Flux Saturation Model Identification for SynRMs With Deadtime Effect Compensation and More Appropriate Injection Voltage Selecting

This article aims to provide a more detailed analysis and optimization of the implementation process of a recently proposed magnetic saturation model identification method for synchronous reluctance motors. This model identification method uses injection voltages and ensures that the motor rotor remains stationary without locking during the experimental process. The data are processed using the least-squares method. The magnetic saturation model includes both self-saturation and cross-saturation parts, which conform to the actual motor modeling requirements. It seems that most model identification tests that use injection voltage ignore the impact of deadtime effects. This can lead to incorrect magnetic flux calculation, so a compensation method is proposed in this article. Furthermore, due to the need to ensure that the injection voltage direction is correct, keeping the rotor standstill during the testing process is necessary. It is difficult to select the injected voltage value during the cross-saturation model parameters identification testing process, and there is no absolutely correct configuration method for setup the values. This article will analyze this and propose more reasonable limiting conditions. Finally, a 5-kW synchronous reluctance motor is identified through simulation and practical operation, and the magnetic saturation model of the motor is obtained.