Abstract

In this study, we design a novel Integrated Motor Propulsor (IMP) which worked underwater for propelling. The motor in this IMP was PM motor employing Halbach array and solid rotor; and a field-circuit-motion coupled time-stepping Finite Element Analysis (FEA) model is presented for analyzing this kind of solid-rotor motor and the problem that the parameters of rotor are hard to calculate is solved. The rotor resistance variation with speed difference is considered and the finite element analysis involving external circuit and electromagnetic field was provided. A moving air-gap boundary method combining motor motion equation was adopted to simulate the transient process of motor. The performance of the prototype of IMP is analyzed using the proposed model and the calculation results of back EMF and starting torque are tally well with those from tests, which indicates that the proposed method in this study is effective and exact and that it can be used to analyze other kind of solid-rotor motor.

Keywords:

Field-circuit coupled, IMP, moving air-gap boundary, solid rotor, time-stepping finite element,

References

Competing interests

The authors have no competing interests.

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Copyright

The authors have no competing interests.