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    • 1. 发明申请
    • ELECTRONIC BALLAST HAVING ASYMMETRIC RESONANT CIRCUIT TOPOLOGY
    • 具有不对称谐振电路拓扑的电子镇流器
    • WO2010027392A1
    • 2010-03-11
    • PCT/US2009/003322
    • 2009-05-28
    • LUTRON ELECTRONICS CO., INC.NEWMAN, Robert, C., Jr.TAIPALE, Mark, S.
    • NEWMAN, Robert, C., Jr.TAIPALE, Mark, S.
    • H05B41/282
    • H05B41/2822
    • An electronic ballast for driving a gas discharge lamp having first and second electrodes comprises an inverter circuit and a symmetric resonant tank circuit for minimizing the RFI noise produced at the electrodes of the lamp. The inverter circuit receives a substantially DC bus voltage generates a high-frequency AC voltage. The symmetric resonant tank circuit comprises a split resonant inductor having first and second windings magnetically coupled together. The first and second windings electrically coupled between the respective electrodes of the lamp and the inverter circuit. The symmetric resonant tank further comprises first and second capacitors coupled in series electrical connection between the electrodes of the lamp with the junction of the first and second capacitors coupled to the DC bus voltage at the input of the inverter circuit.
    • 用于驱动具有第一和第二电极的气体放电灯的电子镇流器包括用于使在灯的电极处产生的RFI噪声最小化的逆变器电路和对称谐振回路。 逆变器电路接收基本上直流母线电压产生高频交流电压。 对称谐振回路包括具有磁耦合在一起的第一和第二绕组的分离谐振电感器。 电耦合在灯的各个电极和逆变器电路之间的第一和第二绕组。 对称谐振箱还包括在灯的电极之间串联电连接的第一和第二电容器,其中第一和第二电容器的耦合到逆变器电路的输入处的直流母线电压的结。
    • 2. 发明申请
    • ELECTRONIC BALLAST HAVING A PARTIALLY SELF-OSCILLATING INVERTER CIRCUIT
    • 具有部分自振荡逆变器电路的电子镇流器
    • WO2010027389A2
    • 2010-03-11
    • PCT/US2009/003056
    • 2009-05-15
    • LUTRON ELECTRONICS CO., INC.NEWMAN, Robert, C., Jr.TAIPALE, Mark, S.
    • NEWMAN, Robert, C., Jr.TAIPALE, Mark, S.
    • H05B41/295
    • H05B41/295
    • An electronic ballast for driving a gas discharge lamp comprises an inverter circuit that operates in a partially self-oscillating manner. The inverter circuit comprises a push-pull converter having a main transformer having a primary winding for producing a high-frequency AC voltage, semiconductor switches electrically coupled to the primary winding of the main transformer for conducting current through the primary winding on an alternate basis, and gate drive circuits for controlling the semiconductor switches on a cycle-by-cycle basis. The drive circuits control (e.g., turn on) the semiconductor switches in response to first control signals derived from the main transformer, and control (e.g., turn off) the semiconductor switches in response to second control signals received from a control circuit. The control circuit controls the semiconductor switches in response to a peak value of an integral of an inverter current flowing through the inverter circuit.
    • 用于驱动气体放电灯的电子镇流器包括以部分自振荡的方式操作的逆变器电路。 逆变器电路包括具有主变压器的推挽转换器,该主变压器具有用于产生高频AC电压的初级绕组,电耦合到主变压器的初级绕组的半导体开关,用于交替地传导通过初级绕组的电流, 以及用于逐个循环控制半导体开关的栅极驱动电路。 驱动电路响应于从主变压器导出的第一控制信号控制(例如,导通)半导体开关,以及响应于从控制电路接收的第二控制信号来控制(例如,关闭)半导体开关。 控制电路响应于流过逆变器电路的逆变器电流的积分的峰值来控制半导体开关。
    • 8. 发明申请
    • ELECTRONIC BALLAST HAVING ADAPTIVE FREQUENCY SHIFTING
    • 具有自适应频移功能的电子镇流器
    • WO2007094971A1
    • 2007-08-23
    • PCT/US2007/002655
    • 2007-01-29
    • LUTRON ELECTRONICS CO., INC.TAIPALE, Mark, S.
    • TAIPALE, Mark, S.
    • H05B41/392
    • H05B41/2828H05B41/3925
    • An electronic ballast for driving a gas discharge lamp avoids mercury pumping in the lamp by adaptively changing an operating frequency of an inverter of the ballast when operating near high-end. The inverter of the ballast generates a high-frequency AC voltage, which is characterized by the operating frequency and an operating duty cycle. The ballast also comprises a resonant tank for coupling the high-frequency AC voltage to the lamp to generate a present lamp current through the lamp, and a current sense circuit for determining the magnitude of the present lamp current. A hybrid analog/digital control circuit controls both the operating frequency and the operating duty cycle of the inverter with closed-loop techniques. The control circuit adjusts the duty cycle of the inverter in response to a target lamp current and the present lamp current. To avoid mercury pumping, the control circuit attempts to maximize the duty cycle of the inverter when operating at high-end. Specifically, the control circuit adjusts the operating frequency of the inverter in response to the target lamp current signal, the duty cycle of the inverter, and a target duty cycle in order to drive the operating duty cycle toward the target duty cycle.
    • 用于驱动气体放电灯的电子镇流器通过在高端操作时自适应地改变镇流器的逆变器的工作频率来避免灯泡中的汞泵送。 镇流器的逆变器产生高频交流电压,其特征在于工作频率和工作占空比。 镇流器还包括用于将高频AC电压耦合到灯以产生通过灯的当前灯电流的谐振槽,以及用于确定当前灯电流的大小的电流检测电路。 混合模拟/数字控制电路通过闭环技术控制逆变器的工作频率和工作占空比。 控制电路响应于目标灯电流和当前灯电流来调节逆变器的占空比。 为了避免水银泵浦,控制电路试图在高端运行时最大化变频器的占空比。 具体地,控制电路根据目标灯电流信号,逆变器的占空比和目标占空比来调整逆变器的工作频率,以便将工作占空比驱动到目标占空比。