公开(公告)号：US07872886B2

公开(公告)日：2011-01-18

申请号：US12034229

申请日：2008-02-20

申请人： Ming Xu ,  Julu Sun ,  Ya Liu ,  Fred C. Lee

发明人： Ming Xu ,  Julu Sun ,  Ya Liu ,  Fred C. Lee

IPC分类号： H02M7/00

CPC分类号： H02M3/1584 ,  H02M2001/0074 ,  Y02B70/1425 ,  Y10T307/685

摘要： Improved regulation and transient response are provided by a power supply architecture providing both unregulated and regulated voltage converters in parallel but deriving input power from separate power supplies connected in series wherein regulated and unregulated branches each provide a substantially fixed and constant proportion of the output current. The series connection of input power sources may provide a further feedback mechanism in addition to feedback for regulation which enhances overall performance. As a perfecting feature of the invention, inductor-less resonant converters which are switched in an interleaved fashion may be used in the unregulated branch while substantially cancelling the characteristic large output voltage ripple thereof.

摘要翻译： 改进的调节和瞬态响应由电源架构提供，其提供并联的不稳压和稳压电压转换器，但是从串联连接的单独电源导出输入功率，其中调节和未调节的分支各自提供基本上固定的和恒定的输出电流比例。 输入电源的串联连接可以提供进一步的反馈机制，以及增强整体性能的调节反馈。 作为本发明的完善特征，可以在非调节支路中使用以交错方式切换的无电感谐振转换器，同时基本上消除其特征性的大输出电压纹波。

公开(公告)号：US20090206804A1

公开(公告)日：2009-08-20

申请号：US12034229

申请日：2008-02-20

申请人： Ming Xu ,  Julu Sun ,  Ya Liu ,  Fred C. Lee

发明人： Ming Xu ,  Julu Sun ,  Ya Liu ,  Fred C. Lee

IPC分类号： G05F1/10

CPC分类号： H02M3/1584 ,  H02M2001/0074 ,  Y02B70/1425 ,  Y10T307/685

摘要： Improved regulation and transient response are provided by a power supply architecture providing both unregulated and regulated voltage converters in parallel but deriving input power from separate power supplies connected in series wherein regulated and unregulated branches each provide a substantially fixed and constant proportion of the output current. The series connection of input power sources may provide a further feedback mechanism in addition to feedback for regulation which enhances overall performance. As a perfecting feature of the invention, inductor-less resonant converters which are switched in an interleaved fashion may be used in the unregulated branch while substantially cancelling the characteristic large output voltage ripple thereof.

摘要翻译： 改进的调节和瞬态响应由电源架构提供，其提供并联的不稳压和稳压电压转换器，但是从串联连接的单独电源导出输入功率，其中调节和未调节的分支各自提供基本上固定的和恒定的输出电流比例。 输入电源的串联连接可以提供进一步的反馈机制，以及增强整体性能的调节反馈。 作为本发明的完善特征，可以在非调节支路中使用以交错方式切换的无电感谐振转换器，同时基本上消除其特征性的大输出电压纹波。

公开(公告)号：US07746041B2

公开(公告)日：2010-06-29

申请号：US11691800

申请日：2007-03-27

申请人： Ming Xu ,  Julu Sun ,  Fred C. Lee

发明人： Ming Xu ,  Julu Sun ,  Fred C. Lee

IPC分类号： G05F1/613 ,  G05F1/40

CPC分类号： H02M1/14 ,  H02M3/157 ,  H02M3/1584

摘要： A voltage converter having four switches Q1, Q2, Q3, Q4, connected in series and operated in pairs in a complementary fashion. An input voltage is provided across the four switches. A middle capacitor is connected in parallel with two middle switches Q2, Q3. Voltage output is provided across switches Q3 and Q4 (i.e. at a midpoint of the four switches). Series-connected output capacitors can be connected in parallel with the set of four switches. The middle capacitor alone or in combination with parallel connected capacitors, when connected to the input voltage or output terminals functions as a capacitive voltage divider for voltage conversion and/or regulation with extremely high efficiency and which can provide either step-down or step-up function. Also, an output inductor can be provided as a perfecting feature to further increase efficiency. Alternatively, two of the four switches can be replaced with rectifying diodes. Alternatively, the voltage converter has two or more sets of four switches connected in parallel. The two sets can be connected by resistor-capacitor ladder, or an inductor-capacitor ladder for charge/voltage sharing to reduce voltage ripple.

