公开(公告)号：US07796408B2

公开(公告)日：2010-09-14

申请号：US12346527

申请日：2008-12-30

申请人： Chih-Liang Wang ,  Ching-Sheng Yu

发明人： Chih-Liang Wang ,  Ching-Sheng Yu

IPC分类号： H02M7/21 ,  H02M7/217 ,  H02M7/219

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

摘要： The present invention discloses a half-bridge LLC resonant converter with self-driven synchronous rectifiers, which utilizes a primary IC controller and a gate driver to drive the secondary synchronous rectifiers. In correspondence with the gate drive output voltages of the primary IC controller to the primary switch transistors, the gate driver for the secondary synchronous rectifiers comprises a differential transformer if the primary IC controller outputs two ground-referenced gate drive voltages, which cannot directly drive the primary switch transistors but can be imposed on the differential transformer; or comprises a DC shifter, a DC restorer and a differential transformer if the primary IC controller outputs two gate-source voltages, which can directly drive the primary switch transistors but cannot be imposed on the differential transformer. The drive voltages of the primary switch transistors are unipolar; however the drive voltage of the secondary synchronous rectifiers can be bipolar or unipolar. Under the valid operation mode, this converter can decrease the rectifier conduction losses to increase the power converter efficiency.

摘要翻译： 本发明公开了一种具有自驱动同步整流器的半桥LLC谐振转换器，其利用初级IC控制器和栅极驱动器来驱动次级同步整流器。 对应于初级IC控制器到初级开关晶体管的栅极驱动输出电压，用于次级同步整流器的栅极驱动器包括差分变压器，如果主IC控制器输出两个接地参考栅极驱动电压，其不能直接驱动 初级开关晶体管，但可以施加在差动变压器上; 或者如果主IC控制器输出可以直接驱动初级开关晶体管但不能施加在差分变压器上的两个栅极 - 源极电压，则包括DC移位器，DC恢复器和差分变压器。 主开关晶体管的驱动电压是单极的; 然而，次级同步整流器的驱动电压可以是双极性或单极性。 在有效工作模式下，该转换器可以降低整流器的导通损耗，提高功率转换器的效率。

公开(公告)号：US20090080223A1

公开(公告)日：2009-03-26

申请号：US12199860

申请日：2008-08-28

申请人： Chih-Liang Wang ,  Ching-Sheng Yu

发明人： Chih-Liang Wang ,  Ching-Sheng Yu

IPC分类号： H02M3/335

CPC分类号： H02M3/33592 ,  H02M3/33561 ,  Y02B70/1475

摘要： The present invention relates to a forward converter with self-driven synchronous rectifiers, which utilizes a secondary driving winding and a secondary driving circuit to drive the synchronous rectifiers in the secondary power loop. The secondary driving circuit, which is composed of a level shifter and a signal distributor, can shift the voltage waveform across the secondary driving winding by a predetermined level and distribute proper driving signals to the synchronous rectifiers to reduce the rectifier conduction loss. Specially, the channel of the freewheeling synchronous rectifier still can be turned on during the dead interval to further reduce the body diode conduction loss.

摘要翻译： 本发明涉及一种具有自驱动同步整流器的正激变换器，其利用二次驱动绕组和二次驱动电路来驱动次级功率回路中的同步整流器。 由电平移位器和信号分配器构成的二次驱动电路可以将次级驱动绕组上的电压波形移位预定电平，并将适当的驱动信号分配给同步整流器以减小整流器导通损耗。 特别地，续流同步整流器的通道在死区间仍然可以导通，以进一步降低体二极管的导通损耗。

公开(公告)号：US20110317845A1

公开(公告)日：2011-12-29

申请号：US13229968

申请日：2011-09-12

申请人： Yi-Cheng Yuan ,  Ching-Sheng Yu ,  Stuart Cochrane

发明人： Yi-Cheng Yuan ,  Ching-Sheng Yu ,  Stuart Cochrane

IPC分类号： G10K11/16

CPC分类号： A61F11/06 ,  A61F2011/145 ,  A61M21/02 ,  A61M2021/0027

摘要： An aural device to be worn over the ear of a user during sleeping hours which generates white noise.

