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A reconfigurable power management structure for inductive power delivery has been proposed by adaptively employing either resonant voltage or current mode (VM or CM) to improve the inductive power transmission performance against coils’ coupling distance (d), orientation ($\phi $ ), and load impedance (RL) variations. At the presence of these variations, unlike conventional VM and CM power managements...
Lateral GaN-on-Si HEMT technology enables integrated high-voltage half-bridges with gate drivers. However, the capacitive coupling through a common conductive substrate influences switching characteristics. The measured hard-switching turn-on time with floating substrate increased to over 16 ns as compared to conventional source-connected substrate (1 ns), switching 300 V/4A with GaN ICs comprising...
High-speed mechanical switch is the important device of high-voltage direct current(HVDC) circuit breaker. In the paper, a high-speed vacuum mechanical switch composed of the bistable spring retaining device and electro-magnetic repulsion mechanism is proposed. The simulation model of high-speed mechanical switch is established. The simulation analysis of multi-field coupling including electro-magnetic...
Future naval medium-voltage direct current (MVDC) power systems will contain a large number of power electronic devices. The switching events from these devices will produce undesirable effects, such as common-mode (ground) current through coupling of the power system and the ships hull. Historically, research in the area of electromagnetic characterization provides insight into common-mode and conduction...
This paper presents a theoretical treatment of common-mode (CM) and differential-mode (DM) interaction that is known to exist in switch-mode converter systems. This analysis demonstrates that one important metric for evaluating this interaction (displacement currents through the module baseplate) can be quantitatively predicted through theoretical analysis of two types of asymmetry in the converter...
We present a decentralized control strategy that yields switch interleaving among parallel-connected dc-dc buck converters. The proposed method is based on the digital implementation of the dynamics of a nonlinear oscillator circuit as the controller. Each controller is fully decentralized, i.e., it only requires the locally measured output current to synthesize the pulse width modulation (PWM) carrier...
This paper presents an integration of energy-recycling logic circuits with a wireless power transfer receiving module for ultra-low-power applications, such as transcutaneous biomedical implantables. In the prototype design, one inductive coil implanted inside the body receives wireless power and supplies the following electronics. While part of the loading is composed of conventional CMOS logics,...
The resonant magnetic coupling (RMC) method has gained tremendous attention for its prospective features such as a large charging range or multiple device charging (multi-charging) application. In multi-charging systems, however, the receiving power ratio among the receivers is determined by coupling coefficient (k) or quality (Q) factor of each resonant coil. Therefore, it is difficult to supply...
This paper focuses on developing a small-signal model of a coupled-inductor boost converter. A circuital representation of the differential equations is also provided. The aim is to bring a tangible way of analyzing the influence of parameters like the coupling factor or the load on the behavior of the converter. Detailed numerical results complete the analytical study.
A full-bridge power-electronic building block using an inverse coupled inductor (CI) is presented which could substitute standard hard switched inverter legs. In contrast to commercial CPU supplies using CIs, the system is operated at full duty cycle range 0…1 at elevated power levels and shows experimentally proven material savings. The mathematical modeling leads to a volume comparison between single...
This paper explores the dynamic behavior of dual flux coupled memristor circuits in order to further ascertain fundamental theory of memristor circuits. Different cases of flux coupling are mathematically modelled where two memristors are connected in both series and parallel, with consideration given to the polarity of each device. The dynamic behavior is characterized based on the constitutive relations,...
Higher density, tighter margin and lower cost power solutions for the cutting edge datacenter require more characterization of voltage regulator (VR) beyond its power conversion performance such as voltage ratio and efficiency. Fast transient, ground noise sharing and high frequency switching noises coupling to high speed IO are some of the technical aspects that need to be predicted and designed...
Integration of analog and digital circuits is a vital design issue in mixed signal circuits. Switching activity at the digital end widely affects the analog circuitry. This paper presents the generation and variation of substrate current due to the switching activity in a digital circuit and also how the substrate current varies with the switching frequency. The circuit under test is a CMOS inverter...
A method to obtain the simulation model of the switched reluctance machine (SRM) is presented. First, the flux-linkage characteristics of a 1kW 3-phase 12/8-pole SRM are quickly measured without any rotor clamping device and position sensor, and few samples can be obtained. Then, to build the accurate simulation model of the machine with these few samples, chaos theory is applied to the training of...
The paper is based on the poster presented at IEEE Pulsed Power Conference 2015. To test EM brushgun prototype described in the associated paper [1], GEDI Lab built a massive inductive store of transformer type energized by a bank of ultracapacitors (UC bank). Its primary circuit is assembled of 28 jelly roll coils with small height-to-diameter ratio mounted in two adjacent stacks. The coils are energized...
In this paper, channel noise scan approach (CNS) is proposed to efficiently analyze the potential VR-signal coupling issue in the pre-silicon design and the post-silicon debug of the platform development. CNS is based on a new simulation methodology that includes the whole PCB with signals, voltage regulator (VR) networks, and the interaction between the two. The goal of this simulation methodology...
The satellite as a system consists of various bundles of harness interconnections between subsystems, across the panels. These bundles of harness consist of different types of cables - power lines, data lines, command lines. Power lines from solar array also carry switching currents from the solar array switching circuits. When all these cables are bundled together, it essentially brings out the problem...
Autonomous underwater vehicle (AUV) has become a main tool for underwater exploration and research. The mission capability of AUV is often limited by its on-board energy source, and it is usually the most limiting factor on activity of AUVs. The way of recharging AUVs costs a lot of time at present. In this paper, we propose a scheme to recharge AUVs wirelessly underwater. The scheme can not only...
This paper presents a switched-capacitor simulator, optimized for fast computations. Two CAD tools are implemented in order to perform Monte-Carlo simulations, to identify sensitive parasitic coupling prior to layout and to rapidly verify parasitic coupling from an existing layout. Simulation results and measurements on a ΣΔ ADC are compared to validate the tools1.
Noise coupled from switched-mode power supply to signal nets can cause severe signal integrity problems because of the existence of fast switching voltages and currents in the circuit. In this paper, noise coupling mechanism from a synchronous buck converter to a nearby signal trace is studied using a hybrid non-linear model, which combines the synchronous buck converter circuit model and the passive...
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