A5070632272- Advanced DC-DC Converters
- Multilevel Inverters and Converters
- Microgrid Control and Optimization
- Photovoltaic System Optimization Techniques
- Silicon Carbide Semiconductor Technologies
- Advanced Battery Technologies Research
- Power Systems and Renewable Energy
- Electromagnetic Compatibility and Noise Suppression
- Electric Motor Design and Analysis
- Wireless Power Transfer Systems
- Real-time simulation and control systems
- Islanding Detection in Power Systems
- Microbial Inactivation Methods
- Analog and Mixed-Signal Circuit Design
- Sensorless Control of Electric Motors
- GaN-based semiconductor devices and materials
- Magnetic Bearings and Levitation Dynamics
- solar cell performance optimization
- Power Quality and Harmonics
- Impact of Light on Environment and Health
- HVDC Systems and Fault Protection
- Color Science and Applications
- Electrostatic Discharge in Electronics
- Wind Turbine Control Systems
- Radiation Effects in Electronics
National Chung Cheng University
2002-2025
National Taiwan University
2015-2024
Taipei Veterans General Hospital
1999-2024
Northeast Forestry University
2024
National Taipei University
2019-2024
National Taipei University of Technology
2023
National Yang Ming Chiao Tung University
1999-2018
Taipei Medical University
2014
Bureau of Energy
2014
Taichung Veterans General Hospital
2009
This paper proposes a boost converter with coupled inductors and buck-boost type of active clamp. In the converter, active-clamp circuit is used to eliminate voltage spike that induced by trapped energy in leakage inductor inductors. The switch can still sustain proper duty ratio even under high step-up applications, reducing current stresses significantly. Moreover, since both main auxiliary switches be turned on zero-voltage switching, switching loss reduced, conversion efficiency...
The objective of this paper is to propose a novel multi-input inverter for the grid-connected hybrid photovoltaic (PV)/wind power system in order simplify and reduce cost. proposed consists buck/buck-boost fused dc-dc converter full-bridge dc-ac inverter. output characteristics PV array wind turbine are introduced. perturbation observation method used accomplish maximum point tracking algorithm input sources. operational principle explained. control circuit realized by using digital signal...
The objective of this paper is to propose a general approach for developing multi-input converters (MICs). derived MICs can deliver power from all the input sources load either individually or simultaneously. By analyzing topologies six basic pulsewidth modulation (PWM) converters, method synthesizing an MIC inspired by adding extra pulsating voltage current source PWM converter with appropriate connection. As result, cells (PVSCs) and (PCSCs) are proposed deriving MICs. According presented...
A multi-input DC/DC power converter based on the flux additivity is proposed in this paper. Instead of combining input DC sources electric form, combines magnetic form by adding up produced together core coupled transformer. With phase-shifted pulsewidth-modulation (PWM) control, can draw from two different and deliver it to load individually simultaneously. The operation principle has been analyzed detail. output voltage regulation flow control be achieved PWM control. prototype with...
A novel double-input pulsewidth-modulation (PWM) dc/dc converter for high-/low-voltage sources is proposed in this paper. With a PWM control scheme, the can draw power from two different voltage simultaneously or individually. The operation modes and steady-state analysis of are introduced detail. scheme flow balancing also presented. By using single passive lossless soft-switching cell, switching losses all switches be reduced significantly. Finally, experimental measurements demonstrated...
A multi-mode operation for the three-phase photovoltaic (PV) power system with low-voltage ride-through (LVRT) capability is proposed. With proposed control strategy, active from PV arrays can be continuously extracted by interleaved boost converter during LVRT, whereas maximum point tracking quickly achieved after grid fault clearance. In addition, multi-channel increase conversion efficiency while decreasing input current ripple. On other hand, amplitude limitation of inverter provide...
Genome-wide association studies (GWAS) have mapped risk alleles for at least 10 distinct cancers to a small region of 63 000 bp on chromosome 5p15.33. This harbors the TERT and CLPTM1L genes; former encodes catalytic subunit telomerase reverse transcriptase latter may play role in apoptosis. To investigate further genetic architecture common susceptibility this region, we conducted an agnostic subset-based meta-analysis (association analysis based subsets) across six 34 248 cases 45 036...
This paper presents the calculation of optimum installation angle for fixed solar-cell panels based on genetic algorithm (GA) and simulated-annealing (SA) method. The output power panel is highly affected by sunlight incident its efficiency can be improved if properly installed with angle. relationship between radiation intensity surface also presented in this paper. Both GA SA climatic data are utilized to calculate different locations Taiwan. best monthly annual angles obtained computer...
The objective of this paper is to propose a new method detect the rise equivalent series resistor in order realize online failure prediction electrolytic capacitor for LC filter switching-mode power converter. Characteristics capacitors are introduced paper. Different experimental measurements conducted and shown illustrate properties capacitors. proposed has merits low cost circuit simplicity. It can be integrated within package improve its reliability. Hardware results verify performance method.
In this paper, a sequential color light emitting diode (LED) backlight driving system for liquid crystal display (LCD) panels is proposed. Due to improvement on luminous efficacy, long life and wide gamut, LED has gradually substituted cold cathode fluorescent lamp as backlight. The proposed adopts scanning scheme improve utilization efficiency by removing filter. To meet performance requirement that chromaticity variation Deltauv needs be limited below 0.002, paper also proposes family of...
In this paper, a multistring light-emitting diode (LED) backlight driving system for liquid crystal display (LCD) panels with color sequential (CSD) and area control is proposed. large-scale LCD panels, LED backlights are required to provide sufficient back lighting. The most popular structure achieve current regulation mirror. However, it cannot be applied high-power (>100 mA) driving, the number of LEDs in each string highly limited. system, multioutput flyback converter associated novel...