公开(公告)号：US20110013424A1

公开(公告)日：2011-01-20

申请号：US12835160

申请日：2010-07-13

申请人： Chih-Liang WANG ,  Ching-Sheng YU

发明人： Chih-Liang WANG ,  Ching-Sheng YU

IPC分类号： H02M3/335

CPC分类号： H02M3/33576

摘要： The present invention discloses a forward converter with secondary side post-regulation and zero voltage switching, where the primary side power loop may adopt a single or a dual transistor structure, driven by a primary side driving circuit with a constant duty ratio so that the voltage waveform across the secondary side power winding has a constant pulse width; the secondary side power loop uses a controllable switch, a magnetic amplifier (MA) or an N channel metal oxide semiconductor field transistor (NMOS), to blank the leading edge of the voltage waveform across the secondary side power winding, regulate the output voltage, and achieve zero voltage switching of primary side switch transistors.

摘要翻译： 本发明公开了一种具有二次侧后置调节和零电压开关的正激变换器，其中初级侧功率回路可以采用由具有恒定占空比的初级侧驱动电路驱动的单晶体管或双晶体管结构， 次级侧功率绕组上的波形具有恒定的脉冲宽度; 次级侧功率回路使用可控开关，磁放大器（MA）或N沟道金属氧化物半导体场晶体管（NMOS），使二次侧功率绕组上的电压波形的前沿空白，调节输出电压， 并实现初级侧开关晶体管的零电压开关。

公开(公告)号：US20100289461A1

公开(公告)日：2010-11-18

申请号：US12776687

申请日：2010-05-10

申请人： Chih-Liang WANG ,  Ching-Sheng Yu

发明人： Chih-Liang WANG ,  Ching-Sheng Yu

IPC分类号： G05F3/04

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

摘要： The present invention discloses a bridgeless active power factor corrector with a logic control comprising a high frequency switch controller, a boost inductor, an output filtering capacitor, two boost transistor modules, two boost diodes, two AC input voltage polarity detectors, and two low frequency switch drivers. With a coupling signal, the two AC input voltage polarity detectors respectively control the two low frequency switch drivers in conjunction with the high frequency switch controller to drive the two boost transistor modules with a logic control so that the inductor current releasing electric energy from the boost inductor can flow through the channels of the two boost transistor modules to effectively reduce the body diode conduction loss.

摘要翻译： 本发明公开了一种具有逻辑控制的无桥无源有功功率因数校正器，包括高频开关控制器，升压电感器，输出滤波电容器，两个升压晶体管模块，两个升压二极管，两个交流输入电压极性检测器和两个低频 开关驱动 使用耦合信号，两个交流输入电压极性检测器分别与高频开关控制器分别控制两个低频开关驱动器，以通过逻辑控制驱动两个升压晶体管模块，使得电感电流从升压中释放电能 电感可以流过两个升压晶体管模块的通道，有效降低体二极管的导通损耗。

公开(公告)号：US20100123517A1

公开(公告)日：2010-05-20

申请号：US12569298

申请日：2009-09-29

申请人： Chih-Liang WANG ,  Ching-Sheng Yu ,  Po-Tai Wong

发明人： Chih-Liang WANG ,  Ching-Sheng Yu ,  Po-Tai Wong

IPC分类号： H02M7/12

CPC分类号： H02M7/217 ,  H02M3/33592 ,  H02M2001/0048 ,  Y02B70/1475 ,  Y02B70/1491

摘要： Conventional diode rectifiers usually suffer from a higher conduction loss. The present invention discloses a gate-controlled rectifier, which comprises a line voltage polarity detection circuit, a constant voltage source, a driving circuit and a gate-controlled transistor. The line voltage polarity detection circuit detects the polarity of the line voltage and controls the driving circuit to turn on or turn off the gate-controlled transistor. The gate-controlled transistor may be a Metal Oxide Semiconductor Field Effect Transistor (MOSFET) with a gate, a source and a drain or an Insulated Gate Bipolar Transistor (IGBT) with a gate, an emitter and a collector. The constant voltage source is provided or induced by external circuits and referred to the source of the MOSFET or the emitter of the IGBT. Thanks to a lower conduction loss, this gate-controlled rectifier can be applied to rectification circuits to increase the rectification efficiency.

