An active power filter (APF) plays an important role in compensating the harmonic component of a nonlinear load current. In this paper, deadbeat control (DBC), which has high performance and fast dynamic response, is used as current controller for APF. improved DBC (Imp_DBC) introduced to suppress adverse effect sampling error enhance interference rejection capability system. The characteristics conventional Imp_DBC are analyzed using transfer functions discrete-time domain. robustness...

The three-dimensional (3-D) linear analytical comparison is made for axial flux machines (AFMs) with surface-mounted non-layered/layered and segmented Halbach magnets. Using a 3-D subdomain model method, the equations in terms of scalar potential different subdomains are solved. In addition, magnet parameters optimized to enhance performance AFMs. It well demonstrated that AFM radially layered unequal-height magnets exhibit better than other arrangements. Finally, proposed predictions...

A three-dimensional (3-D) analytical model with a high computational efficiency is proposed for surface-inset axial flux machine (SIAFM). Accounting the air-gap fringing field, 3-D used to compute magnetic field in SIAFMs conventional, Hat- and T-shaped Halbach arrangements. Based on linear superposition method, scalar potential equations different regions boundary condition are obtained. On this basis, electromagnetic parameters can be derived. To demonstrate advantages, optimization...

The model of a magnetic field inside the permanent magnet spherical stepper motor is developed using integral equation method (IEM), and discrete expressions for distribution are also derived. results IEM finite-element show effectiveness advantages computation on motor.

In this article, two kinds of dual-layer segmented Halbach arrays have been proposed for permanent-magnet (PM) brushless machines. The analytical expressions magnetic fields due to the inner-/outer-layer magnets separately obtained. For maximal flux density in air gap, optimal magnet segment radian ratios or magnetization angles each array analytically determined separately. induced back electromotive force and electromagnetic torque prediction results show that optimized performances...

Nowadays, studies of the control brushless dc motor (BLDCM) are mainly focused on state. However, it may also work in generator Current hysteresis (CHC) is very suitable for control, because can directly current. In this paper, a multimode CHC BLDCM and state presented. It not only complete commutation successfully but reduce torque ripple. Moreover, novel transition method based background with fast response proposed to carry out processes simultaneously. Finally, effectiveness...

The split ratio, defined as the outer radius ratio of magnet to stator, has been investigated and optimized in surface-mounted permanent (PM) machines having conventional/novel pieced Halbach array. air-gap magnetic field PM machine with novel analytically obtained. influences arc length on torque density have separately for conventional In order achieve maximal magnetized machines, optimum and/or pole addition, one or both magnetization angle determined. Finally, linear analytical...

General analytical optimization model has been proposed for brushless surface-inset permanent magnet (PM) machines having even-/odd-segment Halbach array. The air-gap magnetic fields have analytically obtained by solving the matrix equations of subdomain model. For maximum field, electromotive force (EMF), and electromagnetic torque Halbach, optimal pole-arc ratio each segment, and/or magnetization angle side-magnet determined. Taking 16-pole/21-slot with three-/four-segment array as...

In this article, a linear analytical model has been proposed for solving and optimizing the magnetic fields in brushless permanent magnet (PM) electrical machines having eccentric surface-inset magnets. Using subdomain with an equivalently split method, on basis of superposition, have analytically obtained optimized PM assumed materials Halbach Moreover, induced phase electromotive force instantaneous electromagnetic torque also derived. Compared conventional concentric models, exhibits good...

An analytical technique for predicting and optimising the open‐circuit magneticfield in brushless surface‐mounted permanent magnet (PM) machines with noveltwo‐segment Halbach array has been presented. For maximum fundamentalair‐gap flux density, optimal magnetisation angle analyticallyderived. The effect of rotor core on fundamental air‐gap density inthe machine investigated. In addition, proposed analyticaltechnique can also predict induced back‐electromotive force theelectromagnetic...

A 4.8 MV impulse voltage generator and current generators are used to perform lightning simulation on the Z11 helicopter radome. The radome system is composed of diverter strips, air data probe a 0.5 m long metal structure attached simulate body. test facilities, process results presented according Chinese CCAR27 standard. This improved considerably protection performance by optimizing diverters. resulted in successful passing ground simulated requirements.

Output performance optimization of a hybrid excitation claw-pole alternator is presented using three-dimensional (3-D) magnetic equivalent circuit (MEC) method taking the nonlinear properties iron into account. A 3-D MEC model presented. On this basis, dimensions permanent magnets and output currents are optimized genetic algorithm results

The model of magnetic field inside the permanent magnet spherical stepper motor is developed using integral equation method (IEM) and discrete expressions are also derived. results by IEM FEM show effectiveness advantages for computation on PM motor. Based distribution, a torque modified Maxwell stress tensor method. formulation in case one phase electrified given torque-angle characteristics arc Comparisons with computed virtual work demonstrate analysis

The conventional consequent-pole flux reversal (CPFR) permanent magnet (PM) machine has a poor torque performance. In order to increase the performance, an analytical subdomain model is proposed and developed for CPFR with three-piece Halbach magnets over tooth-tips. Based on presented model, general solution expressions of vector magnetic potential equations all subdomains can be obtained. According interface boundary conditions, specific coefficients determined open-circuit...

A novel way about nonlinear regression modeling of the claw-pole alternator oriented to computer-aided design (CAD) with support vector machines (SVM) is presented in this paper. The training samples are rooted severe finite element model (FEM) simulation. Parameter optimization also presented, which based on chaos and uses SVM as objective function. This integration preserves benefits chaos, where high efficiency might be very useful for finding optimal structure parameter.

This paper presents a novel way about nonlinear regression modeling of the claw-pole alternator oriented to computer aided design (CAD) with support vector machines (SVM), which is bused on severe finite element model (FEM) simulation. Parameter optimization also presented, based genetic algorithm (GA). AS compared method chaos used in parameter synchronously presented

Based on the conventional flux reverse permanent magnet (FRPM) machine, stator slot FRPM machine with iron between Halbach magnets is proposed and analyzed. Through finite element analysis, maximum back-electromotive force amplitude taken as optimization objective, thickness magnetization angle are variables to optimize machine. Finally, air gap density, back electromotive force, electromagnetic torque of compared those The results show that performance better than

Induction machines with conventional skewed rotor have lower starting torque compared non-skewed induction motors. In order to improve the electromagnetic torque, an motor two different doubly rotors was proposed in this paper. The fundamental and harmonic are analyzed by virtual displacement method. Theoretical analysis shows that both without middle ring (DSRIMWOMR) (DSRIMWMR) can efficiently reduce torque. reduction of ripple. validity analytical method verified a large number three...

This paper presents a mixed grade magnet model for surface-inset machines considering the thickness. In polar coordinates, on basis of Laplace/quas i-Poisson equations and boundary conditions, constructed matrix are solved air gap magnetic field in machine is derived. Taking an 8-pole/12-slot motor as example, through presented optimization process, optimized thickness, remanence magnetization angle. addition, back-EMF electromagnetic torque analytically obtained. The results show that...

The successful design of the cost-effective electric driver system for hybrid vehicle (HEV) depends chiefly on high efficient PWM converter and advanced control strategy. Based visual simulation software MATLAB/SIMULINK, DC motor its composed different switch devices were modeled simulated under various working pattern frequency. self-tuning modifying algorithm based fuzzy was introduced to model percentage integral factor speed controller system. Compared with traditional algorithm, this...