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    High power factor electronic ballast with fully differential circuit topology
    1.
    发明授权
    High power factor electronic ballast with fully differential circuit topology 失效
    具有全差分电路拓扑的高功率因数电子镇流器

    公开(公告)号：US06271633B1

    公开(公告)日：2001-08-07

    申请号：US09431496

    申请日：1999-11-01

    Applicant: Eric B. Shen ,  Gert W. Bruning

    Inventor： Eric B. Shen ,  Gert W. Bruning

    IPC: H05B3702

    CPC classification number: H05B41/2885 ,  H02M5/4585 ,  H05B41/28 ,  H05B41/282 ,  H05B41/288 ,  Y02B20/183 ,  Y02B20/202

    Abstract: An electronic ballast circuit for driving a gas discharge lamp from a mains voltage signal supply includes a ballast bridge unit that has an upper and lower signal line. A storage capacitor is coupled across the bridge unit. The bridge unit also includes an input converter bridge having at least two switches coupled in series at an input common terminal, wherein the upper switch is coupled to the upper signal line of the ballast bridge unit and the lower switch is coupled to the lower signal line. The ballast bridge also includes an output converter bridge having at least two switches coupled in series at an output common terminal. A reference voltage signal bridge in the ballast bridge unit includes at least two switches coupled in series at a reference voltage common terminal, so as to form a first differential voltage signal between the common input terminal and the reference voltage common terminal and a second differential voltage signal between the common output terminal and the reference voltage common terminal.

    Abstract translation: 用于从电源电压信号电源驱动气体放电灯的电子镇流器电路包括具有上和下信号线的镇流器桥单元。 存储电容器跨越桥接单元耦合。 桥单元还包括输入转换器桥，其具有在输入公共端串联耦合的至少两个开关，其中上开关耦合到镇流器桥单元的上信号线，下开关耦合到下信号线 。 镇流器桥还包括输出转换器桥，其具有在输出公共端串联耦合的至少两个开关。 镇流器桥单元中的参考电压信号桥包括在参考电压公共端串联耦合的至少两个开关，以便在公共输入端和参考电压公共端之间形成第一差分电压信号，以及第二差分电压 公共输出端子和参考电压公共端之间的信号。

    High power factor electronic ballast with load dependent bus voltage regulation
    4.
    发明授权
    High power factor electronic ballast with load dependent bus voltage regulation 失效

    公开(公告)号：US06534933B2

    公开(公告)日：2003-03-18

    申请号：US09855469

    申请日：2001-05-15

    Applicant: Eric B. Shen

    Inventor： Eric B. Shen

    IPC: G05F100

    CPC classification number: H05B41/28 ,  H05B41/2853 ,  Y02B20/186

    Abstract: A high power factor electronic ballast for a gas discharge lamp is disclosed which can provide bus voltage control in response to varying load conditions without the need for direct sensing of the load conditions. The electronic ballast includes an input stage; an output stage; a slow loop controller configured to regulate the bus voltage to a constant value during steady state operation; a hysteresis band over voltage protection (OVP) controller for maintaining the bus voltage in a predetermined hysteresis voltage band during open circuit and pre-ignition conditions; and an on-time limiting controller for guaranteeing a minimum on-time for the input stage. The electronic ballast further includes at least one DC bus capacitor for storing energy created from energy imbalances between the input and output stage. The novel construction makes it possible to regulate the bus voltage to a constant value under steady state conditions using the slow loop controller, and to prevent the bus voltage from increasing in an uncontrolled manner under open circuit and pre-ignition conditions using the over voltage protection controller. This is advantageously achieved without having to directly sense the load condition.

    High power factor electronic ballast with simplified circuit topology
    5.
    发明授权
    High power factor electronic ballast with simplified circuit topology 失效
    具有简化电路拓扑的高功率因数电子镇流器

    公开(公告)号：US06225755B1

    公开(公告)日：2001-05-01

    申请号：US09431582

    申请日：1999-11-01

    Applicant: Eric B. Shen

    Inventor： Eric B. Shen

    IPC: H05B4116

    CPC classification number: H05B41/2886 ,  H05B41/28 ,  H05B41/2885 ,  H05B41/2887 ,  Y02B20/202 ,  Y10S315/07

    Abstract: An electronic ballast circuit for driving a gas discharge lamp from a mains voltage signal supply includes a ballast bridge unit having upper and lower signal lines. A capacitive divider is disposed across the bridge. The capacitive divider comprises at least two capacitors coupled in series at a common reference voltage signal terminal. The bridge unit also includes two diodes coupled in series at a rectifier common terminal, wherein each of the diodes is respectively coupled to one of the signal lines of the bridge unit. The bridge unit further includes an input converter bridge and an output converter bridge each having at least two switches coupled in series at input and output common terminals, respectively.