摘要翻译： 具有四个开关Q1，Q2，Q3，Q4的电压转换器，串联连接并以互补的方式成对运行。 在四个开关之间提供输入电压。 中间电容器与两个中间开关Q2，Q3并联连接。 电压输出提供在开关Q3和Q4之间（即在四个开关的中点）。 串联输出电容可与四组开关并联。 中间电容器单独使用或与并联电容器组合，当连接到输入电压或输出端子用作用于电压转换和/或调节的电容分压器，具有极高的效率，并且可以提供降压或升压 功能。 此外，可以提供输出电感器作为完善特征以进一步提高效率。 或者，四个开关中的两个可以用整流二极管代替。 或者，电压转换器具有并联连接的两组或多组四个开关。 这两组可以通过电阻电容梯形电阻或电感 - 电容梯级连接，用于充电/电压共享，以降低电压纹波。

公开(公告)号：US07254047B2

公开(公告)日：2007-08-07

申请号：US11094434

申请日：2005-03-31

申请人： Yuancheng Ren ,  Julu Sun ,  Ming Xu ,  Fred C. Lee

发明人： Yuancheng Ren ,  Julu Sun ,  Ming Xu ,  Fred C. Lee

IPC分类号： H02M3/335

CPC分类号： H02M3/33592 ,  H02M3/3376 ,  H02M2001/0058 ,  Y02B70/1433 ,  Y02B70/1475 ,  Y02B70/1491

摘要： Power converters having reduced body diode conduction loss, reduced reverse recovery loss and lower switching noise, among other benefits, have a resonant capacitor Cr connected across an unfiltered output. The resonant capacitor Cr resonates with the leakage inductance Lk of the transformer. The resonant capacitor and leakage inductance are selected such that ½ a LC resonance period is equal to an ON time of each secondary switch S1 S2. The resonance provides zero current switching for secondary switches S1 S2, eliminates zero body diode conduction during dead times, and eliminates reverse recovery losses in the secondary switches. The present invention is applicable to many different circuit topologies such as full bridge, active clamp forward, push-pull forward, and center-tap secondary. The present converters provide high energy conversion efficiency and high frequency operation.

摘要翻译： 具有降低的体二极管导通损耗，降低的反向恢复损耗和较低开关噪声以及其他优点的功率转换器具有连接在未滤波输出端的谐振电容器Cr。 谐振电容器Cr与变压器的漏电感Lk共振。 谐振电容器和漏电感被选择为使得LC共振周期的1/2相当于每个次级开关S 1 S 2的导通时间。 谐振为次级开关S 1 S 2提供零电流开关，在死区时间消除零体二极管导通，并消除次级开关中的反向恢复损耗。 本发明可应用于许多不同的电路拓扑，例如全桥，有源钳前进，推挽前进和中心抽头次级。 本转换器提供高能量转换效率和高频操作。

公开(公告)号：US20070296383A1

公开(公告)日：2007-12-27

申请号：US11691800

申请日：2007-03-27

申请人： Ming Xu ,  Julu Sun ,  Fred C. Lee

发明人： Ming Xu ,  Julu Sun ,  Fred C. Lee

IPC分类号： G05F1/00

CPC分类号： H02M1/14 ,  H02M3/157 ,  H02M3/1584

摘要： A voltage converter having four switches Q1, Q2, Q3, Q4, connected in series and operated in pairs in a complementary fashion. An input voltage is provided across the four switches. A middle capacitor is connected in parallel with two middle switches Q2, Q3. Voltage output is provided across switches Q3 and Q4 (i.e. at a midpoint of the four switches). Series-connected output capacitors can be connected in parallel with the set of four switches. The middle capacitor alone or in combination with parallel connected capacitors, when connected to the input voltage or output terminals functions as a capacitive voltage divider for voltage conversion and/or regulation with extremely high efficiency and which can provide either step-down or step-up function. Also, an output inductor can be provided as a perfecting feature to further increase efficiency. Alternatively, two of the four switches can be replaced with rectifying diodes. Alternatively, the voltage converter has two or more sets of four switches connected in parallel. The two sets can be connected by resistor-capacitor ladder, or an inductor-capacitor ladder for charge/voltage sharing to reduce voltage ripple.

