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    • 2. 发明申请
    • METHOD OF CONTROLLING AN ELECTRICAL DIMMING BALLAST DURING LOW TEMPERATURE CONDITIONS
    • 在低温条件下控制电子镇流器的方法
    • WO2011127145A3
    • 2011-12-08
    • PCT/US2011031389
    • 2011-04-06
    • LUTRON ELECTRONICS COCHITTA VENKATESHOZBEK MEHMETQUAYLE JONATHAN ROBERTTAIPALE MARK SVESKOVIC DRAGAN
    • CHITTA VENKATESHOZBEK MEHMETQUAYLE JONATHAN ROBERTTAIPALE MARK SVESKOVIC DRAGAN
    • H05B41/392
    • H05B41/3921H05B41/3925
    • An electronic ballast circuit for driving a gas discharge lamp is operable to control the lamp to avoid flicking and flashing of the intensity of the lamp during low temperature conditions. The ballast circuit includes an inverter circuit for receiving a DC bus voltage and for generating a high-frequency output voltage, a resonant tank circuit for receiving the high-frequency output voltage and generating a sinusoidal voltage for driving said lamp, and a control circuit operatively coupled to the inverter circuit for adjusting an intensity of the lamp between a minimum intensity and a maximum intensity. The control circuit receives a control signal representative of a lamp temperature of the lamp, and increases the minimum intensity of the lamp if the lamp temperature of the lamp drops below a cold temperature threshold. In addition, the ballast circuit may also include a temperature sensing circuit operable to generate the control signal representative of the lamp temperature of the lamp.
    • 用于驱动气体放电灯的电子镇流器电路可操作以控制灯以避免在低温条件下闪烁和闪烁灯的强度。 镇流器电路包括用于接收DC总线电压并且用于产生高频输出电压的逆变器电路,用于接收高频输出电压并产生用于驱动所述灯的正弦电压的谐振回路电路,以及可操作地控制电路 耦合到逆变器电路,用于在最小强度和最大强度之间调节灯的强度。 控制电路接收表示灯的灯温度的控制信号,并且如果灯的灯温降至冷温度阈值以下,则增加灯的最小强度。 另外,镇流器电路还可以包括温度感测电路,该温度感测电路可操作以生成表示灯的灯温度的控制信号。
    • 4. 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
    • WO2010027389A3
    • 2010-08-12
    • PCT/US2009003056
    • 2009-05-15
    • LUTRON ELECTRONICS CONEWMAN ROBERT C JRTAIPALE MARK S
    • NEWMAN ROBERT C JRTAIPALE 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.
    • 一种用于驱动气体放电灯的电子镇流器包括以部分自激振荡方式工作的逆变器电路。 所述逆变器电路包括具有主变压器的推挽式变换器,所述主变压器具有用于产生高频AC电压的初级绕组,半导体开关与主变压器的初级绕组电耦合,用于交替地通过初级绕组传导电流, 以及用于逐周期地控制半导体开关的栅极驱动电路。 响应于从主变压器得到的第一控制信号,驱动电路控制(例如导通)半导体开关,并响应于从控制电路接收的第二控制信号控制(例如,关断)半导体开关。 控制电路响应于流经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。
    • 6. 发明申请
    • MEASUREMENT CIRCUIT FOR AN ELECTRONIC BALLAST
    • 电子镇流器的测量电路
    • WO2010027390A2
    • 2010-03-11
    • PCT/US2009003103
    • 2009-05-18
    • LUTRON ELECTRONICS COTAIPALE MARK SNEWMAN ROBERT C JRRHODES SCOTT E
    • TAIPALE MARK SNEWMAN ROBERT C JRRHODES SCOTT E
    • H05B41/282G01R15/18G01R19/00G01R19/06
    • H05B41/2822
    • An electronic ballast for driving a gas discharge lamp comprises a measurement circuit for measuring a lamp current flowing through the lamp and a lamp voltage produced across the lamp. The ballast comprises a first winding magnetically coupled to a main transformer of an inverter circuit, and a second winding magnetically coupled to a resonant inductor of a resonant tank circuit. The first and second windings are coupled in series electrical connection to generate a voltage representative of the magnitude of the lamp voltage. The ballast further comprises a current transformer having primary windings coupled in series with the electrodes of the lamp. The measurement circuit integrates the current conducted through secondary windings of the current transformer only during every other half-cycle of the lamp voltage to generate a control signal representative of the magnitude of the lamp current that is in-phase with the lamp voltage.
    • 用于驱动气体放电灯的电子镇流器包括用于测量流过灯的灯电流的测量电路和灯两端产生的灯电压。 镇流器包括磁耦合到逆变器电路的主变压器的第一绕组和与谐振回路的谐振电感器磁耦合的第二绕组。 第一和第二绕组串联电连接以产生代表灯电压大小的电压。 镇流器还包括具有与灯的电极串联耦合的初级绕组的电流互感器。 测量电路仅在灯电压的每隔一个半周期内对电流互感器的次级绕组传导的电流进行积分,以产生表示与灯电压同相的灯电流的大小的控制信号。
    • 9. 发明专利
    • Electronic ballast having adaptive frequency shifting
    • AU2007215452A1
    • 2007-08-23
    • AU2007215452
    • 2007-01-29
    • LUTRON ELECTRONICS CO
    • TAIPALE MARK S
    • H05B41/392
    • 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.