| The underwater vehicle,as a high-tech equipment of marine exploration,has promoted its importance.As crucial part of underwater vehicle,the propulsion motor affects the performance of underwater vehicle directly.Permanent Magnet Synchronous Motor(PMSM)could satisfy the requirement and consistent with development trends of underwater vehicle propulsion motor due to its advantages,such as high efficiency high efficiency,high power density,high output capacity,wide adjustable-speed and operating smoothly,compact size.The main work has been carried out as follows:Firstly,the basic structures and the analysis methods of PMSM are studied,moreover the mathematical model of PMSM is established,laying a theoretical foundation for the motor designing.Secondly,the operating environment and the performance requirements of underwater vehicle propulsion system are researched.The field-circuit algorithm is applied to acquire the principal dimensions of PMSM and initial scheme.ANSYS-RMxprt calculates and checks the scheme efficiently.What’s more Taguchi method is adopted to acquire higher efficiency,less dosage of magnet and the minimum torque ripple.The final scheme is conformed according to the result of optimization.Finally,the finite element model of the motor is developed with the help of electromagnetic finite element analysis software ANSYS-Maxwell.The magnetic field distribution,cogging torque,no-load electromotive force and the speed,output torque,flux linkage in start operating condition are studied.The FEA results of the permanent magnet synchronous motor(PMSM),which has a rated power of 2.2kW,verify the validity and effectiveness of the method and it well meets the requirement. |
