This paper proposes a topology of flux-switching machine with dc excitation to improve the field-weakening capability machines. dc-excited preserves structure typical permanent-magnet machines while replacing permanent magnets field windings. The combined advantages this type in torque production and weakening are exhibited validated by finite element analysis.

This work deals with the design of a Fuzzy Logic Control (FLC) based Energy Management System (EMS) for smoothing grid power profile grid-connected electro-thermal microgrid. The case study aims to an reduce impact on when renewable energy sources are incorporated pre-existing household appliances. scenario considers residential microgrid comprising photovoltaic and wind generators, flat-plate collectors, electric thermal loads electrical storage systems assumes that neither generation nor...

This paper presents a comprehensive survey of state-of-the-art intelligent fault detection and diagnosis in district heating systems. Maintaining an efficient system is crucial, as faults can lead to increased heat loss, customer discomfort, operational cost. Intelligent help identify diagnose faulty behavior automatically by utilizing artificial intelligence or machine learning. In our survey, we review discuss 57 papers published the last 12 years, highlight recent trends, current research...

The main benefits of fuzzy logic control (FLC) allow a qualitative knowledge the desired system’s behavior to be included as IF-THEN linguistic rules for dynamical systems where either an analytic model is not available or too complex due, instance, presence nonlinear terms. computational structure requires definition FLC parameters namely, membership functions (MF) and rule base (RB) defining policy. However, optimization generally carried out by means trial error procedure or, more...

Buildings can deliver short-term thermal energy storage by utilising the capacity of building construction and/or activating water tanks included in heating/cooling installation. The flexibility potential demand management using decentralized has been quantified many theoretical modelling studies, and it is considered an essential technology for affordable transition. We have investigated drivers barriers to adoption buildings district heating cooling systems via a Strengths, Weaknesses,...

Abstract Purpose – This paper is aimed at investigating the potential advantages of flux‐switching machines (FSM) compared to permanent magnet synchronous (PMSM), particularly for applications electric vehicle traction. Design/methodology/approach A 12‐slot 14‐pole PMSM designed an in‐wheel traction application chosen comparison. With same volume constraint, three 12/14 FSM structures are created. Both and modeled using software Flux. Based on these models, finite element analyses (FEA)...

Weight limitations in electric/hybrid cars demand the highest possible power-to-weight ratio from traction motor, as double salient permanent magnet (PM) machines. Their high flux densities air gap result nonlinear analytical models, which need to be time optimized. The incorporated reluctance networks are sensitive correctness of permeances. Conventionally, these networks, permeances calculated by approximating paths; however, it is inefficient. For an improved simulation time, spatial...

Based on investigation of the reluctance network method, this paper proposes a methodology for fast adapting, and solving global flux-switching machine. In methodology, magnetic equivalent circuit (MEC) models different parts flux switching machines (FSM) are defined adapted in synchronism with rotor position. Using incidence matrix variable can be easily assembled adaptive MEC modules. This is validated finite element analysis.

This paper presents an analytical method for evaluating the magnetic flux density produced by spherical permanent magnet arrays used in actuators. To investigate performances of arrays, models are due to their lower computational time compared 3-D finite element analysis. model calculation field a array using charge modeling. obtain total solution, first single tile is considered. By means superposition, obtained. Two topologies modeled and results validated

On the transition toward low-temperature district heating (DH), generation sectors, distribution networks, and building consumers should all be adapted to operation conditions. However, a bottleneck in lowering DH return temperatures is domestic hot water (DHW) system with circulation loop multifamily buildings. Existing systems single heat exchanger often led elevated because of reheating loop. This study developed several innovative designs for future-proof DHW substations that decouple...

This paper investigates the sensitivity of phase inductances to changes in rotor position and armature current Flux-Switching PM machines (FSPM). FSPMs exhibit combined advantages both Switched Reluctance Machines (SRM) Double Salient (DSPM). Energy conversion a FSPM is based on change inductances, which depends not only but also presence PMs. To obtain more insight, are calculated as functions 3-phase 12/10 FSPM. Using Finite Element Method (FEM), static (absolute) incremental (dynamic)...

Flux switching permanent magnet (FSPM) machines bring together the merits of switched reluctance and PM synchronous motors. FSPM employs armature windings PMs in stator region, therefore proximity makes a thermal model mandatory. In literature, modeling is not addressed extensively compared to its electromagnetic modeling. With this aim, first steady-state TEC created for 3-phase 12/10 FSPM. Additionally, conformal mapping, particular Schwarz-Christoffel, used increase accuracy model. Using...

(1) Background: To support the energy transition in Europe, EU has launched multiple initiatives. Supporting “Green Deal” is New European Bauhaus (NEB). District heating and cooling (DHC) an important part of a decarbonized system, its role been stressed by EU. In this paper, DHC is, for first time, reviewed assuming NEB principles. (2) Method: literature review combined with three cases was used collecting data. (3) Results: It confirmed that strong sustainability values. also identified...

During the last century, population growth, together with economic development, has considerably increased energy demand and, although renewable energies are becoming an alternative, still total supply is mainly non-renewable, causing well-known negative effects such as pollution and global warming. On other hand, technological advances have allowed development of increasingly efficient distributed generation systems emergence microgrids, whose studies been focused on architecture, elements,...

The Anisotropic Layer Theory (ALT) has been extensively used for electric machine analysis, due to its ability take finite iron permeability into account globally. However, the effect of slot openings, which are often present in slotted electrical machines, is neglected. In this work, an extension ALT openings proposed. classical combined with Harmonic Modeling Technique (HMT) structures by assuming infinitely permeable tooth tips. A semi-analytical solution described and extended model....

Energy solutions based on sustainable microgrids have been increasing since isolated areas with difficult access can benefit from these feasible solutions. In this context, paper presents the design of an energy management system a fuzzy logic controller for microgrid composed diesel generator, photovoltaic and battery storage system. The strategy uses generation load forecasting to anticipate future behavior microgrid, while considering that state charge is within safe limits. main...

The electricity demand in the world is increasing rapidly, so technological advances have focused on developing systems that can supply energy a safe, reliable, and environmentally friendly way. Likewise, access to of isolated communities countries plays fundamental role improving quality life their inhabitants. In this context, Microgrids become potential alternatives provide locations Ecuador where National Interconnected System does not reach. work, an Energy Management (EMS) for MG based...

Induction and synchronous machines have traditionally been the first choice of automotive manufacturers for electric/hybrid vehicles. However, these conventional are not able anymore to meet increasing demands a higher energy density due space limitation in cars. Flux-switching PM (FSPM) with their high very suitable answer this demand. In paper, conversion loop technique is implemented on FSPM time. The powerful tool visualization machine characteristics, both linear nonlinear. Further,...

The applications of direct current are limited in medium and high power systems because the problems switching. In this paper, a circuit multi-stage dc hybrid switch is proposed for medium-power (10kW) highly-inductive systems. Based on switching strategy, slow method further studied limiting overvoltage to semiconductor devices. feasibility circuit, 10 kW inductive DC system verified by both simulation prototype tests. limitation potential concept higher power-level additionally discussed.

In robotic applications, multiple one-degree of freedom electromagnetic actuators together with gearboxes are used for mimicking the degree motion profiles human limbs. However, this results in heavy and bulky robotics. A lighter alternative can be provided by use spherical directly driven human-like joints. These have a relative similarity to joints also provide degrees without gearboxes. Existent actuator prototypes cannot deliver yet required torques therefore development accurate fast...