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
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 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
A study of parallel operations of active and passive filters
Tập 2 - Trang 1021-1026 vol.2
This paper reports investigations of the parallel operations of a current controlled active filter and passive filters in a system with current harmonic sources. The task of reactive power and harmonic compensation is shared by the active filter and passive filters. The passive filters are used for supplying reactive power to the connected AC system and eliminating some harmonics, the active filte......
#Passive filters #Active filters #Power harmonic filters #Power system harmonics #Reactive power #Power supplies #Impedance #Thyristors #Costs #Control systems
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
Estimation method of disturbances generated by a voltage diode rectifier in discontinuous mode in association with a LISN
Tập 4 - Trang 1785-1790 vol.4
Today, converters are more and more efficient. However, this increase in technology remains limited by the production cost. In spite off the rapid rise in the development of complex PFC systems, simple solutions are usually used. The voltage diode rectifier remains the easiest. The harmonic generation through an EMI filter or passive elements is one of its main problems. In order to understand the......
#Voltage #Diodes #Rectifiers #Production #Costs #Frequency conversion #Electromagnetic interference #Passive filters #Phase noise #Frequency domain analysis
A new three-input/output characteristics-varying filter in the D-module for direct processing of three-phase signals
Tập 3 - Trang 1413-1418 vol.3
This paper proposes a new three-input and three-output characteristics-varying filter in the D-module for direct processing of three-phase signals, which are becoming indispensable for effective active compensation of three-phase power such as harmonics current, negative phase current, reactive power and varying voltage compensations. The filter in the D-module can show different filtering charact......
#Signal processing #Power harmonic filters #Electronic mail #Power system harmonics #Reactive power #Voltage #Frequency
System clarification through systematic controller design for a forward converter with power factor corrector
Tập 3 - Trang 1083-1088 vol.3
A nonlinear controller is systematically designed on the basis of nonlinear model for a forward converter with power factor corrector. The systematic controller design clearly analyzes the behavior of a nonlinear system to improve the performance. It is clarified that a nominal load resistance characterizes the controller performance. Finally, computer simulations demonstrate efficiencies of the a......
#Control systems #Reactive power #Power system modeling #Control system synthesis #Nonlinear control systems #Voltage #Circuits #Steady-state #Switches #Nonlinear systems
A flying capacitor multilevel inverter with bootstrap-powered MOSFET gate drive circuits
Tập 2 - Trang 701-705 vol.2
The problem of nontechnical power loss due to theft of electricity experienced in developing countries is of great concern. This is done mainly by tapping of the overhead AC reticulation networks and bypassing of metering units. Applying DC reticulation at higher voltage levels using the existing AC reticulation networks is one approach to solving this problem. This paper aims at investigating the......
#Capacitors #Inverters #MOSFET circuits #Power supplies #Switches #Voltage control #Semiconductor device noise #Topology #Switching frequency #Insulated gate bipolar transistors
A novel direct torque control scheme for interior permanent magnet synchronous machine drive system with low ripple in torque and flux, and fixed switching frequency
Tập 2 - Trang 529-534 vol.2
A novel DTC control scheme for interior permanent magnet synchronous machines is proposed in this paper, which features low torque and flux ripple and almost fixed switching frequency, by means of space vector modulation (SVM). The torque and flux ripples have been significantly reduced if compared with those of the basic DTC reported in the literature.
#Torque control #Permanent magnet machines #Switching frequency #Machine vector control #Rotors #Inverters #Differential equations #Induction machines #Induction motors #Voltage control