An INTERIOR PERMANENT MAGNET MOTOR is a good option for traction application related to the induction MOTOR and switched reluctance MOTOR because of high mechanical rigidity and low deMAGNETization risk. the design of this kind of MOTOR is attractive for engineer despise the implementation cost of them in high constant speed power range (cpsr) is high. In this paper using combination of two ideas i.e. non-conventional air bridge and segmented PERMANENT MAGNET a optimal design has been proposed. In this paper non-conventional air bridge is used for reducing the PERMANENT MAGNET volume. The genetic algorithm has been applied to the goal function. Simulation results show the good performance of optimal design related the conventional design.

Background and Objectives: Due to exclusive advantages of the PERMANENT MAGNET synchronous MOTORs (PMSMs) such as large torque/power density, high efficiency and wide speed range in constant power region, special attention has been paid to these MOTORs especially for electric vehicle (EV) application. A conventional type of PMSMs which is more suitable for EV application is the INTERIOR PERMANENT MAGNET synchronous MOTORs (IPMSM). The main objective of the present paper is design optimization of this type of PMSM to increase efficiency and reduce torque ripple which are important for EV application. Methods: Using different shape design optimization methods including rotor notch, flux barrier and skewed rotor, design optimization of the delta-shape IPMSM is done and an optimized design is suggested first. One of the most important factors affecting the performance of the IPMSM is the MAGNET arrangement in the rotor structure. Based on the the design of experiments (DOE) algorithm, optimal values of some design parameters related to MAGNET are then determined to improve more the MOTOR performance of the suggested structure.Results: The simulation results based on finite element method (FEM) are provided for a typical high-power IPMSM to evaluate the effectiveness of the proposed technique. In comparison to the initial design, 7% increase of average torque, 50% reduction of torque ripple and 1.4% increase of efficiency are resulted for the optimized MOTOR. Conclusion: Using the proposed hybrid design optimization procedure (shape design optimization with optimum design parameters), significant improvement of some characteristics related to the delta-shape IPMSM including efficiency, average torque and torque ripple is resulted and this conclusion is desirable for EV application.

The main theme of this paper is to present novel controller, which is a genetic based fuzzy Logic controller, for INTERIOR PERMANENT MAGNET synchronous MOTOR drives with direct torque control. A radial basis function network has been used for online tuning of the genetic based fuzzy logic controller. Initially different operating conditions are obtained based on MOTOR dynamics incorporating uncertainties. At each operating condition, a genetic algorithm is used to optimize fuzzy logic parameters in closed-loop direct torque control scheme. In other words, the genetic algorithm finds optimum input and output scaling factors and optimum number of membership functions. This optimization procedure is utilized to obtain the minimum speed deviation, minimum settling time, zero steady-state error. The control scheme has been verified by simulation tests with a prototype INTERIOR PERMANENT MAGNET synchronous MOTOR.

In brushless INTERIOR PERMANENT-MAGNET (IPM) MOTORs there exists an oscillatory torque that is induced by the mutual interaction of PERMANENT MAGNETs mounted on the rotor and a slotted structure formed on the stator, generally called the cogging torque. This undesirable torque mainly causes vibration, position inaccuracy and acoustic noise from brushless IPM MOTORs. This paper investigates the inuence of geometric parameters on the cogging torque of brushless IPM MOTORs. An exterior-rotor brushless IPM MOTOR, with embedded MAGNET poles in a V-shape, is introduced. With the aid of commercial finite-element analysis software, cogging torque waveforms of brushless IPM MOTORs are accurately calculated. The effects of geometric parameters on the cogging torque, including MAGNET span angle of the rotor, shoe depth and shoe ramp of the stator, dummy slots notched on the stator, depth of the dummy slot and dummy slots notched on both the stator and rotor, are discussed. Ten design cases, with different values of design parameter, are presented to effectively mitigate the cogging torque. Design case X of the brushless IPM MOTOR, with dummy slots on the stator, performs better than the original brushless IPM MOTOR, with a 79.1% decrease in the peak value of the cogging torque.

Because of high energy storage capability, PERMANENT MAGNET Synchronous MOTORs are very important in electrical drive industry. Speed control of these MOTORs suffer from parameter variations such as variable inductance. In this paper, The Integral-Terminal Sliding Mode Control (ITSMC) method is used to control the speed (torque) along with d-axis current control. This method like classic sliding control is robust to MOTOR variable parameters variations,in addition, it has a higher dynamic response, and its output error in a finite time will converge to zero. In this paper, the results of simulation with Simulink/Matlab and experimental implementation of ITSMC based on a TMS320F28335 processor are presented.

In this paper a new optimization function for increasing the flux weakening range and output torque value of segmented INTERIOR PERMANENT MAGNET synchronous MOTOR (SIPMSM) is presented. In proposed objective function normalized characteristic current and saliency ratio are considered as two optimization variables during optimization process. The focus of this paper is rotor structure design such as PM segmentation technique and new flux barrier design. Increasing the constant power speed range (CPSR) of SIPMSM is done by minimization of characteristic current. This minimization leads to decreasing the output torque therefore in this paper using maximization of saliency ratio, this problem during optimization process will overcomed. For calculation resource reduction a detailed design of PM segmented and flux barriers configuration in rotor structure is carried out by simplified MAGNETic equivalent circuit of SIPMSM. The output results of proposed MAGNETic equivalent circuit which is contained PM flux linkage and dq inductances, are verified by Finite Element Method. Simulation results demonstrate that the CPSR of optimized SIPMSM has been doubled and its output torque has been increased related to the typical design.