Main focus of this work is to design a three–phase rectifier based on silicon–carbide power diodes. Main part of the article is dedicated do equations which are then used to obtain temperatures of power diode junction based on current, voltage and switching frequency. From the...

A new universal multi H-bridge converter is introduced in this paper. The main purpose of proposed universal converter is simple testing of modular multilevel topologies as CHB and M2LC topology. The whole converter is designed to fit a standard 2U ...

This paper describes results of the harmonic analysis of currents harmonic analysis performed for an advanced AC traction Substation. AC traction substation feeding 25 kV / 50 Hz traction catenary and provide power symmetrization by semiconductor device calle...

This paper presents a new zero current switching bidirectional DC-DC converter for dual voltage automotive systems. The improved version of hard-switched DC-DC converter with an additional auxiliary resonant network, which is a combination of two auxiliary switches,&#x...

The paper focus on the benefits of close integration of battery based energy storage directly into thermal plants. The attention is paid to use of the energy storage for primary frequency control in cooperation with classical steam turbine control. The model topology of the tu...

This paper is dealing with the exact measurement and calculation of the equivalent thermal conduction coefficient between the winding and the slot. The main issue is how to describe and solve the thermal conduction coefficient on the handmade wired small machine with a low slo...

The non-harmonic input voltage waveform becomes more frequent with the increasing interest in the multiphase machines

The main part of this work deals with the description of the created mathematical model for calculating the magnitude of the thermal resistance of the stator slot winding of an electric machine. The given model is able to perform calculations for several different slot shapes....

The paper deals with magnetic forces and vibration analysis of a nine-phase induction motor. It is described a method of voltage harmonics injection for reaching either the same amplitude or RMS value of supplying voltage as for the case of supplying the motor using the v...

This paper deals with the control of induction motor drive powered by 3-phase VSI with 3-phase output transformer. The drive configuration using transformer to adjust the voltage level from the converter is common for example in submersive pumps drives or in mining industry where&#...

Although many mathematical and analytical techniques have been presented to control and identify the dynamic systems, there are vast fields of research needing to be developed and extended through Deep Learning (DL) approaches. In this paper, we try to describe how intelligent controlle...

The paper presents a simple yet powerful method of efficiency mapping of induction machines. The whole calculation process is based on knowledge of induction machine equivalent circuit parameters and approximation of losses based on known dependencies on speed, current and magnetic flux ...

The main aim of this paper is to prove the importance of precision of the manufacturing process during designing and producing the electrical machine. There is made a comparison of several models and shown the dependency on the accuracy of the dimension of the stator core...

A conventional field oriented control (FOC) relies on park transform and sinusoidal back EMF, in order to tread harmonic signals as constants. As a consequence, resulting control structure based on linear PI controllers is very simple and well tested. However if the back EMF o...

The paper deals with the squirrel cage of an induction motor. Faulty connection between the rotor bar and the end-ring has a fundamental effect on the magnitude of the current of an affecting bar and surrounding bars as well. By the matrix equation is solved the curr...

Equivalent thermal circuit with lumped parameters is a frequently used method for thermal modeling of electrical machines. This paper presents an algorithm of the modular thermal model for the Permanent Magnet Synchronous Machine (PMSM). Modularity is achieved by separating geometry into sub...

Intelligent Transportation System (ITS) is a modern technology aiming to improve traffic management and modes of transport. The Long-Term Evolution (LTE) standard is a suitable protocol for wireless communication systems in new ITS applications due to its high speed capacity. In this pa...

This paper deals with the design and testing of the independent permanent magnet synchronous generator (PMSG). Maximal speed of the generator is up to 1100 rpm, but the target of the design consists of the highest speed range where the required output power 200 W is ...

This paper shows experimental results for three different methods used for a voltage synchronization to the threephase grid. Tested methods are: traditional phase locked loop using Clarke and Park transformation (SRF-PLL), dual econdorder generalized integrator phase locked loop (DSOGI-PLL) and s...

The paper describes the measurement of ovality of large induction machine rotor and the calculation of the air gap size along the rotor circumference. Also the withdrawal forces are calculated and the causes for its decline are discussed. The model is assembled and the influen...