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
A novel winding coupled-buck converter for high-frequency, high step-down DC/DC conversion
Tập 2 - Trang 651-656 vol.2
The buck converter is popularly used for stepdown DC/DC conversion when there is
no isolation requirement. However, for high step-down, large output current
applications such as voltage regulation modules (VRMs), it is no longer
suitable, especially at high switching frequencies. The too-small duty cycle and
large switching-related loss limit its performance. This paper proposes a novel
topology, ...
#Switches #Voltage #Buck converters #Switching frequency #Microprocessors #Transient response #Stress #Circuit topology #Inductors #Power supplies
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
A self-tuning regulator for induction machine vector control
Tập 3 - Trang 1463-1468 vol.3
In a vector controlled induction machine drive, accurate knowledge of the
machine electrical parameters is required to ensure correct alignment of the
stator current vector relative to the rotor flux vector, to decouple the flux
and torque producing currents and to tune the current control loops. This paper
presents a new method for online identification of the induction machine
parameters require...
#Adaptive control #Induction machines #Machine vector control #Frequency estimation #Recursive estimation #Torque control #Stators #Electric current control #Current control #Tuned circuits
A battery ZVT bi-directional charger for uninterruptible power supplies
Tập 4 - Trang 1841-1846 vol.4
This paper proposes a ZVT auxiliary commutation circuit applied to a universal
input AC-DC system with a bi-directional converter for a DC bus and battery bank
interface. With the bi-directional converter it is possible to reduce the cost
of the battery bank and virtually to eliminate both low and high frequency
current ripple in the batteries. The proposed auxiliary commutation circuit
controls t...
#Batteries #Bidirectional control #Uninterruptible power systems #Costs #Control systems #Diodes #Analog-digital conversion #Frequency conversion #RLC circuits #Resonance
Parallel three-phase UPS inverters with a new control technique
Tập 2 - Trang 905-908 vol.2
This paper presents a new control technique which allows the parallel operation
of two three-phase UPS modules, this scheme can achieve excellent
characteristics both in steady states and in transient states. Experiments are
presented to verify the theoretical discussion with two three-phase 60 kVA UPS
modules employing TMS320F240.
#Uninterruptible power systems #Inverters #Voltage #Reactive power control #Reactive power #Power system reliability #Frequency synchronization #Phase locked loops #Equivalent circuits #Steady-state