I asked about a dimmer switch, and was told one has an induction coil. What benefit is an induction coil in a dimmer switch?
ZE-02S has induction coil built-in on the circuit board, so it is 5/8" longer than ZE-02.
Answer
Your dimmer switch works by switching the mains on part-way through each half-cycle. The longer the switch-on delay the lower the current to the lamp.
Figure 1. Triac switching waveform.
The problem is that the switching on at any point other than the zero-cross makes a square-ish waveform which is high in harmonics (multiples of the 50 or 60 Hz power frequency). These can extend right up into radio frequencies and create interference radiating out from the wiring.
An inductor 'resists' sudden changes in current and, effectively, rounds off the corners of the square-wave enough to reduce the high-frequency emissions.
Your lights will operate without it. You or your neighbours might notice some interference.
No comments:
Post a Comment