Maksim A. Zharkov

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.

Experiment results of the laboratory tests of electrical starting system powered by an AC source

Realization of multi-usage of on-board devices is one of the criteria for the effective usage of aircraft on-board equipment. As part of this criterion, it seems appropriate to integrate the starter and generator of the auxiliary power unit in a single unit [7]. The article presents the laboratory test results of the electric engine starting system prototype. An electric starter mode has been realized on the base of three-stage synchronous generator. The purpose of the test is to debug control algorithms and to test the prototype operability while feeding three-stage synchronous generator.

Electric starter mode of synchronous generator with permanent magnets

The paper considers a method to start the motor with permanent magnets, the definition initial the position of the rotor and the use of Observing System for speed. Feature of the system is the lack of sensors of the rotor position and speed. The article provides a description of the method for determining the initial position of the rotor converter control system, the results of mathematical modeling of this system.

Primary AC power supply system for autonomous objects

This paper considers scheme of primary AC power supply system for autonomous objects. As well this paper presents the characteristic features of power supply system, its structural model and the simulation results are given.

Applying the estimation system for synchronization of thyristor rectifier operating from the permanent magnet synchronous machine

The use of adaptive estimator based on the flux linkage algorithm gives an opportunity to eliminate the speed sensor and rotor position sensor and to reduce the mass and dimensions parameters of the drive. Estimator provides the actual values of back electromotive force of the synchronous machine and that makes it possible to apply permanent magnet synchronous machine efficiently. The article presents the results of modelling of the permanent magnet synchronous machine operating on the controlled rectifier. The purposes are debugging of estimator algorithm, the comparison with the operating mode without estimator, as well as verification of the algorithm with the dynamic changes during generator operation.

Evaluation of efficiency of the electronic transformer's circuits with an intermediate DC link

In this paper the structure and principle work of electronic transformer scheme with intermediate elements of DC were discussed. Through simulation modeling time diagrams of this scheme were obtained. Assessment of the harmonic distortion input current and output voltage was held. Approximate calculation of the efficiency of the electronic transformer was carrying out.

The conversion algorithm of voltage source inverter control signals for operating current source inverter

This paper considers one of the methods for controlling the current source inverter, which uses previously generated control signals for the voltage source inverter. Describes the instructional method for converting these signals with minimization of switching losses. Analysis results are verified with simulation modeling of control systems in the software PowerSIM, as well as experimental investigations of microprocessor control system based on field-programmable gate array.

Synthesis of circuit of regulation of current for buck DC-DC converter. Methodical aspect

In this article the direct method of synthesis of regulators is offered on the example of the current loop, as internal loop of the double-loop subordinate control system for a buck dc-dc converter.

An electric energy generation system for an on-board network

This paper describes a system consisting of a magnetoelectric voltage generator and AC-AC converter without reactive energy storage components in the DC link. AC-AC converter consists of a 12-pulse rectifier circuit and a current source inverter. A special feature of the converter is the usage of the inductance of the synchronous generator stator windings as input smoothing reactor of a current source inverter. The article describes the converter control system, main energy dependence of the system and results of mathematical modeling of the system.