Vibration Characteristics of the Dual Electric Propulsion System of Vessels under Electromechanical Coupling Excitation

An electromechanical coupling driving system is a commonly used for large overloading ships. In this paper, dual input model, including an inverter power supply, three-phase induction motor, fixed-axis gear, and load, established. The influences of the gear error, inverter, stiffness on vibration characteristics are studied, each parameter analyzed. supply part considers constant voltage–frequency ratio control sinusoidal pulse width modulation, as well inverter. motor uses dynamic model based equivalent circuit. section translation–torsion with time-varying mesh damping. mechanical coupled load torque motor. results show that greater error system, rotation frequency main factor. Secondly, by comparing influence value accuracy difference vibration, we found when exists, dominant factor difference. Thirdly, use also increases system. Finally, lower elastic reduced