What is the difference between forward and reverse phase dimming?
Reverse phase dimming usually gives you better overall control and smooth dimming down to 5% light levels, while forward phase normally dims smoothly down to 10%. Generally works better with LED light sources and all electronic low-voltage systems.
Is triac dimming reverse phase?
The most common technology used to produce forward phase controls is Triac based dimming. In this type of dimming, a semiconductor acts as a switch, controlling both positive and negative half cycles. MLV loads convert the output from the dimmer to a low voltage output, so that smaller 12V or 24V lamps can be used.
What are the two types of phase-cut dimming?
Phase-cut dimmers can operate on the leading edge (forward phase-cut) or trailing edge (reverse phase-cut) of the waveform.
What is an ELV type dimmer?
ELV stands for Electronic Low Voltage. An ELV dimmer is known by a number of names. ELV dimmers are also called simply “electronic dimmers”, as well as “trailing edge dimmers”. These names come from the way in which this dimmer transitions your LED’s luminosity.
What is a low voltage dimmer?
Electronic Low Voltage (ELV) Dimmers were originally designed to control Electronic Low Voltage Transformers used in low voltage (12V) MR16 type fixtures.
What is forward phase dimmer?
Forward-phase dimmers. A standard forward-phase dimmer contains a TRIAC, a DIAC (diode-alternating-current), and an RC (resistance/capacitance) circuit (Figure 1). A potentiometer controls the resistance, and the resulting RC time constant controls the amount of delay before the TRIAC turns on, or the firing angle.
What is Forward Phase Dimming?
Forward Phase Dimming. Also commonly known as ” Triac Dimming”, “SCR Dimming” and phase control dimming, Forward Phase dimming control is the most common form of dimming. It uses a silicon device, usually an SCR or a Triac, to turn the mains waveform on part way through its cycle.