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The present paper presents an analysis regarding the influence of the form and arrangement of permanent magnets on the value of the cogging torque for a surface permanent magnet synchronous motor, designed for the direct drive of the wheels of a vehicle. There are taken into consideration influences caused by: the constructive form of the magnets, the ratio between the pole-arc and the pole-pitch,...
The electromagnetic complex phenomena inside electrical machines make the determination of specific mathematical models rather laborious. Often, the electrical machine analysis is made based on simplified assumptions according to which iron losses are neglected and iron permeability is considered infinite. Thereby, the whole magnetic energy, on which is based the entire electromechanical conversion,...
The Value Analysis Method provides two ways of improving a product or service: reducing the production cost and improving the performance of the product/service by identifying potential development directions. In the present paper the authors describe the characteristics of the functional analysis phase in the Value Analysis methodology for the electrical engineering products area. Also, they propose...
Diversification of tests and measurements for inspecting the state of the transformer unit insulation in operation, in order to establish the maintenance optimal strategy for increasing the safety in operation of this equipment, requires new diagnosis methods and insulation condition assessment like the recovery voltage method (RVM) and the polarization and depolarization current (PDC) measurement...
This paper describes a computer added system for monitoring and control for inland and offshore drilling rig applications. LabVIEW graphic oriented software provides a flexible and reliable support for SCADA. World wide drilling is developing for oil, gas or water resources and is demanding computer added monitoring and control for correct exploitation and safe use. This applied engineering software...
The authors aim to analyze different types of motivation and the methods of maintaining motivation throughout the learning process for both students and professors, in terms of the characteristics of the Bologna process, whose central concept is "the student — a partner in the educational process". The paper is based on a significant amount of literature which analyzed motivation theories...
The paper presents a FEM numerical model of a permanent magnet synchronous motor used in electrical vehicles. The motor is mounted directly on the vehicle wheel and has 2p=28 poles, Z=21 slots. The stator winding is made of field coils wound around each tooth. This configuration allows obtaining high torques at low speeds, reduced motor size, high efficiency, short end coils, high slot fill factor...
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