MTPA real-time tracking method based on AC signal injection

In the actual control of Interior Permanent Magnet Synchronous Motor (IPMSM), the electrical parameters often fluctuate due to magnetic saturation and temperature change and therefore it is impossible to achieve an accurate control. Aiming at parameter changes, a new real-time tracking method for Maximum Torque Per Ampere (MTPA) trajectory of permanent magnet synchronous motor is proposed. The angle information corresponding to the MTPA current is extracted by introducing a new MTPA reference frame, infusing it with appropriate high-frequency AC signal components, analysing the internal relationship between the electromagnetic torque pulsation component and the current vector angle under the new MTPA reference frame, and then configuring reasonable cut-off frequencies of low-pass and band-pass filters. At the same time, compared with the traditional injection method, it is not necessary to inject high-frequency current angle into the vector angle and when the system is stable, it can be injected intermittently to reduce losses. Thus, accurate and efficient control can be achieved without parameter identification. The simulation results verify the feasibility and effectiveness of the proposed control algorithm.


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  • Accession Number: 01894475
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Sep 25 2023 2:46PM