Development of a control system for a small-sized gas turbine engine

Аuthors

Samotya A. A.^*, Eliseeva A. Y.

JSC "ODK-STAR", Perm, Russian Federation

*e-mail: samotyasasha@mail.ru

Abstract

The article is devoted to the development of a fuel supply control system for a small-sized gas turbine engine (MGTD). Of particular difficulty when feeding fuel to the combustion chamber are the processes of starting and switching the engine to various operating modes, such as starting and power control, taking into account the effects of external factors. The article presents a mathematical description of the electric motor of a fuel pump, two methods of controlling an autonomous voltage inverter are considered: vector-spatial pulse width modulation (VSM) and 6-step switching of transistors. To solve the problem of dosing a small amount of fuel, the VSM was chosen, which ensures the operation of the electric motor at low speeds without the use of speed and position sensors. The study considers sensor-free methods for estimating the speed and angle of rotation of the rotor of an electric fuel pump drive using a rotating coordinate system along the d, q axes and a 6-stage switching with speed determination by measuring the frequency of counter-EMF in the free phase of the electric drive. engine. A sensorless vector control system for a permanent magnet synchronous motor using spatial vector pulse width modulation is described. When implementing the speed observer, it is proposed to use internal control system signals that depend on the orientation error to launch the MGTD at low speeds without using speed and rotor position sensors. The results of the work of the developed fuel supply control system for a small-sized gas turbine engine, reflecting high efficiency and adaptability, are presented. Experiments have been conducted confirming that the proposed system is capable of significantly improving the efficiency of MGTD due to the absence of fuel bypass and optimization of the operation of the electric motor of the fuel pump.

Keywords:

small-size gas turbine engine, automatic control system, MGTD control circuits, software, permanent magnet synchronous motor, electric drive, vector control system, sensor-free control

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