Accurate separation of electromagnetic torque for axial field hybrid permanent magnet memory motor
To solve the problems of the traditional memory motor,such as low torque density and space con-flict between armature winding and excitation winding,combined with the axial field permanent magnet mo-tor,a novel axial field hybrid permanent magnet memory(AFHPMM)motor is proposed.The motor excited by both NdFeB and AlNiCo utilizes the stator separation structure to achieve wide speed range and high torque density.In order to analyze the contribution of different permanent magnets(PMs)to the output torque of the novel motor and solve the problem that the traditional frozen permeability method(FPM)cannot accurately separate the electromagnetic torque,a new FPM is proposed and the separation results of the two methods are compared and analyzed.The results show that the separation accuracy of the new torque separation method is always higher than that of the traditional torque separation method under different magnetization states,and the relative error between the new method and the finite element calculation is always less than 5％.The relative error between the new torque separation method and the finite element calculation results is only 0.94％in the forward fully magnetized state.It is proved that the proposed torque separation method can achieve the precise separation of electromagnetic torque in the novel memory motor.
万方数据
维普
