High stability dimmer
    8.
    发明授权
    High stability dimmer 失效
    高稳定性调光器

    公开(公告)号:US08618743B2

    公开(公告)日:2013-12-31

    申请号:US13699907

    申请日:2011-11-16

    IPC分类号: G05F1/00

    摘要: The present invention is aimed at providing a dimmer capable of preventing malfunctions due to noise contamination or waveform distortion of the voltage of an AC power source. The dimmer according to the present invention has a time division control circuit for controlling an effective voltage supplied to a lighting load by regulating the period of time to turn on a switching element, and further includes: a zero-crossing detector section 11 for detecting a zero-crossing point and generating a zero-crossing signal whose value changes at the zero-crossing point; an oscillator 13 for generating an oscillating signal having a frequency equal to that of the AC power source or an integral multiple of this frequency; a reference point determiner section 14 for measuring a phase difference between the zero-crossing signal and the oscillating signal every time the zero-crossing signal is generated, and for determining a reference point for setting the timing of turning on or off the switching element 6 based on a data of the measured value of the phase difference; and a time division control signal generator (on/off timing calculator section 15 and time division control signal generator section 17) for sending an on/off signal to the switching element 6 at the timing determined on the basis of the reference point and the effective voltage to be supplied to the lighting load.

    摘要翻译: 本发明的目的在于提供一种能够防止由于噪声污染引起的故障或者AC电源的电压的波形失真的调光器。 根据本发明的调光器具有时分控制电路,用于通过调节开关元件的导通时间来控制提供给照明负载的有效电压,并且还包括:过零检测器部分11,用于检测 产生过零点,其过零点的值在零交叉点变化; 振荡器13,用于产生频率等于交流电源频率的振荡信号或该频率的整数倍; 用于在每次产生过零信号时测量过零信号和振荡信号之间的相位差的参考点确定器部分14,并且用于确定用于设置开关元件6的接通或断开定时的参考点 基于相位差的测量值的数据; 以及用于基于参考点确定的定时向开关元件6发送接通/断开信号的时分控制信号发生器(开/关定时计算部15和时分控制信号发生部17) 电压被提供给照明负载。