器的电流，从而降低所有三相相位输入端的输入电流总谐波失真（THD） 。

公开(公告)号：US06760235B2

公开(公告)日：2004-07-06

申请号：US10241336

申请日：2002-09-11

申请人： Feng Lin ,  Ning Sun ,  Hengchun Mao ,  Yimin Jiang

发明人： Feng Lin ,  Ning Sun ,  Hengchun Mao ,  Yimin Jiang

IPC分类号： H02M3335

CPC分类号： H02M1/36 ,  H02M3/33592 ,  Y02B70/1475

摘要： Circuit and method for controlling circuitry in a power converter device during a soft-start process is provided. Synchronous rectifier control circuitry is adapted to gradually apply a gate drive signal derived from the main switch of the power converter device to a freewheeling synchronous rectifier of the switching circuitry during the soft-start process. The control circuitry gradually releases the amplitude or the pulse-width of the gate drive signal to the freewheeling synchronous rectifier to avoid a large duty ratio in the synchronous rectifier during start-up so that a negative current does not build up in the output inductor.

摘要翻译： 提供了在软启动过程中控制功率转换器装置中的电路的电路和方法。 同步整流器控制电路适于在软启动过程中逐渐将从功率转换器装置的主开关导出的栅极驱动信号施加到开关电路的续流同步整流器。 控制电路逐渐将栅极驱动信号的幅度或脉冲宽度释放到续流同步整流器，以避免启动期间同步整流器中的大占空比，从而在输出电感器中不产生负电流。

公开(公告)号：US06320764B1

公开(公告)日：2001-11-20

申请号：US09539690

申请日：2000-03-31

申请人： Yimin Jiang ,  Hengchun Mao

发明人： Yimin Jiang ,  Hengchun Mao

IPC分类号： H02M3335

CPC分类号： H02M3/33576 ,  H02M3/33523

摘要： A regulation circuit for a voltage-fed power converter, a method of operation thereof and a power converter employing the circuit or the method. The power converter has an inverter switch adapted to transfer power to a transformer. In one embodiment, the regulation circuit includes a switching network coupled to a tapped winding of the transformer. The switching network is operable to vary a turns ratio of the transformer, thereby regulating an output voltage of the power converter.

摘要翻译： 用于电压馈送功率转换器的调节电路，其操作方法和采用该电路或方法的功率转换器。 功率转换器具有适于将功率传递到变压器的逆变器开关。 在一个实施例中，调节电路包括耦合到变压器的抽头绕组的开关网络。 交换网络可操作地改变变压器的匝数比，从而调节功率转换器的输出电压。

公开(公告)号：US6026006A

公开(公告)日：2000-02-15

申请号：US157757

申请日：1998-09-21

申请人： Yimin Jiang ,  Hengchun Mao

发明人： Yimin Jiang ,  Hengchun Mao

IPC分类号： H02M1/00 ,  H02M1/42 ,  H02M7/5387 ,  H02M3/335

CPC分类号： H02M1/4216 ,  H02M1/4258 ,  Y02B70/126

摘要： An integrated three-phase power converter and method of operation thereof is provided. The integrated three-phase power converter includes: (1) first and second power switches coupled between corresponding rails of said power converter, (2) an input stage, including first, second and third L-C branches coupled between said first, second and third phase inputs and a node between said first and second power switches, adapted to receive phase voltages from a source of electrical power, and (3) an output stage, coupled to said first and second power switches, that provides a DC output voltage at said output, said first and second power switches cooperating to employ said input stage to reduce input current total harmonic distortion (THD) on all three of said phase inputs and said output stage to convert said phase voltages to said DC output voltage.

摘要翻译： 提供一种集成的三相电力转换器及其操作方法。 集成的三相功率转换器包括：（1）耦合在所述功率转换器的相应导轨之间的第一和第二功率开关，（2）输入级，包括耦合在所述第一，第二和第三相之间的第一，第二和第三LC分支 输入和所述第一和第二功率开关之间的节点，适于从电源接收相电压;以及（3）耦合到所述第一和第二功率开关的输出级，其在所述输出端提供DC输出电压 所述第一和第二功率开关协同采用所述输入级以减少所有三相所述相位输入端和所述输出级上的输入电流总谐波失真（THD），以将所述相电压转换成所述直流输出电压。

公开(公告)号：US6002241A

公开(公告)日：1999-12-14

申请号：US183076

申请日：1998-10-30

申请人： Mark E. Jacobs ,  Yimin Jiang ,  Hengchun Mao

发明人： Mark E. Jacobs ,  Yimin Jiang ,  Hengchun Mao

IPC分类号： H02M3/158 ,  G05F1/613

CPC分类号： H02M3/158 ,  Y10T307/505

摘要： A split-boost converter having a main inductor, first and second main switches and floating and fixed outputs and a method of operating the same. In one embodiment, the converter includes an auxiliary diode coupled between the main inductor and a first rail of the floating output, and an auxiliary switch coupled to a node between the main inductor and the auxiliary diode and a second rail of the floating output. The converter is operable in a first mode, when an input voltage of the converter at least equals an output voltage of the converter, in which the auxiliary switch remains open and the first and second main switches are modulated to operate the converter. The converter is further operable in a second mode, when an input voltage of the converter is less than an output voltage of the converter, in which the first and second main switches remain closed and the auxiliary switch is modulated to operate the converter.

