Sergey A. Kharitonov

A principle of calculation dynamic and static power losses with hard-switching IGBT

This paper is introducing the method of calculating a power losses in hard switching IGBT with free-wheeling diode by sine load current. This principle is given possibilities to calculate losses by datasheet.

Modeling of dual Z-source inverter for aircraft power generation

This paper presents dual Z-source inverter, which can improve quality of output voltage. The paper also presents the simulation results of dual Z-source inverter for aircraft power generation.

Mathematical simulation technique for power systems based on diode-clamped multilevel VSC

This paper presents a method for mathematical simulation of different power conversion systems based on diode-clamped multilevel power converters. The method is being a powerful tool for mathematical analysis of any system as far as it allows easy calculation of any power parameters of the system such as THD, WTHD, power factor; efficiency etc. under different operation conditions and control strategies. The base of the introduced mathematical analysis is the switching functions. As an example, three-level voltage source converter with space vector PWM is considered.

Voltage stabilization in permanent-magnet synchronous generator with variable rotation frequency

The paper proposes the analysis of three design and control scenarios for the system intendeded to generate the variable-frequency and constant-voltage electric energy on the basis of a synchronous generator and a paralleled semiconductor converter. The research scientists demonstrate the stabilization of the synchronous generator voltage, evaluation of basic electrical parameters, and the relationship between them and operation modes of the system.

Generation system of electric energy of “variable speed - variable frequency - constant amplitude” type

In this paper the generation system of electric energy is considered for aircrafts based on the principle of modification of an equivalent magnet gap in the synchronous generator with constant magnets (PMSM) by means of magnification of a consumed reactive current by a voltage inverter (AF). The basic energetic characteristics of such system have been obtained. Mathematical expressions, set of curves of voltage, PMSM currents, AF and other active components of system are presented. The results of mathematical simulation of the considered system in the SIMULINK environment of the MATLAB package are given.

Symmetrical current components regulator

A calculation method for symmetrical components and zero sequence is considered. Zero sequence is calculated by means of digital phase-rotatory filter based on Gilbert transform. The regulator control algorithm of symmetrical current components is proposed. The results of circuit simulation in different setpoints for symmetrical components were obtained.

Mechatronic system “synchronous generator-three-phase bridge rectifier” for self-contained power facilities

The processes in the system composed of a continuous magnet synchronous generator and a three-phase bridge back emf rectifier are under analysis in this article. Such systems are usable in self-contained facilities to charge accumulation cells in mines and open pits. The authors determine possible regimes of the systems under varying rate speeds of synchronous generator shaft and altered commutation delay angles of the controlled rectifier, derive analytical expressions for determining parameters of the analyzed system, and find generated power limit.

Mathematical model of the starter system based on a three-stage synchronous generator with damping cage

This paper, considers a mathematical model the starter system for gas turbine engines. Model of the investigated three-stage synchronous generator has been built in the dq-coordinates. The obtained model allows one to configure the machine parameters in a wide range, as well as receive information about currents and voltages major electrical components of the machine. Mathematical modeling shown efficiency of the resulting model and adequacy of the proposed algorithms electric starter mode synchronous machine.

Electric starter mode three-stage synchronous generator with damping cage

The article describes a method to start the three-stage motor with damping winding. This method is described for use in the auxiliary power unit (APU). The investigation consists of a main synchronous generator with damping winding exciter - synchronous generator with excitation winding and subexciter representing a three-phase permanent-magnet synchronous generator, designed to provide self-excitation regime.

AC-AC converter without passive elements in DC-link

This paper considers scheme of the AC - AC converter and briefly describes its power management features. Simulation results are presented in order to prove the effectiveness of the proposed system.