Fig. 1. Schematic diagram of magnetic suspended rotor structure

Fig. 2. Schematic diagram of sensor runout

Fig. 3. Schematic diagram of the AMB control system

Fig. 4. Block diagram of the SOGI-FLL

Fig. 5. Block diagram of the double SOGI-FLL

Fig. 6. Block diagram of the PDSOGI-FLL

Fig. 7. Schematic diagram of harmonic current suppression

Fig. 8. Equivalent schematic diagram of X-channel harmonic current suppression

Fig. 9. Comparison of phase-frequency diagram before and after phase compensation

Fig. 10. Experiment platform of magnetic suspended motor

Fig. 11. Simulation results of speed estimation with different convergence factors kω

Fig. 12. Results of speed estimation during the speed-up process

Fig. 13. Simulation results of AX channel control current FFT at 200 Hz

Fig. 14. Experimental results of AX channel control current FFT at 200 Hz