| Semiconductor lighting refers to using all-solid-state light-emitting device as a light source lighting. It is a product of the high-speed development of the semiconductor light-emitting materials technology and "green lighting", with a series of advantages such as high efficiency, energy saving, long lifetime, environmental friendly, easy to maintain, etc., It is one of the world’s most promising high-tech fields in recent years and a great light source innovations after incandescent, fluorescent in the human lighting history. In June2003, China began to launch a large-scale semiconductor lighting project. In2008, the China’s semiconductor lighting industry output value reached70billion RMB, and the industry output value is expected to reach150billion RMB in2015. Semiconductor lighting has a huge market and technology innovation space in a booming spring now. And it has a great significance of many aspects such as upgrading traditional lighting industry, developing the related industries, promoting social economy.First, several non-isolated DC-DC topologies and APFC commonly used control technology are researched and analyzed, such as the circuit structure principles, the different stages modal voltage and current characteristics, the PFC and total harmonic distortion THD, then APFC commonly used control technology such as the peak current control method, the average current control method is analyzed and its circuit structure principle, the dynamic control process, the respective characteristics and the needed improvement issues are studied. These works are the key entry point of semiconductor lighting driving control system improvement and optimization design and provide a good theoretical construction for the control system innovation. Subsequently, three new high efficient non-isolated high-power semiconductor lighting driving systems are proposed with requirements such as simplified structure, low cost, energy-saving, high efficiency, fast response, strong stability.1, A new driving method of the average current double loop control is proposed based on boost converter. The auxiliary inductor buffer circuit and function generator novel average current double-loop control method are adopted to create a new boost driving system on the basis of the traditional average current control. The new driving system based on auxiliary inductor and function generator novel current control is studied and designed including the control loop design and stability analysis. The system simulation demonstration is followed. The new control system eliminates the multiplier, without input voltage detection appeared in the traditional methods, the structure is simple, reliable, having a high power factor, a strong anti-interference and high output stability.2, A high-power-efficient optimization system is proposed on the basis of the buck-boost converter. Firstly, the main circuit structure principles and mode characteristics are researched and analyzed. Combined with the state space averaging method and voltage control system model method, a new buck-boost voltage mode control system with PID correction network is created by using theoretical and Ziegler-Nichols engineering setting methods of PID control technology. System simulation analysis is followed by the use of high performance software SIMULINK and SIMPOWERSYSTEMS. The results show that the optimized control system with PID network compensation technology improves the response speed, the system dynamic performance, the robustness greatly, and eliminates the steady state error, enhances the adaptability to the external environment changes.3, Based on the master control system in the CUK converter, a novel controlled realization method is presented. Its main circuit structure principles and operating characteristics are researched and analyzed firstly. Using a zero voltage conversion improvement strategies to reduce the switching power consumption, a new feed forward control driving system is built with a large signal, nonlinear dynamic control OCC technology. System simulation analysis is followed by the use of high performance software SIMULINK and SIMPOWERSYSTEMS, and its system dynamic working corresponding relationships are given. It has been verified that the new driving system has high system efficiency, high power factor, large improvement of anti-input disturbance and anti-load disturbance. Finally, a series of important reliability analysis of the semiconductor lighting control key devices including LED, MOSFET, fast recovery diode devices is made from the material structure, working dynamic performance. This plays a key role in control systems to reduce cost, improve system efficiency, enhance stability.The working results above have a great value and significance to further optimization and improvement of the semiconductor lighting driving system in the future. |
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