What is the dimming method of silicon controlled dimmable power supply?
2024-05-18
Triac dimming power supplies have been used in dimming incandescent lamps and energy-saving lamps for a long time, and are currently the most widely used dimming method in LED dimming.
Its working principle is to generate a tangential output voltage waveform after cutting the input voltage waveform through the conduction angle. Applying the tangential principle can reduce the effective value of the output voltage, thereby reducing the power of ordinary loads (resistive loads). The advantages of thyristor dimming are high working efficiency and stable performance.
There are three dimming modes for thyristor dimming power supplies in AC applications: zero-crossing cancellation; intermittent; and phase shifting. Among them, the moving phase causes less damage to the eyes, but the price is high; the wave elimination device has a long life and has little external interference. The application in DC is the same as PWM.
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