公开(公告)号：US09122287B2

公开(公告)日：2015-09-01

申请号：US13481073

申请日：2012-05-25

申请人： Hengchun Mao ,  Yan-Fei Liu

发明人： Hengchun Mao ,  Yan-Fei Liu

IPC分类号： G05F1/24 ,  G06F1/00 ,  G05F3/02 ,  G06F1/26

CPC分类号： G05F3/02 ,  G06F1/26

摘要： Dual frequency control of first and second pairs of switches of a buck-boost regulator with pass through band is disclosed. In buck and boost modes respectively a first pair of the switches is operated at high frequency and a second pair of the switches is operated at low frequency. In pass through mode, both pairs of switches are operated at low frequency. Dual frequency control and operation of the pairs of switches enables current sharing between positive and negative power leads in buck, boost and pass-through modes.

摘要翻译： 公开了具有通过带的降压 - 升压调节器的第一和第二对开关的双频率控制。 在降压和升压模式下，第一对开关以高频工作，第二对开关以低频工作。 在通过模式下，两对开关都以低频工作。 两对开关的双频率控制和操作可以在降压，升压和直通模式下实现正负电源线之间的电流共享。

公开(公告)号：US20130049709A1

公开(公告)日：2013-02-28

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： G05F1/70

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：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：US06169671A

公开(公告)日：2001-01-02

申请号：US09553939

申请日：2000-04-21

申请人： Hengchun Mao

发明人： Hengchun Mao

IPC分类号： H02H7125

CPC分类号： H02M1/34 ,  H02M1/4225 ,  H02M2001/346 ,  H03K17/08142 ,  H03K17/08146 ,  Y02B70/126 ,  Y02B70/1491

摘要： For use in a power converter having a power switch subject to switching losses and a rectifying diode subject to a reverse recovery condition, a snubber circuit and related method to mitigate adverse effects associated with the switching losses and the reverse recovery condition. In one embodiment, the snubber circuit includes a recovery circuit, having first and second energy storage devices and a snubber diode, coupled to the rectifying diode. The snubber circuit further includes a third energy storage device, coupled across the rectifying diode, configured to cooperate with the recovery circuit to mitigate adverse effects associated with the reverse recovery condition and reduce a rate of change of a voltage across the power switch to reduce the switching losses.

摘要翻译： 对于具有受切换损耗的功率开关和经受反向恢复条件的整流二极管的功率转换器的使用，缓冲电路和相关方法可减轻与开关损耗和反向恢复条件相关的不利影响。 在一个实施例中，缓冲电路包括具有耦合到整流二极管的第一和第二能量存储装置和缓冲二极管的恢复电路。 缓冲电路还包括耦合在整流二极管两端的第三能量存储装置，其被配置为与恢复电路配合以减轻与反向恢复条件相关的不利影响，并降低电源开关两端的电压变化率，以减少 开关损耗。

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：US5956243A

公开(公告)日：1999-09-21

申请号：US133067

申请日：1998-08-12

申请人： Hengchun Mao

发明人： Hengchun Mao

IPC分类号： H02M1/00 ,  H02M1/42 ,  H02M7/25 ,  H02M3/18 ,  H02M7/04

CPC分类号： H02M1/4208 ,  H02M7/25 ,  Y02B70/126

摘要： An three-level boost rectifier circuit is described for universal line applications. The boost rectifier circuit includes a boost inductor connected to the input voltage. A bridge rectifier composed of four diodes is connected between the boost inductor and two output capacitors. Two boost switches, each with two series diodes are connected between the bridge diodes and the output capacitors. A threshold switch is connected between the bridge diodes and the output capacitors. The threshold switch is closed when the input voltage is below a predetermined threshold voltage and opened when the input is above the threshold voltage. Closing the threshold switch acts to reverse bias two of the four bridge diodes, reducing the number of diodes conducting at any given moment to one. This reduces the conduction losses of the circuit at low input voltage, making the circuit more efficient at low-line inputs. Further, the configuration of the boost rectifier circuit of the present invention reduces the required voltage rating for the boost switches, making the boost switches more efficient when conducting current.

摘要翻译： 针对通用线路应用描述了一个三电平升压整流电路。 升压整流电路包括连接到输入电压的升压电感器。 由四个二极管组成的桥式整流器连接在升压电感和两个输出电容之间。 两个升压开关，每个具有两个串联二极管连接在桥二极管和输出电容器之间。 桥接二极管和输出电容之间连接一个门限开关。 当输入电压低于预定阈值电压时，阈值开关闭合，当输入高于阈值电压时，门限开关断开。 闭合阈值开关用于反向偏置四个桥式二极管中的两个，从而将在任何给定时刻导通的二极管的数量减少到一个。 这降低了在低输入电压下电路的导通损耗，使电路在低线路输入时更有效率。 此外，本发明的升压整流电路的结构降低了升压开关所需的额定电压，使得升压开关在导通电流时更加有效。

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：US5912549A

公开(公告)日：1999-06-15

申请号：US905105

申请日：1997-08-01

申请人： Richard W. Farrington ,  William P. Gardiner ,  Mark E. Jacobs ,  Hengchun Mao

发明人： Richard W. Farrington ,  William P. Gardiner ,  Mark E. Jacobs ,  Hengchun Mao

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

CPC分类号： H02M1/4225 ,  Y02B70/126 ,  Y02P80/112

摘要： For use with a power factor correction circuit, a current mode controller, a method of operating current mode control to achieve power factor correction thereof and a power supply incorporating the controller or the method. In one embodiment, the controller includes: (1) a modulator, coupled to a switch in the power factor correction circuit, that senses an electrical characteristic and a current passing through the power factor correction circuit and provides, in response thereto, a control signal to the switch and (2) a compensation circuit, coupled to an input of the power factor correction circuit, that provides a compensation signal to the modulator that is a function of a rectified line voltage provided to the input of the power factor correction circuit. The compensation signal causes the modulator to modify the control signal to reduce a total harmonic distortion (THD) of the power factor correction circuit.

摘要翻译： 用于功率因数校正电路，电流模式控制器，操作电流模式控制以实现其功率因数校正的方法和结合该控制器或方法的电源。 在一个实施例中，控制器包括：（1）耦合到功率因数校正电路中的开关的调制器，其感测通过功率因数校正电路的电特性和电流，并响应于此提供控制信号 和（2）补偿电路，其耦合到功率因数校正电路的输入，该补偿电路为调制器提供补偿信号，该补偿信号是提供给功率因数校正电路的输入的整流线电压的函数。 补偿信号使调制器修改控制信号，以降低功率因数校正电路的总谐波失真（THD）。