公开(公告)号：US6034513A

公开(公告)日：2000-03-07

申请号：US832429

申请日：1997-04-02

申请人： Richard William Farrington ,  Mark Elliott Jacobs ,  Hengchun Mao

发明人： Richard William Farrington ,  Mark Elliott Jacobs ,  Hengchun Mao

IPC分类号： H02M1/00 ,  H02M1/42 ,  G05F1/70 ,  G05F1/614

CPC分类号： H02M1/4225 ,  Y02B70/126

摘要： A power factor controller, a method of controlling power factor and a power converter employing either the controller or the method. The controller includes: (1) a ramp circuit that senses an output voltage of a converter being controlled and generates an intermediate waveform that rises as a function of a magnitude of the output voltage and (2) a drive circuit, coupled to the ramp circuit, that senses a current in the converter and causes the intermediate waveform to fall at a time that is a function of a magnitude of the current, the drive circuit generating a drive signal for the converter from the intermediate waveform.

摘要翻译： 功率因数控制器，功率因数控制方法以及使用控制器或方法的功率转换器。 控制器包括：（1）斜坡电路，其检测被控制的转换器的输出电压，并产生作为输出电压的大小的函数上升的中间波形;以及（2）耦合到斜坡电路的驱动电路 ，其感测转换器中的电流，并且使得中间波形在与电流大小的函数的时间下降，驱动电路从中间波形产生用于转换器的驱动信号。

公开(公告)号：US5986904A

公开(公告)日：1999-11-16

申请号：US186539

申请日：1998-11-05

申请人： Mark Elliott Jacobs ,  Hengchun Mao

发明人： Mark Elliott Jacobs ,  Hengchun Mao

IPC分类号： H02M1/34 ,  H02M3/335 ,  H02M7/06

CPC分类号： H02M1/34 ,  H02M3/33569 ,  H02M2001/342 ,  Y02B70/1491

摘要： A lossless snubber circuit is described for use with power converters, particularly asymmetric half-bridge converters. The snubber circuit provides a clamping circuit which has a clamping diode and a clamping capacitor connected across each of the rectifier diodes in the power converters output circuit. The clamping diode and clamping capacitor act to clamp the voltage across the rectifier diode and to recover the reverse recovery energy from the rectifier diode's turn-off. The reverse recovery energy is then transferred back to the input capacitors of the converter's input circuit through an energy recovery circuit. The energy recovery circuit includes a recovery switch which regulates the operation of the snubber circuit and a commutation transformer which provides the path from the snubber circuit to the input circuit. The snubber circuit allows the clamping voltage of the clamping capacitor to be adjusted to accommodate changes in the converter's conditions.

摘要翻译： 描述了与功率转换器，特别是非对称半桥转换器一起使用的无损耗缓冲电路。 缓冲电路提供钳位电路，该钳位电路具有钳位二极管和钳位电容器，其连接在功率转换器输出电路中的每个整流二极管上。 钳位二极管和钳位电容用于钳位整流二极管两端的电压，并恢复整流二极管关断时的反向恢复能量。 然后通过能量回收电路将反向恢复能量转移回转换器输入电路的输入电容器。 能量恢复电路包括调节缓冲电路的操作的恢复开关和提供从缓冲电路到输入电路的路径的换向变压器。 缓冲电路允许调整钳位电容器的钳位电压以适应变换器条件的变化。

公开(公告)号：US20190089197A1

公开(公告)日：2019-03-21

申请号：US16131469

申请日：2018-09-14

申请人： Hengchun Mao ,  Xuezhong Jia

发明人： Hengchun Mao ,  Xuezhong Jia

IPC分类号： H02J50/12 ,  H01F38/14 ,  H02J7/02 ,  H02J7/00 ,  H01F27/36 ,  H01F27/38

摘要： A device has a plurality of coils arranged along a perimeter within the device, where each coil has a winding configured to be coupled to a power converter through a resonant capacitor, and forms a resonator with the resonant capacitor. The device has also a connection core which is magnetically coupled to the plurality of coils. Furthermore, the device has a plurality of power converters, where each power converter is coupled to one of the plurality of coils, and is configured such that a current flowing through the winding of the coil has the same frequency as other winding currents in the device, and the phase angle of the current is approximately equal to the space angle of the coil, so a rotating magnetic field is formed in a space around the device.

公开(公告)号：US09590495B2

公开(公告)日：2017-03-07

申请号：US13219513

申请日：2011-08-26

申请人： Dianbo Fu ,  Hengchun Mao ,  Bing Cai

发明人： Dianbo Fu ,  Hengchun Mao ,  Bing Cai

IPC分类号： G05F5/00 ,  H02M1/42 ,  H02M1/32

CPC分类号： H02M1/4208 ,  H02M1/32 ,  H02M1/4225 ,  H02M5/20 ,  H02M5/293 ,  Y02B70/126

摘要： An embodiment holdup time circuit of a bridgeless power factor correction circuit comprises a charge device, an energy storage apparatus and a discharge device. The charge device comprises a first terminal coupled to a bridgeless power factor correction circuit and a second terminal coupled to the energy storage apparatus. The discharge device comprises a first terminal coupled to the energy storage apparatus and a second terminal coupled to the bridgeless power factor correction circuit.

