Inductance Coupling Circuit Research Articles

The Transfer Function Characterization and Linearization using an Inductive Coupling Circuit for System Measurement in Hard-to-reach Location and in Medical Diagnostics

This research paper demonstrates the scope and potential of a circuit design of the differential sensory system, functional theory and relevant derivations on its operation details when characterizing their transfer function for signal gain. The idea is using inductive coils as transducer elements responding to changes in the parameter being sensed. This phenomenon is the result of simple movement of a core position bringing about proportionate changes in the inductance of the circuit, and hence ultimately in the output parameters. The output parameters include frequency, duty cycle, current, voltage, frequency, frequency hysteresis, speed, acceleration, kinematics, pressure, range of oscillation, angulation, Impedance voltage, Magnetic field strength, and Transfer function. The results shown can be used for characterizing the materials and hence sensor with high sensitivity, linearity and responsiveness in harsh environmental condition is obtained and characterized and their corresponding transfer functions are obtained. This help in sensing broken metallic in the body during war and sensed in hard to reach to reach locations as a result of the huge magnetic field generated. This also, verifies the derivations and the simulation in literature.

A wireless, battery-free device enables oxygen generation and immune protection of therapeutic xenotransplants in vivo

The immune isolation of cells within devices has the potential to enable long-term protein replacement and functional cures for a range of diseases, without requiring immune suppressive therapy. However, a lack of vasculature and the formation of fibrotic capsules around cell immune-isolating devices limits oxygen availability, leading to hypoxia and cell death in vivo. This is particularly problematic for pancreatic islet cells that have high O2 requirements. Here, we combine bioelectronics with encapsulated cell therapies to develop the first wireless, battery-free oxygen-generating immune-isolating device (O2-Macrodevice) for the oxygenation and immune isolation of cells in vivo. The system relies on electrochemical water splitting based on a water-vapor reactant feed, sustained by wireless power harvesting based on a flexible resonant inductive coupling circuit. As such, the device does not require pumping, refilling, or ports for recharging and does not generate potentially toxic side products. Through systematic in vitro studies with primary cell lines and cell lines engineered to secrete protein, we demonstrate device performance in preventing hypoxia in ambient oxygen concentrations as low as 0.5%. Importantly, this device has shown the potential to enable subcutaneous (SC) survival of encapsulated islet cells, in vivo in awake, freely moving, immune-competent animals. Islet transplantation in Type I Diabetes represents an important application space, and 1-mo studies in immune-competent animals with SC implants show that the O2-Macrodevice allows for survival and function of islets at high densities (~1,000 islets/cm2) in vivo without immune suppression and induces normoglycemia in diabetic animals.

An Empirical Survey on Wireless Inductive Power Pad and Resonant Magnetic Field Coupling for In-Motion EV Charging System

EVs are the recent emerging automotive technology in the transportation sector to reduce the CO2 emission from the internal combustion engine. The issues in EVs technology development are battery tube capacity, heavy-size batteries, fast charging, and safe charging infrastructure. The dynamic wireless charging technology shows a suitable alternative to address the charging system-related issues in EV. However, a limited number of review studies are conducted to specifically address the wireless charging pad design challenges. The wireless inductive power pad and magnetic coupling circuit design are the main factors to decide the performance of the DWPT system. This review analyzes the current developments and challenges associated with wireless charging pad design. Further, this study investigates the potential parameters which improve the performance of a DWPT system to increase the distance traveled (mileage). First, this paper discusses WRIPT technology for DWPT EV charging application, and several parameters affecting the PTE are examined. Also, the aids factors considered for designing the DWPT power pad and different magnetic resonance coupling topologies are presented. In addition, the performance evaluation of the WRIPT power pad, with in-motion testing from the major findings in earlier studies is discussed. Finally, the challenges and opportunities of the WRIPT power pad for in-motion EV charging applications are also addressed. The current state of the art of DWPT and its future directions to make DWPT EV charging systems a full-fledged method are highlighted.

