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www.technologyfuturae.com New Sensorless Field-Oriented Control for Six Phase Induction Machines By Sathish Kumar.K.S Edited By Sarath S Nair www.technologyfuturae.com

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Introduction SPIM –Six phase Induction machine Sensorless vector control technique Reference Model Model of SPIM

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www.technologyfuturae.com SPIM Two three phase stator windings spatially shifted by 30 electrical degrees.

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www.technologyfuturae.com control technique Does not required flux and speed estimators It uses only different b/w stator current of the mathematical model and motor,then forces them to decay to zero Simpler and does not need high computation time

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www.technologyfuturae.com Model of SPIM The SPIM is a double-six-dimension system(six stator and six rotor) Decomposed into three double-two- dimension orthogonal subspaces, (α,β),(z1,z2),(o1,o2)

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www.technologyfuturae.com Contd.. y= electrical angle b/w the two three phase stator winding

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www.technologyfuturae.com Machine Model in (α,β)

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www.technologyfuturae.com Machine Model in (z1,z2),(o1,o2)

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www.technologyfuturae.com Indirect Vector Control of SPIM

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www.technologyfuturae.com Contd.. The mechanical equation is the following in which J is inertia coefficient,and

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www.technologyfuturae.com Induction motor and model

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www.technologyfuturae.com Block diagram of overall system

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www.technologyfuturae.com Conclusion A new sensorless vector control for six phase induction machines, without flux and speed estimations was studied.

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www.technologyfuturae.com References 1.IT.A.Lipo, A d-q model for six phase induction drives,proc.Int. Conf.Electrical Machines,vol.2,1980. 2.Y.Zhao & T.A.Lipo Space Vector PWM control of six-phase Induction machine using space vector Decomposition,IEEE Trans.industrial Application, vol 31,No.5.1100- 1109,sept/Oct 1995. 3.J.Holtz, Sensorless Control of Induction motor Drives,Proc.of the IEEE, vol.90,no. 8,Aug.2002.

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Log On to www.technologyfuturae.com Technical Presentations, Research Reviews, New designs & Developments

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www.technologyfuturae.com Thank you.

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