On the analysis and control of a split pole
External reviewer: Professor Alan G. Jack, University of Newcastle upon Tyne,
A conventional 8-pole induction machine has been rewound with four 2-pole windings, each
of them being connected to an independent converter. This brings a supplementary freedom
in a sensorless drive, avoiding estimation problems at low stator frequencies. This work
includes some modelling aspects of the modular design. It investigates the magnetic
behaviour of the machine when a torque separation strategy at low frequency is activated.
It then presents the control strategy as well as some experimental results. It finally
concludes on perspectives for this modular concept.