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    • 85. 发明申请
    • METHOD OF CONTROLLING AN OPERATING FREQUENCY OF AN ELECTRONIC DIMMING BALLAST
    • 控制电子吊灯的操作频率的方法
    • WO2012024295A1
    • 2012-02-23
    • PCT/US2011/047917
    • 2011-08-16
    • LUTRON ELECTRONICS COMPANY, INC.QUAYLE, Jonathan, RobertCHITTA, Venkatesh
    • QUAYLE, Jonathan, RobertCHITTA, Venkatesh
    • H05B41/288H05B41/24
    • H05B41/295H05B41/2825H05B41/3925H05B41/3927
    • An electronic ballast for driving a gas discharge lamp comprises an inverter circuit, a resonant tank circuit, and a control circuit operable to determine an approximation of a resonant frequency of the resonant tank circuit and to control the inverter circuit approximation of the resonant frequency. The control circuit determines the approximation of the resonant frequency by adjusting an operating frequency of a high-frequency inverter output voltage provided to the resonant tank circuit from a frequency above the resonant frequency down towards the resonant frequency, measuring the magnitude of a lamp voltage across the lamp, and storing the present value of the operating frequency as the resonant frequency when the magnitude of the lamp voltage reaches a maximum value. The control circuit may control the operating frequency of the inverter output voltage in response to the approximation of the resonant frequency and a target intensity of the lamp.
    • 用于驱动气体放电灯的电子镇流器包括逆变器电路,谐振回路和可操作以确定谐振回路的谐振频率的近似值并控制谐振频率的逆变器电路近似的控制电路。 控制电路通过从谐振频率以上的频率向谐振频率调节提供给谐振回路的高频逆变器输出电压的工作频率,来测定谐振频率的近似值,测量灯电压的幅度 并且当灯电压的大小达到最大值时将工作频率的当前值作为谐振频率存储。 响应于谐振频率和灯的目标强度的近似,控制电路可以控制逆变器输出电压的工作频率。
    • 90. 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。