The Vector Control Strategies of 12-Phase Cycloconverter-fed Synchronous Motor System

Polyphase synchronous motors used as propelling motor in ships have a broad application foreground. It is necessary to research polyphase motor variable speed system. In this paper, the vector control strategies of 12-phase cycloconverter-fed synchronous motor are presented based on the analysis of 12-phase cycloconverter-fed synchronous motor with air gap-flux-oriented control. Further, the mathematical models of 12-phase synchronous motor in rotor d-q coordinate and in air gap-flux M-T coordinate are obtained. The simulation and experiment of the 12-phase cycloconverter synchronous motor system is carried out to verify the feasibility and validity of these strategies