A dual-rotor axial field flux-switching permanent magnet (DRAFFSPM) machine is proposed. 3-phase 12/10-pole DRAFFSPM designed. The topology and operation principle of the are described in detail. power equation deduced dimensions determined. electromagnetic characteristics including air-gap distribution, PM flux-linkage, back-EMF, cogging torque, investigated based on 3-D finite element (FE) analysis. influences rotor pole width stator slot chamfer back-EMF torque investigated. It shows that...

The hybrid axial field flux-switching permanent-magnet machine (HAFFSPMM) is a novel excited with short length and high torque density, which suitable for electrical vehicle drive. However, the HAFFSPMM exhibits higher cogging than traditional machines due to doubly salient structure flux density. To reduce torque, three reduction methods by tangential displacement of stators, asymmetric rotor pole shape, segment-twisted are investigated in this paper. influences angle on output analytically...

Identification of the stator d-axis and q-axis inductances is essential for interior permanent magnet synchronous motor (IPMSM) sensorless control system. The signal injection method an effective way to identify inductance parameters; however, it requires rotor position ensure accuracy reference position. To overcome dependence on position, a sequence-pulse voltage presented. matrix least-squares fitting algorithm utilized fit current responses identification. Based method, discrete standard...

The rapid advancement of pretrained text-driven diffusion models has significantly enriched applications in image generation and editing. However, as the demand for personalized content editing increases, new challenges emerge especially when dealing with arbitrary objects complex scenes. Existing methods usually mistakes mask object shape prior, which struggle to achieve a seamless integration result. mostly used inversion noise initialization also hinders identity consistency towards...

A novel axial field flux-switching permanent magnet (AFFSPM) machine with a doubly-salient structure is developed as wind power generator. The electromagnetic characteristics of 0.6 kW, 3-phase 12/10-pole AFFSPM machine, including the air-gap flux density distribution, open-circuit linkage, EMF, and winding inductances, etc., are investigated based on 3-D finite element (FE) analysis. prototype built to test under both load conditions. theoretical analysis validated experimentally. It shows...

This paper investigates a double stator linear rotary permanent magnet motor (DSLRPMM) with orthogonally arrayed PMs. The DSLRPMM, which involves and/or movements, is constituted of two stators and hollow mover. aim this to study the electromagnetic features optimize design parameters using 3-D finite-element method (FEM). topology operating principle are described, original given. influences main designed on torque, force, total losses also analyzed. optimal given prototype built tested....

This paper proposes an indirect input-series output-parallel (I <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> SOP) dc-dc full-bridge converter system based on asymmetric pulsewidth modulation (APWM) control strategy for high input voltage applications. When a short-circuit fault occurs in dc bus, the proposed I SOP can disconnect from bus effectively and avoid filter capacitors of constituent modules discharge compared with traditional...

Axial field flux-switching permanent magnet machine (AFFSPMM) has significant advantages, such as the short axial size and high torque density. It is suitable for direct drive in-wheel applications electric hybrid vehicles. For improving reliability, a novel fault-tolerant structure applied in AFFSPMM. The stator composed of E-shaped laminated segments. phase windings are physically isolated to each other by middle teeth cores. wounded around used regulate air-gap flux proposed machine....

In this paper, a double-stator permanent-magnet motor that involves linear and/or rotary movements is investigated. The linear–rotary (DSLRPMM) constituted of two stators and hollow mover with permanent magnets affixed on its surfaces. This paper focuses the main electric magnetic features DSLRPMM. First, structure operating principles are described, original design also given. Then, electromagnetic characteristics, including fluxes, torques, forces, etc., studied owing to three-dimensional...

The purpose of this paper is to analyze ac copper losses the ironless brushless dc machine (BLDCM) used in flywheel energy storage system. influence factors losses, such as winding diameter, phase current, and speed, are analyzed. research results show that wire diameter has a huge effect on BLDCM, shunt wound structure with multiple wires method can reduce effectively. However, due induced voltage impedance unbalance, additional circulating current induced. For calculation, equivalent...

In this article, an extended two-state observer (ETSO) is proposed for the permanent magnet synchronous motor (PMSM) with uncertainties of system parameters and load torque. First, ETSO designed to estimate two states, namely control input gain lumped disturbance. The includes moment inertia stator flux linkage. Then, a speed controller online adjustment by using estimates obtained from improve tracking performance PMSM. convergence analyzed Lyapunov theory. Finally, simulations experiments...

A hybrid exciting synchronous generator (HESG) is analyzed in this paper, including its particular structure and operation principle. permanent magnet used for providing the main output a homopolar inductor alternator regulating terminal voltage. The electromagnetic field computation performance analysis of HESG are carried out by using three-dimensional finite element method. 1.5 KW, 2000 rpm to 9000 rpm, 8-pole 9-slot tested verify flux control capability. Experimental results show that it...

