MECHANISM OF TORQUE PRODUCTION IN A COUPLED POLYPHASE RELUCTANCE MACHINE
Keywords:mmf, permeance, transposed auxiliary winding, flux distribution, flux density
This paper studies the nature and mechanism of torque production in a coupled polyphase reluctance machine with two identical stator windings. For a graphical illustration of the torque mechanism, the permeance function approach is adopted in preference to the d – q axis analysis. The resultant mmf distributions on both halves of the machine are derived for asynchronous operation and found to be exerting an electromagnetic torque on their leading rotor pole axes in the anti-clockwise direction for the motoring mode and on the trailing pole axes for generator operation. It is shown that the machine develops synchronous torque while operating in the asynchronous mode and the sharing of the load torque between the coupled machine units is examined.
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