公开(公告)号：US08299773B2

公开(公告)日：2012-10-30

申请号：US12501031

申请日：2009-07-10

申请人： Yungtaek Jang ,  Milan M. Jovanovic ,  Yi-Hsin Leu ,  Ming-Tsung Hsieh ,  Wei-Hsin Wen ,  Chi-Hsing Huang

发明人： Yungtaek Jang ,  Milan M. Jovanovic ,  Yi-Hsin Leu ,  Ming-Tsung Hsieh ,  Wei-Hsin Wen ,  Chi-Hsing Huang

IPC分类号： G05F5/00 ,  G05F1/00

CPC分类号： H02M1/36 ,  H02M1/4225 ,  Y02B70/126

摘要： A power supply comprises an input voltage detector that detects a drop in input voltage that corresponds to an input voltage loss. A power converter is coupled to the input voltage detector. The power converter, which may be a boost converter or a power factor correction converter, has a switching device that is actuated in accordance with a duty cycle. A duty cycle adjuster is responsive to detection of the drop in the input voltage to adjust the duty cycle of the switching device in order to limit an input current surge through the switching device below a desired level after the input voltage returns.

摘要翻译： 电源包括输入电压检测器，其检测对应于输入电压损失的输入电压的下降。 功率转换器耦合到输入电压检测器。 功率转换器（其可以是升压转换器或功率因数校正转换器）具有根据占空比被致动的开关器件。 占空比调节器响应于检测输入电压的下降以调整开关器件的占空比，以便在输入电压返回之后将开关器件的输入电流浪涌限制在期望的电平以下。

公开(公告)号：US20110006748A1

公开(公告)日：2011-01-13

申请号：US12501031

申请日：2009-07-10

申请人： Yungtaek Jang ,  Milan M. Jovanovic ,  Yi-Hsin Leu ,  Ming-Tsung Hsieh ,  Wei-Hsin Wen ,  Chi-Hsing Huang

发明人： Yungtaek Jang ,  Milan M. Jovanovic ,  Yi-Hsin Leu ,  Ming-Tsung Hsieh ,  Wei-Hsin Wen ,  Chi-Hsing Huang

IPC分类号： G05F5/00

CPC分类号： H02M1/36 ,  H02M1/4225 ,  Y02B70/126

摘要： A power supply comprises an input voltage detector that detects a drop in input voltage that corresponds to an input voltage loss. A power converter is coupled to the input voltage detector. The power converter, which may be a boost converter or a power factor correction converter, has a switching device that is actuated in accordance with a duty cycle. A duty cycle adjuster is responsive to detection of the drop in the input voltage to adjust the duty cycle of the switching device in order to limit an input current surge through the switching device below a desired level after the input voltage returns.

摘要翻译： 电源包括输入电压检测器，其检测对应于输入电压损失的输入电压的下降。 功率转换器耦合到输入电压检测器。 功率转换器（其可以是升压转换器或功率因数校正转换器）具有根据占空比被致动的开关器件。 占空比调节器响应于检测输入电压的下降以调整开关器件的占空比，以便在输入电压返回之后将开关器件的输入电流浪涌限制在期望的电平以下。

公开(公告)号：US20090244944A1

公开(公告)日：2009-10-01

申请号：US12410002

申请日：2009-03-24

申请人： Yungtaek Jang ,  Milan M. Jovanovic ,  Bruce C.H. Cheng

发明人： Yungtaek Jang ,  Milan M. Jovanovic ,  Bruce C.H. Cheng

IPC分类号： H02M7/06

CPC分类号： H02M3/158 ,  H02J7/345 ,  H02M3/33576 ,  Y02B40/90

摘要： A power converter system supplies power to one or more loads. The power converter system comprises at least one power converter operating at a desired efficiency; and a power storage system coupled to the at least one power converter for receiving power supplied from the at least one power converter and storing power therein when the at least one power converter operates at an efficiency that is below the desired efficiency.

摘要翻译： 电力转换器系统为一个或多个负载供电。 功率转换器系统包括以期望效率操作的至少一个功率转换器; 以及耦合到所述至少一个功率转换器的功率存储系统，用于当所述至少一个功率转换器以低于期望效率的效率工作时，接收从所述至少一个功率转换器提供的功率并将功率存储在其中。

公开(公告)号：US06906930B2

公开(公告)日：2005-06-14

申请号：US10608314

申请日：2003-06-26

申请人： Yungtaek Jang ,  Milan M. Jovanovic

发明人： Yungtaek Jang ,  Milan M. Jovanovic

IPC分类号： H02M1/34 ,  H02M3/24 ,  H02M3/335 ,  H02M3/337

CPC分类号： H02M1/34 ,  H02M3/3376 ,  H02M2001/342 ,  H02M2001/346 ,  Y02B70/1491

摘要： An isolated boost converter includes first and second switches that are switched simultaneously, a transformer and an energy storage capacitor on the primary side of the transformer for storing energy received from input power source. In one embodiment, when the first and second switches are closed, the energy in the capacitor is transferred to the output load while a boost inductor is charged, and when the first and second switches are open, the boost inductor provides energy from the input voltage source to supply the load and to charge the capacitor, In one embodiment, a third switch is provided to relieve the voltage stress on the secondary side.

