Rodin M. The control of semiconductor frequency converter of asynchronous electric drive while transfering to supply and back

Asynchronous electric drive frequency converter control with the transfer of asynchronous motor to supply and back. The determination of properties and characteristics of a semiconductor converter with a transfer of asynchronous motor to supply and back, the development of structures and ways of system "converter - motor" on this base. Semiconductor converter theory, electric drive theory, electric motor theory, rotating vector theory, the method of decomposition on a phase and a frequency, operator transient calculation method, equal resistance method. Frequency converter control system structures for regulation and transfer modes were developed; control system noise immunity was increased by the usage of a rotor and supply fluxes as reference signals; linear, integral, parametric, instrumental, subharmonic, pulsational noises and the noise relating to spread in the operation of the contactors were classified; the influence of phase, frequency, magnitude discrepancies on the transition values of electromagnetic moment and stator current was determined; rotor and stator components were extracted in transfer transients by the usage of the mathematical models of asynchronous motor; control system regulators were synthesized by the usage of mathematical models of the power part of system "converter - motor". The synchronization parameter set of a frequency converter with an asynchronous motor and the suitable range of their values were determined; the kinds of noises in the control system were classified; the usage of rotor and supply fluxes as reference signals was suggested; the mathematical models of asynchronous motor and the power part of the system "converter - motor" in basis "current - flux" were developed; the control system structure and the technique of its element synthesis were offered. In state enterprise "NII "HEMZ", in the educational process of industrial and biomedical electronics chair of National technical university "Kharkov polytechnical institute". Electronics.