Electromagnetic processes in a direct frequency converter with natural switching as part of the starter-generator system of an aircraft

The article presents the starter-generator system of an aircraft based on the cycloconverter with natural commutation. A feature of the system is the use of the cycloconverter with natural commutation as the main converter of electrical energy as part of the starter-generator system. At the same time, the cycloconverter allows the starter-generator system to operate both in the mode of generating electric energy and in the mode of electric starter start of an auxiliary power plant or main engine with the help of a synchronous generator. An algorithm for analyzing electromagnetic processes in the cycloconverter with natural commutation as part of a starter-generator system is proposed and considered in detail as an example for a single-phase converter output. The switching functions of the converter valves are determined by the spectral calculation method, an expression for the load current is found and its spectral composition is determined. The article presents the result of computer modeling of the system under study, which allows us to confirm the validity of the proposed method of analyzing the electromagnetic processes of the system.

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