To get X-rays out of a suitable vacuum tube, it needs to be excited by an electric discharge at a tension of hundreds of thousands of volts. Such a discharge is furnished by the induction coil and by the static induction or " influence" machine, associated in its most elegant and effective form with the name of Mr. Wimshurst. In spite of the obvious advantages of the latter type of machine over...

This thesis discusses various aspects of controlling a permanent magnet synchronous machine with a non-sinusoidal rotor flux density distribution. The transient model of the machine in the rotor oriented dq-frame is derived, including the non-sinusoidal effects. The design of current and speed controllers is also discussed. The current controller is implemented in a permanent magnet machine, in...

The paper presents characteristics of a permanent magnet synchronous machine designed for micro-hybrid electric vehicle operation. Appropriate design of interior permanent magnet machine with 36 stator slots and 8 stator poles for operation in motor and generator operation mode was investigated. Finite element analysis is employed in order to determine the machine performance. Streszczenie. W a...

M. Kelemen, I. Virgala, E. Prada, T. Lipták Faculty of Mechanical Engineering, Technical University of Košice, Slovakia Th e paper deals with Shape memory alloy (SMA) spring analysis and its possibility for usage as actuator for in-pipe machine. In the paper the inner structure of SMA is introduced. Further, the experimental analysis of SMA contractor and expander was done. From the experiments...

The electrification of war-ship propulsion system is a very attractive solution, as it provides increased safety, survivability, maneuverability, precise and smooth speed control, reduced machinery space, low operation and maintenance costs, low noise and low pollutant emission levels. In this paper the basic principles of dimensioning for warships electric propulsion motors using finite elemen...

A diagnosis system for the electric machine and the power electronics in a hybrid electric vehicle is designed, where the diagnosis system uses a map based model of the system to be monitored. Such a model gives an accurate description of the fault free system, and is therefore suited for fault detectability. However, one drawback using such a model for diagnosis is that fault isolation often r...

The coming forth of kinect technology has enabled trainers controlling cruise and operation in 3D scene by their action, but this technology isn’t applied to electric power training field yet, because this field includes many electric devices and operation regulations. This paper has firstly described the electric operation regulations as one set of operation patterns by using finite state mach...

Since several years ago, power consumption forecast has attracted considerable attention from the scientific community. Although there exist several works that deal with this issue, it remains open. The good management of energy consumption in HVAC (Heating, Ventilation and Air Conditioning) systems for large households and public buildings may benefit from a sustainable development in terms of...