Before Triac, dimmer has not been in
the commercial market, but be used in
some special occasions, and this dimming
feature is a copper coil by adjusting
the inductor wound to adjust the voltage
to achieve dimming. It’s bulky; 1000W
dimmers
need four lunch boxes size voltage
regulator. This dimmer is not suitable
for home.
This dimmer is completed by cutting
the AC sine wave, the follow drawings
could describe it, using silicon or MOS
tube to
complete the AC front-end cutting
(leading edge dimmer) or back-cut
(Trailing edge dimmer). This dimming
method is suitable
for direct control of 220V incandescent
tungsten, but this method only suit for
incandescent tungsten, due to it cuts
sine wave
100 times per second. For illuminant
incandescent tungsten, before it darkle
it is lightened again. So for 220V
incandescent
lamp there is no strobe problem for
human eyes.
Complete AC Sine Wave
SCR-type Cutting Sine Wave
MOS-type Cutting Sine Wave
The Actual AC Power Supply Distortion Image
But there are
several problems when using this method
to control LED and fluorescence lamp:
1. Lighting
flicker always, human eyes will feel
unwell after long time using.
2. Seriously reduce the service life
of transformer or ballast (the worst
situation, it will get a serious heat
damage with in
1 month).
3. High EMC problems, in Europe,
this dimmer is forbidden for LED lights
and lamps (Fluorescent) dimming (EMC
problems have affected other electrical
appliances after normal use).
DC control
dimmer (1-10VDC HF Ballast controllers)：
DC controlled
dimmer with a corresponding control port
and the electronic transformer LED lamp
and electronic ballast
fluorescent lamps (fluorescent) used in
conjunction. The principle is generated
by Dimmer 1-10V DC voltage, the voltage
LED lamps and electronic transformers
and electronic ballasts for fluorescent
lamps (fluorescent) coordination within
the
chip, resulting in 400-700Hz pulse (PWM)
to regulate the LED lights or
fluorescent lamps (fluorescent).
This control
method has a lot of advantages:
1. Will not
flicker always which could protect your
eyes.
2. Safe and
reliable, because a dedicated chip
control, and does not produce
high-temperature lead to product damage
3. Meet CE low
EMC, in Europe, only the DC-control
(1-10VDC HF Ballast controllers) dimmers
pass a stringent CE
certification test.
Related CE standard:
● RFI<30
MHz： EN
55015
● RFI>30
MHz： EN
55022 A
● Total
harmonic： EN
61000-3-2
●
Anti-jamming：
EN 61547
●
Safety：
EN 61347-2-3
4. Adjustable
lamp power as low as 3%.
5. Warm start: no
flickering, lamp life are not impacted
by open and close operation. Applied to
the place where the
lighting are opened and closed
frequently.
6. Life is 50%
longer than trditional ballast.
7. Use of automatic lighting control
system, 75% reduction in energy
consumption
8. Intelligent
dimming: light output constant, not
subject to supply voltage fluctuations
9. Do not affected by excessive
supply voltage or improper connection.
10. Dimming will
not affect the life of light source
11. Light source
works reliable when dimming.
12. Dimming
process, to achieve maximum energy
efficiency.
|
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|
Philips DC-control LED Transformer |
Philips DC-Controlled Ballasts for
Fluorescent Lamp |
|
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|
Osram DC-control LED Transformer |
Osram DC-Controlled Ballasts for
Fluorescent Lamp |
Super introduces
the DC-control dimmer this time, full
range of support for Philips and Osram's
range of LED lamps and
dimmable electronic ballasts for
fluorescent lamps. Please note that the
rational choice to use DC-controlled
dimmers which
are released by the Dutch Philips
lighting control experts, because of the
way other dimming control instability
and
unreliability, the use of non-DC
controlled dimmer device caused a
significant reduction in ballast life
has become the opposite
of energy saving materials.
Related the most
advanced DC-type dim transformer and
ballast:
Osram
Lighting：
http://www.osram.com.cn/osram_cn/
