There is nonlinearity and variability between the outpu […]
There is nonlinearity and variability between the output voltage and current of the solar cell. There is a maximum 'power output point' in the specific environment and the voltage and current corresponding to the maximum power point. When the environment changes, the output characteristics of the solar cell are also changed. The characteristic curve of the output voltage and output current of the solar cell manufacturer's solar cell is shown in Fig. 2. In order to obtain as much electric energy as possible from the solar cell, the maximum power tailing problem of the solar cell is proposed. Common methods for maximum power point stalking control include constant voltage stalking method, disturbance observation method, conductance increment method, ambiguous logic control method, load current/voltage maximum method, etc. . According to the volt-ampere characteristics of the LED, in the positive conduction area of LE D, the small voltage fluctuation will cause a large change of current, so the selection of constant current drive is a plan.
LED equipment manufacturer's LED lighting art specific performance
The principle of LED illumination. The LED is made of a III-V compound such as GaAs (gallium arsenide), GaAsP (gallium arsenide), A1GaAs (aluminum gallium arsenide), etc., and its center is a PN junction, so it has a general PN junction. The characteristics of the volt-ampere, that is, the positive guide, the reverse cutoff, and the breakdown characteristics. When the P-type semiconductor is associated with the N-type semiconductor, there is a difference in carrier concentration at the interface. Therefore, electrons and holes are dispersed from a high concentration region to a low concentration region. Thus, one side of the P region loses negative ions that cannot be moved, and the electrons on the N-zone lose electrons and leave positive ions that cannot move. These charged particles that cannot move are space charges. The space charge gathers adjacent to the interface between the P and N regions, forming a very thin space charge region, which is a P-N junction. When a forward voltage is applied to the P-N junction. The dynamic balance of the P-N junction is changed. When a small amount of carriers (small children) are combined with most carriers (multiple sub-), the remaining energy is released as light, thereby directly converting the electric energy into light energy. If a reverse voltage is applied to the PN junction, a small amount of carriers (less children) are difficult to write, so they do not emit light.