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基于单片机的小功率逆变器的设计与实现 被引量:3
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作者 朱立为 蒋品群 廖志贤 《现代电子技术》 2012年第4期192-194,共3页
为了提高逆变器的整体性能,以STC12C5A60S单片机为核心,设计并实现了一个小功率逆变器。通过单片机直接产生脉宽调制波,控制功率开关器件组成的桥电路实现逆变。根据单片机对外部电位器上电压的采样值对输出电压的幅值进行控制,使得输... 为了提高逆变器的整体性能,以STC12C5A60S单片机为核心,设计并实现了一个小功率逆变器。通过单片机直接产生脉宽调制波,控制功率开关器件组成的桥电路实现逆变。根据单片机对外部电位器上电压的采样值对输出电压的幅值进行控制,使得输出电压幅度可调。采用数/模电路结合设计,使得逆变器的体积大大减小。硬件上的功能模块化设计,使整个系统的检测性和操控性大大加强。该逆变器电路简单,工作稳定可靠,且易于升级,具有较大的推广应用价值。 展开更多
关键词 逆变器 单片机 脉宽调制 功率开关器
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Multi-Phase QR ZCS Switched-Capacitor Bidirectional Power Converter for PV System Application
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作者 Yi-Pin Ko Yuang-Shung Lee Li-Jen Liu 《Journal of Energy and Power Engineering》 2012年第11期1869-1877,共9页
The multi-phase implementation in the QR (quasi resonant) ZCS (zero current switching) SC (switched capacitor) bidirectional DC-DC converter structure has been proposed to reduce current ripple, switching loss a... The multi-phase implementation in the QR (quasi resonant) ZCS (zero current switching) SC (switched capacitor) bidirectional DC-DC converter structure has been proposed to reduce current ripple, switching loss and significantly increase the converter efficiency and power density. This approach provides a more precise output voltage to obtain voltage conversion ratios from the double-mode versus half-mode to n-mode versus 1/n mode. This is accomplished by adding a different number of switched-capacitors and power MOSFET switches with a small series connected resonant inductor for forward and reverse schemes. The size and cost can be reduced when the proposed converter has been designed with the coupled inductors. The simulation and experimental results have been used to demonstrate the performance of the two-phase with and without coupled inductor interleaved QR ZCS SC converters for bidirectional power flow control application, and an extending structure for N-phase is mentioned. 展开更多
关键词 Quasi resonant zero current switching multiphase DC-DC converter switched capacitor bidirectional converter PVsystem.
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A novel PV sub-module-level power-balancing topology for maximum power point tracking under partial shading and mismatch conditions 被引量:1
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作者 Mustafa GOKDAG Mehmet AKBABA 《Frontiers of Information Technology & Electronic Engineering》 SCIE EI CSCD 2016年第12期1388-1396,共9页
Partial shading and mismatch conditions among the series-connected modules/sub-modules suffer from a nonconvex power curve with multiple local maxima and decreased peak power for the whole string. Energy transfer betw... Partial shading and mismatch conditions among the series-connected modules/sub-modules suffer from a nonconvex power curve with multiple local maxima and decreased peak power for the whole string. Energy transfer between the sub-modules brings them to the same operating voltage, and this collective operation produces a convex power curve, which results in increased peak power for the string. The proposed topology benefits from the switched-capacitor (SC) converter concept and is an application for sub-module-level power balancing with some novelties, including stopping the switching in absence of shading, string-level extension, and a reduced number of power electronics components as compared to those in the literature. Reduction in the number of power electronics components is realized by the fact that two sub-modules share one SC converter. This leads to reduced power electronics losses as well as less cost and volume of the converter circuit. Insertion loss analysis of the topology is presented. The proposed topology is simulated in the PSpice environment, and a prototype is built for experimental verification. Both simulation and experimental results confirm the loss analysis. This proves that with the proposed topology it is possible to extract almost all the power available on the partially shaded string and transfer it to the load side. 展开更多
关键词 Sub-module-level maximum power point tracking (MPPT) Differential power processing (DPP) Distributed power converters Switched-capacitor (SC) converters
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