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.

This paper reviews the current state of the double-stator PERMANENT MAGNET vernier (DS-PMV) machine technology. At first, the recent advances in PMV machines are presented. In the following, the classification of various PMV machines' configuration is elucidated. In general, this review covers the principle of better understanding of the novel PMV machines' topologies using different windings configurations, flux modulation poles and stator/rotor structures.

In this paper a sliding mode controller (SMC) is designed for a PERMANENT MAGNET ‎direct current (PMDC) motor to enhance the motor performance in the presence of ‎unwanted uncertainties. Both the electrical and mechanical signals are used as the ‎inputs to the SMC. The complete motor control system is simulated on a personal ‎computer with different design parameters and desirable system performance is ‎obtained. The experimental implementation of the motor control system by a floating ‎point DSP is also presented. The test results confirm the simulation results and ‎validate the proposed motor control system for high performance applications‏.‏

A typical passive MAGNETic bearing has been modeled and analyzed for its performance characteristics.The MAGNETic bearing studied in this work comprised of a Shaft, inner MAGNETs sleeved over the shaft, and outer MAGNETic rings. A detailed analysis has been perform on the force exerted by a PERMANENT MAGNET on the shaft nurture to restore the shaft to its equilibrium position when an eccentricity is induced between the MAGNET and the shaft. A relation between the force exerted and the displacement of the shaft from its equilibrium position has been developed hence determining a specific stiffness value.

Transverse flux PERMANENT MAGNET machines (TFPMs) are categorized as synchronous machines that benefit from having high value of torque density and capablity of accommodating high pole numbers. These characteristics make TFPMs suitable candidates for low-speed applications where high torque density value is requred such as direct drive wind turbine application.  Despite the aforementioned advantages, TFPMs suffer from intrinsically high cogging torque value which is an important concern for wind turbine application. This paper focuses on axial PM segmentation technique to minimized cogging torque of TFPM topologies. Concept of the proposed method is discussed using analytical equations and optimum segmentaion angle is formulized. Non-linear MAGNETic equivalent circuit (MEC) is adopted where the PM segmentation, armature reaction, rotor transition and iron saturation effect are carefully modeled. The results of the MEC simulation are compared with the finite element method (FEM) results in terms of accuracy and computational time. The results from the analysis indicate that the proposed MEC method is almost ten times faster than FEM with reasonable level of precision. Taguchi method is adopted as a fast-response optimization method to improve the generator torque characteristics. The results show that the cogging torque has reduced by 97% with respect to the initial design while the average torque has only dropped by 8% which is an acceptable side effect due to the significant improvement in machine cogging torque.

In this paper, a precise two-dimensional field analysis in the airgap of a PERMANENT MAGNET motor with surface mounted MAGNETs is presented. This analysis is based on the logarithm conformal transformation in which the field of the airgap of the cylindrical coordinates is transformed into the xy-coordinates, and distribution of the equivalent current density of the PM region is transformed into xy-plane by an exponential function. The results of the proposed technique have been compared with the corresponding results obtained using the finite element technique and a good agreement has been achieved

PERMANENT MAGNETs (PM), which are one of the most vulnerable and important components of PERMANENT MAGNET machines, are at risk of deMAGNETization for reasons such as overheating and corrosion. One of the most critical tasks of engineers in the industry is to prevent the machine's operation in the deMAGNETization condition and replace the machine's defective PMs as much as possible. DeMAGNETization causes linkage flux reduction, electroMAGNETic force changes, and machine heating. This paper presents a new approach for deMAGNETized PM diagnosis in a PERMANENT MAGNET linear synchronous machine using wavelet packet transform. Due to the high sensitivity to the flux changes, the electromotive force signal was selected as a detection signal. By examining this method in different deMAGNETization cases, it is determined that this method has a proper performance. In this paper, the finite element software (Maxwell) and MATLAB were used to simulate the machine and analyze the data, respectively.

Hunting is a flutter associated with the synchronous speed that gives rise to the gyro drifting errors and may cause objectionable time-displacement errors in video head wheel drives and other precision scanning systems. In this paper, dynamic characteristics of PERMANENT MAGNET hysteresis motors are presented and hunting is explained. New damping techniques have been developed using optimized eigenvalues calculation. They are calculated from LQR optimization method. In this damping method, a distinct reduction in hunting has been archived. Furthermore field oriented control result of motor is presented that have good effect on Hunting. Nearest agreement between simulated and measurement results shows the accuracy of motor model. Comparison between this paper results and other measured damping methods result are shown its success.