摘要翻译： 隔离式升压转换器包括同时开关的第一和第二开关，变压器和变压器初级侧的储能电容器，用于存储从输入电源接收的能量。 在一个实施例中，当第一和第二开关闭合时，电容器中的能量被传送到输出负载，同时升压电感器被充电，并且当第一和第二开关断开时，升压电感器从输入电压 源提供负载并对电容器充电。在一个实施例中，提供第三开关以减轻次级侧的电压应力。

公开(公告)号：US06353547B1

公开(公告)日：2002-03-05

申请号：US09819699

申请日：2001-03-29

申请人： Yungtaek Jang ,  Milan M. Jovanovic

发明人： Yungtaek Jang ,  Milan M. Jovanovic

IPC分类号： H02M75387

CPC分类号： H02M7/487 ,  H02M3/33569 ,  H02M2001/0058

摘要： Three-level, constant-frequency, soft-switched isolated converters provide zero-voltage-switching (ZVS) conditions for the turn-on of all primary switches over a wide range of input voltage and output load. These converters achieve ZVS with the minimum duty cycle loss and circulating current, which optimizes the conversion efficiency. The ZVS of the primary switches is achieved by the energy stored in an inductor on the primary side of the isolation transformer. The inductor and transformer are arranged so that a change in the phase shift between the outer and inner pair of switches of the series connection of four switches changes the volt-second product on the windings of the transformer and the windings of the inductor in opposite directions. In some embodiments the primary-side inductor is coupled inductor with two windings, whereas in the other embodiments the inductor has only one winding.

摘要翻译： 三电平，恒频，软开关隔离转换器为广泛的输入电压和输出负载的所有主开关导通提供零电压开关（ZVS）条件。 这些转换器以最小的占空比损耗和循环电流实现ZVS，从而优化了转换效率。 初级开关的ZVS通过存储在隔离变压器初级侧的电感器中的能量来实现。 电感器和变压器被布置成使得四个开关的串联的外部和内部对开关之间的相移的变化改变了变压器的绕组上的伏秒乘积和电感器的绕组在相反方向 。 在一些实施例中，初级侧电感器是具有两个绕组的耦合电感器，而在其它实施例中，电感器仅具有一个绕组。

公开(公告)号：US20090303762A1

公开(公告)日：2009-12-10

申请号：US12479430

申请日：2009-06-05

申请人： Yungtaek Jang ,  Milan M. Jovanovic

发明人： Yungtaek Jang ,  Milan M. Jovanovic

IPC分类号： H02M7/00

CPC分类号： H02M1/4208 ,  Y02B70/126 ,  Y02P80/112

摘要： A PFC rectifier comprises a first converter having a first output capacitor and a second converter having a second output capacitor. The he first and second capacitors are coupled to each other to increase the output voltage of the PFC rectifier. Fore example the first or second output capacitors can be serially coupled to each other. At least one or both of the first or second converters comprise buck or buck-boost converters, including inverting or non-inverter buck converters. The first and second converters can also form a bi-directional ac-ac inverter.

摘要翻译： PFC整流器包括具有第一输出电容器的第一转换器和具有第二输出电容器的第二转换器。 他的第一和第二电容器彼此耦合以增加PFC整流器的输出电压。 例如，第一或第二输出电容器可以彼此串联耦合。 第一或第二转换器中的至少一个或两个包括降压或降压 - 升压转换器，包括反相或非逆变器降压转换器。 第一和第二转换器也可以形成双向ac-ac逆变器。

公开(公告)号：US06504497B2

公开(公告)日：2003-01-07

申请号：US09855715

申请日：2001-05-16

申请人： Yungtaek Jang ,  Milan M. Jovanovic

发明人： Yungtaek Jang ,  Milan M. Jovanovic

IPC分类号： H03M100

CPC分类号： H02J7/345 ,  H02M2001/007 ,  H02M2001/0096

摘要： The stored energy in the energy-storage capacitors of a power supply during the hold-up time is improved by providing two groups of energy storage capacitors, and by connecting one group of capacitors to the input of a hold-up-time extension circuit that has its output connected to the other group of energy-storage capacitors. Each group of energy-storage capacitors may consist of a single capacitor, or a number of capacitors connected in parallel. The hold-up-time extension circuit is designed so that its output is regulated at a voltage that is lower than the minimum regulation voltage of the output-stage dc/dc converter. As a result, the hold-up-time extension circuit is inactive during the normal operation mode. i.e., when the input voltage is present. In fact, during the normal operation mode both groups of capacitors are effectively connected in parallel so that their voltages are equal.

