This paper describes the calculation of torqueina brushless permanent-magnet line-start a.c. motor by means of the ~~UX-MMF diagram in combination with the finite-element method. Results are compared with measured ~~UX-MMF diagrams, with shaft torque measurements, and with torque calculated using the classical phasor diagram.

Redundant flux-switching permanent-magnet (R-FSPM) motor is a new fault-tolerant machine having PMs in the stator, offering high efficiency, high reliability, and robust structure. This paper proposes two remedial control strategies for fault-tolerant operations of the R-FSPM motor drive in the single-channel (SC) mode. First, by doubling the healthy-channel currents, the reduced torque due to ...

Alisfraci -The flux distribution and static force of a novel the magnets, I t is the Iength of thc coil sections, I is thc bnishless dc linear motor were calculated by 3d finite element analysis. An analflical model to increase the force to volume armature current, ic is the active conductor length vector ratio of the motor was validated by the numerical analysis as for each side of the mil and...

The paper develops a power factor correction mechanism for a brushless dc permanent magnet (BLDC-PM) motor drive system through the use of a front end boost converter. It evolves a wave shaping mechanism to arrive at the sinusoidal nature for the input current in an effort to improve the input power factor. The theory is articulated using a closed loop algorithm to revolve around the operating ...

Brushless DC motor has a rotor with permanent magnet and has no mechanical commutator which leads to many advantages like less maintenance, long life, high reliability, low inertia, low friction and low noise. Since the brush system/commutator assembly is replaced by an electronic controller which can be easily integrated into other required electronics, thereby improving the effective power to...

This paper describes the experimental study carried out on a Permanent Magnet Brushless DC (PMBLDC) Motor drive coupled to a pump load powered by photovoltaic (PV) array I for water pumping system. A simple low cost prototype controller has been designed and developed without current and position sensors which reduces drastically the overall cost of the drive system. This controller is used to ...

Axial flux ironless permanent magnetic synchronous motor (AFIPMSM) is a new permanent magnetic motor. It has many advantages, such as little volume, low mass, low lost, high power density, no cogging torque, and the sinusoidal back EMF. It gradually becomes the good choice in drive system. However, because of the coreless structure and the long air gap, the winding inductance is small, which ca...

_ Speed control of permanent magnet synchronous motor (PMSM) using Direct Torque Control has rapid response and good static and dynamic performance but less accurate since current, torque and flux linkage wave forms contain big ripples. To overcome these disadvantages stator flux linkage and rotor speed are estimated using Extended Kalman Filter. Therefore, sensorless speed control of surface p...