Abstract—This paper presents a several diagnostic methods designed to electrical machines especially for permanent magnets (PM) machines. Those machines are commonly used in small wind and water systems and vehicles drives. Those methods are preferred by the author in periodic diagnostic of electrical machines. The special attention should be paid to diagnostic method of turn-to-turn insulation...

A comparative study of the various methods for design of an induction motor is presented. This deals solutions of a large number of non-linear equations and consequently some modifications of the methods have been suggested for use in practice. Modifications of the gradient theory, dynamic programming and statistical search is also made for optimal design. Besides, dual criteria optimization pr...

In a conventional three phase Brushless DC machine with 120° electrical conduction, Harmonics and commutation torque ripple occurs because of changeover of load current from one phase to another at every 60 electrical degrees. This paper presents techniques for diminishing the harmonics and torque ripples in sensor Brushless DC motor. This torque ripple reduction techniques based on voltage con...

Using electrical machine in conventional vehicles, also called hybrid vehicles, has become a promising control scheme that enables some manners for fuel economy and driver assist for better stability. In this paper, vehicle stability control, fuel economy and Driving/Regeneration braking for a 4WD hybrid vehicle is investigated by using an electrical machine on each non-driven wheels. In front ...

The architecture of a back-to-back converter, needed to feed the rotor windings of a 3-phase doubly-fed induction machine and such that power can flow both ways, is described, from both the modelling and experimental viewpoints. In particular, a PCHS model using selected GSSA variables is described in detail. Some new and improved results concerning the detailed PCHS structure of a GSSA expansi...

We review existing machine condition monitoring techniques and industrial automation for plant-wide condition monitoring of rotating electrical machines. Cost and complexity of a condition monitoring system increase with the number of measurements, so extensive condition monitoring is currently mainly restricted to the situations where the consequences of poor availability, yield or quality are...

The paper is concerned with the application of the Support Vector Machine to the discovering of the parametric fault in analog electrical circuits. The recognition of fault is based on the measurements of the accessible terminal voltage and current of the circuit at the set of frequencies. The SVM network fulfills the role of the recognizing system and of the classifier. The numerical results o...

The aim of this work was to compare the effects of freezing rate on electrical conductivity of potatoes, carrots and apples. Electrical conductivity tests were conducted on a custom ohmic cell while samples texture was measured by means of a universal testing machine. The raw un-pretreated samples were used as control. This study showed that freezing pre-treatments lead to differences in electr...

In this paper is presented an analysis method of electrical circuits, more exactly nodal method, in order to compute the temperature field distribution necessary to the heating and ventilation systems of electrical machine. As analysis method, the modified nodal method was used which does not impose any restriction at the circuit structure, being a prevalence of the nodal method. For this reaso...