For wireless power transfer (WPT) systems, communication between the primary side and pickup is a challenge because of large air gap magnetic interferences. A novel method, which integrates bidirectional data into high-power WPT system, proposed in this paper. The share same inductive link coreless coils. Power/data frequency division multiplexing technique applied, are transmitted by employing different carriers controlled independently. circuit model multiband system provided to analyze...

Rural production–living–ecological (PLE) space is the essential carrier of China's rural land resource planning and management. However, pattern identification, optimal prediction, multi–scale integration PLE lack sufficient scientific evidence reliable quantitative analysis. To fill this gap, paper proposes a multi-scale use optimization method based on benefit coupling evaluation, BP–ANN CLUE–S models. The typical hilly area upper reaches Yangtze River in southwest China were used as case...

Electrochromic energy storage devices (EESDs) including electrochromic supercapacitors (ESC) and batteries (ECB) have received significant recent attention in wearables, smart windows, colour-changing sunglasses due to their multi-functionality, colour variation under various charge densities. The performance of EESDs is mainly dependent on the properties three major components (i) current collector/substrate (cc/substrate) (ii) electrolyte (iii) materials (ECM). Among EESDs, advanced...

The energy Internet concept has been considered as a new development stage of the smart grid, which aims to increase transmission efficiency and optimize dispatching in time space. Energy router is core device it connects all devices together into net structure manages power flows among them. research work presented this paper described router's function expectations from network perspective, improved existing design. Open shortest path first (OSPF) protocol virtual circuit switching mode...

Single-inductor multi-input multi-output (SI-MIMO) dc-dc converters are attractive in the engineering applications due to advantage of high power density and low cost. In order explore as many possible SI-MIMO topologies, this article proposes a simple effective topology derivation principle that only requires three steps. First, basic cells consisting single inductor multiple sets unidirectional switches well inputs/outputs proposed. Second, integrate mentioned with branch typical...

This paper presents an accelerated particle swarm optimization (PSO)-based maximum power point tracking (MPPT) algorithm to track global (MPP) of photovoltaic (PV) generation under partial shading conditions. Conventional PSO-based MPPT algorithms have common weaknesses a long convergence time reach the MPP and oscillations during searching. The proposed includes standard PSO perturb-and-observe as accelerator. It has been experimentally tested compared with conventional algorithms....

<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> This paper describes a design methodology to achieve optimal performance for short-stroke single-phase tubular permanent-magnet motor which drives reciprocating vapor compressor. The steady-state characteristic of the direct-drive linear-motor compressor system is analyzed, an analytical formula predicting iron loss presented, and motor-design procedure takes into account effect loads under...

For intelligent dc distributed power systems (DC-DPSs), data communication plays a vital role in system control and device monitoring. To achieve cost-effective way, power/signal dual modulation (PSDM), method that integrates transmission with conversion, can be utilized. In this paper, an improved PSDM using phase shift full-bridge (PSFB) converter is proposed. This introduces control-based freedom the conventional PSFB loop to realize same conversion circuit. decoupled are realized without...

Switched mode power supplies (SMPSs) are essential components in many applications, and electromagnetic interference is an important consideration the SMPS design. Spread spectrum-based pulse width modulation (PWM) strategies have been used designs to reduce switching harmonics. This paper proposes a novel method integrate communication function into spread PWM strategy without extra hardware costs. Direct sequence spectrum (DSSS) phase shift keying data employed of SMPS, so that it has...

For the development of communication systems such as Internet Things, integrating with power supplies is an attractive solution to reduce supply cost. This paper presents a novel method power/signal dual modulation (PSDM), by which signal transmission integrated conversion. takes advantage intrinsic ripple initiated in switch mode carriers, cost-effective communications can be realized. The principles PSDM are discussed, and two basic methods (specifically PWM/FSK PWM/PSK) concluded. key...

This paper presents a switched reluctance motor (SRM) torque ripple reduction strategy with deadbeat current control and active thermal management. In this method, the SRM is indirectly controlled by phase current. A method used to improve accuracy, so that error can be reduced significantly. According online measurement of power switching device temperature, frequency will prevent converter from being damaged over-temperature. The feasibility effectiveness proposed have been verified in...

