Method for detecting conduction phase angle of light modulator

Method for detecting conduction phase angle of light modulator

  • CN 105,263,242 A
  • Filed: 11/24/2015
  • Published: 01/20/2016
  • Est. Priority Date: 11/24/2015
  • Status: Active Application
First Claim
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1. detect the method at dimmer conduction phase angle, it is characterized in that, comprising:

  • Within the particular mains voltages cycle, utilize counter to carry out step-by-step counting to line voltage, obtain count value;

    The count value of counter is compared with reference count value;

    If count value-reference count value >

    X, then increase the clock cycle of counter, if count value-reference count value <

    -Y, then reduce the clock cycle of counter, X, Y are default natural number, when-Y<

    count value-reference count value <

    X being detected, namely think that counter clock and mains frequency match;

    The conduction phase angle of dimmer is calculated according to the count value in dimmer conduction moment.

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