06161654.rar - Compared to the traditional single-phase-shift (SPS)
control, dual-phase-shift (DPS) control can greatly improve the
performance of the isolated bidirectional dual-active-bridge dc-dc
converter (IBDC). This letter points out some wrong knowledge
about transmission power of IBDC under DPS control in the
earlier studies. On this basis, the letter gives the detailed
theoretical and experimental analyses,2013-03-09 14:30:06,下载40次
06155092.rar - Z-source energy conversion is a recent concept intro-duced for adding voltage-boost functionality to the traditional buck-only dc-ac inverter. The same concept can equally be ex-tended to the indirect ac-ac matrix converter, where only a single Z-source impedance network needs to be inserted to its interme-diate dc-link. The topology formed is thus quite straightforward. Its modulation is however nontrivial if advantages like buck-boost flexibility, minimum commutation count, ease of implementation, and sinusoidal input and output quantities are to be attained sim-ultaneously. This capability is now,2013-03-09 14:28:51,下载19次
06153075.rar - systematic method for deriving three-port
converters (TPCs) from the full-bridge converter (FBC) is
proposed in this paper, which splits the two switching legs of the
FBC into two switching cells with different sources and allows a
DC bias current in the transformer. By using this systematic
method, a novel full-bridge three-port converter (FB-TPC) is
developed for renewable power system applications with merits of
simple topologies and control, reduced number of devices and
single stage power conversion between any,2013-03-09 14:22:33,下载5次
06134681.rar - This paper presents the analysis and design of a
new ac-ac resonant converter applied to domestic induction
heating. The proposed topology, based on the half-bridge series
resonant inverter, uses only two diodes to rectify the mains
voltage. The proposed converter can operate with zero voltage
switching during both switch-on and switch-off transitions.
Moreover, this topology doubles the output voltage and,
therefore, the current in the load is reduced for the same output
power. As a consequence, the converter efficiency is significantly
improved.
The analytical and simulation results have,2013-03-09 14:19:00,下载5次
06129446.rar - Abstract—A linear metro propelled by a single-sided linear
induction motor (SLIM) has attracted much attention recently.
Compared to the rotating induction machine (RIM) drive system,
the SLIM drive has advantages such as direct thrust without
needing friction between the wheel and railway track, small
cross-sectional area, lack of gear box, and flexible line choice on
account of the greater climbing capability and smaller turning
circle. However, owing to its cut-open primary magnetic circuit,
the SLIM has longitudinal end effect and,2013-03-09 14:14:36,下载4次
06101573.rar - Abstract—Series resonant DC-DC converter with clamped
capacitor voltage exhibits excellent characteristics in forward
operating mode including simple control, high reliability, soft
switching, high power density and inherently limited load fault
current. However, the conventional single angle phase-shift
modulation that works well in the forward mode cannot reverse
the power flow. In this paper, we propose a modulation strategy
for reverse mode operation by utilizing three phase-shift angles
afforded by the two active full bridges of the circuit. We identify
the optimal modulation trajectories in three-dimensional
modulation space and implement a look-up table based
modulator for power flow control. A high-fidelity simulation,2013-03-09 14:00:01,下载7次
06095647.rar - In order to improve the speed precision and stabilization of the gimbal servo system of double gimbal
magnetically suspended control moment gyro, a comprehensive analysis on the reason of electromagnetic torque ripples of
BLDC motor with non-ideal back EMF drives in conduction region and commutation region is presented. A novel automatic
control method of torque is proposed. With this method, the current control rule is designed, and the duty cycle of PWM is
regulated in real-time by measuring the wave function of back EMF. In order to eliminate the diode freewheeling of the,2013-03-09 13:40:12,下载10次
06030952.rar - Portable applications require multiple supplies with
different output levels and some applications also require negative
outputs. Single-inductor multiple-output (SIMO) switchers
are a good for existing parallel output configurations. This study
presents an SIMO dc–dc converter capable of generating buck,
boost, and inverted outputs simultaneously. The operation of this
class of converter being driven by the ripple in the inductor current
the conventional averaging method does not work well. An
inductor current ripple-based modeling approach has been proposed
to accurately model and analyze the converter. The control,
cross-coupling, and cross-regulation transfer functions, generated
through the model, accurately represent the performance of the
