Torsional vibrations and resonance problems with synchronous machines are most frequently encountered in rotor systems with long shafts and large inertias constituting a weakly damped mechanical resonator which exhibits a low resonance frequency. It is impossible to obtain a effective mechanical damping for these torsional vibrations, but by using a power electronics device and an inductive or ...

When high power electrical machines are required, an increase in the mechanical frequency and/or number of poles is suggested. The analyzed electrical machine produces a high torque density due to a concentrated winding arrangement, in combination with the increased width of the stator teeth. It is a permanent magnet synchronous generator, [1] and is intended for operation at high speed and hig...

The most basic electrical machine that converts mechanical energy into is synchronous machines. Synchronous machines can be operated at high speeds and low for different power plants. In terms of system planning, it important to examine the operating characteristics idle variable load conditions in these cycles. It very generators, which are components turbines plants, have efficiency when they...

The purpose of this work is to determine the values electrical parameters synchronous and induction machines validate interactions between an generator a generator. generators are connected in two ways: (i) isolated from common bus (ii) parallel steady state, subject nonlinear load. They old refurbished machines; thus, parametric regression methodology used parameter values. After computational...

Synchronization has gained attention in science recently. In electrical engineering, a power network requires generators and loads to be in synchronization. The increase in distributed dc power sources without sophisticated controls has made synchronization more difficult. This paper proposes a synchronous inverter designed for linking distributed power sources within a power network. The linka...

The air-gap of electrical machines may become non-uniform due to low accuracy of the manufacturing machinery, in assembling processes, or by aging. Detection and monitoring of this phenomenon is very important and of interest. There are several methods to model non-uniform air-gaps and to detect them by monitoring systems. One of the most widely used methods is by the analysis of the line curre...

this paper presents the application of radial basis neural networks to the development of a novel method for the condition monitoring and fault diagnosis of synchronous generators. in the proposed scheme, flux linkage analysis is used to reach a decision. probabilistic neural network (pnn) and discrete wavelet transform (dwt) are used in design of fault diagnosis system. pnn as main part of thi...

this paper presents a novel salient pole synchronous generator i.e. permanentmagnet-assisted salient-pole synchronous generator (pma-sgs). due to saturationof conventional synchronous generators (sgs), permanent-magnet-assisted salientpolesynchronous generators (pma-sgs) are presented. pma-sgs are a new type ofsalient-pole synchronous machines with extra permanent magnets (pms) betweenthe adjac...