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...... hiện toàn bộ
#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 ...... hiện toàn bộ
#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...... hiện toàn bộ
#Power integrated circuits #MOS devices #Voltage #CMOS technology #Charge pumps #Integrated circuit technology #Costs #Circuit topology #Power supplies #Geometry
Improved power converter line synchronisation using an adaptive Discrete Fourier Transform (DFT)
Tập 2 - Trang 821-826 vol.2
The problem of line synchronisation for grid connected power converters where the grid is weak or comes from a remote area power supply with poor frequency governing, is now well recognised. Such supplies can suffer a significant amount of line voltage distortion due to notches caused by power device commutation and/or low frequency harmonic content. This distortion can easily corrupt the output o...... hiện toàn bộ
#Discrete Fourier transforms #Voltage #Power harmonic filters #Frequency synchronization #Matched filters #Power supplies #Frequency conversion #Harmonic distortion #Power system harmonics #Detectors
On the reliability of distributed power systems: a macro- to microlevel overview using a parallel DC-DC converter
Tập 2 - Trang 809-814 vol.2
Using a parallel DC-DC power converter as an example, the authors outline the reliability issues of a distributed power system (DPS) at system, module, component, materials and fundamental (atomic) levels. The comprehensive approach proposed in this paper is an alternative to the traditional statistical/probabilistic approach to reliability analysis and fulfill the following goals. It will enable ...... hiện toàn bộ
#Power system reliability #Power electronics #DC-DC power converters #Hybrid power systems #Materials reliability #Power system analysis computing #Semiconductor device reliability #Power semiconductor switches #Solid state circuits #Semiconductor devices
Modelling of the PRC-LCC resonant topology with a capacitor as output filter using EDF
Tập 3 - Trang 1337-1342 vol.3
In this paper, the extended describing function (EDF) and the generalised averaging modelling techniques have been applied to a PRC-LCC resonant AC/DC power conversion topology with a capacitor as output filter. In this way, a mathematical large signal model has been obtained to describe the topology dynamic behaviour. This large signal model consists of a set of nonlinear differential equations w...... hiện toàn bộ
#Resonance #Topology #Capacitors #Filters #Power conversion #Mathematical model #Differential equations #Computational modeling #Convergence #Steady-state
A soft-switched series-resonant DC/AC inverter without auxiliary switches
Tập 2 - Trang 827-832 vol.2
A soft-switched series-resonant DC/AC inverter without auxiliary switches is presented. The inverter is configured by a full-bridge series-resonant inversion (FB-SRI) without cycloconversion and auxiliary switches. The inverter is a series resonator with four main switches to configure adaptively the output current suitable for impedance load. The output sinusoidal voltage is synthesized by a seri...... hiện toàn bộ
#Pulse width modulation inverters #Switches #Impedance #Circuits #Resonance #Zero current switching #Zero voltage switching #Nonlinear dynamical systems #Total harmonic distortion #Uninterruptible power systems
Delta operator digital filters for high performance inverter applications
Tập 3 - Trang 1407-1412 vol.3
Most infinite impulse response (IIR) digital filter implementations in power electronic inverter applications are based on the time shift operator q and its associated z-transform. But for higher sampling frequencies where the sample period approaches zero for z-transform discrete systems, their dynamic response does not converge smoothly to the continuous counterpart, causing substantial implemen...... hiện toàn bộ
#Digital filters #Inverters #Power electronics #Sampling methods #Frequency #Active filters #Digital control #IIR filters #Resonance #Regulators
Development of multiple output operation based on single stage switched-capacitor resonant converters
Tập 3 - Trang 1325-1330 vol.3
Power converters are commonly based on the switched mode techniques which use pulse-width modulation to control the converters. Switching loss and switching noise restrict high frequency operation such as more than 200 kHz. The resonant converter is a solution of the above problem. The resonant converter enables switching devices to operate under zero-current or zero-voltage switching. The main di...... hiện toàn bộ
#Resonance #Switching converters #Pulse width modulation converters #Switched capacitor circuits #Circuit topology #Pulse modulation #Switching loss #Frequency #Zero voltage switching #Inductors
Eddy currents in medium power switched reluctance machines
Tập 2 - Trang 979-984 vol.2
Switched reluctance machines are characterized by high local flux densities in the core, high current gradients in the windings and relatively large winding areas for the nondistributed windings. In particular, in medium-, high-power and high-speed machines these characteristics may lead to thermal problems. Hot spots in the windings are a result of losses, which originated from high-frequency alt...... hiện toàn bộ
#Eddy currents #Reluctance machines #Machine windings #Magnetic materials #Magnetic cores #Frequency #Costs #Magnetic fields #Induction machines #Conducting materials