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    • 96. 发明授权
    • Resetting an electronic ballast in the event of fault
    • 发生故障时重置电子镇流器
    • US08004198B2
    • 2011-08-23
    • US12474080
    • 2009-05-28
    • Shashank BakreNitin Kumar
    • Shashank BakreNitin Kumar
    • H05B37/02
    • H05B41/2981H05B37/04
    • A ballast for driving one or more lamps includes a controller and a current reduction circuit for accelerating a controller reset. Upon detecting a fault, the controller disables the ballast for a preset period of time, and resets. The controller additionally resets when the ratio of a supplied second value to a supplied first value falls below a threshold value. The current reduction circuit reduces the supplied second value in less than the preset period of time, such that the ratio falls below the threshold value and the controller resets. An emergency lighting system includes the ballast as a primary ballast, a backup ballast, and a primary power source. The controller detects a fault if the primary power source de-energizes and the backup ballast disconnects the one or more lamps from the primary ballast. The current reduction circuit accelerates the reset of the controller when the primary power source de-energizes.
    • 用于驱动一个或多个灯的镇流器包括用于加速控制器复位的控制器和电流减小电路。 检测到故障后,控制器会在预设的时间段内关闭镇流器,并重置。 当提供的第二值与所提供的第一值的比率低于阈值时,控制器另外复位。 电流减小电路在小于预设时间段内减小提供的第二值,使得该比率低于阈值并且控制器复位。 应急照​​明系统包括镇流器作为主要镇流器,备用镇流器和主电源。 如果主电源断电,并且备用镇流器将一个或多个灯与主镇流器断开连接,则控制器将检测故障。 当主电源断电时,电流降低电路加速了控制器的复位。
    • 99. 发明申请
    • Electronic Ballast Control Circuit
    • 电子镇流器控制电路
    • US20100301754A1
    • 2010-12-02
    • US12474049
    • 2009-05-28
    • Shashank BakreNitin Kumar
    • Shashank BakreNitin Kumar
    • H05B37/02
    • H05B41/28H05B41/295H05B41/42
    • A control circuit for use in a ballast configured for powering a first lamp set and a second lamp set. The second lamp set is operated via a controller and a second lamp driver circuit. The controller enables the second lamp driver circuit as a function of a monitored value corresponding to a current through a lamp of the second lamp set. The control circuit includes first and second input terminals for selectively connecting to the power supply. The control circuit reduces the monitored value as a function of a connection state of the first and second input terminals of the control circuit to the power supply. Thus, the control circuit causes the controller to selectively operate the second lamp driver circuit in order to energize the second lamp set in combination with the first lamp set.
    • 一种用于镇流器的控制电路,其配置用于为第一灯组和第二灯组供电。 第二灯组通过控制器和第二灯驱动器电路操作。 控制器使得第二灯驱动器电路作为与通过第二灯组的灯的电流相对应的监视值的函数。 控制电路包括用于选择性地连接到电源的第一和第二输入端子。 控制电路根据控制电路的第一和第二输入端子与电源的连接状态来减小监视值。 因此,控制电路使得控制器选择性地操作第二灯驱动器电路,以便与第一灯组组合激励第二灯组。