Showing 1-25 of 12,159 resultsfor "Index Terms":Resonant Response
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A New Hybrid Switching Frequency Control for Resonant Converter with Fast Dynamic Response
2018 IEEE Energy Conversion Congress and Exposition (ECCE)
Year: 2018 | Conference Paper |
Cited by: Papers (3)
A new hybrid switching frequency technique is proposed in this paper to improve the efficiency while providing fast dynamic response. Under steady state condition, the switching frequency of resonant converter is controlled to track the resonant frequency of converter to either reduce the turn-off losses or circulating losses of converter, and thereby improving the efficiency. The output voltage r...Show More
Multi-step Simplified Optimal Trajectory Control (SOTC) for fast transient response of high frequency LLC converters
2015 IEEE Energy Conversion Congress and Exposition (ECCE)
Year: 2015 | Conference Paper |
Cited by: Papers (29)
This paper proposes Multi-step Simplified Optimal Trajectory Control (SOTC) for the high frequency LLC converters. SOTC can improve the transient performance of the LLC converters by immediately changing the pulse width of the primary driving signal during the load transient. However, the implementation of SOTC requires high-performance digital controllers. The proposed Multi-step SOTC calculates ...Show More
Influence of a tap changer position on the transformer's frequency response
2018 Innovative Materials and Technologies in Electrical Engineering (i-MITEL)
Year: 2018 | Conference Paper |
Cited by: Papers (1)
The paper discusses the problem of tap changer position influence on frequency response of transformer windings. Frequency Response Analysis (FRA) is a standard test used for diagnostics of mechanical condition of transformer's active part. By changing the tap number some part of the regulation winding is added or subtracted from the main winding. This leads to changes in the shape of measured FRA...Show More
State Trajectory Analysis for LLC Resonant Converter Under Phase-Shift Modulation
2024 IEEE China International Youth Conference on Electrical Engineering (CIYCEE)
Year: 2024 | Conference Paper |
The LLC resonant converter can be utilized in the new energy vessel power systems, connecting new energy sources and power batteries or daily loads. Employing a phase-shift modulation (PSM) strategy instead of pulse frequency modulation (PFM) can enhance the utilization of magnetic components and improve the power density of the converter. However, the new energy vessel power systems face the chal...Show More
Modeling and Control of Digitally Controlled Series Resonant Converter Using Software Frequency Response Analysis
2023 IEEE International Transportation Electrification Conference (ITEC-India)
Year: 2023 | Conference Paper |
Resonant converters are widely used topologies in applications demanding high gain, and high power density with higher efficiency due to their soft switching capabilities enabling higher switching frequency operations. Modeling techniques such as extended describing function-based method, dq based models are evolving in the literature to obtain plant and control transfer functions for resonant con...Show More
Modeling and design of the LLC resonant converter used in solar array simulator
Chien-Hsuan Chang;Hung-Liang Cheng;En-Chih Chang;Chun-An Cheng;Hung-Yi Chen
2012 7th IEEE Conference on Industrial Electronics and Applications (ICIEA)
Year: 2012 | Conference Paper |
Cited by: Papers (1)
An LLC resonant converter has been used to provide the electrical characteristics of solar arrays. In this paper, its small signal model is derived based on the extended describing function concept. The corresponding frequency response can be easily obtained from IsSpice simulation of the equivalent circuit model. Furthermore, a closed-loop compensation controller is designed according to the deri...Show More
Resonant and non-resonant inductive power transfer systems based on planar spiral coils
Chung-Chuan Hou;Bo-Yen Chen;Kuo-Jui Lee;Heng-Yuan Ku;Po-Chun Chang;Tang-Jung Chen
2017 IEEE 3rd International Future Energy Electronics Conference and ECCE Asia (IFEEC 2017 - ECCE Asia)
Year: 2017 | Conference Paper |
Cited by: Papers (1)
This study discusses the characteristics of the resonant and non-resonant inductive power transfer (IPT) systems based on planar spiral coils. The transfer function and frequency response of the resonant and non-resonant IPT systems are derived. The experimental results under varied air gap, load, and input voltage are presented to validate the performances of the resonant and non-resonant IPT sys...Show More
Multi-band Configurations of L-shape and F-shape Microstrip Antennas
2017 International Conference on Computing, Communication, Control and Automation (ICCUBEA)
Year: 2017 | Conference Paper |
Cited by: Papers (4)
Compact L-shape microstrip antenna is proposed. With respect to first three resonant modes, L-shape patch gives multi-band frequency response with broadside radiation pattern. To realize tunable frequency ratio with respect to three resonant modes, L-shape patch is loaded with open circuit stub which yields novel F-shape microstrip antenna. The variation in stub length yields tuning of first three...Show More
