scholarly journals A Method for Stabilizing the Output Voltage of a Two-Phase Nonlinear Power Device with Series Reactors

1998 ◽  
Vol 22 (4_2) ◽  
pp. 721-724
Author(s):  
F. Tatsuta ◽  
K. Hosokawa ◽  
M. Tadokoro
Keyword(s):  
Output Voltage ◽  
Power Device ◽  
Two Phase

scholarly journals Minimization of Output Voltage Ripple of Two-Phase Interleaved Buck Converter with Active Clamp

Energies ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 5215
Author(s):  
Yeu-Torng Yau ◽  
Kuo-Ing Hwu ◽  
Jenn-Jong Shieh
Keyword(s):  
Output Voltage ◽  
Control Strategies ◽  
Pulse Amplitude ◽  
Buck Converter ◽  
Control Technique ◽  
Two Phase ◽  
Second Stage ◽  
Voltage Ripple ◽  
Active Clamp ◽  
Two Phases

A control technique combining pulse width modulation (PWM) and pulse amplitude modulation (PAM) is presented herein to reduce the output voltage ripple of the converter as little as possible. Such a converter requires a two-stage cascaded structure. The first stage is the buck-boost converter, which is used to adjust the output voltage of the second power stage, whereas the second stage is the two-phase interleaved buck converter, which is used to reduce the output voltage ripple. In theory, the two phases of the second stage operate under the condition of individual duty cycles of 50% with a phase difference of 180° between the two, and hence, the currents in the two phases are cancelled for any period of time, thereby making the output voltage of the converter almost voltage-free. Moreover, in order to improve the overall efficiency further, the proposed soft-switching technique based on an active clamp is presented and applied to these two stages to render the main and auxiliary switches turned on with zero-voltage switching (ZVS). Finally, the operating principles and control strategies of the proposed converter are described, and then, their effectiveness is verified by experimental results.

Two phase PFC circuit to keep constant output voltage even under momentary power outages

2011 ◽  
Author(s):  
Masaya Takahashi ◽  
Kimihiro Nishijima ◽  
Michihiko Nagao ◽  
Terukazu Sato ◽  
Takashi Nabeshima
Keyword(s):  
Output Voltage ◽  
Power Outages ◽  
Two Phase ◽  
Constant Output

scholarly journals Performance Modelling and Design Techniques for Efficiency Improvement in On-chip Switched-Capacitor DC-DC Converter

2022 ◽  
Author(s):  
Sunita Saini ◽  
Davinder Singh Saini
Keyword(s):  
Output Voltage ◽  
Optimization Technique ◽  
Switching Frequency ◽  
Switching Loss ◽  
Performance Modelling ◽  
Two Phase ◽  
Load Current ◽  
Vector Method ◽  
Conduction Loss ◽  
On Chip

Abstract Fundamental charge vector method analysis is a single parameter optimization technique limited to conduction loss assuming all frequency-dependent switching (parasitic) loss negligible. This paper investigates a generalized structure to design DC-DC SC converters based on conduction and switching loss. A new technique is proposed to find the optimum value of switching frequency and switch size to calculate target load current and output voltage that maximize the efficiency. The analysis is done to identify switching frequency and switch size for two-phase 2:1 series-parallel SC converter for a target load current of 2.67mA implemented on a 22nm technology node. Results show that a minimum of 250MHz switching frequency is required for target efficiency more than 90% and the output voltage greater than 0.85V where the switch size of a unit cell corresponds to 10Ω on-resistance. MATLAB and PSpice simulation tools are used for results and validation.

scholarly journals High gain multiphase boost converter based-on capacitor clamping structure

2021 ◽  
Vol 24 (2) ◽  
pp. 689
Author(s):  
Oday Saad Fares ◽  
Jasim Farhood Hussen
Keyword(s):  
High Voltage ◽  
Output Voltage ◽  
Low Voltage ◽  
High Gain ◽  
Industrial Applications ◽  
Boost Converter ◽  
Power Device ◽  
Voltage Gain ◽  
High Voltage Gain ◽  
And Performance

<p>In the last few years, the non-isolated dc converters involving high voltage gain with adequate performance are becoming quite popular in industrial applications. This is resulting in high voltage and current stress on the power device (switches and diodes), as well as a limited output voltage with a high duty cycle. This paper proposes a multi-phase non-isolated boost converter that uses capacitor clamping to increase output voltage while reducing stress across the power device. There are two stages in the proposed converter (first stage is three inductors and three switches and the second stage is clamper circuit of three capacitors and three diodes). The proposed converter is high voltage gain, with low voltage stress through switches transistors. To justify the theoretical analysis, the concept was validated through mathematical analysis and by simulation using MATLAB/SIMULINK. The results carried out the results permit the converter behavior and performance to be accurately.</p>

scholarly journals Optimal tuning of PI controller using system identification for two-phase boost converter for low-voltage applications

