This article presents an idea of visual connectedness measure between components in thermography images of rotating steel roller, cylindrically shaped. Both definition and method of measure calculus is given along with a short discussion.

This paper discuses practical realization of full-wave rectifiers made of electronic diodes for high current bipolar electronic loads. The presented solution minimizes the voltage drop and nonlinearity of loads in the region of low voltages. Compared to standard or Schottky diodes, electronic (also referred to as ideal) diodes exhibit very low voltage drop and power dissipation. In the full-wave rectifier, MOSFETs with very low RDSon (low units of milliohms) are used. Ideal rectifiers have been traditionally used as structural elements in switched power supplies; they are often applied in low dissipation power switches and started to be utilized as full-wave rectifiers.

In this paper a comparison of synchronization methods for power electronics converters is presented. Proposed evaluation criteria are based on Transmission System Operators requirements, as well as on criteria parameters based on requirements for design, computation and operation under normal/distorted conditions. Additionally a classification of various kinds of synchronization algorithms is discussed with a brief description of the role of power electronics in the modern power systems. All of the tested algorithms were subjected to appropriate tests validating the quality criteria for each of them. The tests were performed in terms of simulations. The investigation results are summarized in the table, which can serve as a basic selection guide.

The paper presents the results of measurements of the thermal conductivity coefficient of the selected insulating liquids according to the temperature. The value of the thermal coefficient of tested insulating liquids at temperatures from 20°C to 100°C was determined. Measurement of thermal conductivity was conducted by the use of presented authoring measurement system. The obtained results are essential to the design of power devices structures.

In the article, the Quality Management System (QMS) in heat supply is shown ashigh-quality and reliable heat supplyensuring system for consumers (in the most cost-efficient way compliant with environmental standards) and ensuring the quality assessment of functioning business. The article provides features of heat supply, as control object, and difficulties of assessing the quality of functioning business. It also provides a process approach to description and management of activity, as one of management principles in QMS.

The paper deals with the peculiarities of development of simulation model of strip pull self-regulation system in a continuous hot galvanizing line. The results of simulation modelling are provided.