Complete cycle of modeling and simulation for wireless power transfer using circuit theory, simple electronics, and open-source software

This article presents a complete modeling and simulation framework for a simple resonant inductive coupling circuit, composed of a pair of inductive resonators that can wirelessly transfer about 60 W of power at a distance of approximately 15 cm. The circuit was physically implemented, and the transmitting coil was powered by a simple half-bridge electronic circuit that generated a square voltage signal. Measurements were compared to simulation results, and it was found that the proposed model could accurately explain and predict the behavior of the circuit. Our results show that optimum transfer of power varies according to the load values, the fRequency and the distance between the transmitter and receiver, which can vary considerably depending on the application. Simulations using AC circuit analysis helped in depicting the behavior of the circuit under this kind of variability, and in characterizing the presence of the optimum points for power transfer, although these were attained at lower efficiency. The present analysis paves the way for further investigations using control theory to track the frequencies at which maximum power is delivered for each set of variables, i.e., the distance between the resonators and the load value.

Resonant Inductive Coupling for Wireless Power Transmission

Wireless power transmission (WPT) is the method that transferring electrical energy from power source to electrical without any physical contact and it can be used to transfer power to electricity dependent systems or devices. In WPT, electromagnetic energy is produced to transmit the energy from power source (transmitter) to the load (receiver) via resonant inductive coupling. This article focuses on the design of a resonant inductive coupling using parallel-T topology in coupling WTR and combined of single transmitter with multiple receivers. In addition, principle of magnetic wave between the transmitter and receiver with related parameters is utilized to develop in WPT. A parallel-T topology that consists of T-matching network for secondary side is proposed as it is more suitable for weak coupling wireless power transfer applications. Besides that, three circuits are designed to show the resonant inductive coupling for WTP which including the circuit with and without matching network and the circuit of single transmitter with multiple receivers. The simulation of output voltage and output current are observed to relate the effects of frequency on the circuit. The graph of output voltage and power are plotted to show the pattern on effect of the frequencies to the resonant inductive coupling circuit.

Modelling and Implementing a Resonant Inductive Coupling Circuit Using Python and Cost-Effective Components for Wireless Power Transfer

Modelling and Implementing a Resonant Inductive Coupling Circuit Using Python and Cost-Effective Components for Wireless Power Transfer

Robust Control Technique in an Autonomous Microgrid: A Multi-stage $$H\infty$$ Controller Based on Harmony Search Algorithm

Microgrid (MG) control in off-grid mode of operation is one of the main challenges in MGs. Under different loading conditions, voltage and frequency deviate from their nominal limits. The droop control method that applied with the current control and voltage control loops can restore the MG voltage and frequency to their nominal limits. However, it can’t regulate these parameters to their specified values. Additionally, the droop control method can’t do well when the system supplies either nonlinear or unbalanced loads. This paper proposes a control technique for adjusting the voltage and frequency of an MG in islanded mode under different loading conditions. The proposed method is based on applying the H-infinity ($$H\infty$$) robust control as a secondary controller with the droop control method to improve its performance. The proposed method is composed of four stages including; droop control loop, voltage control loop, current control loop and control loop for inductance–capacitance–inductance (LCL) filter and coupling circuit. $$H\infty$$ control has an internal model that can control the frequency and improve the system power quality by decreasing the disturbance frequencies. Moreover, it has two weighted parameters $$\xi$$ and $$\mu$$ that must be correctly adjusted to improve the stability of the system. For a proper adjusting of these parameters, the Harmony Search (HS) optimization method is applied. To prove the effectiveness and superiority of the proposed method, it is applied on a test system with three different loading scenarios using MATLAB/Simulink program. The results are compared with those of droop controller and they confirm that the proposed control method is more effective in controlling the microgrids under islanded mode operation.

