| 摘要 |
<p>Disclosed is a method for detecting an output conduction angle θ of a triac dimmer, comprising: connecting a nonlinear current source to an output end of a diode in a full-wave rectifier in parallel; and keeping an energy-storage voltage of a parasitic capacitor of the diode in the full-wave rectifier at zero before a triac dimmer has an output, and releasing the energy-storage voltage of the parasitic capacitor of the diode in the full-wave rectifier when an input at an alternating-current side of the full-wave rectifier approaches zero, thereby accurately detecting an output conduction angle θ of the triac dimmer with small power consumption.</p> |