As the excitation system is core control component of a synchronous condenser system, its fault diagnosis crucial for maximizing reactive power compensation capability condenser. To achieve accurate faults, this paper proposes novel adaptive grey wolf optimizer (AGWO) to optimize initial weights and biases fuzzy neural network (FNN), thereby enhancing diagnostic performance FNN model. Firstly, an improved nonlinear convergence factor introduced balance algorithm’s global exploration local...

This paper investigates a homopolar inductor machine (HIM) for flywheel energy storage in electromagnetic launch applications. An equivalent 2-D finite-element model is presented to predict the behavior, and effectiveness of equivalence validated by comparison 3-D results. Based on model, rotor tooth shape then optimized achieve high fundamental value air-gap flux density given diameter. It shown that proposed can performance HIM an accurate fast way, which quite valuable design stage HIM.

A three-phase 12/10-pole axial field flux-switching permanent magnet machine (AFFSPMM) with three different stator structures, including parallel and slot (PPPS), tooth (PTPS), (PPPT), is analyzed. Based on a 3-D finite element (FE) method, the static characteristics, such as flux density, PM linkage, back-EMF, cogging torque, electromagnetic torque for structures are investigated. The influence of design parameters AFFSPMM PPPS topology has larger lower more sinusoidal back-EMF. prototype...

In this paper, a double-stator linear-rotary permanent magnet motor (DSLRPMM) for linear and/or rotary movement is presented. Since the two types of magnets are orthogonally arrayed on inner and outer surfaces mover core, respectively, influences orthogonal magnetic field (OMF) electromagnetic characteristics cannot be ignored. Based 3-D finite-element method (FEM), OMF in iron core magnetization investigated, test device constructed to verify results obtained by theoretical analysis (FEA)....

DC-biased magnetic induction can occur in homopolar inductor alternator (HIA). In this paper, an experimental method is introduced and the corresponding platform constructed to measure loss characteristics of material under induction. The curves are obtained. HIA calculated. influence structure parameter excitation current on stator core investigated. Some significant conclusions include: suffers increase relative sinusoidal induction; HIA, which quite different from conventional electrical...

The rotor eddy current losses of a Permanent Magnet-Inductor Hybrid Excited Synchronous Generator (PMIHESG) are calculated by applying numerical computation method. steady-state temperature fields the PMIHESG three dimensions FEM. predicted validated measuring temperature. significant conclusions include: vortex center on Homopolar Inductor (HI) section appears side salient pole close to field coil. density far away from coil is smaller than that two method may be improper study loss HI...

This paper focuses on the multi-objective optimization of an air-cored axial flux permanent magnet synchronous machine (AFPMSM) with segmented PMs. Support vector based radial basis kernel function is combined orthogonal design to create surrogate model between output performance and parameters a coreless AFPMSM PMs efficiently, genetic algorithm used obtain global optimal solutions decrease torque ripple increase torque. The effectiveness proposed method verified by finite element analysis.

This paper proposes an improved internal-model-control (IMC)-based proportional-integral (PI) current controller for a permanent magnet synchronous motor (PMSM) drive system to solve the parameter dependence problem. The sensitivity of conventional IMC-based PI is analyzed, which indicates that parameters mismatch would cause oscillation or overshoot. Therefore, this utilizes uncertainty and disturbance estimator eliminate impact caused by variation. proposed includes controller, responsible...

The principal methods of initial rotor position estimation permanent magnet synchronous machine (PMSM), such as high-frequency rotating signal injection and pulsating methods, are implemented by calculating the voltage equations stator winding. However, these have low adaptability to PMSMs with different saliency properties high sensitivity electrical parameter variations. In this article, an method based on dynamical PMSM is proposed solve abovementioned problems. First, a series vibration...

A double stator linear‐rotary permanent magnet motor, which has a long tuber ferromagnetic mover core with magnets (PMs) arranged on its inner and outer surfaces, is proposed for two degree of freedom drive in this study. Due to the topology mover, end‐effects, including interaction between end effects PM length, are presented analysed. Based three‐dimensional (3D) finite‐element method, influences end‐effects electromagnetic characteristics, such as flux distributions, density, force...

This paper presents a novel axial field flux switching memory (AFFSM) machine, which integrates series permanent magnet (SPM) and an additional dc winding for improving the regulation capability. The configuration operation principle of SPM-AFFSM machine are presented. design considerations SPM discussed. voltage capability torque-speed characteristics investigated by 3-D FEA. Finally, prototype is developed experimental verification. measured results verify structural validity...