Full Speed Position Estimation Based on Disturbance Observer and HF Signal Injection for IPMSM Sensorless Control

Review of speed estimation algorithms for three- phase induction motor

“…There are two different types of speed estimation methods that are taken into account in induction motor's drives in the current literature: non-ideal phenomenon-based techniques and model-based techniques. Non-ideal, phenomena-based schemes can either be deployed through signal injection approaches or rotor slot harmonics (RSH) extraction [ 108 , 109 ]. The slots of rotor are particularly changed to obtain the necessary space harmonics in the case of speed estimation based on signal injection, and the saliency of the rotor position is identified by the algorithm of position estimation.…”

“…The slots of rotor are particularly changed to obtain the necessary space harmonics in the case of speed estimation based on signal injection, and the saliency of the rotor position is identified by the algorithm of position estimation. For this, a closed loop observer model in combination with appropriate processing was utilized to track the rotor saliencies using a component of high-frequency voltage as the carrier signal [ 49 , 56 , 66 , [108] , [109] , [110] ]. Even while operating at low or no speed, the signal injection is still present.…”

“…The schemes in this group are based on a measurement of the difference in the motor's impedance between its flux axis and q-axis and the injection of a signal onto the motor's estimated flux axis. Due to the skin effect, the difference is typically not detectable at fundamental frequencies but is not detectable at injected high frequencies [ 108 , 109 ]. By injecting signal, this kind of method uses rotor slot harmonic, saturated, and the leakage inductance to extract the rotor position information [56] .…”

“…There are two types of injection techniques: voltage and current [ 49 , 108 , 109 ]. As demonstrated in Fig.…”