Interrelated Control of the Multi–Motor Electrical Drive

The Multi-motor control systems have been increasingly used in many ways for mechanical and electrical drives. In particular, multi-motor drive implementation in high power ship propulsion systems is described in this article. The twin propelled motor which is used as the research subject consists of two mechanically coupled double star induction motors with separate power supply of each stator winding from certain frequency converter. The issues of both voltage synchronization in each pair of frequency converters working in parallel, and load alignment between induction motors are discussed in the article. The modeling results of the proposed interrelated control system are confirmed by the relevant experiments. Finally, the control system offered in this article allows providing sustainable operation of propulsion system in all working conditions.