Erratum: A capacitor bank charger using a high frequency resonant circuit

1986 ◽  
Vol 133 (1) ◽  
pp. 30
Author(s):  
S.A. Mirbod ◽  
W.G. Dunford
Keyword(s):  
High Frequency ◽  
Capacitor Bank ◽  
Resonant Circuit

scholarly journals HIGH FREQUENCY BOOST CONVERTER EMPLOYING SOFT SWITCHING AUXILIARY RESONANT CIRCUIT

2013 ◽  
pp. 262-267
Author(s):  
G. NARESH GOUD ◽  
Y. LAKSHMI DEEPA ◽  
G.DILLI BABU ◽  
P. RAJASEKHAR ◽  
N. GANGADHER
Keyword(s):  
Theoretical Analysis ◽  
High Frequency ◽  
Boost Converter ◽  
Soft Switching ◽  
Resonant Circuit ◽  
Switching Converter ◽  
Turn On ◽  
Switching Losses ◽  
Resonant Inductor ◽  
Switching Method

A new soft-switching boost converter is proposed in this paper. The conventional boost converter generates switching losses at turn ON and OFF, and this causes a reduction in the whole system’s efficiency. The proposed boost converter utilizes a soft switching method using an auxiliary circuit with a resonant inductor and capacitor, auxiliary switch, and diodes. Therefore, the proposed soft-switching boost converter reduces switching losses more than the conventional hard-switching converter. The efficiency, which is about 91% in hard switching, increases to about 97% in the proposed soft-switching converter. In this paper, the performance of the proposed soft-switching boost converter is verified through the theoretical analysis, simulation, and experimental results.

scholarly journals A single-phase DC-AC dual-active-bridge based resonant converter for grid-connected photovoltaic applications

2021 ◽  
Author(s):  
Marcos Felix Aguirre
Keyword(s):  
High Frequency ◽  
Single Phase ◽  
Current Control ◽  
Energy Resources ◽  
Voltage Source ◽  
Resonant Circuit ◽  
Renewable Energy Resources ◽  
Grid Voltage ◽  
Dual Active Bridge ◽  
Averaged Models

In the wake of the global energy crisis, the integration of renewable energy resources, energy storage devices, and electric vehicles into the electric grid has been of great interest towards replacing conventional, fossil-fuel-dependent energy resources. This thesis presents the circuit topology and a control strategy for a 250-W single-phase gridconnected dc-ac converter for photovoltaic (PV) solar applications. The converter is based on the dual active bridge (DAB) kernel employing a series-resonant link and a high-frequency isolation stage. For interfacing the 60-Hz ac grid with the 78-kHz resonant circuit, the converter utilizes a four-quadrant switch array that functions as an ac-ac stage. Therefore, a bipolar low-frequency voltage source, that is the grid voltage, is used to synthesize a symmetrical high-frequency voltage pulse-train for the resonant circuit. Thus, soft switching and the use of a compact ferrite-core transformer have been possible. Then, a fast current-control loop ensures that the converter injects a sinusoidal current in phase with the grid voltage, while a relatively slower feedback loop regulates the converter dc-side voltage, that is, the PV array voltage, at a desired value. To simulate the converter and to design the controllers, the thesis also presents nonlinear large-signal and linearized small-signal state-space averaged models. The performance of the converter is assessed through simulation studies conducted using the aforementioned averaged models, a detailed topological model in the PLECS software environment, and a prototype. Keywords: Photovoltaic, PV, Microinverter, Dual Active Bridge, Phase-shift Modulation, High Frequency Transformer

scholarly journals A Low-Cost Programmable High-Frequency AC Electronic Load with Energy Recycling for Battery Module Diagnostics

2020 ◽  
Vol 10 (2) ◽  
pp. 546
Author(s):  
Chang-Hua Lin ◽  
Kun-Feng Chen ◽  
Kai-Jun Pai ◽  
Kuan-Chung Chen
Keyword(s):  
High Frequency ◽  
Low Cost ◽  
Electrical Energy ◽  
Diagnostic Process ◽  
Recycling Rate ◽  
Resonant Circuit ◽  
Wide Range ◽  
Electronic Load ◽  
High Frequency Ac ◽  
Battery Module

