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
Coupled nondissipative snubber fed single-stage AC/DC converter for simple low power level power supply application
Tập 3 - Trang 1101-1106 vol.3
This paper presents a new single-stage forward converter with a magnetic coupled
nondissipative snubber, which gives good power factor correction (PFC), low
current harmonic distortion and tight output voltage regulation. The proposed
converter features the low switch current stress and the low switch voltage
stress, essential for the design of a single-stage power factor correction
converter. The...
#Snubbers #DC-DC power converters #Power supplies #Switches #Couplings #Power factor correction #Switching converters #Stress #Harmonic distortion #Voltage control
A new buck-boost-operation-based sinusoidal inverter circuit
Tập 4 - Trang 1624-1629 vol.4
This paper proposes a novel sinusoidal inverter circuit. The performance of this
inverter circuit is based on buck-boost operation, as it is well known in a DC
chopper circuit. The proposed inverter has a distinguished feature of step-up
and step-down output voltage. The sinusoidal output voltage of the inverter is
obtained by using a hysteresis-comparator scheme. The behavior of the inverter
circ...
#Circuits #Pulse width modulation inverters #Voltage #Inductors #Solar power generation #Power generation #Wind energy generation #Rectifiers #Computer simulation #Power conversion
Development of ZVS single-stage isolated converters with a PFC feature based on asymmetrical half-bridge topology
Tập 3 - Trang 1363-1368 vol.3
In this paper, a systematic approach to developing a family of zero voltage
switching (ZVS) isolated single-stage converters with a PFC feature based on
asymmetrical half-bridge topology is presented. The single-stage converters are
developed by adopting the synchronous switch scheme, and they can achieve
constant frequency operation, ZVS and low voltage stress imposed on the active
switches. More...
#Zero voltage switching #Switches #Switching converters #Costs #Stress #DC-DC power converters #Pulse width modulation converters #Reactive power #Switching loss #Power system harmonics
A modified dead-beat control for UPS using disturbance observers
Tập 4 - Trang 1618-1623 vol.4
A digital control technique for the inverter stage of uninterruptible power
supplies (UPSs) is proposed, which is based on a predictive regulator on both
output voltage and inductor current. Its aim is to achieve a dead-beat dynamic
response for the controlled variables (output voltage and inverter current).
Besides the linear state feedback which allocates system poles at the origin so
as to achi...
#Uninterruptible power systems #Inverters #Inductors #Voltage control #Digital control #Regulators #State feedback #Observers #State estimation #Noise reduction
Super-lift Luo-converters
Tập 2 - Trang 425-430 vol.2
The voltage lift technique has been successfully employed in design of DC/DC
converters, e.g. three series Luo-converters. However, the output voltage
increases in arithmetic progression. This paper introduces a novel
approach-super lift technique that implements the output voltage increasing in
geometric progression. It effectively enhances voltage transfer gain in power
series.
#Voltage #Inductors #Switches #Arithmetic #Switching circuits #Switched capacitor circuits #Diodes #Electronic circuits #Switching frequency #USA Councils