公开(公告)号：US06356462B1

公开(公告)日：2002-03-12

申请号：US09775636

申请日：2001-02-05

申请人： Yungtaek Jang ,  Milan M. Jovanovic

发明人： Yungtaek Jang ,  Milan M. Jovanovic

IPC分类号： H02M3335

CPC分类号： H02M3/33569

摘要： A family of soft-switched, full-bridge pulse-width-modulated (FB PWM) converters provides zero-voltage-switching (ZVS) conditions for the turn-on of the bridge switches over a wide range of input voltage and output load. The FB PWM converters of this family achieve ZVS with the minimum duty cycle loss and circulating current, which optimizes the conversion efficiency. The ZVS of the primary switches is achieved by employing two magnetic components whose volt-second products change in the opposite directions with a change in phase shift between the two bridge legs. One magnetic component always operates as a transformer, where the other magnetic component can either be a coupled inductor, or uncoupled (single-winding) inductor. The transformer is used to provide isolated output(s), whereas the inductor is used to store the energy for ZVS.

摘要翻译： 一系列软开关，全桥脉宽调制（FB PWM）转换器为宽范围的输入电压和输出负载的桥接开关提供零电压开关（ZVS）条件。 该系列的FB PWM转换器以最小的占空比损耗和循环电流实现ZVS，从而优化了转换效率。 初级开关的ZVS通过使用两个磁性部件来实现，其中伏特产品在相反方向上改变，两个桥臂之间的相移发生变化。 一个磁性部件总是作为变压器工作，其中另一个磁性部件可以是耦合电感器或非耦合（单绕组）电感器。 变压器用于提供隔离输出，而电感用于存储ZVS的能量。

公开(公告)号：US6049473A

公开(公告)日：2000-04-11

申请号：US249743

申请日：1999-02-11

申请人： Yungtaek Jang ,  Milan M. Jovanovic

发明人： Yungtaek Jang ,  Milan M. Jovanovic

IPC分类号： H02M1/00 ,  H02M1/42 ,  H02M5/42

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

摘要： A three-phase discontinuous-conduction-mode (DCM), pulse-width-modulated (PWM) boost rectifier using harmonic-injection control is provided with a feedforward path to vary the duty cycle of the PWM modulator according to the input voltage, so as to provide improved transient response. In one embodiment, the feedforward path provides to the PWM modulator a ramp voltage that has a slope proportional to the magnitude of the input line voltage. In one embodiment, the harmonic injection signal is summed with the error signal of an output feedback loop. In another embodiment, the harmonic injection signal is integrated and summed with the ramp voltage of the feedforward path. Moreover, by adding a nonlinear gain control circuit, the DC gain of the DCM boost rectifier at light load is adaptively reduced to achieve stability of the rectifier at light load.

摘要翻译： 提供使用谐波注入控制的三相不连续导通模式（DCM），脉冲宽度调制（PWM）升压整流器，其具有根据输入电压来改变PWM调制器的占空比的前馈路径，因此 以提供改善的瞬态响应。 在一个实施例中，前馈路径向PWM调制器提供斜坡电压，该斜坡电压具有与输入线电压的幅度成比例的斜率。 在一个实施例中，谐波注入信号与输出反馈回路的误差信号相加。 在另一个实施例中，谐波注入信号被积分并与前馈路径的斜坡电压相加。 此外，通过添加非线性增益控制电路，轻载时DCM升压整流器的直流增益自适应降低，以实现轻载时整流器的稳定性。

公开(公告)号：US07218081B2

公开(公告)日：2007-05-15

申请号：US10834238

申请日：2004-04-29

申请人： Yungtaek Jang ,  Milan M. Jovanovic

发明人： Yungtaek Jang ,  Milan M. Jovanovic

IPC分类号： G05F1/563

CPC分类号： H02M3/335 ,  H02M1/4225 ,  H02M3/33546 ,  H02M2001/0048 ,  H02M2001/342 ,  Y02B70/126 ,  Y02B70/1491

摘要： The present invention includes multiple power converters for driving one or more loads via an input power source, AC or DC. A first switching power converter has first one or more windings coupled to an input power source, and a second switching power converter having second one or more windings coupled to one or more loads. A magnetic device comprising a single integrated magnetic core couples the first one or more windings to the second one or more windings for reducing switching loss.

摘要翻译： 本发明包括用于通过输入电源AC或DC驱动一个或多个负载的多个功率转换器。 第一开关功率转换器具有耦合到输入电源的第一个或多个绕组，以及具有耦合到一个或多个负载的第二个或多个绕组的第二开关功率转换器。 包括单个集成磁芯的磁性装置将第一个或多个绕组耦合到第二个一个或多个绕组以减少开关损耗。