公开(公告)号：US08228025B2

公开(公告)日：2012-07-24

申请号：US11938042

申请日：2007-11-09

申请人： Wing Choi Ho ,  Chi Kwan Lee ,  Ron Shu Yuen Hui ,  Shu Hung Chung

发明人： Wing Choi Ho ,  Chi Kwan Lee ,  Ron Shu Yuen Hui ,  Shu Hung Chung

IPC分类号： H02J7/00 ,  H02J7/04

CPC分类号： H02J50/12 ,  H02J7/025 ,  H02J50/40

摘要： This invention provides an electronic control method for a planar inductive battery charging apparatus on which one or more electronic loads such as mobile phones, MP3 players etc can be placed and charged simultaneously. The power control circuit of the charging pad consists of two power conversion stages. Depending on the nature of the input power supply, the first power stage is an AC-DC power converter with variable output voltage control and a second stage is a DC-AC power inverter with constant current control. The combination of the two stages provides power control of the charging pad and generates AC magnetic flux of ideally constant magnitude over the charging areas within a group of primary windings that are excited.

摘要翻译： 本发明提供一种用于平面感应电池充电装置的电子控制方法，其上可以同时放置和充电诸如移动电话，MP3播放器等一个或多个电子负载。 充电垫的功率控制电路由两个电源转换级组成。 根据输入电源的性质，第一功率级是具有可变输出电压控制的AC-DC电力转换器，第二级是具有恒定电流控制的DC-AC电力逆变器。 两级的组合提供了充电垫的功率控制，并且在被激励的一组初级绕组内的充电区域上产生理想恒定幅度的AC磁通量。

公开(公告)号：US07304439B2

公开(公告)日：2007-12-04

申请号：US09948994

申请日：2001-09-06

申请人： Pak Chuen Tang ,  Yiu Hung Lam ,  Shu Hung Chung ,  Ron Shu-yuen Hui

发明人： Pak Chuen Tang ,  Yiu Hung Lam ,  Shu Hung Chung ,  Ron Shu-yuen Hui

IPC分类号： H05B37/02

CPC分类号： H05B41/3924 ,  H05B41/3925

摘要： In order to achieving wide dimming range for compact and tubular fluorescent lamps, two novel control approaches are proposed. (i) Novel techniques for suppressing oscillatory effects in the Triac circuit so as to maintain stable Triac operation over a wide firing angle range and (ii) a hybrid dimming control technique in the ballast inverter circuit for achieving wide dimming range from 100% to about 3%. Concerning point (i) both dissipative and non-dissipative energy absorption schemes (EAS) are proposed to suppress the transient effects in the Triac circuit when the Triac is turned on. The essence of the EAS is to ensure that the Triac circuit can be operated in a stable manner without oscillations or inadvertent turn-off. With respect to pint (ii) a hybrid dimming method is proposed in which unlike traditional control methods that use inverter frequency control only for dimming purposes, both dc link voltage and inverter frequency are varied. The essence of the new dimming control is to reduce the range of the inverter frequency variation so that the overall dimming range can be made as wide as possible.

摘要翻译： 为了实现紧凑型和管状荧光灯的宽调光范围，提出了两种新颖的控制方法。 （i）用于抑制Triac电路中的振荡效应的新技术，以便在宽的触发角度范围内保持稳定的Triac操作，以及（ii）用于镇流逆变器电路中的混合调光控制技术，以实现从100％到大约的宽调光范围 3％。 关于点（i）提出耗散和非耗散能量吸收方案（EAS），以在Triac开启时抑制Triac电路中的瞬态效应。 EAS的本质是确保Triac电路可以稳定运行，无振荡或无意的关断。 关于品脱（ii）提出了一种混合调光方法，其中不同于使用变频器频率控制仅用于调光目的的传统控制方法，直流链路电压和逆变器频率都是变化的。 新的调光控制的本质是减小变频器频率变化的范围，使整体调光范围尽可能宽。

