2002 IEEE 33rd Annual IEEE Power Electronics Specialists Conference. Proceedings (Cat. No.02CH37289)
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Các bài báo tiêu biểu
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
Problems of paralleling windings for planar transformers and solutions
Tập 2 - Trang 597-601 vol.2
In today's power converters, paralleling windings in planar transformers is
common, especially for low voltage and high current applications. Although this
practice is usually believed to be an effective way to increase the current
handling capacity of the windings, the effect might not be so significant due to
the unequal current distribution within parallel layers if the layers are not
properly ...
#Transformers #Copper #Current distribution #Frequency #Inductance #Power electronics #Low voltage #Solids #Wire #Assembly
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
Industrial implementation of a controlled sensorless synchronous drive with hard start conditions
Tập 3 - Trang 1167-1171 vol.3
The subject of this paper is a synchronous drive of grinding ball mills 4 MW,
150 rpm, 6 kV, 50 Hz on the base of PWM CSI. The system is installed at the
concentrating plant of Norilsknickel in Russia. Specific to this drive is large
stalling torque-up to 125% of rated torque. This is a sensorless drive. Another
specific feature is the necessity of synchronization with power system and
switching t...
#Industrial control #Sensorless control #Torque #Power system simulation #Pulse width modulation #Synchronous motors #Milling machines #Frequency #Voltage #Automatic control
Development of a bi-directional DC/DC converter for inverter/charger applications with consideration paid to large signal operation and quasi-linear digital control
Tập 2 - Trang 961-966 vol.2
In this paper, a low-power bidirectional DC/DC converter for inverter battery
charger applications is considered. Initially, a galvanically isolated and
synchronously rectified DC/DC converter topology is prototyped and its
stationary performance evaluated. Next, a nonlinear dynamic model of the
converter is derived using a state space averaging method. The dynamic model is
nonlinear in the sense ...
#Bidirectional control #DC-DC power converters #Inverters #Digital control #Programmable control #Adaptive control #Batteries #Galvanizing #Topology #Prototypes
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
An analysis of a resonant half bridge dual converter operating in continuous and discontinuous modes
Tập 3 - Trang 1313-1318 vol.3
A half bridge dual converter has been previously shown to have operational
advantages in low input voltage applications as frequently found in photovoltaic
systems. This paper introduces a resonant version of this converter and analyses
its operation in a range of continuous and discontinuous resonance modes. The
new topology makes use of the transformer leakage inductance and the switching
device...
#Resonance #Bridge circuits #Photovoltaic systems #Capacitance #DC-DC power converters #Low voltage #Topology #Inductance #Rectifiers #Diodes
Sampling averaging for inverter control
Tập 4 - Trang 1699-1704 vol.4
Deadbeat controllers provide a fast response approach to control of inverters.
This has been extended to the control of high order filters for grid connected
inverters. These controllers use high gains on the errors measured at one sample
to control the errors to zero ideally by the next sample. One difficulty with
this controller is that the high gains can make the control very sensitive to
any e...
#Sampling methods #Inverters #Filters #Error correction #Gain measurement #Noise measurement #Switches #Noise reduction #Delay effects #Reactive power
Analysis of the effects of nonidealities of power components and mains voltage unbalance on the operating behavior of a three-phase/switch buck-type unity power factor PWM rectifier
Tập 4 - Trang 1607-1612 vol.4
According to the experimental analysis of a 5 kW wide input voltage range
three-phase three-switch buck-derived unity power factor PWM rectifier, the
ideally constant DC output current does show a low-frequency distortion for
open-loop control operation which is translated into low-frequency harmonics of
the mains current. This distortion cannot be eliminated completely by
closed-loop control sinc...
#Open loop systems #Pulse width modulation #Harmonic analysis #Reactive power #Rectifiers #Harmonic distortion #Voltage control #Power system harmonics #Power harmonic filters #Bandwidth