Dual induction motor single inverter drives reduce installation space, weight and overall cost. On the other hand, complexity of the control increases significantly, since the condi­tion on each electric machine can vary in a wide range. Today, majority of control algorithms uses cascad...

The main goal of this paper is to analyze a low harmonic interferences of ac-dc traction converter and the influence of selected signals. In this case, the ac-dc converter is based on H-bridge topology. This type of converter is important part of a majority modern ac ...

The paper is focused on the tram input LC traction filter stabilization by the super capacitor energy storage system. The input LC filter is almost undamped resonant circuit connected on the both sides to the sources of disturbances. On the input side, LC filter is connec...

The paper deals with the comparison of SRMconverter topologies, focusing on comparing the number and the dimensioning of semiconductor elements for the medium power engine (from approx. a hundred watts to tens of kW). The paper considers basic well-known configurations (e.g. an asymmetr...

The paper deals with the experimental verification of vibration frequency spectra of squirrel-cage induction machine having implemented static eccentricity fault. The measured data are compared to the theoretical presumptions and the transient finite element analysis of the measured machine. Measureme...

This work deals with different methods of thermal modelling of the stator winding in a slot. The analyzed machine is a permanent magnet synchronous motor (PMSM). The simplified lumped thermal model and model parameters are described. The finite element methods model is set up ...

The paper is focused on a thermal model identification of power semiconductor module for estimation of junction temperature of the semiconductor elements (transistors). The model describes differences between converter baseplate temperature and temperature of each transistor in the module. The th...

The most promising technologies of energy accumulation for energy storages are mentioned in this paper. There are pumped hydro storages, compressed air energy storages, thermal energy storages and battery energy storages. These technologies are described by their principles and operational charac...

The subject of presented paper is research of impact on the change of thermal conductivity of stator lamination of high synchronous machine in axial direction. The thermal model of PMSM is calculated for different values of thermal conductivity in axial direction. The results are&#...

In this paper, a mathematical model for a prediction of energy consumption of electric buses or hybrid trolleybuses is briefly presented and two different approaches for a calibration of the model are discussed. A comparison of differently calibrated simulators is performed on the ...

One of the methods additional to finite element analysis is presented in this paper. The Schwarz-Christoffel (SC) transformation was used to the Carters factor derivation. Today, the numerical SC transformation is used to describe the air gap magnetic field and evaluate the back EM...

This paper shows how to tune control algorithm of electric drive to reduce its electromagnetic noise. The used algorithm is based on FCS-MPC (Finite Control Set – Model predictive control) and it employs filters for spectrum shaping. The algorithm is implemented, measured and compa...

This project is based on the first type of linear camera slider which makes several improves of construction and directions option of camera motion. Design of mechanical construction is focused on weight with a strong emphasis on the solidity of the rails line. The primary...

A topology of a three level neutral point piloted (NPP) is described. There are some interesting features e.q. lower switching and blocking voltages in comparison with 2L-VSC topology or soft switching of bidirectional switch, if the special PWM modulator is used. The main disadvan...

The paper deals with creating of complex model covering both electrical and mechanical models of the drive and their mutual interaction. High-speed PMSM machine is used along with 3-stage reduction gearbox. The mechanical model takes into account torsional vibration only. The complex mo...

This paper presents the implementation of feedforward optimal control of interior permanent magnet synchronous machine (IPMSM), where stator resistance is not neglected. Proposed method improves the efficiency of a drive.

The paper deals with a complete manufacture of a synchronous machinery for educational purposes. The main targets of the design is creation of a machinery which clearly shows all constructional components of used machines, its overall dimensions allow easy transportation between education&#x...

This paper describes development of stationary bike, which is able to produce and store electrical energy. Device consist of BLDC motor, used as generator, connected to stationary bike and power electronics managing the flow of the energy. Electrical energy from the generator can b...

This work deals with thermal design of permanent magnet synchronous motor (PMSM). The designed motor is the in-wheel traction motor for automotive application. The motor consists of an external rotor and inner stator with water cooling system. The thermal calculation is based on th...

This paper deals with the construction of the flux-switching permanent magnet machine (FSPM). The machine was constructed to verify finite element models. The machine itself is shortly described with all its separate parts. Complete machine is if fully operational but works ...