Research on Vector Control and PWM Technique of Five-Phase PMSM - Intelligent Computing for Sustainable Energy and Environment - page 273

Fig. 9. Step response of Te when K q 3 =0 Fig. 10. Step response of Te when

K q 3 =0

The electromagnetic torque when K q 3 isnt zero is larger than the one when
K q 3 is zero. The comparison of Fig.9 and Fig.10 proves previous conclusion about
the torque increase due to the three harmonic current injection.

6Con lu on

The five-phase permanent magnet synchronous motors could be used with a
wide range of applications in the low voltage and high power fields. In this
paper,
(1) The vector space decoupling is applied respectively to establish math-
ematical model of the five-phase PMSM. Associated physical quantities are
converted to the fundamental α 1- β 1 subspace and three harmonic α 3- β 3 sub-
space. And the three harmonic current injection can increase the electromagnetic
torque.
(2) The control method of the near two largest vectors is used, then the voltage
of the α 1- β 1 subspace and the α 3- β 3 subspace can also be converted at the same
time.
(3) Experimental results are consistent with the theoretical analysis and verify
the effectiveness of the algorithm.

References

1. Sign, G.K.: Multi-Phase Induction Machine Drive Research-A Survey. Electric
Power Systems Research 147, 61-147 (2002)
2. Leila, P.: On Advantages of Multi-Phase Machines. In: 31st Annual Conference of
IEEE Industrial Electronics Society, Raleigh, USA, pp. 1574-1579 (2005)
3. Leila, P., Hamid, A.: Five-phase permanent-magnet motor drives. IEEE Transac-
tions on Industry Applications 41, 30-37 (2005)
4. Toliyat, H.A.: Analysis and simulation of five-phase variable-speed induction motor
drives under asymmetrical connections. IEEE Transactions on Power Electronics 13,
748-756 (1998)
5. Levi, E.: Multiphase Electric Machines for Variable-Speed Applications. IEEE
Transactions on Industrial Electronics 55, 1893-1909 (2008)