LED spotlights can only be driven by direct current, and no alternating current or voltage can be applied to both ends of the LED spotlights.
Jun 11, 2021
LED spotlights are widely used, let’s analyze and see
The analysis shows that, compared with incandescent lamps, the payback period of LED spotlights is 1.7 to 3.4 years; compared to halogen lamps, the payback period of LED spotlights is 1.7 to 3.5 years. Therefore, instead of incandescent lamps and halogen lamps, the application of white light LED spotlights has a very attractive rate of return on investment. However, the existing power supply system usually uses 120V or 220V alternating current.
On the other hand, because the LED spotlight source itself consumes low power, the power consumption of the matched LED spotlight control device in the rated state must be calibrated to meet the conditions of various safety regulations, and the LED spotlight control device also needs Assess the power factor when it is combined with the LED light source when working at the rated voltage and frequency. In view of the inherent characteristics of the switching power supply, the power consumption of the high power factor drive of the department is close to the matched LED spotlight products. Therefore, when the LED spotlight source is preset, the energy efficiency of the LED spotlight control device should be paid attention to. Level, taking into account the power factor of the line appropriately. At the same time, the dimming or control of the LED spotlight drive is also a hot spot of the driving technology at this stage. According to the needs of different application scenarios, the switch of the LED spotlight lamp should be controlled, or the luminous flux output of the LED spotlight lamp should be adjusted. At this stage, the main research content of LED spotlight driving technology is to improve the control accuracy, improve the power factor, and reduce the power consumption of the driver.
With the improvement of LED spotlight technology, the appearance of power saving effect, and the reduction of cost, both in the international market and the domestic market, LED spotlights have begun to enter the commercial lighting or even the sectoral household lighting market, showing a good momentum of development. Wide application prospects for indoor lighting LED spotlights are still very expensive at this stage, but because LED spotlights have higher luminous efficiency, they can reduce power consumption costs, and have a longer life span, which can reduce replacement and maintenance costs. Therefore, when considering the development direction of indoor lighting for white light LED spotlights, the return on investment of white light LED spotlights is the most important consideration compared to traditional lighting methods.
The first is the problem that the driver does not understand. LED spotlights can only be driven by direct current, and no alternating current or voltage can be applied to both ends of the LED spotlights. At the same time, in order to obtain high-quality lighting effects and make the LED spotlight output stable and long-life luminous flux, the input current of the LED spotlight must be constant.
