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    • 23. 发明授权
    • Soft-switching techniques for power inverter legs
    • 电源逆变器脚的软开关技术
    • US07110269B2
    • 2006-09-19
    • US11199778
    • 2005-08-09
    • Xiao Hong CaoShu-Yuen Ron Hui
    • Xiao Hong CaoShu-Yuen Ron Hui
    • H02M3/335H05B37/02
    • H02M3/3376H02M2001/0058H05B41/2856Y02B70/1433Y02B70/1491
    • This invention relates to new soft-switching techniques for minimizing switching losses and stress in power electronic circuits using inverter legs. By choosing the switching frequency with specific relationships with the resonant frequency of the power electronic circuits, the proposed switching technique enables the power electronic circuits to achieve soft switching under full load and short-circuit conditions at the defined frequencies for both capacitive and inductive loads. This technique can be applied to an electronic circuit with two switches connected in totem pole configuration between two dc voltage rails or commonly known as a power inverter leg or inverter arm. Examples of these circuits are class-D power converter, half-bridge power converters and full-bridge power converters or inverters. The proposed techniques allow inverter circuits with resistive, capacitive and inductive loads to achieve soft switching.
    • 本发明涉及用于最小化使用逆变器支路的电力电子电路中的开关损耗和应力的新的软开关技术。 通过选择具有与功率电子电路的谐振频率的特定关系的开关频率,所提出的开关技术使得电力电子电路能够在电容和电感负载的限定频率下在满载和短路条件下实现软开关。 该技术可以应用于具有两个直流电压轨道或通常称为电力逆变器支路或逆变臂的图腾柱配置的两个开关的电子电路。 这些电路的示例是D类功率转换器,半桥功率转换器和全桥功率转换器或逆变器。 所提出的技术允许具有电阻,电容和电感负载的逆变器电路实现软开关。
    • 24. 发明授权
    • Single sensor control of power converters
    • 电源转换器的单传感器控制
    • US06580275B2
    • 2003-06-17
    • US09870408
    • 2001-05-30
    • Shu-Yuen Ron HuiShu-Hung Henry Chung
    • Shu-Yuen Ron HuiShu-Hung Henry Chung
    • G01R3100
    • H05B41/36G01R31/245H05B41/2825H05B41/2855H05B41/3925
    • An apparatus and method for determining the characteristic(s) of a discharge lamp (for example a fluorescent lamp or a high-intensity discharge lamp) operated by a high-frequency electronic ballast including a resonant tank that includes an inductor and a capacitor, wherein the characteristic(s) are selected from the group consisting of lamp input voltage, lamp resistance and lamp power, and including capability for measuring the inductor voltage and/or current, and capability for determining the characteristic(s) from the measured inductor voltage and/or current. More generally, the apparatus and method provide techniques for determining a number of parameters of a power converter circuit simply from measuring an inductor voltage or inductor current.
    • 一种用于确定由包括电感器和电容器的谐振槽的高频电子镇流器操作的放电灯(例如荧光灯或高强度放电灯)的特性的装置和方法,其中 特性选自灯输入电压,灯电阻和灯功率,并且包括用于测量电感器电压和/或电流的能力,以及从测量的电感器电压确定特性的能力,以及 /或当前。 更一般地,该装置和方法提供了仅通过测量电感器电压或电感器电流来确定功率转换器电路的多个参数的技术。
    • 27. 发明申请
    • APPARATUS AND METHODS OF OPERATION OF PASSIVE AND ACTIVE LED LIGHTING EQUIPMENT
    • 被动和有源LED照明设备的操作方法和操作方法
    • US20120146525A1
    • 2012-06-14
    • US13129793
    • 2010-08-20
    • Shu Yuen Ron HuiWu Chen
    • Shu Yuen Ron HuiWu Chen
    • H05B37/02
    • H05B33/0809Y02B20/342
    • This invention is concerned with the control and design of a passive or an active LED lighting system that does not need electrolytic capacitors in the entire system and can generate light output with reduced luminous flux fluctuation. The proposal is particularly suitable, but not restricted to, off-line applications in which the lighting system is powered by the ac mains. By eliminating electrolytic capacitors which have a limited lifetime of typically 15,000 hours, the proposed system can be developed with robust electrical components such as inductor and diode circuits, and it features long lifetime, low maintenance cost, robustness against extreme temperature variations and good power factor. The proposed circuits can become dimmable systems if the AC input voltage can be adjusted by external means.
    • 本发明涉及在整个系统中不需要电解电容器的无源或有源LED照明系统的控制和设计,并且可以产生具有降低的光通量波动的光输出。 该建议特别适用于但不限于照明系统由交流电源供电的离线应用。 通过消除寿命通常为15,000小时的电解电容器,所提出的系统可以用诸如电感器和二极管电路的鲁棒电气元件开发,并且具有寿命长,维护成本低,对极端温度变化的鲁棒性和良好的功率因数 。 如果可以通过外部手段调整交流输入电压,则所提出的电路可以变成可调光系统。
    • 29. 发明授权
    • Coreless printed-circuit-board (PCB) transformers and operating techniques therefor
    • 无芯印刷电路板(PCB)变压器及其操作技术
    • US08102235B2
    • 2012-01-24
    • US12847638
    • 2010-07-30
    • Shu Yuen Ron HuiSai Chun Tang
    • Shu Yuen Ron HuiSai Chun Tang
    • H01F5/00
    • H01F19/04H01F17/0006H05K1/165H05K2201/10166
    • Optimal operating techniques are disclosed for using coreless printed-circuit-board (PCB) transformers under (1) minimum input power conditions and (2) maximum energy efficiency conditions. The coreless PCB transformers should be operated at or near the ‘maximum impedance frequency’ (MIF) in order to reduce input power requirement. For maximum energy efficiency, the transformers should be at or near the “maximum efficiency frequency” (MEF) which is below the MIF. The operating principle has been confirmed by measurement and simulation. The proposed operating techniques can be applied to coreless PCB transformers in many circuits that have to meet stringent height requirements, for example to isolate the gates of power MOSFET and IGBT devices from the input power supply.
    • 公开了在(1)最小输入功率条件下和(2)最大能量条件下使用无芯无线印刷电路板(PCB)变压器的最佳操作技术。 无芯PCB变压器应运行在或接近“最大阻抗频率”(MIF),以减少输入功率需求。 为了最大的能量效率,变压器应处于或接近低于MIF的“最大效率频率”(MEF)。 工作原理已通过测量和模拟证实。 所提出的操作技术可以应用于许多电路中的无芯PCB变压器,这些电路必须满足严格的高度要求,例如将功率MOSFET和IGBT器件的栅极与输入电源隔离开来。