Among the various methods for generating electricity on a ship, a shaft generator system is characterized by the
highest energy and economic efficiency. The use of a Permanent Magnet Synchronous Generator (PMSG) in
these systems, in comparison to classic synchronous generators, improves the ship’s propulsion efficiency and
the system’s reliability. The problem of adjusting the PMSG’s excitation and changing the speed of the generator’s
shaft can be solved by the use of modern power and electronic systems. This article presents a method
for controlling the mechatronic system of a shaft generator with a PMSG, which enables stable operation to be
achieved when changing the rotational speed of the shaft. Analytical and simulation studies were carried out
and have enabled the boundaries of the area in which the PMSG can operate to be determined, while maintaining
the required electrical power. The results have shown that the use of a PMSG instead of an EESG can
increase the energy efficiency of the shaft generator system and increases the system’s reliability.