With the increasing number of DC microgrids, microgrid clusters are emerging as a cost-effective solution. Therefore, due to possible long distances between once fault occurs and is cleared, it should be located. Especially, locating high impedance faults (HIFs) challenging. communication-free methods, implementation costs can reduced, noise delay communication eliminated. In this paper, novel localized location method using support vector machines (SVMs) proposed for clusters. The purpose...

Land use change is one of the main factors driving changes in terrestrial carbon storage, which comprises storage vegetation and soil carbon. Selecting Chengdu–Chongqing urban agglomeration (CCUA) as study area, land from 2010 to 2030 were analyzed by combining Future Use Simulation (FLUS) model Integrated Valuation Ecosystem Services Tradeoffs (InVEST) model. The types CCUA are farmland forest. conversion built-up was most important form transfer between 2020. Each type shows smallest under...

A novel online-modeling scheme for the switched reluctance motor (SRM) using a B-spline neural network (BSNN) is proposed in this paper. 2-D BSNN designed to learn nonlinear-flux-linkage characteristic of an SRM online and real-time. Torque, incremental inductance, back-emf estimates can be derived from after training. The does not require priori knowledge electromagnetic characteristics. Simulation experimental results show that has good estimation performance robustness at low medium speed.

The analysis of a novel single-phase, short-stroke, reciprocating tubular motor with quasi-Halbach magnetised moving-magnet armature is described. was developed for applications such as linear compressors. magnetic field distribution, the back-emf and thrust force are established analytically in cylindrical co-ordinate system, predictions compared results derived from finite-element (FE) analysis. It shown that difference between analytical FE predicted average emf (thrust force) over...

In a photovoltaic system, dc–dc power optimizer (DCPO) is an option to maximize the output power. At same time, data links among DCPOs are often required for system monitoring and controlling. This paper proposes novel line communication method DCPOs, in which of DCPO modulated into control loop converter, then transmitted through series-connected dc other DCPOs. process communication, differential phase-shift keying modulation discrete Fourier transformation demodulation employed. To...

Due to their promising feature in reducing greenhouse gas emissions, electric vehicles (EVs) have received overwhelming support recent decades. One of the compelling ideas is that EVs serve as distributed energy storage and provide ancillary services electricity grid. From concept deployment, thorough research required from respective technology, economics policy. This paper gives a review works terms vehicle-to-grid (V2G) impacts on battery degradation. Battery degradation mechanisms main...

Accurate locating of the faulty section is desired in dc microgrid due to presence power electronic converters and low-impedance cables. Some existing schemes consider sources at only one end line; thus, assume that fault current injected from line. This assumption not true case meshed microgrids, where would be supplied both ends. Moreover, communication-based methods require either a fast communication network or data synchronization. To address aforementioned issues, this article proposes...

In this paper, a grid interface current control strategy is presented for DC microgrid, which aims to reduce the disturbance from PV generation and load variation main without converter. The directly controlled by battery DC-DC converter within microgrid. Based on comprehensive analysis of control, system has been mathematically modelled. This enabled two transfer functions be derived that reflect dynamic response inductor duty cycle (inner loop), (outer loop). Experimental study done assess...

Given the constraints of limited cultivated land resources, ensuring and enhancing crop productivity are crucial for food security. This study takes Chengdu as a case study. Using (CLP) evaluation model, we calculated index (CLPI) analyzed its spatial distribution characteristics. The Geographical Detector model was employed to identify main factors influencing CLP, corresponding countermeasures measures were proposed based on limiting degrees these factors. findings reveal that Chengdu’s...

Exploring the spatiotemporal evolution pattern of agricultural functions, analyzing their tradeoff and synergies, carrying out multifunctional zoning, determining combination expansion direction functions in with regional development strategies are conducive to guiding adjustment structure promoting sustainable agriculture. In this context, based on county scale statistical data, paper uses function evaluation index system measure analyze Sichuan Province its mutual relations. Spatial...

A switched reluctance motor torque ripple reduction scheme using a B-spline neural network (BSNN) is presented. Closed-loop control can be implemented an on-line estimator. Due to the local weight updating algorithm used for BSNN, appropriate phase current profile obtained in real time. It has good dynamic performance with respect changes demand. The does not require high-bandwidth controllers. Simulation and experimental results demonstrate validity of