This paper deals with the analysis of spatial harmonic components in multiphase single or double layer windings. It describes the methodology for magnetic field synthesis in the air gap and verifies the results on a five-phase induction machine using finite element method. The conc...

The paper briefly discusses simplified proposal of the design methodology, which suites for wireless power transfer system development. For this purpose, the most important aspects related to standards and regulations are initially discussed, while focus is given on automotive segment, i.e. ...

The paper proposes design procedure of several types of current sensors. The winding design is analyzed regarding its impact on operational characteristics and evaluated for preferred application. The paper also discusses the measurement results and given frequency characteristic and quality fact...

A novel control method based on model predictive control (MPC) dedicated to dual inverter (DI) control with minimization of switching losses is introduced. Optimal compromise between switching losses and current tracking error is reached by enlarging of the predicted steps count. The co...

Recently proposed model predictive acoustic control of an AC drive relies on availability of the transfer function from the drive current to acoustic pressure. Since such model is typically not available, we propose to consider its parameters to be unknown and use methods of B...

This paper proposes new soft-switching interleaved boost converters (SSIBC) for photovoltaic power generation systems. The SSIBCs presented comprises with additional dual and single auxiliary cells. The main active switches of these converters are able to provide zero voltage switching (ZVS) and&...

MV distribution grids are often operated with arc suppression coils compensating dominating reactive fault current component when single-phase ground fault occurs. The paper deals with an active compensation in emulated distribution grid of 10 kV performed by a proposed three-phase active fa...

The paper proposes a design procedure of a current sensor. The winding design is analyzed regarding its impact on the operational characteristics and is evaluated for a preferred application. The paper also discusses the measurement results and given frequency characteristic and quality ...

A new modular low-profile indirect frequency converter is introduced. If fulfills several criterions as mechanical dimensions to fit standard 1U height 19” rack enclosures, energy recuperation, high power factor, high switching frequency and air cooling and high computational performance and conn...

Acoustic noise is an issue associated with operation of electric drives. Using an inverter in variable speed drives usually increases the acoustic noise. The problem has been recently addressed using finite control set model predictive control, where the acoustic model of the drive ...

This article focuses on design and construction of voltage inverter for front traction of electric formula car, built at the University of West Bohemia in Pilsen. Front traction system consists of these two inverters for both electric motors wheels, (one per motor). These parts...

This paper presents a fault diagnosis scheme for induction machines (IMs) using Support Vector Machine (SVM) and Random Forests (RFs). First, a number of timedomain and frequency-domain features are extracted from vibration and current signals in different operating conditions of IM. Then,&#...

This paper describes the construction of a test bench usable for testing of non-standard electric machines, i. e. electric machines with non-standard mounting interface, rated speed etc. The test rig is adopted to use a standard induction machine as a load for tested machines ...

In the paper, electromagnetic and vibration analyses of traction electric machine exhibiting static and dynamic eccentricities is performed. The machine is a highspeed permanent magnet synchronous motor with surfacemounted permanent magnets and double-layer concentrated winding. The machine is intended...

This paper deals with the injection of higher harmonics in a nine-phase induction machine. The work introduces motor parameters and describes various winding connections possible for nine-phase motor. It also presents higher harmonic components injection strategy and discusses results from finite...

The main goal of this work is in the qualification of temperature changes due to design modifications of the medium-sized turbo generator with the output power 40 MW, ie the temperature distribution of the active parts. The work summarizes of designing a number of changes ...

The main contribution of this paper is design of optimal field oriented (vector) control of a multi-winding permanent magnet synchronous motor. Three variants of vector control structures for the multi-winding synchronous motor are presented in the paper. Each of the presented vector co...

This paper deals with an experimental injection of harmonics to a stator winding of a nine-phase machine. Different combinations of the harmonic components are applied with the optimal magnitudes calculated by a linear programming to maximize exploitation of a magnetic circuit. The theo...

Inductance variation with the load can have a significant effect on the operation and control of the machine and it should to be implemented in the analytic design of the machine. In this paper a magnetic equivalent circuit (MEC) method used for the analysis of the p...

Efficiency of the power converters is an important specification that determines their success on the market, being the losses a critical part that influences greatly the operation capabilities of the converter. To analyse with the required precision, the losses of magnetic component, b...