Efficient LED solar lamp controller

Abstract

The controller includes following parts: signal processing and AD sampling circuit is in charging for converting the modulated terminal voltage signals of solar panel and storage cell, charging current signal, discharging current signal, and temperature signal into digital signals, which are sent to microprocessor; being composed of bidirectional DC-DC convertor of time-sharing multiplexing Buck-Boost, sampling circuit for current, drive circuit for power tube, and loop for switching charging and discharging circuits, main circuit implements charging storage cell, and discharging LED light fixture; being as operation interface between controller and user, man machine interface circuit responds user's operation information; being in charging coordination control of whole system, microprocessor is in charge of maximum power charging control, impulsive discharging control for LED light fixture, and response to user's operation and system protection.

Description

Technical field: [0001] The utility model relates to a high-efficiency LED solar lamp controller, which belongs to the electronic technical field. Background technique: [0002] With the deepening of the concept of energy conservation and environmental protection and the development of photovoltaic technology, solar lighting systems are increasingly applied to various occasions such as streets, courtyards, and tunnels. As a green and environment-friendly DC light source, LED has attracted people's attention due to its advantages of long life, fast response and low power consumption, and is widely used in solar lighting systems. [0003] The controller is the "heart" of LED solar lamps, which directly determines its working efficiency and performance. At present, known LED solar lamp controllers have time control and light control functions, the charging method is direct charging, and the driving method is direct driving or pulse driving. When the voltage of the solar panel...

AI Technical Summary

Problems solved by technology

[0004] Usually, the output power of a solar panel and its terminal voltage have a parabolic relationship, and it changes with light intensity and temperature. In the direct charging mode, the terminal voltage of the solar panel is embedded at about 12V by the battery, which has not been utilized to the maximum extent; In order to improve the charging efficiency, it is necessary to add a DC-DC converter between the battery board and the battery, and control the terminal voltage according to the real-time power characteristic curve of the battery board to achieve the maximum power output of the battery board. However, due to the complicated circuit and control Sexuality and high cost, most of the existing LED solar lamp controllers are not used

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