摘要翻译： 无桥功率因数校正电路的实施例保持时间电路包括充电装置，能量存储装置和放电装置。 充电装置包括耦合到无桥功率因数校正电路的第一端子和耦合到能量存储装置的第二端子。 放电装置包括耦合到能量存储装置的第一端子和耦合到无桥功率因数校正电路的第二端子。

公开(公告)号：US09088215B2

公开(公告)日：2015-07-21

申请号：US13156203

申请日：2011-06-08

申请人： Hengchun Mao ,  Dianbo Fu ,  Bing Cai

发明人： Hengchun Mao ,  Dianbo Fu ,  Bing Cai

IPC分类号： H05K7/00 ,  H02M3/158 ,  H02M3/00

CPC分类号： H02M3/158 ,  H01L21/4828 ,  H01L21/4842 ,  H01L23/49562 ,  H01L23/49575 ,  H01L23/49589 ,  H01L24/81 ,  H01L25/0655 ,  H01L25/0657 ,  H01L25/16 ,  H01L25/50 ,  H01L2225/06513 ,  H01L2225/06517 ,  H01L2924/1205 ,  H01L2924/1206 ,  H01L2924/1207 ,  H01L2924/13091 ,  H01L2924/14252 ,  H01L2924/1426 ,  H02M3/00 ,  H02M3/1588 ,  Y02B70/1466 ,  Y10T29/4913

摘要： An embodiment power converter package comprises a semiconductor die, an output inductor, a plurality of input capacitors and output capacitors. The semiconductor die, the output inductor and the plurality of capacitors are mounted on a lead frame and connected one to another through various pads on the lead frame. The semiconductor die comprises a high side switch, a low side switch and a driver. The power converter package is electrically coupled to an external pulse width modulation controller through a variety of input and output pads.

摘要翻译： 实施例的功率转换器封装包括半导体管芯，输出电感器，多个输入电容器和输出电容器。 半导体管芯，输出电感器和多个电容器安装在引线框架上，并通过引线框架上的各种焊盘彼此连接。 半导体管芯包括高侧开关，低侧开关和驱动器。 功率转换器封装通过各种输入和输出焊盘电耦合到外部脉宽调制控制器。

公开(公告)号：US20140266546A1

公开(公告)日：2014-09-18

申请号：US14187249

申请日：2014-02-22

申请人： Hengchun Mao

发明人： Hengchun Mao

IPC分类号： H01F27/28 ,  H01F41/04

CPC分类号： H01F27/2804 ,  H01F41/046 ,  H01F2027/2819 ,  Y10T29/49073

摘要： A package comprises a substrate with a plurality of metal tracks, a via hole formed in the substrate, wherein the sidewall of the via hole is partially plated and the via hole is filled with a magnetic material, and a first winding magnetically coupled to the via hole.

摘要翻译： 封装包括具有多个金属轨道的基板，形成在基板中的通孔，其中通孔的侧壁被部分地电镀，并且通孔填充有磁性材料，第一绕组磁耦合到通孔 孔。

公开(公告)号：US20130033786A1

公开(公告)日：2013-02-07

申请号：US13198178

申请日：2011-08-04

申请人： Hengchun Mao ,  Yan-Fei Liu ,  Renhua Wu

发明人： Hengchun Mao ,  Yan-Fei Liu ,  Renhua Wu

IPC分类号： H02H7/00

CPC分类号： H02M3/158 ,  H01R43/26 ,  H02H3/003 ,  H02H9/02 ,  H02H9/025 ,  H02M1/32 ,  H02M3/1582 ,  Y10T29/49117

摘要： An embodiment high efficiency power regulator comprises a three-terminal converter and a protection device. The three-terminal converter comprises a first terminal coupled to a positive terminal of an input voltage bus, a second terminal coupled to a positive terminal of an output voltage bus and a third terminal coupled to the protection device. The protection device comprises an inrush current limiting element connected in series with a reverse polarity protection device.

摘要翻译： 一个实施例的高效率功率调节器包括三端转换器和保护装置。 三端转换器包括耦合到输入电压总线的正端子的第一端子，耦合到输出电压总线的正端子的第二端子和耦合到保护装置的第三端子。 保护装置包括与反极性保护装置串联连接的浪涌电流限制元件。

公开(公告)号：US20120049819A1

公开(公告)日：2012-03-01

申请号：US12973521

申请日：2010-12-20

申请人： Hengchun Mao ,  Dianbo Fu ,  Bing Cai

发明人： Hengchun Mao ,  Dianbo Fu ,  Bing Cai

IPC分类号： G05F1/00

CPC分类号： H02M3/1582 ,  H02J1/102

摘要： A power system comprising a non-isolated voltage regulator configured to couple to an input voltage and produce an output voltage, wherein the non-isolated voltage regulator is in a power distribution system and configured to boost the input voltage when the input voltage is less than a minimum output voltage, to reduce the input voltage when the input voltage is greater than a maximum output voltage, and to pass-through the input voltage when the input voltage is greater than or equal to the minimum output voltage and less than or equal to the maximum output voltage.

摘要翻译： 一种电力系统，包括被配置为耦合到输入电压并产生输出电压的非隔离电压调节器，其中所述非隔离电压调节器在配电系统中并且被配置为当所述输入电压小于 最小输出电压，以在输入电压大于最大输出电压时降低输入电压，并且当输入电压大于或等于最小输出电压并且小于或等于 最大输出电压。

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。