Sensorless Control and Inductances Estimation of IPMSMs Using FPGA and High Bandwidth Current Measurement

This paper presents a sensorless control method and very fast on-line inductances identification of an IPMSM. The current slopes (derivatives) at one active-voltage vector zero-voltage are measured every PWM cycle to estimate the rotor speed position with aim increasing estimation accuracy reducing total harmonic distortion. In addition these slopes, DC bus voltage inverter is machine on-line. proposed parameter can overcome drawback existing off-line methods, such as: requirement robust mechanical clamping system test signal generators. also addresses limit as slow update possibility incorrect convergence estimated parameters. Extensive experimental studies were conducted verify effectiveness robustness parameters