Common problems and solutions in LED lighting dimming
Dimming is a complicated vocabulary for designer friends: some friends think he is a strange field, some equate dimming with headache and trouble, and some are easy to apply.
Today, let's talk about dimming: the initial meaning of dimming is to change the brightness of the light emitted by the light source.
In the beginning, the dimming of electric lamps was only in the form of varistor. I believe that everyone must be very familiar with the "light bulb" and "sliding rheostat" in physics class.
Although changing the resistance can dim the light, it also brings a lot of heat loss.
However, in 1959, an epoch-making invention was born. Mr. Joel Spira, an American-Jewish scientist, applied the thyristor technology to the lighting field at one time, and invented a solid-state electronic dimmer for human beings.
Capridimmer Pictures
It is with dimming as the basis that people have invented a lighting control system (LCS: lighting control system) that can complete complex logic.
The light environment of a space can now be completely controlled by humans:
bright
dimmed
However, in reality, it is not easy to achieve the effect of dimming well. For example, the lamp itself is like a car, dimming is driving the car, the dimming device is the driver, and the dimming method is the driver's license. Let's use this example and continue talking.
We often encounter the following problems in dimming:
In summary, these adverse effects are attributable to one or more of the following reasons:
Do not choose the appropriate dimming method VSC1 driver's license to drive the bus
Not paired with a suitable high-quality dimming system VS the driver is a novice
Not installed according to the specifications of the dimming system VS starting without releasing the handbrake
Not choosing a high-quality drive VS the performance of the car itself is not good
Now let's talk about what dimming methods are there (what types of driver's licenses are there in the field of dimming and what kind of cars they can drive)
At the same time, don't forget: the switch is also a dimming method! (A total of 10 lights, numbered 1~10, the odd-numbered lights are turned off at night, and the even-numbered lights are left on)
From simple to complex, each dimming method (driver's license) must have a corresponding dimming device. Their detailed introductions are as follows:
On/Off Switching Module
Control "non-dimmable" lamps
Different light sources can be connected to one circuit
The total power of each loop cannot exceed the high load of the module, such as 10A (2200W)
The modules are generally installed in the power distribution room
Modules can be connected to other devices for intelligent control
Phase Dimming Module
Direct control of dimmable lamps, mostly used in renovation projects
Each circuit can only be connected to a single light source
Need to differentiate between front/rear cut drives
The total power of each loop must not be less than and exceed the lesser and higher loads of the module
The average dimming effect is lower than the difference in pressure technology, generally 25-100%
The modules are generally installed in the power distribution room
Connect other devices for smart control
0-10v Dimming Module0-10v Dimming Module
Dimming fixtures with "0-10v" driver
Each circuit can only be connected to a single light source
The total power of each loop cannot exceed the high load of the module, such as 10A (2200W)
There is no standard for dimming effect, the better one can reach 10-100%
0-10v control line length is generally <100m
It is recommended to connect no more than 20 lamps per circuit
The modules are generally installed in the power distribution room
Can be connected to other devices for intelligent control
DALI Digital Control ModuleDALI Digital Control Module
Dimming luminaires with DALI drivers
Each DALI link can connect up to 64 different lamps, and control the lamps in groups
The drive of the DALI is powered directly by the distribution box
Dimming effect is not standard
The length of the control line of the DALI connection is generally <300m
The modules are generally installed in the power distribution room
Connect other devices for smart control
Later, let's compare various dimming methods:
Today's sharing is here, I hope it will help you. The design of dimming and control systems is a very interesting art.
