the performance of a brushless permanent magnet machine topology equipped with axially and circumferentially magnetised ferrite permanent magnets is presented. Simulation studies show that for smaller ratios of axial length to active length, airgap flux densities in excess of 1T can be achieved, resulting in significant improvements, in torque production and efficiency. A prototype machine is manufactured and test results confirm the predictions of the EMF and static torque.

As the Transmission Line (TL) is an important part in the power system; this paper presents the design and practical implementation of overcurrent protection for threephase TL system using Programmable Logic Control (PLC). The PLC then on-line monitring the vlaue of the load current in each phase and detect the overcurrent and simaltinouslly isolate the fault by sending an output signal for tripping the coil of the Circuit Breaker (CB). Display unit of the PLC is used for displaying the load current, in addition to alert maessage with the type of the occoured fault. The proposed contrroller program also cancel of the trip signal of the CB during a definite time of the inrush and stating load current. In addition, an automatic reclosing system for return the CB to the work when the overcurrent is released. PLC-based protection methods cost less, provides greater precision with a safe way of operation when compared with the other protection controllers system. Function Block Diagram (FBD) language is employed for implementing the proposed software controller. Simulation is made for the proposed controller via LOGO! Soft Comfort V7.0 software programs for virtual implantation of the program before downloading to the PLC.