    Abstract translation: 用于从电源电压信号电源驱动气体放电灯的电子镇流器电路包括具有上和下信号线的镇流器桥单元。 电容分压器布置在桥上。 电容分压器包括在公共参考电压信号端子上串联耦合的至少两个电容器。 桥接单元还包括在整流器公共端子串联耦合的两个二极管，其中每个二极管分别耦合到桥接单元的信号线之一。 桥单元还包括输入转换器桥和输出转换器桥，每个输入转换器桥具有至少两个开关，分别在输入和输出公共端串联耦合。

    High power factor electronic ballast with lossless switching
    6.
    发明授权
    High power factor electronic ballast with lossless switching 失效
    高功率因数电子镇流器，无损切换

    公开(公告)号：US06670779B2

    公开(公告)日：2003-12-30

    申请号：US10011620

    申请日：2001-12-05

    Applicant: Eric B. Shen

    Inventor： Eric B. Shen

    IPC: G05F100

    CPC classification number: H05B41/2888 ,  H05B41/2886 ,  Y02B20/202 ,  Y10T307/615

    Abstract: An electronic converter receiving low frequency input power, converting this power to DC power at a voltage greater than the input voltage peak, and providing output power from a commutator stage. Lossless switching of the power semiconductor devices in the input stage is achieved by turning each device on at an instant when voltage across the device's current terminals is zero. Current through a main inductor of the input circuit is triangular and substantially unidirectional for at least a few high frequency cycles. To ensure lossless switching, current through the main inductor of the input circuit may be reversed briefly before switching. For use as an electronic arc lamp ballast, the commutator stage also uses lossless switching, and substantially unidirectional triangular current through an output inductor is reversed periodically.

    Abstract translation: 接收低频输入功率的电子转换器，以大于输入电压峰值的电压将该功率转换为直流电力，并提供来自换向器级的输出功率。 在输入级中的功率半导体器件的无损切换通过在器件的当前端子上的电压为零时瞬间转动每个器件来实现。 通过输入电路的主电感器的电流是至少几个高频周期的三角形和基本单向的。 为了确保无损切换，切换之前，输入电路主电感的电流可能会短暂反转。 为了用作电子电弧灯镇流器，换向器级还使用无损开关，并且通过输出电感器的基本单向三角形电流周期性地反向。

    Buck-boost function type electronic ballast with bus capacitor current sensing
    9.
    发明授权
    Buck-boost function type electronic ballast with bus capacitor current sensing 失效
    降压 - 升压功能型电子镇流器，总线电容电流检测

    公开(公告)号：US06278245B1

    公开(公告)日：2001-08-21

    申请号：US09539507

    申请日：2000-03-30

    Applicant: Faye Li ,  Eric B. Shen

    Inventor： Faye Li ,  Eric B. Shen

    IPC: H05B3702

    CPC classification number: H05B41/2885 ,  H05B41/28 ,  H05B41/2886 ,  H05B41/2888 ,  Y02B20/202

    Abstract: An electronic ballast for a high intensity discharge lamp combines the functions of a boost converter and a buck converter and combines the line voltage rectification with the load commutation. With such a configuration, only one controller is required, and the control signal for the controller is taken off a resistor in series with the bus capacitor. As such, the lamp power is indirectly controlled by regulating the input buck current to the buck converter portion, instead of by measuring the lamp current.

    Abstract translation: 用于高强度放电灯的电子镇流器结合了升压转换器和降压转换器的功能，并将线路电压整流与负载换向相结合。 通过这样的配置，仅需要一个控制器，并且控制器的控制信号与总线电容器串联一个电阻器。 因此，通过调节到降压转换器部分的输入降压电流而不是通过测量灯电流来间接地控制灯功率。

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