Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 19 of 19 for “"Multi-Resonant"”.
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Multi Resonant Switched-Capacitor Converter
This thesis presents a novel Resonant Switched-Capacitor Converter with Multiple Resonant Frequencies, abbreviated as MRSCC for both high density and efficiency non-isolated large step-down Intermediate Bus Converter (IBC). Conventional Resonant Switched-Capacitor Converter (RSCC) proposed by …
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Multi-resonant passive components for power conversion
… delay fidelity for bulk energy storage. These multi-resonant components are substantially smaller than their lumped counterparts, in particular requiring less inductance, and enforce useful waveform symmetries that can be traded for higher power or higher efficiency.
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High-frequency multi-resonant power conversion techniques
The multi-resonant technique, a novel concept in dc/dc power conversion, is proposed. The essence of the multi-resonant power conversion is the effective utilization of the major parasitic reactive components of the power stage, including the leakage inductance of the power transformer, output …
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LLC Resonant Converter Based Single-stage Inverter with Multi-resonant Branches
… variable frequency modulation (VFM) based on LLC resonant converter. And LLC converter is a common topology of dc/dc conversion. LLC resonant converter can achieve high efficiency and soft-switching performance. Since the dc gain curve of the single-resonant LLC converter is flat when the …
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High-frequency off-line power conversion using quasi-resonant and multi-resonant techniques
… (ZCS) and zero-voltage-switching (ZVS) quasi-resonant techniques, and the zero-voltage-switching multi-resonant technique, are evaluated for high-frequency, off-line applications. The study is performed with emphasis on the conversion-frequency range, efficiency, load range, input-voltage …
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Multi-resonant Electromagnetic Shunt in Base Isolation for Vibration Damping and Energy Harvesting
… energy by using an optimally configured multi-resonant electromagnetic shunt in base isolation. In this research, two multi-resonant shunt configurations, parallel and series, were proposed and optimized based on the H2 criteria when the base isolation system is subjected to ground …
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Extended describing function method for small-signal modeling of resonant and multi-resonant converters
… upon the previous work on using the multi-variable describing functions to treat the circuit nonlinearities. As an extension to the statespace averaging method, this modeling technique can incorporate any Fourier components for good model accuracy and provides continuous-time …
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Comparison of input current spectral components for flyback PWM and resonant converters
… Zero-Current-Switched Quasi-Resonant-Converter, and Zero-Voltage-Switched Quasi-Resonant-Converter are derived in terms of normalized circuit parameters. These analytical results are tested against experimental results. The same numerical example is presented for these three …
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Electrically-Small Antenna Performance Enhancement for Near-Field Detuning Environments
… wideband small antennas near kaH1 have achieved multiple-octave impedance bandwidths when utilizing volume-efficient designs. Significant advances in both the power and miniaturization of microelectronics have created a second possible approach to enhance bandwidth. Frequency agility, via switch …
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Design of high-density dc/dc converters
Zero- Voltage-Switching Multi-Resonant-Converter (ZVS-MRC) techniques are applied with hybrid microelectronics fabrication technologies to design and implement efficient, high-density (>50 W/in³) dc/dc converters. A low-profile high-density power stage of a 25 W dc/dc flyback ZVS-MRC is designed …
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A hybrid compensation-based misalignment tolerant wireless power transfer system for e-mobility
… for e-mobility. The thesis proposes a hybrid multi-resonant compensation network (LCC-LCC and LCC-S) for CC/CV charging during perfect alignment, controlled by the secondary side only. Additionally, the thesis introduces a phase shift control technique in the inverter to maintain the …
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Advancements in resonant and current source gate driving techniques for fast switching Wide Band Gap (WBG) Metal Oxide Field Effect Transistors (MOSFETs)
… various alternatives, specifically the Multi-Resonant Gate Driver (MRGD) and the Current Source Gate Driver (CSGD). A sweep-based optimization method is presented to increase the MRGD design accuracy and frequency response. Hardware prototypes of the MRGD demonstrate 34% efficiency …
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On Applications of Resonances, from One to Infinity
… in many applications. In this work, we study multiple systems making use of resonances, with numbers ranging “from one to infinity.” First, we derive single-frequency bounds for the surface-enhanced Raman scattering (SERS) where resonant nanostructures are used to enhance the Raman signal. …
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Novel concepts in high-frequency resonant power processing
… the constant-frequency zero-voltage-switching multiresonant-converter (CF ZVS-MRC) technique and the zero-voltage-switching technique that uses the magnetizing inductance of the power transformer as a resonant element {ZVS {L<sub>M</sub>)) are proposed. analyzed, and evaluated for …
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Towards High-Performance Reflectarray Antennas: Phase Sensitivity Reduction for Wide Bandwidth
… techniques, such as air gaps and multi-resonant elements. An initial design of a reflectarray antenna was introduced and simulated using a Jerusalem cross-shaped unit cell. While promising, this design highlighted the necessity for a deeper understanding of the field behavior …
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Resonant power conversion topologies for inductive charging of electrical vehicle batteries
… converter topologies related to the series resonant converter. When coupled to the vehicle inlet, the frequency-controlled series-resonant converter results in a capacitively-filtered series-parallel LCLC (SP-LCLC) resonant converter topology with zero voltage switching and many other …
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Harvesting energy from non-ideal vibrations
… single harmonic frequency shifting and multi-frequency/broadband excitation. This methodology includes a broad-band impedance matching theory and a power electronics architecture to implement that theory. The generalized impedance matching theory extends the well known single frequency …
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Modeling of Outer Radiation Belt Electron Scattering due to Spatial and Spectral Properties of ULF Waves
… and phases, where it is confirmed that multi-resonant transport is possible for overlapping resonances in phase space when the Chirikov criterion is met (stochasticity parameter K = 1). The electron energy scattering enhances with decreasing frequency separation, i.e. increasing K, and …
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On-chip spectrometers with photonic integrated circuits
… photonic sampling circuit composed of multiple stages of tunable interferometers. This design enables an exponential increase in the number of high-performance channels and experimentally achieves an ultra-high resolution of less than 10 pm across a broad bandwidth exceeding 200 nm. …