摘要翻译： 具有四个开关Q 1，Q 2，Q 3，Q 4的电压转换器，以互补的方式成对地串联连接。 在四个开关之间提供输入电压。 中间电容器与两个中间开关Q 2，Q 3并联连接。电压输出提供在开关Q 3和Q 4之间（即在四个开关的中点）。 串联输出电容可与四组开关并联。 中间电容器单独使用或与并联电容器组合，当连接到输入电压或输出端子用作用于电压转换和/或调节的电容分压器，具有极高的效率，并且可以提供降压或升压 功能。 此外，可以提供输出电感器作为完善特征以进一步提高效率。 或者，四个开关中的两个可以用整流二极管代替。 或者，电压转换器具有并联连接的两组或多组四个开关。 这两组可以通过电阻电容梯形电阻或电感 - 电容梯级连接，用于充电/电压共享，以降低电压纹波。

公开(公告)号：US07265525B2

公开(公告)日：2007-09-04

申请号：US11094438

申请日：2005-03-31

申请人： Ming Xu ,  Julu Sun ,  Jinghai Zhou ,  Fred C. Lee

发明人： Ming Xu ,  Julu Sun ,  Jinghai Zhou ,  Fred C. Lee

IPC分类号： G05F1/59

CPC分类号： H02M3/1582 ,  H02M3/338

摘要： A voltage converter uses a component such as a JFET or four-terminal power MOSFET having no body diode and exhibiting no body diode conduction characteristic as a synchronous rectifier to reduce switching losses and body diode conduction losses and to support high frequency switching so that use of smaller components and higher current densities can be achieved. These effects are enhanced by a self-driven circuit utilizing positive feedback to enhance switching speed and reduce switching losses which increase with switching frequency.

摘要翻译： 电压转换器使用诸如JFET或不具有体二极管导通特性的JFET或四端子功率MOSFET的组件作为同步整流器来减少开关损耗和体二极管导通损耗并支持高频开关，从而使用 可以实现更小的组件和更高的电流密度。 这些效应通过利用正反馈的自驱动电路增强，以提高开关速度并减少开关频率增加的开关损耗。

公开(公告)号：US20090303753A1

公开(公告)日：2009-12-10

申请号：US12136413

申请日：2008-06-10

申请人： Dianbo Fu ,  Fred C. Lee ,  Ya Liu ,  Ming Xu

发明人： Dianbo Fu ,  Fred C. Lee ,  Ya Liu ,  Ming Xu

IPC分类号： H02M3/335

CPC分类号： H02M3/3376 ,  H02M3/33592 ,  H02M2001/0058 ,  Y02B70/1433 ,  Y02B70/1475 ,  Y02B70/1491 ,  Y02P80/112

摘要： A resonant switched power converter having switching frequency controlled in response to an output voltage thereof achieves over-current protection such as at start-up or under short circuit conditions using a resonant tank circuit which provides a notch filter in addition to a band pass filter. A additional band pass filter provided in the resonant tank circuit achieves increased power transfer to a load and reduced circulating resonant currents and conduction losses. The inductances of the preferred LCLCL tank circuit or other tank circuit with two pass band filters and a notch filter may be integrated into a single electrical component.

摘要翻译： 具有响应于其输出电压控制的开关频率的谐振开关功率转换器，例如在使用提供除带通滤波器之外的陷波滤波器的谐振回路的启动或短路条件下实现过电流保护。 设置在谐振回路中的附加带通滤波器实现了对负载的功率传递增加，循环谐振电流和传导损耗的降低。 具有两个通带滤波器和陷波滤波器的优选LCLCL振荡电路或其它振荡电路的电感可以集成到单个电气部件中。

公开(公告)号：US07742318B2

公开(公告)日：2010-06-22

申请号：US12136413

申请日：2008-06-10

申请人： Dianbo Fu ,  Fred C. Lee ,  Ya Liu ,  Ming Xu

发明人： Dianbo Fu ,  Fred C. Lee ,  Ya Liu ,  Ming Xu

IPC分类号： H02M3/335

CPC分类号： H02M3/3376 ,  H02M3/33592 ,  H02M2001/0058 ,  Y02B70/1433 ,  Y02B70/1475 ,  Y02B70/1491 ,  Y02P80/112

摘要： A resonant switched power converter having switching frequency controlled in response to an output voltage thereof achieves over-current protection such as at start-up or under short circuit conditions using a resonant tank circuit which provides a notch filter in addition to a band pass filter. A additional band pass filter provided in the resonant tank circuit achieves increased power transfer to a load and reduced circulating resonant currents and conduction losses. The inductances of the preferred LCLCL tank circuit or other tank circuit with two pass band filters and a notch filter may be integrated into a single electrical component.

