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The influence of pulsed magnet heating on the maximal value of the generated magnetic field is described. The operation of pulsed generator consisting of a capacitor bank, thyristor switch and wire wound pulsed inductor was analysed. The maximum value of the generated magnetic field and pulse duration of pulsed magnet was limited by Joule heating and mechanical stresses. Using Matlab Simulink software, a flexible model for simulation of thermodynamic processes in pulsed magnet was developed. The calculated results of the maximal value and distribution of magnetic field were verified experimentally and acceptable compliance was achieved using calibrated array of four pick up inductive coils for measurements of axial magnetic field and a current shunt for pulsed current measurements.Keywords: pulsed magnetic field, wire wound magnet, Joule heating, pick up inductive coil 1. INTRODUCTION ECENTLY, PULSED magnets have been used in many scientific laboratories for fundamental and technological investigations. For this purpose, the system consisting of a capacitor bank, thyristor switch and wire wound coil is most acceptable due to the progress achieved in generator design [1]. Compact non-expensive reliable energy storage banks with adjustable energy value by the manipulation of charged voltage can be constructed using modern capacitors. In spite of alternative methods of energy storage, capacitor banks of 50-100 kJ with operation voltage 3-5 kV are the most attractive systems for the construction of pulsed generators for daily experimentation. The same can be stated for thyristor switches applicable in pulsed generators. Modern thyristors can switch current in the order of 50 kA in single mode operation, they are reliable enough, not noisy and provide good signal synchronization. Moreover, they can be connected in series and parallel to increase values of operational voltage and current [2]. The most critical part of pulsed magnetic field generator is a pulsed inductor. Pulsed inductor operates under heavy conditions due to induced mechanical, thermal and electrical overloads. Pulsed inductors are made as a multilayer wire wound coil with internal and external reinforcement. Such construction ensures sufficiently long life operation and magnetic field homogeneity acceptable for carrying out qualitative measurements. During the operation huge current induces the Joule heat in a coil winding and the operation temperature increases rapidly [3]. It influences the mechanical and electrical properties of applied materials.

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Method of evaluation of the mobile robot position according to the profile of known environment is suggested and verified. Algo-rithm of coordinates evaluation according to the profile of known environment operates reliably if deviation from real coordinates is considerable, scanner mensuration are affected using white noise and if there are several robots in the scanning environment. However it is necessary that equipment of orientation in environment should be included in mobile robot. Verification of the coordinates should be performed frequently. This procedure should be performed by control system of the robot. Ill. 6, bibl. 7 (in English; abstracts in English and Lithuanian).http://dx.doi.org/10.5755/j01.eee.109.3.177