In this paper the authors outline the performance and modelling of a prototype linear tubular permanent magnet machine with an air cored stator. The main application of the machine is in direct drive marine energy conversion systems, where speeds are typically in the region of 0.5 m / s . A simple analytical method was derived to provide an initial design of a prototype machine, which was then ...

superconducting materials are capable of trapping extremely high magnetic fields. this property and meissner effect of superconductors causes a levitation force between bulk superconductors and a permanent magnet (pm). this levitation force has possible industrial applications such as permanent magnet guideways (pmg). because of the high price of permanent magnets, the optimization of pmg desig...

The paper describes winding failures in Permanent Magnet Synchronous Motor (PMSM) which are preferred Electric Vehicles. Drive can be designed with fault tolerance to continue operate under occurrence of faults. Winding insulation failure is responsible for some the most serious A method detecting open circuit winding, short or turn may result as a presented. Further technique continued post-fa...

<span lang="EN-US">This <span>paper aims to develop the sliding mode control (SMC) scheme in sensorless permanent magnet synchronous machine (PMSM) drives replace conventional proportional integral (PI) speed control. The SMC is formulated based on surface of error. And error corrected concept Lyapunov stability. designed with load torque observer so that disturbance can be estimate...

In this paper, an analytical analysis is presented to calculate air gap flux density distribution, thrust and efficiency in air-core permanent magnet linear synchronous motor with Halbach array based on Maxwell equations. In order to improve mean thrust, thrust ripple, magnet and copper consumption, the main design parameters of analyzed machine are optimized by using genetic algorithm in an ap...

In this paper a brushless permanent magnet motor is designed considering minimum thrust ripple and maximum thrust density (the ratio of the thrust to permanent magnet volumes). Particle Swarm Optimization (PSO) is used as optimization method. Finite element analysis (FEA) is carried out base on the optimized and conventional geometric dimensions of the motor. The results of the FEA deal to ...