The purpose of the paper is the investigation of possibility of utilization of a single-phase induction machine, designed and normally operating as a single-phase capacitor induction motor, as a self-excited single-phase induction generator, which can be used to generate electrical energy from non-conventional energy sources. The paper presents dq model of the self-excited single-phase induction generator for dynamic characteristics simulation and steady-state model based on double revolving field theory with two phase symmetrical components – a forward and backward revolving field for performance of the generator under resistive load. Excitation and load characteristics obtained by simulation showed considerable influence of method of capacitor configuration in the load stator winding on terminal voltage, current and output power of the generator under load. An specific construction of the stator windings together with capacitor requirements to obtain nominal output power at desired self-regulating terminal voltage over the operating range will be the aim of further research.

The paper presents a modelling mathematical tool for prediction of dynamic and steady-states operation of the single-phase capacitor induction motor for different values of the capacitor capacitance and different frequency of voltage supply at no-load and rated load conditions. Developed mathematical model of the capacitor induction motor was implemented for calculation using Matlab/Simulink software. Presented simulation results may be utilized to achieve better starting quality of single-phase capacitor induction motors.

In the first part of the article, Krzysztof A. Makowski describes how the idea of granting Poland the opportunity to host the 23rd International Congress of Historical Sciences in 2020 in Poznań came about and how Poznań’s application to host the Congress was prepared. Moreover, the author presents the ongoing preparations for the Congress. In the second part of the article, Ewa Domańska discusses the origins and evolution of the idea of “alter-native modernities” and “epi- stemic justice” as leitmotifs of Poznań’s application. She stresses the need and importance of developing an intellectual alliance of East-Central European countries and lists activities that could help raise the region’s status as an important centre of knowledge building.