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 suc...

A permanent magnet synchronous motor (PMSM) with rotor embedded segmented permanent magnet was analyzed. The structural features and flux weakening principle are introduced. The shape of the rotor is optimized to get a sinusoidal air gap magnetic density waveform and reduce the toque ripple. The whole-permanent-magnet (PM) motor and the segmented-permanent-magnet motor are compared from the asp...

Brushless permanent magnet surface inset machines are interested in industrial applications due to their high efficiency and power density. Magnet segmentation is a common technique in order to mitigate cogging torque and electromagnetic torque components in these machines. An accurate computation of magnetic vector potential is necessary in order to compute cogging torque, electromagnetic torq...

Double-sided tubular machines (DSTM) have greatly improved space utilization and power density, are widely used in tidal generation high-power electric drives, while the thrust force ripple is also significant. To get minimum cogging with maximum force, hybrid segmented PM array topology introduced to DSTM as research object for multi-objective optimization. Due constraints among parameters be ...

Hand-based biometric techniques, such as the ones based on palmprint, hand vein and hand shape, is becoming more important because of their convenience and high performance. Hand segmentation is one of the most important steps in these techniques. It is a challenge task to accurately segment hand in complex environment because of the complex background, varying illuminance and other unexpected ...

MODIFIED) A progress in development of the physics model based diagnostic and prognostic system for solid rocket motors (SRMs) of the new generation of the crew exploration vehicles is reported. The performance model (PM) of the internal ballistics of large segmented SRMs in the regime of steady burning in the presence of the case breach fault is presented. This model takes into account propell...

This paper describes a computationally efficient approach for mapping the rotor power loss in permanent magnet (PM) machines. The PM loss mapping methodology discussed here utilises a small number of time-step finite element analyses (FEA) to determine the parameters of a functional representation of the loss variation with speed (frequency) and stator current, and is intended for a rapid evalu...

For the kilometer-level electromagnetic launch system, a high-speed double-sided linear permanent magnet (PM) motor is presented in this paper. To enhance average thrust force, reduce ripple and normal force of motor, segmented trapezoidal PM shaping method proposed. Compared with conventional method, PMs achieves less ripple, greater lower manufacturing difficulty. The risk demagnetization fau...