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Rotary Inductive Power Transfer for LED Lighting Systems
Chung-Chuan Hou,Chia-Ming Chang,Wei-Hsiang Cheng,Hsien-Ching Huang 전력전자학회 2019 ICPE(ISPE)논문집 Vol.2019 No.5
Rotary inductive power transfer (RIPT) systems have the advantages in wireless power transfer capability, unlimited angular position operation, and flexible light-emitting diode (LED) lighting application. Therefore, this study discusses the performances of RIPT for LED lighting systems in the frequency domain and time domain. The characteristics of the RIPT for LED lighting systems are measured under varied air gap, changed load, and so on. The simulation and experimental results are presented to validate the performances of the proposed scheme.
Common Mode Voltage Reduction in Four-Leg Inverter with Multicarrier PWM Scheme
Chung-Chuan Hou,Po-Wei Wang,Ching-Chen Chen,Chen-Wei Chang 전력전자학회 2019 ICPE(ISPE)논문집 Vol.2019 No.5
Three-phase three-leg inverter has an inherent common mode voltage (CMV) problem. Therefore, threephase four-leg inverter is presented to mitigate the CMV of the inverter. This study discusses the characteristics of multicarrier pulse width modulation (PWM) for threephase four-leg inverter. The multicarrier PWM scheme is utilized to reduce the CMV of the inverter. The analysis of sinusoidal PWM and space vector PWM with multicarrier is discussed. The experimental results are utilized to validate the performances of the proposed multicarrier PWM scheme.
Analysis and Comparison of EE-type and CC-type Cores for Wireless Power Transfer Systems
Chung-Chuan Hou,Yu-Hsiang Teng,Wen-Pin Chang,Kuei-Yuan Chang 전력전자학회 2015 ICPE(ISPE)논문집 Vol.2015 No.6
This study presents a wireless power transfer (WPT) system based on EE-type and CC-type ferrite cores. The push-pull converter is utilized to transfer the power to the secondary side load with a parallel resonant capacitor. The issues of the WPT such as efficiency and air gap are discussed. The analysis and comparison of the EE-type and CC-type cores based on test results is discussed.
An AC/DC Power System Consisting of a Diode Rectifier and an Auxiliary Three-Level Converter
Chung-Chuan Hou 전력전자학회 2011 ICPE(ISPE)논문집 Vol.2011 No.5
This study proposed an AC/DC power system consisting a diode rectifier and an auxiliary three-level converter. The diode rectifier load system is powered by AC grid and distributed generators (DGs) such as photovoltaic cells and micro turbines. The auxiliary three-level converter operates as an active filter when the load system does not get enough power from DGs. When the load system get excessive energy from DGs, the auxiliary three-level converter can transfer the energy back to the AC grid. If the AC grid is in an abnormal condition, the AC/DC power system is disconnected by switch and the DC load is powered by the DGs. Once the AC grid recovers, the AC/DC power system is reconnected by switch and the DC load is powered by AC grid and DGs. Simulation and test results are presented to validate the performances of the proposed AC/DC power system.