摘要翻译： 传统的二极管整流器通常具有较高的导通损耗。 本发明公开了一种门控整流器，其包括线路电压极性检测电路，恒压源，驱动电路和栅极控制晶体管。 线路电压极性检测电路检测线路电压的极性，并控制驱动电路导通或关闭栅极控制晶体管。 栅极控制晶体管可以是具有栅极，源极和漏极的金属氧化物半导体场效应晶体管（MOSFET）或具有栅极，发射极和集电极的绝缘栅双极晶体管（IGBT）。 恒压源由外部电路提供或感应，并称为MOSFET的源极或IGBT的发射极。 由于导通损耗较低，该门控整流器可以应用于整流电路，以提高整流效率。

公开(公告)号：US20090244933A1

公开(公告)日：2009-10-01

申请号：US12346527

申请日：2008-12-30

申请人： Chih-Liang WANG ,  Ching-Sheng Yu

发明人： Chih-Liang WANG ,  Ching-Sheng Yu

IPC分类号： H02M3/335

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

摘要： The present invention discloses a half-bridge LLC resonant converter with self-driven synchronous rectifiers, which utilizes a primary IC controller and a gate driver to drive the secondary synchronous rectifiers. In correspondence with the gate drive output voltages of the primary IC controller to the primary switch transistors, the gate driver for the secondary synchronous rectifiers comprises a differential transformer if the primary IC controller outputs two ground-referenced gate drive voltages, which cannot directly drive the primary switch transistors but can be imposed on the differential transformer; or comprises a DC shifter, a DC restorer and a differential transformer if the primary IC controller outputs two gate-source voltages, which can directly drive the primary switch transistors but cannot be imposed on the differential transformer. The drive voltages of the primary switch transistors are unipolar; however the drive voltage of the secondary synchronous rectifiers can be bipolar or unipolar. Under the valid operation mode, this converter can decrease the rectifier conduction losses to increase the power converter efficiency.

摘要翻译： 本发明公开了一种具有自驱动同步整流器的半桥LLC谐振转换器，其利用初级IC控制器和栅极驱动器来驱动次级同步整流器。 对应于初级IC控制器到初级开关晶体管的栅极驱动输出电压，用于次级同步整流器的栅极驱动器包括差分变压器，如果主IC控制器输出两个接地参考栅极驱动电压，其不能直接驱动 初级开关晶体管，但可以施加在差动变压器上; 或者如果主IC控制器输出可以直接驱动初级开关晶体管但不能施加在差分变压器上的两个栅极 - 源极电压，则包括DC移位器，DC恢复器和差分变压器。 主开关晶体管的驱动电压是单极的; 然而，次级同步整流器的驱动电压可以是双极性或单极性。 在有效工作模式下，该转换器可以降低整流器的导通损耗，提高功率转换器的效率。

公开(公告)号：US08031500B2

公开(公告)日：2011-10-04

申请号：US12776687

申请日：2010-05-10

申请人： Chih-Liang Wang ,  Ching-Sheng Yu

发明人： Chih-Liang Wang ,  Ching-Sheng Yu

IPC分类号： H02M7/217 ,  H02M5/42

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

摘要： The present invention discloses a bridgeless active power factor corrector with a logic control comprising a high frequency switch controller, a boost inductor, an output filtering capacitor, two boost transistor modules, two boost diodes, two AC input voltage polarity detectors, and two low frequency switch drivers. With a coupling signal, the two AC input voltage polarity detectors respectively control the two low frequency switch drivers in conjunction with the high frequency switch controller to drive the two boost transistor modules with a logic control so that the inductor current releasing electric energy from the boost inductor can flow through the channels of the two boost transistor modules to effectively reduce the body diode conduction loss.

