2002 IEEE 33rd Annual IEEE Power Electronics Specialists Conference. Proceedings (Cat. No.02CH37289)
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A 1/spl phi/3W grid-connection PV power inverter with partial active power filter
Tập 3 - Trang 1512-1517 vol.3
This paper presents a single-phase three-wire (1/spl phi/3W) grid-connection photovoltaic (PV) power inverter with a feature of a partial active power filter (PAPF), which can not only deal with PV power but can filter current harmonics and improve power factor. Once the processed power exceeds the switch ratings, the inverter can reduce its output reactive power and harmonic power, while still ca......
#Inverters #Active filters #Power harmonic filters #Reactive power #Power system harmonics #Switches #Power generation #Photovoltaic systems #Solar power generation #Phase detection
An instructional laboratory for the revival of electric machines and drives courses
Tập 2 - Trang 455-460 vol.2
This paper describes the developments at the University of Minnesota of new approach in teaching of electric drives, focusing on the associate state-of-the-art laboratory. The mission of these developments is to nationally revitalize courses in industrially and strategically vital fields of electric drives (and power electronics). This is accomplished by making these courses appealing to students ......
#Laboratories #Electric machines #Power electronics #Drives #Continuing education #Digital control #Hardware #Electronics industry #Electric motors #Voltage
Power integrated circuit drives based on HV NMOS
Tập 4 - Trang 1737-1740 vol.4
This paper presents high voltage (HV) NMOS based level shifters, bootstraps and charge pumps in direct and cascaded topologies, which are highly useful to implement either power integrated circuits (PICs) high-side transistor floating drives or compact inductorless DC-DC power supplies. Monolithic solutions resorting to a unique HV NMOS switching cell are very important when standard CMOS technolo......
#Power integrated circuits #MOS devices #Voltage #CMOS technology #Charge pumps #Integrated circuit technology #Costs #Circuit topology #Power supplies #Geometry
An efficiency improvement of the active snubber boost converter for low power
Tập 2 - Trang 437-440 vol.2
The efficiency improvement applied to the minimum-external-component-count active snubber boost converter by a new timing diagram is presented. The ZCS condition occurs over the auxiliary switch at the turn on state. The main switch achieves ZVS turn on condition. The effectiveness of the proposed control-timing diagram soft-switching active snubber boost converter is verified experimentally.
#Snubbers #Switches #Inductors #Circuits #Diodes #Zero voltage switching #Capacitance #Power engineering and energy #Zero current switching #Switching converters
Inverters for single-phase grid connected photovoltaic systems-an overview
Tập 4 - Trang 1995-2000 vol.4
An overview on developments and a summary of the state-of-the-art of inverter technology in Europe for single-phase grid-connected photovoltaic (PV) systems for power levels up to 5 kW is provided in this paper. The information includes details not only on the topologies commercially available but also on the switching devices employed and the associated switching frequencies, efficiency, price tr......
#Inverters #Photovoltaic systems #Topology #Voltage #Switching frequency #Switches #Power engineering and energy #Australia #Power system economics #Power generation economics
Grid current regulation of a three-phase voltage source inverter with an LCL input filter
Tập 3 - Trang 1189-1194 vol.3
Many grid connected power electronic systems, such as STATCOMs, UPFCs and distributed generation system interfaces, use a voltage source inverter (VSI) connected to the supply network through a filter. This filter, typically a series inductance, acts to reduce the switching harmonics entering the distribution network. An alternative filter is a LCL network, which can achieve reduced levels of harm......
#Current control #Inverters #Power harmonic filters #Inductance #Harmonic distortion #Power electronics #Automatic voltage control #Distributed control #Switching frequency #Control systems
Smart power device targeted to educational purposes
Tập 2 - Trang 473-478 vol.2
This paper presents the tools and methodology used to introduce students to the problem of smart power design, resorting to low cost standard technologies. The theoretical support is envisaged to provide the required knowledge to specify characteristics and performance of the most common blocks used in smart power and to develop skills to implement them in integrated form. Through design, layout, ......
#CMOS technology #Power integrated circuits #Circuit topology #Integrated circuit technology #Circuit testing #Routing #Costs #Code standards #Telecommunication standards #Circuit simulation
Investigation of the effects of the control parameters and outputs on power factor of switched reluctance motor drive systems
Tập 3 - Trang 1469-1474 vol.3
In this paper, the authors study the effects of the control parameters and outputs of SRM drive systems on power factor through theoretical, simulation and experimental analyses. The control parameters and outputs include turn-on angle, turn-off. angle, input voltage, duty cycle of PWM, speed and torque. The analyses are carried out at three operation modes of SRM drives with voltage source, i.e.,......
#Reactive power #Pulse width modulation #Reluctance motors #Reluctance machines #Load flow #Analytical models #Torque control #Voltage control #Control systems #Drives
Efficient high power factor single-stage AC/DC converter
Tập 3 - Trang 1143-1148 vol.3
A near flat-top input current waveform and direct energy transferring AC/DC converter which features high efficiency and high power factor is described. In the proposed converter, energy transfers in hybrid mode which means that when the instant line voltage exceeds the preset value, energy is transferred directly to the output side from the input line; otherwise the energy storage capacitor power......
#Reactive power #DC-DC power converters #Switches #Flyback transformers #Topology #Inductance #Energy storage #Capacitors #Magnetic switching #Analog-digital conversion
A nonlinear control scheme for independent stabilization of a parallel multi-phase boost converter by blocking pure zero-sequence current
Tập 3 - Trang 1401-1406 vol.3
We propose a nonlinear controller, developed in a synchronous frame, for a parallel three-phase boost converter consisting of two modules. The basic idea, however, can be extended to a system with N modules. Each of the closed-loop power-converter modules operates asynchronously without any communication with the other module. The controller stabilizes the currents on the dq axes by blocking the f......
#Communication system control #Pulse width modulation #Power electronics #Power engineering and energy #Laboratories #Power engineering computing #Power system reliability #Power supplies #Steady-state #Vibrations