Improvement on frequency response characteristics of the ultra-thin piezoelectric acoustic actuators
This paper proposes a new method to improve the frequency response characteristics of the ultra-thin piezoelectric acoustic actuators. In order to improve the sound quality of the piezoelectric acoustic actuators, we simulated and analyzed the modal vibration characteristics of the piezoelectric acoustic actuator using the finite-element analysis (FEA) method and experimental studies. The ultra-th...Show More
Simplified Optimal Trajectory Control for 1 MHz LLC Converter with Wide Input Voltage Range
2019 IEEE Applied Power Electronics Conference and Exposition (APEC)
Year: 2019 | Conference Paper |
Cited by: Papers (14)
48 V bus converter is widely used in telecom and networks power architecture. This paper presents LLC converter as single stage solution for isolated and regulated bus converter, and addresses the control challenges for this converter. In this paper, Simplified Optimal Trajectory Control (SOTC) is used to control 1 MHz LLC converter with input voltage range 40 V:60 V and frequency range 0.8 MHz: 1...Show More
Practices are provided for establishing procedures that will yield data to demonstrate that the equipment can meet its performance requirements during and/or following one safe shutdown earthquake event preceded by a number of operating basis earthquake events. This standard may be used to establish tests, analyses, or experienced-based evaluations that will yield data to demonstrate equipment per...Show More
Modeling and Digital Implementing for Charge Control of LLC Resonant Converter with Duty Cycle Balance
IECON 2024 - 50th Annual Conference of the IEEE Industrial Electronics Society
Year: 2024 | Conference Paper |
This paper presents a digital implementation of charge control for LLC resonant converter with duty cycle balance. The control mode is analyzed, and the small-signal model is established and compared with SIMPLIS simulation results. The comparison indicates that within 1/10 of the switching frequency, the two results are closely aligned. Using the comparator and timer in the digital controller, ch...Show More
Selectivity Increasing of Resonator on Open-Circuited Stubs
2022 IEEE 41st International Conference on Electronics and Nanotechnology (ELNANO)
Year: 2022 | Conference Paper |
Cited by: Papers (2)
The features of the frequency impedance characteristic, as well as the transmission response of a resonator based on two open-circuited stubs, are considered. The advantage of such a resonator is the high steep slope of the frequency response and the presence of two zeros near the resonant frequency. A noticeable selectivity deterioration in the stop bands when detuning from the resonant frequency...Show More
Dual-polarized bandpass frequency selective structure with quasi-elliptic response
2011 IEEE International Symposium on Antennas and Propagation (APSURSI)
Year: 2011 | Conference Paper |
Cited by: Papers (2)
This paper presents a new design of frequency selective structure based on a two-dimensional periodic array of hollow square coaxial waveguides, which exhibits a narrow bandpass response under dual polarizations. The design is insensitive to different polarizations due to its structural symmetry and produces a stable quasi-elliptic filtering response under different incident angles. Extensive simu...Show More
Design of a High-Selectivity Frequency Selective Surface Based on SIW Technology
2023 IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes for RF and THz Applications (IMWS-AMP)
Year: 2023 | Conference Paper |
Cited by: Papers (1)
In this paper, a dual-polarized high-selectivity frequency selective surface (FSS) is proposed by using substrate integrated waveguide (SIW) technology. The working mechanism of the FSS and the electromagnetic wave transmission characteristics of TM and TE polarization under different incidence angles are analyzed by full wave electromagnetic simulation method. The simulation results show that: th...Show More
This guide is applicable to the measurement of Frequency Response Analysis (FRA) of oil immersed power transformers. It is intended to provide the user with the requirements and specifications for instrumentation, procedures for performing the tests, techniques for analyzing the data, and recommendations for long-term storage of the data and results.Show More
This guide is applicable to the measurement of Frequency Response Analysis (FRA) of oil immersed power transformers. It is intended to provide the user with the requirements and specifications for instrumentation, procedures for performing the tests, techniques for analyzing the data, and recommendations for long-term storage of the data and results.Show More
For some sampled-data systems such as hard disk drives, which have mechanical resonant modes above the Nyquist frequency, suppressing the gain of these modes is a trade-off issue in mechanical/control design. In this paper, we propose a new method to determine openloop gain criteria above the Nyquist frequency. It clarifies the upper limit of the gain so that helps to design less conservative cont...Show More