A low-cost programmable high-frequency alternating current (AC) electronic load for battery module diagnosis which possesses energy recycling and portability is proposed. The proposed AC electronic load consists of a micro-controller, a signal capturing circuit, and a resonant circuit, and can be integrated with a human–machine interface (HMI). To diagnose the dynamic characteristics of a lithium battery module, the proposed AC electronic load is served as a test load for providing a wide-range slew-rate loading function. In this study, the extracted energy from the tested battery module during the diagnostic process can be recycled to save energy. In addition, all of the battery module parameters and test conditions can be preset in the HMI, and the battery characteristics and the recycling rate of the electrical energy also can be estimated. Analysis of operation modes and simulations and some experimental results are used to verify the theoretical predictions.

scholarly journals Analysis of Unidirectional Secondary Resonant Single Active Bridge DC–DC Converter

Energies ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 6349
Author(s):  
Cao Anh Tuan ◽  
Takaharu Takeshita
Keyword(s):  
High Frequency ◽  
Design Method ◽  
Total Power ◽  
Resonant Circuit ◽  
Frequency Variation ◽  
Secondary Circuit ◽  
High Frequency Transformer ◽  
Resonant Capacitor ◽  
Voltage Conversion ◽  
Near Future

A compact and highly efficient unidirectional DC–DC converter is required as a battery charger for electrical vehicles, which will rapidly become widespread in the near future. The single active bridge (SAB) converter is proposed as a simple and high-frequency isolated unidirectional converter, which is comprised of an active H-bridge converter in the primary side, an isolated high frequency transformer, and a rectifying secondary diode bridge output circuit. This paper presents a novel, unidirectional, high-frequency isolated DC–DC converter called a Secondary Resonant Single Active Bridge (SR–SAB) DC–DC converter. The circuit topology of the SR–SAB converter is a resonant capacitor connected to each diode in parallel in order to construct the series resonant circuit in the secondary circuit. As a result, the SR–SAB converter achieves a higher total power factor at the high frequency transformer and a unity voltage conversion ratio under the unity transformer turns ratio. Small and nonsignificant overshoot values of current and voltage waveforms are observed. Soft-switching commutations of the primary H-bridge circuit and the soft recovery of secondary diode bridge are achieved. The operating philosophy and design method of the proposed converter are presented. Output power control using transformer frequency variation is proposed. The effectiveness of the SR–SAB converter was verified by experiments using a 1 kW, 48 VDC, and 20 kHz laboratory prototype.

scholarly journals A single-phase DC-AC dual-active-bridge based resonant converter for grid-connected photovoltaic applications

2021 ◽  
Author(s):  
Marcos Felix Aguirre
Keyword(s):  
High Frequency ◽  
Single Phase ◽  
Current Control ◽  
Energy Resources ◽  
Voltage Source ◽  
Resonant Circuit ◽  
Renewable Energy Resources ◽  
Grid Voltage ◽  
Dual Active Bridge ◽  
Averaged Models

In the wake of the global energy crisis, the integration of renewable energy resources, energy storage devices, and electric vehicles into the electric grid has been of great interest towards replacing conventional, fossil-fuel-dependent energy resources. This thesis presents the circuit topology and a control strategy for a 250-W single-phase gridconnected dc-ac converter for photovoltaic (PV) solar applications. The converter is based on the dual active bridge (DAB) kernel employing a series-resonant link and a high-frequency isolation stage. For interfacing the 60-Hz ac grid with the 78-kHz resonant circuit, the converter utilizes a four-quadrant switch array that functions as an ac-ac stage. Therefore, a bipolar low-frequency voltage source, that is the grid voltage, is used to synthesize a symmetrical high-frequency voltage pulse-train for the resonant circuit. Thus, soft switching and the use of a compact ferrite-core transformer have been possible. Then, a fast current-control loop ensures that the converter injects a sinusoidal current in phase with the grid voltage, while a relatively slower feedback loop regulates the converter dc-side voltage, that is, the PV array voltage, at a desired value. To simulate the converter and to design the controllers, the thesis also presents nonlinear large-signal and linearized small-signal state-space averaged models. The performance of the converter is assessed through simulation studies conducted using the aforementioned averaged models, a detailed topological model in the PLECS software environment, and a prototype. Keywords: Photovoltaic, PV, Microinverter, Dual Active Bridge, Phase-shift Modulation, High Frequency Transformer