Transmission characteristics of magnetic resonance coupling‐based multi‐load wireless power transmission system

If the magnetic resonance coupling-based wireless power transmission system has multiple receivers, cross-coupling will occur between the transmitter and the receiver, resulting in the variation of transmission characteristics when compared with the case of a single receiver. To solve this problem, a mutual inductance coupling circuit model for double-relay and multi-load transmission system and a calculation model for mutual inductance between solenoid coils in the same plane have been built to study the transmission characteristics of the system through simulation and testing. The study results show that: the cross-coupling effect between the transmitter and the receiver will cause resonance frequency shift, or even lead to the variation of resonance frequency splitting characteristic; when compared with a single-load system, the multi-load system may increase in total transmission power and efficiency; generally, with the introduction of additional receivers, the receiving power and efficiency of the original loads will decrease; along with the increase in circuit spacing and the decrease in cross-coupling, the transmission characteristics will gradually regress to the state of a single-load system. In this article, the calculation model for mutual inductance is correct and the maximum relative error in these calculating examples is 5.28%.

Cooper-Pair Number-Phase Quantization for Inductance Coupling Circuit Including Josephson Junctions

Based on the entangled state representation and a bosonic phase operator formalism, we tackle with Cooper-pair number-phase quantization for the inductance coupling circuit including Josephson junctions, and then investigate how Josephson current equations change due to the presence of the coupling inductance and obtain bosonic operator Faraday formula, as well as the corresponding number-phase uncertainty relation.

Analysis and design of inductive coupling and transceiver circuit for inductive inter-chip wireless superconnect

A wireless bus for stacked chips was developed by utilizing inductive coupling among them. This paper discusses inductor layout optimization and transceiver circuit design. The inductive coupling is analyzed by a simple equivalent circuit model, parameters of which are extracted by a magnetic field model based on the Biot-Savart law. Given communication distance, transmit power, data rate, and SNR budget, inductor layout size is minimized. Two receiver circuits, signal sensitive and yet noise immune, are designed for inductive nonreturn-to-zero (NRZ) signaling where no signal is transmitted when data remains the same. A test chip was fabricated in 0.35-/spl mu/m CMOS technology. Accuracy of the models is verified. Bit-error rate is investigated for various inductor layouts and communication distance. The maximum data rate is 1.25 Gb/s/channel. Power dissipation is 43 mW in the transmitter and 2.6 mW in the receiver at 3.3 V. If chip thickness is reduced to 30 /spl mu/m in 90-nm device generation, power dissipation will be 1 mW/channel or bandwidth will be 1 Tb/s/mm/sup 2/.

Quantum Fluctuation of a Mesoscopic Inductance Coupling Circuit at Finite Temperature**The project supported by Natural Science Foundation of Zhejiang Province of China

We study the quantization of mesoscopic inductance coupling circuit and discuss its time evolution. By means of the thermal field dynamics theory we study the quantum fluctuation of the system at finite temperature.

Quantum fluctuations of a non-dissipative mesoscopic inductance coupling circuit in a displaced squeezed Fock state

In this Letter, starting from the classical equation of motion for a mesoscopic inductance coupling circuit, the quantum fluctuations of charge and current of the mesoscopic inductance coupling circuit in a displaced squeezed Fock state are investigated. It is found that the quantum fluctuations of charge and current in each component circuit depend on the device of two circuits and squeezing parameters, while the fluctuations do not depend on displacement parameters.

Coulomb blockade and quantum fluctuations of mesoscopic inductance coupling circuit

The quantum theory for a mesoscopic inductance coupling circuit in accord with the discreteness of electric charges is developed. The finite-difference Schrödinger equation of the coupling circuit has been obtained. The results show that the Coulomb blockade will appear in the circuit and there exist quantum fluctuations of currents in the ground state of the system, and the quantum fluctuations in each component circuit are correlated.

Quantum Fluctuations in a Mesoscopic Inductance Coupling Circuit

Starting from the equation of motion of a mesoscopic inductance coupling circuit, the quantum fluctuations of charge and current in the circuit are investigated in both the eigenstates of the system and the squeezed vacuum state. The results show that there exist quantum fluctuations of the charge and current in both cases, and the fluctuations in each component circuit are connected.

Some factors affecting inductive coordination

Fundamental considerations governing the coordination of power and communication facilities are presented in this article with particular regard to inductive coupling and power circuit influence. Various factors which must be considered are outlined concisely.