TORQUE SEPARATION FOR DUAL THREE-PHASE PM MACHINES USING FROZEN PERMEABILITY METHOD

In order to separate the instantaneous torque components in dual three-phase (DTP) permanent magnet (PM) machines, an accurate model accounting for the mutual inductance between two winding sets is developed in this paper, together with the utilization of frozen permeability method. It is found that in addition to the PM and reluctance torque components produced by each winding set, the mutual inductance between two winding sets also contributes to the overall output torque, as a reluctance torque component. With the frozen permeability method, the instantaneous torque components can be separated appropriately, which can provide more insights for the design and control of DTP PM machines.