In this paper, a buck-type power converter as the battery charger for stand-alone wind system is proposed. The proposed can harvest maximum from turbine while generating pulsating current bank to improve charging efficiency. point tracking function realized by constant on-time control, circuit parameter design of converter, and characteristics turbine. implemented discontinuous conduction mode operation converter. Also, overspeed protection be naturally achieved when high output occurs....
This paper proposes the modeling and controller design of an autonomous PV module (APVM) which is composed a panel four-switch buck-boost converter (FSBBC) for series-connected distributed maximum power point tracking (DMPPT) system applications. The FSBBC can operate in buck, boost, modes with less passive component counts noninverted output voltage polarity. switching strategy smooth transition during mode change explained. parameter criteria small-signal ac model APVM are developed....
The objective of this paper is to propose a novel photovoltaic (PV) micro-inverter with PV current decoupling (PVCD) strategy achieve maximum power point tracking (MPPT) performance without using large electrolytic capacitors. Conventionally, the grid-connected needs PV-side capacitor suppress double-line frequency voltage ripple, which caused by injected ac grid power, desired MPPT performance. However, short lifetime will reduce micro-inverter's reliability dramatically. Therefore,...
The objective of this paper is to propose a simplified reactive power control (SRPC) strategy for single-phase grid-tied photovoltaic (PV) inverters. With the proposed SRPC strategy, cost-effective microcontroller can be adopted achieve an effectively control. Moreover, current-mode asynchronous sigma-delta modulation (CASDM) enhance current control's dynamic response and reduce both harmonic distortion electromagnetic interference. In paper, operational principle introduced. Then, small...
The objective of this paper is to propose the development a multiinput dc-dc converter (MIC) family, which composed isolated and/or nonisolated converters. By analyzing five basic converters, four pulsating voltage source cells and three current are generated. Moreover, semiisolated (S-MIC) for hybrid PV/wind power charger system can simplify system, reduce cost, deliver continuous power, overcome high-voltage-transfer-ratio problems proposed. In paper, operational principle proposed S-MIC...
The objective of this paper is to propose a three-phase back-to-back active power conditioner (APC) with dc-link voltage control strategies for microgrid applications. demanded and reactive powers the APC via bidirectional flow can help regulate frequency microgrids achieve high stability. Moreover, capacitor necessary component decoupling balancing. In order provide ability improve quality stability as well reduce capacitance, two methods are developed: 1) optimal ac-line current regulation...
This paper proposes a line current distortion compensation method, which is fusion of the conventional variable on-time (VOT) control and average mode (ACM) control, for DCM/CRM boost PFC converter with zero switching (ZCS)/zero voltage (ZVS)/valley (VS)/switching frequency limitation (SFL) functions. In this paper, mathematical analyses ZCS/ZVS/VS/SFL functions are also derived to explain causes distortion. order increase efficiency, ZVS/VS/SFL needed but will be further distorted. To...
The objective of this paper is to propose a bidirectional single-stage grid-connected inverter (BSG-inverter) for the battery energy storage system. proposed BSG-inverter composed multiple buck-boost type dc-dc converters (BBCs) and dc-ac unfolder. Advantages include: power conversion, low dc-bus voltages, pulsating charging/discharging currents, individual control each module. Therefore, equalization, lifetime extension, capacity flexibility system can be achieved. Based on developed...
Interleaving control schemes are widely used in converter applications. Merits of such methods reducing input/output current or voltage ripples and volume, increasing the processed power capacity converters. For converters with constant frequency operation, it is easy to achieve interleaving control. However, difficult realize features variable as boost-type factor correctors (PFCs) operated critical-mode (CM) condition. This paper proposes several phase shifters for CM boost PFCs. Analysis...
The ac line current regulation strategy for the grid-connected photovoltaic (GCPV) system is proposed in this paper. power flow of GCPV and operational principles different strategies are presented. In paper, optimal defined to be able achieve dc-link voltage one 60 Hz mains cycle while minimizing injected variation. mathematical equations derived thoroughly. also explain behavior responding variation system. As a result, selection criteria capacitor can established. Hardware experimental...
The objective of this paper is to propose a seamless grid-connected inverter (SGI) for microgrid applications. proposed SGI able operate in the mode or standalone mode. In order smooth transfer transition from and isolate grid fault immediately via static switch, three strategies are developed: 1) predetermined sinusoidal waveform detection (PSWD); 2) fast commutation current compensation (FCCC); 3) predictive voltage control (PTVC). PSWD strategy predict normal utility detecting few...
Purpose Verbal communication is the most immediate way of expressing oneself and fastest to make a first impression on others. However, for individuals with cerebral palsy (CP), which generally accompanied by speech impediments, verbal can present major hurdle social interactions.
The objective of this paper is to propose a new approach for designing passive LC filter the full-bridge rectifier by using genetic algorithms (GAs). performance cost-effective constant load depends on appropriate inductor and capacitor selection. Several design methods are reviewed novel methodology GAs proposed in paper. By GA program, designer can quickly find parameter values meet desired circuit performance. Experimental results show that an combination selected program power quality...
A multiinput converter for photovoltaic (PV) power system applications with factor correction (PFC), maximum point tracking (MPPT), and ripple-free input currents (RFIC) is proposed in this paper. With phase-shifted pulse-width-modulation (PWM) control, the can draw from utility line PV arrays individually or simultaneously deliver it to load. In addition, an almost unity MPPT also be achieved. Moreover, upper switches of each input-stage circuit are operated zero-current-switching (ZCS) at...