Fig. 1. Reference voltage vectors limited by the conventional overmodulation methods.
Fig. 2. Voltage modulation performance of the inverter for the conventional overmodulation methods.
Fig. 3. Block diagram of the proposed method.
Fig. 4. Reference voltage vector compensated by the proposed method.
Fig. 5. Reference voltage vector limited by the overmodulation technique without and with the proposed method.
Fig. 6. Voltage modulation performance of the inverter improved by the proposed method.
Fig. 7. Simulation results for the conventional method and the proposed method.
Fig. 8. Simulation results for the acceleration performances.
Fig. 10. Experiment results for the acceleration performances.
Fig. 9. Experiment results for the conventional method and the proposed method.
TABLE I PARAMETERS OF THE PMSM DRIVE SYSTEM
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