Fig 1.
Topological structure of asymmetric six-phase PMSM drive system.
Fig 2.
Asymmetric six-phase PMSM winding space structure diagram.
Fig 3.
Double-Y phase shift 30° six-phase PMSM model for DPC-FTC in the case of one phase open circuit.
Fig 4.
Equivalent model of current predictive fault-tolerant control algorithm before and after parameter perturbation.
Fig 5.
Relationship between the system poles, β, and L0 / L.
Fig 6.
Deadbeat current predictive fault-tolerant control system model in the case of one phase open circuit.
Fig 7.
Phase current waveform when L0 = L.
(a) Phase current of the traditional model; (b) Improved model phase current.
Fig 8.
Current iq waveform at L0 = L.
(a) Traditional model current iq; (b) Improved model current iq.
Fig 9.
Current id waveform at L0 = L.
(a) Traditional model current id; (b) Improved model current id.
Fig 10.
Current iq waveform at L0 = 2L.
(a) Traditional model current iq; (b) Improved model current iq.
Fig 11.
Current id waveform at L0 = 2L.
(a) Traditional model current id; (b) Improved model current id.
Fig 12.
Stator current spectrum analysis at L0 = 2L.
(a) Traditional model; (b) Improved model.
Fig 13.
(a) Traditional model; (b) Improved model.
Fig 14.
Current iq waveform at L0 = 4L.
(a) Traditional model current iq; (b) Improved model current iq.
Fig 15.
Current id waveform at L0 = 4L.
(a) Traditional model current id; (b) Improved model current id.
Fig 16.
Stator current spectrum analysis at L0 = 4L.
(a) Traditional model; (b) Improved model.
Fig 17.
(a) Traditional model; (b) Improved model.
Fig 18.
Experimental platform.
Table 1.
Motor parameters.
Fig 19.
Equivalent inductance variation fitting of PMSM.
Fig 20.
Comparison between the waveforms of the variable torque current and speed, when the inductance parameters of the traditional and improved models are consistent.
(a) Traditional model current id/q; (b) Improved model current id/q; (c) Traditional model speed n; (d) Improved model speed n.
Fig 21.
Comparison between the waveforms of the variable torque current and speed, when a two times inductance mismatch exists between the traditional and improved models.
(a) Traditional model current id/q; (b) Improved model current id/q; (c) Traditional model speed n; (d) Improved model speed n.
Fig 22.
Comparison between the waveforms of the variable speed current and speed when the inductance parameters of the traditional and improved models are consistent.
(a) Traditional model current id/q; (b) Improved model current id/q; (c) Traditional model speed n; (d) Improved model speed n.
Fig 23.
Comparison between the waveforms of the variable speed current and speed of the traditional and improved models when the inductance mismatch is two times.
(a) Traditional model current id/q; (b) Improved model current id/q; (c) Traditional model speed n; (d) Improved model speed n.
Table 2.
Comparison of the two algorithms for the d-axis current static error when the inductor parameters are mismatched.