2021 ◽  
Vol 12 (4) ◽  
pp. 2393
Author(s):  
M. A. N. Amran ◽  
A. A. Bakar ◽  
M. H. A. Jalil ◽  
A. F. H. A. Gani ◽  
E. Pathan
Keyword(s):  
Mathematical Model ◽  
System Identification ◽  
Output Voltage ◽  
Closed Loop ◽  
Low Voltage ◽  
Pi Controller ◽  
Boost Converter ◽  
Loop Analysis ◽  
Two Phase ◽  
Identification Approach

<span lang="EN-US">This paper presents modeling and hardware implementations of a two-phase DC-DC boost converter by using the system identification approach. The main objective of this research was to study new methods to obtain the values of the constants for the proportional-integral (PI) controller. Existing methods are time-consuming, since the values of the constants for the PI controller need to be calculated. The system identification approach for the closed-loop boost converter saves more time. This method has the fastest technique to find constants </span><em><span lang="EN-US">K<sub>p</sub></span></em><span lang="EN-US"> and </span><em><span lang="EN-US">K<sub>i</sub></span></em><span lang="EN-US"> for the closed-loop two-phase boost converter. To model a two-phase boost converter using the system identification approach, input duty cycle and output voltage are collected in the time domain data. In this study, the transfer function (TF) model, the autoregressive moving average with exogenous (ARMAX) model and the output-error (OE) model were used to generate a mathematical model. To perform the closed-loop analysis, constants </span><em><span lang="EN-US">K<sub>p</sub></span></em><span lang="EN-US"> and </span><em><span lang="EN-US">K<sub>i</sub></span></em><span lang="EN-US"> were obtained based on the generated mathematical model from the system identification approach. The result from the experiment shows that the percentages of overshoot for the TF, ARMAX and OE models were 19%, 25.36% and 24.6%, respectively. The output voltage ripples obtained for all three models were less than 5% of output voltage.</span>

Analysis of a Two-Phase Asynchronous Motor Supplied by a Two-Leg SPWM Controlled Inverter

2015 ◽  
Vol 18 ◽  
pp. 223-232
Author(s):  
Pavel Zaskalicky
Keyword(s):  
Output Voltage ◽  
Supply Voltage ◽  
Asynchronous Motor ◽  
Induction Machine ◽  
Current Waveform ◽  
Two Phase ◽  
Machine Model ◽  
Dc Voltage ◽  
Complex Fourier Series ◽  
Fourier Series Analysis

The presented contribution deals with steady state analysis of a two-phase asynchronousmotor, which is supplied by an IGBT transistors half- bridge connected inverter. The inverter outputvoltage is controlled by a SPWM of the input DC voltage. The complex Fourier series analysis of theinverter output voltage was made, to obtain a spectrum of the harmonic supply voltage. The differentvoltage harmonics was applied to the two-phase induction machine model to obtain electromagnetictorque and supply current waveform for various operation states.

Effect of Shock Loading on the Microstructure of Uniloy 326

1974 ◽  
Vol 32 ◽  
pp. 504-505
Author(s):  
K. P. Staudhammer ◽  
L. E. Murr
Keyword(s):  
Grain Size ◽  
Shock Loading ◽  
Current Investigation ◽  
Two Phase ◽  
05 C ◽  
Shock Deformation ◽  
Heat Treated

The effect of shock loading on a variety of steels has been reviewed recently by Leslie. It is generally observed that significant changes in microstructure and microhardness are produced by explosive shock deformation. While the effect of shock loading on austenitic, ferritic, martensitic, and pearlitic structures has been investigated, there have been no systematic studies of the shock-loading of microduplex structures.In the current investigation, the shock-loading response of millrolled and heat-treated Uniloy 326 (thickness 60 mil) having a residual grain size of 1 to 2μ before shock loading was studied. Uniloy 326 is a two phase (microduplex) alloy consisting of 30% austenite (γ) in a ferrite (α) matrix; with the composition.3% Ti, 1% Mn, .6% Si,.05% C, 6% Ni, 26% Cr, balance Fe.

Sign in / Sign up

Export Citation Format

Share Document