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Technical Lecture

AC, DC, BLDC Motor Drives

T16.8 - Implementation and Analysis of Direct Torque Control on High-Speed PMSMs: A Comparative Study of Commercial and Laboratory-Developed Motors

Wednesday, March 19, 2025
11:20 AM – 11:40 AM ET
Location: Level Three, A314
This digest presents a comprehensive analysis of Direct Torque Control (DTC) algorithm applied to ultra-high-speed Permanent Magnet Synchronous Motors (PMSMs) for the application up to 500,000 RPM. The study evaluates the performance of DTC on both a commercially available 500,000 RPM Celeroton CM-2-500 motor and a laboratory-developed 500k RPM PMSM. Simulations and experimental validations are conducted, focusing on critical performance challenges such as control delay, torque ripple, and harmonic distortion. Experimental testing was carried out at speeds of up to 110,000 RPM for the Celeroton motor and 25,000 RPM for the custom-designed laboratory motor. DTC performance was evaluated in terms of torque ripple, control delay, and harmonic distortion, revealing that control delay significantly affects stability at high speeds, increasing phase lag and torque ripple. Future work will include further high-speed testing. The full paper will detail delay compensation, low SFR effects, and torque ripple mitigation strategies to improve DTC precision and robustness in ultra-high-speed applications.