Model Based Predictive Peak Current Control Scheme for LCLC Resonant Converter
2024 IEEE Energy Conversion Congress and Exposition (ECCE)
Year: 2024 | Conference Paper |
A model predictive-based peak current control technique for LCLC resonant converter is proposed in this work. The resonant capacitor voltage sensing is employed to obtain the peak current sample, thus eliminating the need for high bandwidth current sensors. The digital predictive peak current implementation with no low pass filter facilitates faster dynamic response compared to the conventional av...Show More
Fast Transient Modulation of a Dual-Bridge Series Resonant Converter
IECON 2021 – 47th Annual Conference of the IEEE Industrial Electronics Society
Year: 2021 | Conference Paper |
Cited by: Papers (5)
In a dual-bridge series resonant dc-dc converter (DBSRC), improper transient modulation may cause dc bias current and overshoot current/voltage in the resonant tank and transformer during the step load change process. Consequently there is a long duration of oscillation before the converter may enter into the new steady state. Based on the root locus of resonant capacitor current and voltage, a fa...Show More
Resonant Frequency Tracking Scheme for LLC Converter Based on Large and Small Signal Combined Model
Runhui He;Bo Xue;Mingde Zhou;Minfan Fu;Junrui Liang;Yu Liu;Haoyu Wang
To achieve optimal system performance, it’s recommended to operate an LLC resonant converter at its resonant frequency. However, in mass production, the resonant parameters of different products can deviate significantly. This means that we need to actively track the resonant frequency during practical usage. To address this issue, this paper presents a novel automatic control scheme for LLC conve...Show More
Power Systems Frequency Response using Frequency Dependent Network Equivalent based on a Rational Function in the z-domain
Juan Verduzco-Durán;Antonio Ramos-Paz;Aurelio Medina-Rios;Rafael Cisneros-Magaña
2023 IEEE International Autumn Meeting on Power, Electronics and Computing (ROPEC)
Year: 2023 | Conference Paper |
This article deals with the problem of harmonic resonance in power systems, which causes harmonic amplification and can worsen existing harmonic problems in the system. Therefore, performing a frequency response analysis is essential to identify series and parallel resonances in the system within a frequency range of interest. To address this issue, it is proposed to use a Frequency-Dependent Netw...Show More
Derivation of transfer function of LLC current resonant converter using numerical calculation
Masahito Shoyama;Takuma Sagara;Yusuke Yamashita;Jun Imaoka;Yu Yonezawa;Yoshiyasu Nakashima
2017 IEEE Energy Conversion Congress and Exposition (ECCE)
Year: 2017 | Conference Paper |
Cited by: Papers (3)
Among various converters, the LLC electric current resonant converter attracts attention because of high power density, low noise and high efficiency. However, this converter cannot apply the analysis of averaging method, and impossible to derivate the transfer function, so designing is difficult. In this study, we devised a method to derive a frequency response characteristic with a transfer func...Show More
Full-Bridge LLC Resonant Converter with Super-Twisting Non-Singular Fast Terminal Sliding Mode Control
2024 IEEE 7th International Electrical and Energy Conference (CIEEC)
Year: 2024 | Conference Paper |
In response to the problem of large dynamic overshoot in the traditional proportional-integral (PI) control of full-bridge LLC resonant converters, a novel control strategy based on the super-twisting non-singular fast terminal sliding mode (STNFTSM) is proposed. Firstly, this paper describes the basic principles of LLC resonant converters. Then, an improved super-twisting algorithm is proposed, a...Show More
A Small Signal Model of Dual Bridge Series Resonant DC/DC Converter for Power Electronic Traction Transformer
2019 IEEE Energy Conversion Congress and Exposition (ECCE)
Year: 2019 | Conference Paper |
Cited by: Papers (7)
Dual bridge series resonant converter (DBSRC) is a promising topology applied in power electronic traction transformer (PETT). The dynamic model of DBSRC is rarely reported in current reference, which can give a guidance to design the controller. In this paper, a simple small signal model of DBSRC is obtained through a reduced-order state space equation and then the transfer functions of control-t...Show More
Standards Dictionary Terms
- Fourier spectrum
- broadband response spectrum
- coherence function
- correlation coefficient function
- cutoff frequency
- damping
- flexible equipment
- floor acceleration
- ground acceleration
- narrowband response spectrum
- natural frequency
- operating basis earthquake (OBE)
- power spectral density (PSD)
- qualified life
- required response spectrum (RRS)
- resonant frequency
- response spectrum
- rigid equipment
- safe shutdown earthquake (SSE)
- sine beats
- stationarity
- test response spectrum (TRS)
- transfer function
- zero period acceleration (ZPA)
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