MR16 led spotlight dimming in two types
The dimming of the MR16 spotlight is very important at present, because the MR16 spotlight is mainly used for local lighting, and it is very important to adjust the brightness of the light. However, because there are too many thyristor dimmers at present, and most of them are designed based on incandescent lamps, this brings difficulties to the dimming of LED lighting fixtures.
There are 3 common dimming methods for led spotlights
LED dimming power supplies include thyristor (previously called thyristor) dimming power supply, 0/l～10V dimming power supply, and PWM dimming main light power supply. Among them, thyristor dimming is the most widely used dimming method.
1. The current smart LED spotlight dimming system mainly includes the following:
>C-Bus. C-Bus, short for ClipsalBus, is the bus protocol of Clipsal. A two-wire twisted pair is used, that is, a pair of wires not only provides the working power of the bus equipment (DC 15V～36V), but also transmits the information of the bus equipment.
Dimming, if the ED thyristor power supply is used, the test must be carried out to prevent uneven dimming and flickering m. ②Dimming may not be displayed. Be sure to test multiple samples. Its thyristor dimming power supply parameters are the same as ordinary power supply is not much different, and mainly determines the dimming method.
Note:
At present, chip companies that produce LED thyristor dimming power supplies include NXP, Texas Instruments, iWatt, and so on.
2. Digital LED spotlight dimming
DALI is the abbreviation of Digital Addressable Lighting Interface. As part of the IEC 60929 standard, DALI provides communication rules for lighting components. DALI is a data transmission protocol, which defines the digital communication method between lighting appliances and system equipment controllers (such as sensors, gateways, etc.). It is not a new bus, but it supports open systems. The initial goal of designing and applying DAL is to optimize an intelligent lighting control system. The system has a simple structure, convenient installation, easy operation, and excellent functions. It can not only be used for lighting control in a room, but also can be combined with the building management system (BMS). ) Docking.
The commonly used DAII LED dimming driver dimmer is a (constant current type) driver with an output voltage of DC3~46V and an output power of 4.2~96.6W. The appearance and principle diagram of DALI dimming system are shown in Figure 2-10. It solves the problem of compatibility between fluorescent light dimming system and LED lighting, and realizes that many traditional lighting intelligent dimming systems can control LED lights, such as Lutron, Dynalite, Tridonic, Schneide, Clipsal, Osram, Philips, ABB and other lighting control systems.
Signal terminal DCl2～48V
ACl1220V crystal SEILV BL for DALI bus·
