Application of Piezoelectric-Transformer-Based Resonant Circuits for AC LED Lighting-Driven Systems With Frequency-Tracking Techniques
作者： Shyh-Jier Huang , Tsong-Shing Lee , Peng-Yuan Lin
关键词: Resonant inverter 、 Electrical engineering 、 LC circuit 、 Transformer 、 Engineering 、 LED lamp 、 Alternating current 、 RLC circuit 、 Inverter 、 Electronic engineering 、 Electronic circuit
摘要: This paper proposes an application of piezoelectric transformer (PT) based inverters for alternating current (ac) light-emitting diode (LED) lighting-driven systems with a new resonant topology and frequency-tracking technique. proposed architecture comprises full-bridge phase-shift inverter PT-based C-L-C series circuit, ceramic transformers, microwinding to extend the range operation frequency, hence achieving two-terminal voltage drive ac LED arrays while stabilizing characteristics. In this system design, mechanism is also integrated into field-programmable gate array controller improve efficiency. Since only secondary required controller, circuit implementation simple additional sensor devices can be largely saved. Moreover, by considering that frequency-gain characteristics PTs may affected due temperature changes; designed adjust frequency swiftly in order restrict effect. method has been verified on modular lighting systems. Test results confirm feasibility applications.
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