摘要翻译： 本发明公开了一种具有逻辑控制的无桥无源有功功率因数校正器，包括高频开关控制器，升压电感器，输出滤波电容器，两个升压晶体管模块，两个升压二极管，两个交流输入电压极性检测器和两个低频 开关驱动 使用耦合信号，两个交流输入电压极性检测器分别与高频开关控制器分别控制两个低频开关驱动器，以通过逻辑控制驱动两个升压晶体管模块，使得电感电流从升压中释放电能 电感可以流过两个升压晶体管模块的通道，有效降低体二极管的导通损耗。

公开(公告)号：US07885086B2

公开(公告)日：2011-02-08

申请号：US12199860

申请日：2008-08-28

申请人： Chih-Liang Wang ,  Ching-Sheng Yu

发明人： Chih-Liang Wang ,  Ching-Sheng Yu

IPC分类号： H02M3/335

CPC分类号： H02M3/33592 ,  H02M3/33561 ,  Y02B70/1475

摘要： The present invention relates to a forward converter with self-driven synchronous rectifiers, which utilizes a secondary driving winding and a secondary driving circuit to drive the synchronous rectifiers in the secondary power loop. The secondary driving circuit, which is composed of a level shifter and a signal distributor, can shift the voltage waveform across the secondary driving winding by a predetermined level and distribute proper driving signals to the synchronous rectifiers to reduce the rectifier conduction loss. Specially, the channel of the freewheeling synchronous rectifier still can be turned on during the dead interval to further reduce the body diode conduction loss.

摘要翻译： 本发明涉及一种具有自驱动同步整流器的正激变换器，其利用二次驱动绕组和二次驱动电路来驱动次级功率回路中的同步整流器。 由电平移位器和信号分配器构成的二次驱动电路可以将次级驱动绕组上的电压波形移位预定电平，并将适当的驱动信号分配给同步整流器以减小整流器导通损耗。 特别地，续流同步整流器的通道在死区间仍然可以导通，以进一步降低体二极管的导通损耗。

公开(公告)号：US08363437B2

公开(公告)日：2013-01-29

申请号：US12554545

申请日：2009-09-04

申请人： Chih-Liang Wang ,  Ching-Sheng Yu ,  Po-Tai Wong

发明人： Chih-Liang Wang ,  Ching-Sheng Yu ,  Po-Tai Wong

IPC分类号： H02H7/125

CPC分类号： H03K17/302 ,  H02M3/33592 ,  Y02B70/1433 ,  Y02B70/1475

摘要： Owing to the property of bidirectional conduction under the saturation mode, synchronous rectifiers in conventional power converters usually suffer from a reverse current under light loads or a shoot-through current under heavy loads. The reverse current may degrade the converter efficiency and the shoot-through current may damage synchronous rectifiers. The present invention discloses a unidirectional metal oxide semiconductor field effect transistor (UMOS), which comprises a metal oxide semiconductor field effect transistor (MOS), a current detection circuit and a fast turn-off circuit. The current detection circuit detects the direction of the current flowing through the MOS. When a forward current is detected, the fast turn-off circuit is disabled and the channel of the MOS can be formed. When a reverse current is detected, the fast turn-off circuit is enabled and the channel of the MOS cannot be formed. This UMOS can be applied, but not limited, to synchronous rectifiers to detect the occurrence of a reverse current or a shoot-through current and fast turn off the channel of the MOSFET.

摘要翻译： 由于在饱和模式下双向传导的特性，常规功率转换器中的同步整流器通常在轻负载下的逆电流或重负载下的直通电流受损。 反向电流可能会降低转换器效率，直通电流可能会损坏同步整流器。 本发明公开了一种单向金属氧化物半导体场效应晶体管（UMOS），其包括金属氧化物半导体场效应晶体管（MOS），电流检测电路和快速关断电路。 电流检测电路检测流过MOS的电流的方向。 当检测到正向电流时，禁止快速关断电路并且可以形成MOS通道。 当检测到反向电流时，快速关断电路被使能，并且不能形成MOS通道。 该UMOS可以应用但不限于同步整流器来检测反向电流或直通电流的发生，并快速关闭MOSFET的通道。