From the 1890 Woodz inventive "safe dimmer", greatly inspiring people's curiosity of dimming and exploration of dimming technology, In 1961, Joel Pilates invented the solid dimmer. He used the gate flow pipe to replace the parametric used in the prior safety dimmer, overcome the electrical energy converted into heat rather than converted into a light deficit in the electric lamp, and passed through the medium-discharged The electric power of the light is dimmed so that the dimension of the dimmer is reduced to the extent of the standard wall box, and several early dimmers are briefed.
connects the resistance string in the middle of incandescent light source and power supply, changing the resistance value to adjust the current in the source to achieve dimming destination. Its disadvantage is that the energy consumption is much, the efficiency is low, the volume is large, and the advantage is that the DC power supply can be used without radio interference. It can be used in laboratory, teachon demonstrations and ship navigation equipment.
a self-adjusted transformer. The secondary voltage is changed by adjusting the contact position of the coil wound from the transformer iron yoke. It has a small energy consumption and high efficiency, and increases the load in the rated power does not affect the dimensions of the dimming level. The disadvantage is that it is only suitable for AC power, cumbersome, more colored and black metals, and cannot be controlled long distances.
Magnetic ammonial resistor
Change the sensing of the AC windings by changing the size of the current in the DC windings on the iron yoke. It has good dimming performance and is convenient, but the volume is large and cumbersome, has been replaced by the electronic dimmer.
Early with a gate tube as a switching element, then uses a controllable silicon element. This dimmer has the advantages of light weight, small size, high efficiency, easy distance manipulation, and so on. It has laid the foundation of modern dimming switches. Its disadvantages are if they do not take effective filtering measures, radio interference will occur, and the gas discharge light source such as fluorescent lamps, high-strength gas discharge lamps, etc., dimming is difficult to achieve. The dimmer of the high-power transistor or field effect tube can overcome this disadvantage.
The dimming switch has been developed, which has a wide variety, complete specifications, and can be classified according to the operation mode and dimming mode.
1. Dimming switch is divided into:
1) knob dimming switch
2) Touch dimming switch
3) Button Tunction Switch
4) Remote Dim Switch
5) Induction Dim Switch
Second, dimming switch Press dimming mode To:
thyristor tunue switch
PWM dimming switch
0-10V dimming switch
thyristor dimming switch
The dimming switch can meet the different needs of the light brightness at different times, and can directly replace the existing wall switch. Applicable to public places such as family room, apartment, hotel, hospital. With the improvement of living standards, people are inseparable from light, and they are not inseparable from the quality of the light. The demand for dimming can be substantially divided into three categories: functional regulating light, such as entry, meeting room, etc.; 2) The comfort and life style in home life, such as the light of the light, color temperature Warm and warm, can be adjusted according to the needs of the environment, or the role of a trust atmosphere; 3) The needs of environmentally friendly energy saving, such as the energy saving demand in public places. Such as parking lot lighting, shopping mall lighting, road lighting, etc.
Energy saving lamp is divided into two: one is integrated, this energy-saving lamp is generally a lamp head that is a screw, which is convenient for an incandescent lamp. This is a built-in ballast in the bulb that cannot be dimmed. It will be problematic with the ability to modulverted knob switches. The other is the split, that is, the lamp is to be inserted into a separate ballast. The ballast is divided into two, inductive and electronics. This type of energy-saving lamp lamp is mainly a needle, generally two, a two-needled, a four-needle. The two-needle type is a built-in trigger (starting device of the light source), which can only be connected to the inductance ballast, and certainly cannot be dimmed. The four-needle can be connected to the electronic ballast. Professional energy-saving lights are to be equipped with electronic ballasts, and is the dimming electronic ballast. This ballast has two control voltage interfaces. There are mainly 1-10V control, and digital. In summary, energy-saving lamps must be selected: four-needle energy-saving light source + electronic dimming ballast (1-10V, digital) + dimming switch (1-10V) simulation or number of formulas.