On the basis of the laboratory Ship Energy Saving Electrical Power Complexes, research work is carried out on the study of combined electromechanical propulsion complexes with various electric machines; the theory of the control system of the diesel shaft generator in the modes of power generation and electric drive was developed; analyzed the operation of asynchronous motors when they are supplied with electric power with a non-sinusoidal voltage; studied the systems for utilizing the heat of exhaust gases of diesel engines.
Using the laboratory equipment, KSMA scientists have developed a number of new technologies and technical solutions protected by patents of Ukraine:
• a method of obtaining a three-phase sinusoidal voltage from a direct current source. It is that the output direct voltage turns by the inverter into a rectangular variable. Its third harmonic is neutralized by a system of windings included in a three-beam star. It is distinguished by the fact that the fifth harmonic is additionally neutralized by the windings included into a five-pointed star. The seventh – by windings included in a regular heptagon, short-circuited.
• a device for obtaining a three-phase sinusoidal voltage, containing a constant voltage source. An inverter, which differs in that it additionally contains a transformer. Its input is five-phase and is connected to the output of the inverter, which is also five-phase. The output of the transformer is three-phase and is the output of the device. Inside the transformer there is an additional seven-phase winding connected in a regular heptagon and short-circuited.
