Extended Virtual Signal Injection Control for MTPA Operation of IPMSM Drives With Online Derivative Term Estimation

Accurate online MTPA control of IPMSM considering derivative terms

“…The derivative terms in Eq. ( 18) can be approximately calculated using the following formulas [19] (…”

“…Thus, offline methods require a relatively large memory space and cannot fully consider the influence of the variation in motor parameters. The online methods include the searching method [8][9][10] , the signal injection method [11][12][13][14][15][16][17][18] , and the model-based method [19][20][21] . In Ref.…”

“…In Ref. [19], an extended virtual signal injection method was proposed. This method estimated the derivative terms of the motor parameters to the current angle online to improve the accuracy of MTPA tracking.…”

Design of Constraints for Seeking Maximum Torque per Ampere Techniques in an Interior Permanent Magnet Synchronous Motor Control

“…In order to exclude these inconveniences, a group of techniques, which do not require motor parameters, have been proposed. These methods are called seeking algorithms, and they track minimum current consumption, which corresponds to the MTPA trajectory, using either injection of the additional signal [16][17][18][19][20][21][22][23][24][25][26][27][28][29] or perturbing the motor drive and analyzing response [30][31][32][33][34][35][36][37][38].…”

“…The main disadvantage of injection-based techniques is noise and vibration caused by signal injection, which significantly restricts the application area of these methods; therefore, recently, a virtual signal injection control (VSIC) [23][24][25][26][27][28][29] was proposed, which eliminates the abovementioned drawback. The methods of this group inject a high-frequency signal into the system mathematically, without real modification of the signals applied to the motor.…”