converter. The proof of concept has been,2013-03-09 13:30:23,下载4次
06011679.rar - Solid-state switch mode AC-DC converters having
high-frequency transformer isolation are developed in buck, boost,
and buck-boost configurations with improved power quality in
terms of reduced total harmonic distortion (THD) of input current,
power-factor correction (PFC) at AC mains and precisely
regulated and isolated DC output voltage feeding to loads from few
Watts to several kW. This paper presents a comprehensive study
on state of art of power factor corrected single-phase AC-DC converters
configurations, control strategies, selection of components
and design considerations, performance evaluation, power quality
considerations, selection criteria a,2013-03-09 13:13:18,下载18次
05986756.rar - cell voltage imbalance of series-connected energy
storage cells, such as supercapacitors (SCs) and lithium-ion cells,
causes premature deterioration and a decrease in the available
energies of the cells. Various equalization techniques have been
developed for diminishing such imbalances. However, since the
number of switches, sensors, and/or multiwinding transformers
present in conventional equalizers is directly proportional to the
number of series connections of the cells, the circuit complexity
and cost of the equalizers are prone to increase with the number
of series connections. In this paper, single-switch cell voltage
equalizers using multistacked buck-boost converters, such as the
single-ended primary inductor converter (SEPIC,2013-03-09 13:09:33,下载3次
Combining-the-Principles-of-Sliding-Mode--Direct. - sensorless induction motor drive is presented, in
which the principles of sliding-mode control, direct torque control
(DTC), and space-vector modulation are combined to ensure
high-performance operation, both in the steady state and under
transient conditions. Merits of the classic DTC transient behavior
are preserved, while the steady-state operation is significantly improved.
The torque and flux controllers, and motor state observer
are of the sliding-mode type. The inverter is directly controlled on
the basis of torque and flux errors, using space-vector pulsewidth
modulation. Computer simulations and experimental,2012-11-27 15:08:44,下载20次
A-New-Approach-to-Direct-Torque-Control-of.rar - This paper presents a simplified algorithm
of controlling an interior permanent magnet
synchronous motor (IPMSM) for maximum torque
per ampere (MTPA) of stator current with inherent
non-linearities of the motor. Contrary to the
conventional control of IPMSM with d-axis current
equals to zero, a non-linear expression of d-axis
current has been derived and subsequently
incorporated in the control algorithm for maximum
torque operation. In this work, it is observed,2012-11-27 14:55:51,下载46次
A-Novel-Approach-for-MTPA-Speed-Control-of-IPMSM- - In this paper a new approach to direct torque control
(DTC) of induction motor drive is presented. In comparison with
the conventional DTC methods [1], [22] the inverter switching frequency
is constant and is dramatically increased, requiring neither
any increase of the sampling frequency, nor any high frequency
dither signal. The well-developed space vector modulation technique
is applied to inverter control in the proposed DTC-based
induction motor drive system, thereby dramatically reducing the
torque ripple and speed ripple.,2012-11-27 14:54:55,下载19次
Direct-Torque-ControlledPermanent.rar - modified direct torque control (DTC) scheme for
interior permanent magnet synchronous machine (IPMSM) is investigated
in this paper, which features in very low flux and torque
ripple and almost fixed switching frequency. It is based on the compensation
of the error flux linkage vector by means of space vector
modulation. Modeling and experimental results show that the flux
and torque ripples are greatly reduced when compared with those
of the basic DTC.With the new scheme, very short sampling time is
not essential. All the advantages of the basic DTC are still retained.
In addition, fixed switching frequency at different operating conditions
becomes possible.
,2012-11-27 14:53:48,下载27次
An-Improved-Stator-Flux-Estimation-for-Speed.rar - This paper proposes a programmable low pass
filter (LPF) to estimate stator flux for speed sensorless stator
flux orientation control of induction motors. The programmable
LPF is developed to solve the dc drift problem associated with a
pure integrator and a LPF. The pole of the programmable LPF is
located far from the origin in order to decrease the time constant
with the increasing speed. In addition, the programmable LPF
has the phase/gain compensator to estimate exactly stator flux
in a wide speed range. Consequently, the drift problem is much
improved and the stator flux is exactly estimated in the wide speed
range. The validity of the proposed programmable LPF is verified
by speed sensorless vector control of a 2.2 [kW] three-phase
induction motor.,2012-11-27 14:50:35,下载7次