搜尋結果
Leading edge dimming cuts of the front edge of each waves’ half cycle. Conversely trailing edge dimming cuts out the second half of each waves’ half cycle. Trailing edge dimmers are now the more popular of the two types.
This circuit is called a leading-edge dimmer or forward phase dimming. Waveform of the output voltage of a thyristor dimmer set for 60 volts RMS output, with 120 V input. The red trace shows the output device switching on about 5.5 ms after the input (blue) voltage crosses zero.
Trailing edge dimmers have a much lower minimum load than the leading edge, making them far more suitable for powering LEDs. USING LEADING EDGE DIMMERS WITH LEDS. The high minimum load requirements of leading edge dimmers mean you can struggle to meet this minimum with LED lamps and their low power consumption.
2019年4月24日 · Leading-edge dimmers are typically lower cost and so are more widely used whereas trailing–edge dimmers exhibit lower EMI and are preferred in some markets (notably Europe) and noise sensitive environments.
兩個最受歡迎的調光器是前沿調光器 (leading edge dimmer) 和後緣調光器 (trailing edge dimmer)。 前沿調光器 (leading edge dimmer) 之間的差異，電壓增加後零交叉，這個調光器抑制一段時間。
Leading-edge dimmer are cheaper and simpler than trailing-edge, and were used originally to dim incandescent and halogen bulbs or magnetic low voltage transformers. The leading edge dimmers use a ‘TRIAC’ (Triode for Alternating Current) switch to control power, and are sometimes called TRIAC dimmers.
A leading edge phase control dimmer is a type of 0-100% dimmer that reduces the power at the beginning of the cycle. Leading edge phase control dimmers are often used with low-voltage LEDs and can result in a more gradual dimming effect.
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