摘要翻译： 具有主电感器，第一和第二主开关以及浮动和固定输出的分压升压转换器及其操作方法。 在一个实施例中，转换器包括耦合在主电感器和浮动输出的第一导轨之间的辅助二极管以及耦合到主电感器和辅助二极管之间的节点的辅助开关和浮动输出的第二导轨。 当转换器的输入电压至少等于转换器的输出电压，其中辅助开关保持断开并且第一和第二主开关被调制以操作转换器时，转换器可在第一模式下操作。 当转换器的输入电压小于转换器的输出电压时，转换器进一步可操作，其中第一和第二主开关保持闭合，辅助开关被调制以操作转换器。

公开(公告)号：US5946203A

公开(公告)日：1999-08-31

申请号：US118261

申请日：1998-07-17

申请人： Yimin Jiang ,  Hengchun Mao

发明人： Yimin Jiang ,  Hengchun Mao

IPC分类号： H02M1/00 ,  H02M1/42 ,  H02M1/14

CPC分类号： H02M1/4216 ,  Y02B70/126

摘要： For use with a boost converter having first, second and third input inductors, a switching network, method of reducing input current total harmonic distortion (THD) associated with the boost converter, and boost converter employing the switching network and method. In one embodiment, the switching network includes a first switch coupled between corresponding rails of the boost converter. The switching network also includes first, second and third L-C resonant networks wye-coupled to a common node and coupled to the first, second and third input inductors, respectively. The first switch and the first, second and third L-C resonant networks cooperate to create resonant voltages across, and induce phase currents through, the first, second and third input inductors to reduce input current THD associated with the boost converter.

摘要翻译： 用于具有第一，第二和第三输入电感器的升压转换器，开关网络，降低与升压转换器相关联的输入电流总谐波失真（THD）的方法，以及采用开关网络和方法的升压转换器。 在一个实施例中，开关网络包括耦合在升压转换器的相应导轨之间的第一开关。 开关网络还包括分别耦合到公共节点并耦合到第一，第二和第三输入电感器的第一，第二和第三L-C谐振网络。 第一开关和第一，第二和第三L-C谐振网络协作以产生跨越第一，第二和第三输入电感器的谐振电压并且引起相电流，以减小与升压转换器相关联的输入电流THD。

公开(公告)号：US06317336B1

公开(公告)日：2001-11-13

申请号：US09540957

申请日：2000-03-31

申请人： Yimin Jiang ,  Hengchun Mao

发明人： Yimin Jiang ,  Hengchun Mao

IPC分类号： H02M3335

CPC分类号： H02M3/33576 ,  H02M3/33569 ,  H02M3/3372

摘要： A regulation circuit for a current-fed power converter having a power switch adapted to transfer power to a transformer. In one embodiment, the regulation circuit includes a switching network coupled to a tapped winding of the transformer and operable to vary a turns ratio of the transformer thereby regulating an output voltage of the power converter.

摘要翻译： 一种用于电流馈电功率转换器的调节电路，具有适于将功率传递到变压器的电源开关。 在一个实施例中，调节电路包括耦合到变压器的抽头绕组的开关网络，并且可操作以改变变压器的匝数比，从而调节功率转换器的输出电压。

公开(公告)号：US6046915A

公开(公告)日：2000-04-04

申请号：US118569

申请日：1998-07-17

申请人： Mark E. Jacobs ,  Yimin Jiang ,  Hengchun Mao

发明人： Mark E. Jacobs ,  Yimin Jiang ,  Hengchun Mao

IPC分类号： H02M1/00 ,  H02M1/42 ,  H02M3/158 ,  H02M1/12 ,  G05F1/00

CPC分类号： H02M3/158 ,  H02M1/4216 ,  Y02B70/126

摘要： An active circuit for delivering three phase AC input power received from a three phase rectifier to a boost converter and a method of operating the same. In one embodiment, the active circuit includes a phase selection switching circuit, coupled to the rectifier, that selects an inner phase of the three phase AC input power. The active circuit also includes a switching network, coupled to the phase selection switching circuit and the rectifier, that controls a current waveshape of the inner phase and a current waveshape of at least one other phase, thereby to reduce harmonics associated with three phase AC input current.

摘要翻译： 用于将从三相整流器接收的三相交流输入电力输送到升压转换器的有源电路及其操作方法。 在一个实施例中，有源电路包括耦合到整流器的相选择开关电路，其选择三相AC输入功率的内相。 有源电路还包括耦合到相选择开关电路和整流器的开关网络，其控制内相的电流波形和至少一个其它相的电流波形，从而减少与三相AC输入相关联的谐波 当前。