Analysis of Integrated Winding Configuration in Dual-Electrical-Port Machine
2021
A novel winding configuration named “integrated winding” was proposed to realize function of original two sets of windings, i.e. produces two independent-control magnetic fields with different pole-pairs (not slot-harmonics). The concrete realization method is through the coordinated operation of controllers, two current components with different phases are injected into the same coil to generate required magnetic fields according to star of slots. Because the magnetic field produced by the winding is only related to the instantaneous current in each coil, rather than specific connection of coils. The integrated winding not only simplifies the winding configuration, but also increases the electric loading, thus, improving torque density. The general method of integrated winding configuration and current injection rule are established. The split-phase rules of integrated winding are summarized and the feasibility of six-phase and twelve-phase integrated windings is then proved through finite element analysis (FEA). A prototype is fabricated and the experimental results verify the availability of the integrated winding.
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