公开(公告)号：US08107268B2

公开(公告)日：2012-01-31

申请号：US12556450

申请日：2009-09-09

申请人： Shu Hung Chung ,  Tin Ho Li

发明人： Shu Hung Chung ,  Tin Ho Li

IPC分类号： H02H7/122

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

摘要： A passive lossless snubber cell for a switched-mode power converter comprises an energy absorbing circuit and an energy resetting circuit coupled to said energy absorbing circuit. The energy absorbing circuit is arranged to release energy stored in a snubber capacitor of the energy absorbing circuit to a storage capacitor of the energy resetting circuit through a resonant pathway of the snubber cell in response to a first switching action of a power converter transistor switch. The energy resetting circuit is arranged to release the energy stored therein to a part of a circuit of the power converter in response to a second switching action of the power converter transistor switch, the second switching action being a successive action to the first switching action. The passive lossless snubber cell has several advantages over existing snubbering techniques. First, it provides zero-current-switching (ZCS) and zero-voltage-switching (ZVS) conditions for turning on and off, respectively, the switch over a wide load range. Second, it does not introduce extra voltage stress on the switch. Third, by taking the ripple current through the switch into account, the peak switch current during the snubber resonance period is designed to be less than the designed switch current without the snubber. Hence, the proposed snubber does not introduce extra current stress on the switch.

摘要翻译： 用于开关模式功率转换器的无源无损耗缓冲单元包括耦合到所述能量吸收电路的能量吸收电路和能量复位电路。 能量吸收电路被布置成响应于功率转换器晶体管开关的第一开关动作，通过缓冲器单元的谐振路径释放存储在能量吸收电路的缓冲电容器中的能量到能量复位电路的存储电容器。 能量复位电路被布置成响应于功率转换器晶体管开关的第二开关动作而将存储在其中的能量释放到功率转换器的电路的一部分，第二开关动作是对第一开关动作的连续动作。 无源无损缓冲单元具有优于现有缓冲技术的几个优点。 首先，在宽负载范围内，分别提供开关的零电流开关（ZCS）和零电压开关（ZVS）条件，用于开关。 第二，它不会在开关上引入额外的电压应力。 第三，通过考虑开关中的纹波电流，缓冲器谐振周期期间的峰值开关电流设计为小于设计的开关电流而没有缓冲器。 因此，所提出的缓冲器不会在开关上引入额外的电流应力。

公开(公告)号：US08189351B2

公开(公告)日：2012-05-29

申请号：US11710683

申请日：2007-02-23

申请人： Shu Hung Chung ,  Siu Wai Leung ,  Kee Ming Chan

发明人： Shu Hung Chung ,  Siu Wai Leung ,  Kee Ming Chan

IPC分类号： H02M3/335

CPC分类号： H02M3/28 ,  H02J7/0013 ,  H02J7/0065

摘要： A modular-based, zero-current-switched (ZCS), isolated full-bridge boost converter with multiple inputs is disclosed. Each converter module is used to match the connected input source and control the amount of power drawn from the source. The power from various sources are combined together and delivered to the load through a multiphase transformer. The input inductor of each boost-derived converter module keeps the input current constant and acts as a current source to drive the multiphase transformer through a phase-shifted-controlled full bridge converter. By connecting an auxiliary circuit across the full-bridge input in each module, the transformer leakage inductance and output capacitance of the switching devices are used to create resonant paths for facilitating zero-current-switching of all switching devices.

摘要翻译： 公开了一种基于模块化的零电流开关（ZCS），具有多个输入的隔离式全桥升压转换器。 每个转换器模块用于匹配连接的输入源，并控制从源中抽取的功率量。 来自各种源的功率被组合在一起并通过多相变压器传送到负载。 每个升压转换器模块的输入电感器保持输入电流恒定，并作为电流源，通过相移控制的全桥转换器驱动多相变压器。 通过在每个模块的全桥输入端连接辅助电路，开关器件的变压器漏感和输出电容用于产生谐振路径，以便于所有开关器件的零电流切换。

