Fig 1.
Schematic diagram of Fuzzy PI controller.
Fig 2.
Schematic diagram of variable domain principle.
Fig 3.
Flowchart of the proposed improved GOA.
Fig 4.
Schematic diagram of improved GOA-based Fuzzy PI controller.
Fig 5.
Schematic diagram of PMSM control system.
Fig 6.
The comparison chart of algorithm fitness values.
Table 1.
Operation parameters of PMSM.
Fig 7.
The motor speed curves of load increase/decrease (A) the load of 10 N • m (B) the load of 20 N • m.
Fig 8.
The motor torque curves of load increase/decrease (A) the load of 10 N • m (B) the load of 20 N • m.
Fig 9.
The d-q axis current curves (A) the load of 10 N • m (B) the load of 20 N • m.
Fig 10.
The speed curves of motor speed adjustments.
Fig 11.
The d-q axis current curves of motor speed adjustments when the motor is loaded with torque.
Fig 12.
The torque curves of motor speed adjustments.
Fig 13.
The speed curves of forward and reverse rotation.
Fig 14.
Experiment platform of PMSM control system.
Fig 15.
The speed curve of load variations by use of scheme 1.
Fig 16.
The speed curve of load variations by use of scheme 2.
Fig 17.
The speed curve of load variations by use of scheme 3.
Fig 18.
The d-q axis current by use of scheme 1.
Fig 19.
The d-q axis current by use of scheme 2.
Fig 20.
The d-q axis current by use of scheme 3.
Fig 21.
The speed curve of acceleration and deceleration experiment by use of scheme 1.
Fig 22.
The speed curve of acceleration and deceleration experiment by use of scheme 2.
Fig 23.
The speed curve of acceleration and deceleration experiment by use of scheme 3.
Fig 24.
The d-q axis current by use of scheme 1.
Fig 25.
The d-q axis current by use of scheme 2.
Fig 26.
The d-q axis current by use of scheme 3.
Fig 27.
The speed curves of forward and reverse experiment by use of scheme 1.
Fig 28.
The speed curves of forward and reverse experiment by use of scheme 2.
Fig 29.
The speed curves of forward and reverse experiment by use of scheme 3.
Fig 30.
The d-q axis current curves of forward and reverse experiment by use of scheme 1.
Fig 31.
The d-q axis current curves of forward and reverse experiment by use of scheme 2.
Fig 32.
The d-q axis current curves of forward and reverse experiment by use of scheme 3.