| 摘要 |
PURPOSE: A traffic signal controller for removing load unbalance by nonsymmetric control is provided to prevent harmonic frequency by alternately turning on a plurality of signal lamps in a night dimming control mode. CONSTITUTION: A light driving unit supplies power to a traffic signal. The light driving unit is divided into first and second groups. A switch detects a zero cross point of the power. A controller(10) counters the zero-cross point. The controller outputs a light control signal to the light driving unit. The light driving unit includes a single input unit, a power controller, a detector, and a status display unit. |