公开(公告)号：US20110057639A1

公开(公告)日：2011-03-10

申请号：US12556450

申请日：2009-09-09

申请人： Shu Hung Chung ,  Tin Ho Li

发明人： Shu Hung Chung ,  Tin Ho Li

IPC分类号： G05F3/04

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

摘要： A passive lossless snubber cell for a switched-mode power converter comprises an energy absorbing circuit and an energy resetting circuit coupled to said energy absorbing circuit. The energy absorbing circuit is arranged to release energy stored in a snubber capacitor of the energy absorbing circuit to a storage capacitor of the energy resetting circuit through a resonant pathway of the snubber cell in response to a first switching action of a power converter transistor switch. The energy resetting circuit is arranged to release the energy stored therein to a part of a circuit of the power converter in response to a second switching action of the power converter transistor switch, the second switching action being a successive action to the first switching action. The passive lossless snubber cell has several advantages over existing snubbering techniques. First, it provides zero-current-switching (ZCS) and zero-voltage-switching (ZVS) conditions for turning on and off, respectively, the switch over a wide load range. Second, it does not introduce extra voltage stress on the switch. Third, by taking the ripple current through the switch into account, the peak switch current during the snubber resonance period is designed to be less than the designed switch current without the snubber. Hence, the proposed snubber does not introduce extra current stress on the switch.

摘要翻译： 用于开关模式功率转换器的无源无损耗缓冲单元包括耦合到所述能量吸收电路的能量吸收电路和能量复位电路。 能量吸收电路被布置成响应于功率转换器晶体管开关的第一开关动作，通过缓冲器单元的谐振路径释放存储在能量吸收电路的缓冲电容器中的能量到能量复位电路的存储电容器。 能量复位电路被布置成响应于功率转换器晶体管开关的第二开关动作而将存储在其中的能量释放到功率转换器的电路的一部分，第二开关动作是对第一开关动作的连续动作。 无源无损缓冲单元具有优于现有缓冲技术的几个优点。 首先，在宽负载范围内，分别提供开关的零电流开关（ZCS）和零电压开关（ZVS）条件，用于开关。 第二，它不会在开关上引入额外的电压应力。 第三，通过考虑开关中的纹波电流，缓冲器谐振周期期间的峰值开关电流设计为小于设计的开关电流而没有缓冲器。 因此，所提出的缓冲器不会在开关上引入额外的电流应力。

公开(公告)号：US20080205088A1

公开(公告)日：2008-08-28

申请号：US11710683

申请日：2007-02-23

申请人： Shu Hung Chung ,  Siu Wai Leung ,  Kee Ming Chan

发明人： Shu Hung Chung ,  Siu Wai Leung ,  Kee Ming Chan

IPC分类号： H02M3/335

CPC分类号： H02M3/28 ,  H02J7/0013 ,  H02J7/0065

摘要： A modular-based, zero-current-switched (ZCS), isolated full-bridge boost converter with multiple inputs is disclosed. Each converter module is used to match the connected input source and control the amount of power drawn from the source. The power from various sources are combined together and delivered to the load through a multiphase transformer. The input inductor of each boost-derived converter module keeps the input current constant and acts as a current source to drive the multiphase transformer through a phase-shifted-controlled full bridge converter. By connecting an auxiliary circuit across the full-bridge input in each module, the transformer leakage inductance and output capacitance of the switching devices are used to create resonant paths for facilitating zero-current-switching of all switching devices.

摘要翻译： 公开了一种基于模块化的零电流开关（ZCS），具有多个输入的隔离式全桥升压转换器。 每个转换器模块用于匹配连接的输入源，并控制从源中抽取的功率量。 来自各种源的功率被组合在一起并通过多相变压器传送到负载。 每个升压转换器模块的输入电感器保持输入电流恒定，并作为电流源，通过相移控制的全桥转换器驱动多相变压器。 通过在每个模块的全桥输入端连接辅助电路，开关器件的变压器漏感和输出电容用于产生谐振路径，以便于所有开关器件的零电流切换。