摘要翻译： 具有响应于其输出电压控制的开关频率的谐振开关功率转换器，例如在使用提供除带通滤波器之外的陷波滤波器的谐振回路的启动或短路条件下实现过电流保护。 设置在谐振回路中的附加带通滤波器实现了对负载的功率传递增加，循环谐振电流和传导损耗的降低。 具有两个通带滤波器和陷波滤波器的优选LCLCL振荡电路或其它振荡电路的电感可以集成到单个电气部件中。

公开(公告)号：US20060109696A1

公开(公告)日：2006-05-25

申请号：US11094434

申请日：2005-03-31

申请人： Yuancheng Ren ,  Julu Sun ,  Ming Xu ,  Fred Lee

发明人： Yuancheng Ren ,  Julu Sun ,  Ming Xu ,  Fred Lee

IPC分类号： H02M7/757

CPC分类号： H02M3/33592 ,  H02M3/3376 ,  H02M2001/0058 ,  Y02B70/1433 ,  Y02B70/1475 ,  Y02B70/1491

摘要： Power converters having reduced body diode conduction loss, reduced reverse recovery loss and lower switching noise, among other benefits, have a resonant capacitor Cr connected across an unfiltered output. The resonant capacitor Cr resonates with the leakage inductance Lk of the transformer. The resonant capacitor and leakage inductance are selected such that ½ a LC resonance period is equal to an ON time of each secondary switch S1 S2. The resonance provides zero current switching for secondary switches S1 S2, eliminates zero body diode conduction during dead times, and eliminates reverse recovery losses in the secondary switches. The present invention is applicable to many different circuit topologies such as full bridge, active clamp forward, push-pull forward, and center-tap secondary. The present converters provide high energy conversion efficiency and high frequency operation.

摘要翻译： 具有降低的体二极管导通损耗，降低的反向恢复损耗和较低开关噪声以及其他优点的功率转换器具有连接在未滤波输出端的谐振电容器Cr。 谐振电容器Cr与变压器的漏电感Lk共振。 选择谐振电容器和漏电感，使得LC谐振周期的1/2相当于每个次级开关S 1 S 2的导通时间。谐振为次级开关S 1 S 2提供零电流开关，消除零体二极管导通 并且消除了次级开关中的反向恢复损耗。 本发明可应用于许多不同的电路拓扑，例如全桥，有源钳前进，推挽前进和中心抽头次级。 本转换器提供高能量转换效率和高频操作。

公开(公告)号：US20120039092A1

公开(公告)日：2012-02-16

申请号：US13208348

申请日：2011-08-12

申请人： Ming Xu ,  Julu Sun

发明人： Ming Xu ,  Julu Sun

IPC分类号： H02M3/335

CPC分类号： H02M3/3376 ,  H02M2001/0058 ,  Y02B70/1433 ,  Y02B70/1491

摘要： A current-input-type parallel resonant DC/DC converter and a method thereof are provided. The converter includes an inverter-circuit for inverting/converting an input DC current into a positive-and-negative alternating square-wave-current, a resonant-network for converting the square-wave-current into a sine-voltage, a transformer for realizing the isolation of the power transmission, a full-wave rectifier-circuit for rectifying the sine-voltage, and an output-filter-circuit for producing a DC output-voltage. The inverter-circuit is connected to both terminals of a primary-winding of the transformer through the resonant-network connected in series with the inverter-circuit, a common-polarity terminal of a first-winding at a secondary side of the transformer and an opposite-polarity terminal of a second-winding at the secondary side of the transformer are respectively connected to an input of the full-wave rectifier-circuit, and an output of the full-wave rectifier-circuit and a center-trap terminal at the secondary side of the transformer are respectively connected to an input of the output-filter-circuit.

摘要翻译： 提供电流输入型并联谐振DC / DC转换器及其方法。 该转换器包括用于将输入DC电流反相/转换为正负交替方波电流的逆变器电路，用于将方波电流转换为正弦电压的谐振网络，用于 实现电力传输的隔离，用于整流正弦电压的全波整流电路，以及用于产生直流输出电压的输出滤波电路。 逆变器电路通过与逆变器电路串联连接的谐振网络连接到变压器的初级绕组的两端，变压器次级侧的第一绕组的共极端子和 在变压器次级侧的第二绕组的极性相反端子分别连接到全波整流电路的输入端，全波整流电路的输出端和中心陷波端子的输出端 变压器的次级侧分别连接到输出滤波电路的输入端。