The subject of the presented paper is research on possibilities of using of oil spray cooling for small traction motors. This paper is dealing with the measurement and evaluation of the type and ideal oil pressure to get the highest heat transfer coefficient. The application&#...

The paper deals with the detailed analysis and electromagnetic design of coupling elements for wireless power transfer with compensation realized only on the primary side. It summarizes the basic mathematical description of series-none resonance coupling and maps basic operational properties. The...

The paper deals with the design, implementation and experiment of an embedded drive system diagnostics for interior permanent magnet synchronous motor drive for safety critical applications. The drive is intended for traction drive applications therefore it uses a combination of a digital&#x...

In this paper we deal with predictive control of Interior Permanent Magnet Synchronous Motor (IPMSM) drive. The main goal of this paper is to improve produced torque quality by using precise mathematical model of IPMSM, which takes into account anisotropy of the motor construction....

This paper is concerned with topology selection, and description of operating states, for the next generation of AC 25kV traction substation (TSS) with electronic advanced rail balancer (ARB). The first part describes the commonly used TSS topologies and their properties. The second par...

Identification of thermal model parameters using multi-step prediction is proposed. Even in the case of a linear model, the multi-step prediction is a non-linear complex function, hence we use techniques of deep learning for its identification. Specifically, we use stochastic gradient descen...

The paper describes the design of a converter for use in automotive industry and it is designed as a so-called “Full SiC” converter. It aims to develop a traction converter with a high-power density of 100 kW/l, which brings the parameters close to the goals of ...

This paper proposes a new non-isolated bidirectional dc-dc converter (NI-BDC) with an auxiliary resonant network (ARN) that is typically operated in both boost and buck modes. Regardless the direction of power flow, soft-switching capabilities such as zero voltage switching (ZVS) and zero&#x...

A new generation of binary input/output card for a modular control system is introduced in this paper. The primary purpose of the proposed binary input/output card is high integration of the number of 32 binary input and output channels. The individual binary channels are...

This paper describes the results of the model study for traction system 25 kV / 50 Hz, which is built on an advanced traction substation with a rail active balancer and phase shifting device. The first part of this paper is described traction substation topology with...

Power installations based on power converters in power transmission and power distribution require real-time control which is usually implementing using multiple control units. Therefore, very fast data exchange within constant sampling periods across whole control system is needed. This paper de...

The main traction power converter of a trams is connected to DC trolley wire by input LC filter. The tram input LC filter is almost undamped resonant circuit, which is often loaded by the motor constant torque command. Sources of the input LC filter oscillation may b...

This paper deals with the simplified economic evaluation of the peak shaving by a battery-based energy storage system in plants with cyclic load profile (typically steel plants) and its own electrical energy source – typically the steam turbine. There are several possible motivations&#x...

Algorithm for evaluating eddy current losses in surface-mounted permanent magnets situated in synchronous machine is discussed in this paper. Whereas variable air gap permeance causing a ripple of magnetic flux density produced by permanent magnets is considered the main source of these ...

This paper describes the results of the model study for traction system 25 kV / 50 Hz, which is built on an advanced traction substation with a rail active balancer and phase shifting device. The first part of this paper is described traction substation...

A new generation of binary input/output card for a modular control system is introduced in this paper. The primary purpose of the proposed binary input/output card is high integration of the number of 32 binary input and output channels. The individual binar...

This paper proposes a new non-isolated bidirectional dc-dc converter (NI-BDC) with an auxiliary resonant network (ARN) that is typically operated in both boost and buck modes. Regardless the direction of power flow, soft-switching capabilities such as zero voltage switching (ZVS) and zero&#x...

Designing power amplifiers based on the demanded power and frequency is one of the challenging processes of circuits design in electrical engineering. This is best understood when it comes to thermal noises and other unwanted agents. This is why the application of cloud-based metho...

In this paper, a modified microstrip branch-line coupler (BLC) at 1.6 GHz is designed and simulated. The proposed BLC consists of open stubs and resonators together. The designed BLC correctly works at the operating frequency and suppresses 2nd up to 13th unwanted harmonics. The&#x...

Single-phase ground faults are the most common faults in medium-voltage distribution grids. High-impedance grid grounding using a special four-leg transformer is discussed in the paper. The transformer’s zero-sequence impedance differs from positive-sequence impedance and it is designed to compensate ...