Abstract
Based on the analysis and mathematical models of synchronous electric machines (motor/generator), basing on permanent magnets, presented in this paper, the main importance of alternator AC power sources in the form of starter/generator (for conventional aircraft) and in the form of integrated unit starter (motor)/AC synchronous generator S/G AC (with respect to advanced aircraft concept in terms of more electric aircraft) was highlighted. Additionally, through the analysis and selected simulations of the on-board autonomous power supply system of the modern aircrafts, sources of electrical energy (synchronous motor/generator, integrated unit starter/AC generator) were located in board autonomic power system ASE (EPS, PES). Main components of this system are the electro-energetic power system EPS and the energo-electronic power system PES. In addition, the analysis and exemplary simulations of main electricity sources based on mathematical models have contributed to highlighting the main practical applications in accordance with the concept of MEA.
Highlights
In modern aircrafts of the main airline companies, both civil aviation (Airbus, Boeing, etc.) and military (Lockheed Martin), can be seen continuous development in terms of electrical machines [1], [2], which occurs due to dynamic technological progress of analogous fields of science, especially the innovative power electronics systems PES, equipment and advanced materials, and what goes with it – the new integrated avionics [3]
In view of the above, the on-board power supply of a modern aircraft in line with the new trend of the "More Electric Aircraft" concept may be based on a PMSM synchronous generator or an integrated unit starter AS/G variable frequency (VF) (Alternating/Starter Variable Frequency Generator) [4], [5]
Later the paper discusses and presents mathematical models of synchronous PMSM electric machines on the example of a synchronous motor for both serial and parallel connections in the field of EPS power supply, which is the main ASE power supply system implemented on modern aircraft
Summary
In modern aircrafts of the main airline companies, both civil aviation (Airbus, Boeing, etc.) and military (Lockheed Martin), can be seen continuous development in terms of electrical machines [1], [2], which occurs due to dynamic technological progress of analogous fields of science, especially the innovative power electronics systems PES, equipment and advanced materials, and what goes with it – the new integrated avionics [3]. Analysis and creating a mathematical model in the electro-energetic power system of a more electric aircraft was performed using an electric machine (motor/generator) based on permanent magnets PMSM. Proceeding with the mathematical description (model) of physical phenomena occurring in the electrical machine PMSM, responsible for the generation and transmission of electricity needed to power the main board equipment (aerial flight instruments, aircraft electrical equipment), implemented on a modern airplane, at the beginning you should consider the above issues with regard to the interaction of the magnetic field formed between the stator and the rotor of the electrical machine. Further mathematical considerations assume that all four coils have the same inductance In this situation, the equation describing the dynamic phenomena occurring in the synchronous motor will take the form. For each coil alternating current is defined in the same manner as in the previous considerations and taking into account Kirchhoff's second law to the closed circuit and taking the positive direction of the eyelet perimeter in layout of the analyzed substitute circuit arrangement according clockwise, the differential equation was defined [11], [12]
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