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This paper presents a new method for designing the weights used for development of robust controllers for a quadrotor model with parameter uncertainty. The weights alongside the controllers are developed for attitude and altitude tracking by resolving a constrained non-linear minimization problem formulated over the conventional mixed sensitivity optimization S over T method. The optimization routine...
Power system stabilizer (PSS) is extensively used to enhance the angular stability by providing damping to the generator's oscillation. An electric torque is enforced in the rotor shaft in phase with the speed variation to provide this damping. In this paper a PSO based Robust Power System Stabilizer (RPSS) design has been proposed depending upon mixed sensitivity based H output feedback control in...
This paper proposes three novel dual-stator flux-modulated permanent magnet (DSFMPM) machine concepts, which are particularly suitable for direct-drive applications with the virtue of their high torque density and low operation speed. The dual-stator configuration can help improve the use of inner cavity space, and achieve higher torque density comparing with the single-stator counterparts. Moreover,...
In this study slip permanent magnet couplers (slip-PMC) for wind turbine application are introduced and their analysis technique used in finite element method (FEM) is presented. Two optimization methods are employed in determining optimum permanent magnet (PM) rotors for a fixed wound rotor size. The machine topologies, namely surface-mounted and spoke-mounted PM rotor topologies are evaluated against...
This paper investigates the use of the Taguchi method based regression rate optimization method for the design of line-start permanent magnet motors. A weighted factor multi-objective (MO) technique is used to take into account both steady-state and transient performance objectives. To validate the proposed method a prototype machine has been designed, constructed and experimentally evaluated. It...
Interests in using rare-earth free motors such as switched reluctance motors (SRMs) for electric and hybrid electric vehicles (EV/HEVs) continue to gain popularity, owing to their low cost and robustness. Optimal design of a SRM, to meet specific characteristics for an application, should involve simultaneous optimization of the motor geometry and control in order to achieve the highest performance...
In this paper, we investigate rotor and stator designs of interior permanent synchronous motors for variable speed/load applications to reduce the carrier harmonic losses caused by pulse width modulated inverters. The rotor core and magnet shapes are determined by an automatic optimization method using electromagnetic field analysis that considers the inverter carrier. Appropriate stator-winding configurations...
Model predictive control (MPC) has become a hot research topic in applications. The combination of continuous control set MPC (CCS-MPC) and pulse width modulation (PWM) can achieve high-performance while overcoming the drawback of the uncertain switching frequency of finite control set MPC (FCS-MPC). Based on the Field-oriented control (FOC), this paper proposes the CCS-MPC current control method...
Permanent magnet synchronous machines (PMSMs) have been used in many applications due to their outstanding advantages such as high torque/power density, high efficiency, light weight and good reliability. However the emerging field of electrical traction gave arise to issues which were in general hardly considered in the past Yet, even though well established methods for eDrive control are available,...
This paper compares performances of fractional-slot concentrated-wound (FSCW) and distributed-wound (DW) interior permanent magnet (IPM) machines when they are equipped with various commonly used rotor topologies such as V-type, double V-type, flat-type, double flat-type, and spoke-type magnets. In order to have a fair comparison, a multi-objective design optimization procedure based on an evolutionary...
In this paper, reluctance synchronous machines are designed and optimised to operate in the 5 MW power range for the implementation as wind generators. It is shown, when assuming no rotor deformation, that reluctance synchronous generators can be comparatively designed to operate in this power range with power factors higher than 0.8 achieved. In order to further improve the machine performance, an...
This paper proposes a new design of high-temperature starter-generator with external rotor to be installed on high pressure shaft of aircraft engine to implement More Electrical Engine concept. The basic materials to make this starter-generator were selected and justified. Multi-criteria optimization of the developed design was performed using a genetic algorithm and Pareto method. The optimum (in...
Motor drive operation mechanism of High-Voltage Circuit Breaker(HVCB) need permanent magnet synchronous motor(PMSM) with high-dynamic response. Reducing the rotor inertia of PMSM is one technique to realize high dynamic response of the motor. By digging holes in the rotor, the inertia can be reduced. The influence of shape, position and size of inertia-reducing holes on the performance of PMSM is...
State estimation of induction machines may be a difficult problem, due to the non-linear behavior of theirs. For non-linear state estimation, the unscented Kalman filter (UKF) is a well-known extension of the linear Kalman filter. Operation of the UKF algorithm strongly depends on the process and measurement noise covariance parameters of the estimator. Determination of these parameters is not straightforward...
The problem studied in this paper and described in the literature is determining the fundamental frequency of a non-trivial signal in real-time. Using the gradient-descent algorithm, a new optimized method for fundamental frequency evaluation was proposed. The comparison between the two methods, classic and optimized, was carried out by utilizing a sine, square and amplitude modulated wave as input...
A novel maglev wind yaw system (MWYS) with two groups of suspension windings is proposed to replace the traditional gear-driven yaw system of horizontal-axis wind turbines. In order to overcome the power difference between these two groups of suspension windings which could affect seriously the suspension stability, the windings optimization is carried out to decrease this difference. First, the dynamic...
Conventional model-predictive control (MPC) achieves good steady-state performance and quick dynamic response. However, a lot of calculations are needed when deciding the best voltage and objective function selected process needs time-consuming tuning work. To solve these problems. In this paper, the objective function of predictive control is analyzed for asynchronous AC motor. By means of mathematical...
This paper presents a multi-objective optimization of HS-PMSMs (highly-saturated permanent magnet synchronous machines). In addition to typical optimization objects, such as cost, torque ripple, machine losses, power, etc., the capability to control the HS-PMSMs using self-sensing methods is considered. Instead of static magnetic anisotropies, which are commonly used for low-saturated PMSMs, dynamic...
Doubly fed induction generators (DFIGs) are commonly used in wind turbines. The rotor tied to the grid DFIG topology can improve the efficiency of DFIGs as a result of reduced core losses. In this paper, a design process for rotor-tied DFIGs is outlined. The design process involves the calculation of the machine dimensions and parameters, finite element analysis (FEA) to evaluate performance and optimization...
In this paper the pareto front of flux reversal machines regarding torque, torque-ripple and normal forces is determined. For this reason a fast, but accurate, analytical calculation method is provided. An optimization procedure is given to realize an optimal design for each topology.
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