Analysis of the White Circuit System of the NSRRC TLS Booster

2013 ◽  
Vol 740 ◽  
pp. 817-822
Author(s):  
Chen Yao Liu ◽  
Yao Ching Hsieh ◽  
Kuo Bin Liu ◽  
Din Goa Huang
Keyword(s):  
Electron Beam ◽  
Energy Range ◽  
Light Source ◽  
Capacitor Bank ◽  
Measurement Data ◽  
Beam Current ◽  
Circuit Model ◽  
Repetition Frequency ◽  
Resonant Circuit ◽  
Electron Beam Current

At the Taiwan Light Source (TLS), the booster ring provides energy injection at repetition frequency 10 Hz with injection capability in the top-up mode. To obtain the wide acceleration energy range 50 -- 1.5 GeV, a 'White-circuit' topology has been chosen. The White circuit is, briefly, a biased resonant circuit in which the energy is transferred between the booster bending magnets and a large capacitor bank. The White circuit uses a resonance axiom to ramp the current of the bending magnets. The peak current is 2300 A; the bending magnets can accelerate the energy of the booster electron beam current from 50 MeV to 1.5 GeV with the White circuit system. We analyze the characteristic of the White circuit to get a circuit model. Using the circuit model to simulate impedance and phase are identical with the measurement data of the White circuit. The results are described in this paper.

Applications of Simulation and Demo in High Frequency Electronic Circuit

2013 ◽  
Vol 427-429 ◽  
pp. 450-454
Author(s):  
Qi Yao Tan
Keyword(s):  
High Frequency ◽  
Theoretical Basis ◽  
Electronic Circuit ◽  
Theoretical Foundation ◽  
Case Analysis ◽  
Teaching Experience ◽  
Resonant Circuit ◽  
Teaching Situation ◽  
Effect Model ◽  
The Rich

This paper was based on the rich theoretical foundation and practical teaching experience, and focused on current teaching situation of high frequency electronic circuit and the cognition of simulation and demo, then it had the positive analysis on the superiority of simulation and demo in high frequency electronic circuit, and it also got the teaching case analysis on simulation and demo of parallel resonant circuit in the high frequency electronic circuit. Through establishment and verification of teaching effect model of high frequency electronic circuit, it can obtain that the teaching presents the advantage of positive feedback through the simulation and demo, and it also can provide new theoretical basis and path of exploration for the teaching research in this field.

ANALYTICAL MODEL OF HIGH-FREQUENCY NOISE OF SCHOTTKY-BARRIER FREQUENCY MULTIPLIERS

2011 ◽  
Vol 10 (01) ◽  
pp. 121-131 ◽  
Author(s):  
F. Z. MAHI ◽  
A. R. HELMAOUI ◽  
L. VARANI ◽  
C. PALERMO ◽  
P. SHIKTOROV ◽  
...  
Keyword(s):  
Schottky Barrier ◽  
Analytical Model ◽  
High Frequency ◽  
Voltage Drop ◽  
Noise Spectrum ◽  
Resonant Circuit ◽  
Frequency Noise ◽  
Frequency Multipliers ◽  
Large Signal ◽  
High Frequency Noise

An analytical model of the high-frequency noise of frequency multipliers based on Schottky-barrier diodes (SBD) operating in series with a parallel resonant circuit under large-signal conditions is developed. Such a model, on one hand, takes into account the main intrinsic features of the SBD noise related to shot-noise, returning carriers, plasma resonance at n+n homojunctions, and, on the other hand, it incorporates the SBD noise spectrum modifications induced by the output resonant circuit. It is shown that the SBD embedding into an external circuit can produce the appearance of an extra noise due to up-down conversion of the fluctuations of the voltage drop between the SBD terminals originated by a periodic modulation of the varactor capacitance by the pumping signal.

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