Modified predictive torque control for balancing three‑level NPC inverter‑fed PMSM drives

Samer Saleh Hakami; Kyo-Beum Lee

Modified predictive torque control for balancing three‑level NPC inverter‑fed PMSM drives

Samer Saleh Hakami

Kyo-Beum Lee

Vol. 24, No. 4, pp. 586-597, Apr. 2024

10.1007/s43236-023-00763-4

DC-link balancing

Permanent magnet synchronous motor

Predictive torque control

Space vector PWM

Three-level NPC inverter

Abstract

The conventional approach of predictive torque control (PTC) is frequently employed in the control of permanent magnet synchronous motors (PMSMs) driven by a two-level voltage source inverter (2L-VSI). This technique offers low complexity and reduced torque ripples in the low-speed region by minimizing the duty-cycle of the applied voltage vector (VV) compared to the complete utilization of the DC-link voltage. However, it has its limitations, including slow torque dynamics, restricted modulation index (MI), and an inability to select zero VV, which would be useful for minimizing ripples in multilevel VSI drives. Additionally, it can lead to an unbalanced DC link due to the restricted VV selection, especially at low MI. To address these limitations, a modified PTC based on space vector pulse-width modulation approach is proposed for three-level neutral-point-clamped (3L-NPC) VSI-fed PMSM. The proposed 3L-PTC method can reduce torque and flux ripples at low MI, improve dynamic response, and maintain a balanced DC link regardless of operating conditions. Intensive numerical and experimental evaluations are carried out to validate the effectiveness of the proposed 3L-PTC.

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Cite this article

[IEEE Style]

S. S. Hakami and K. Lee, "Modified predictive torque control for balancing three‑level NPC inverter‑fed PMSM drives," Journal of Power Electronics, vol. 24, no. 4, pp. 586-597, 2024. DOI: 10.1007/s43236-023-00763-4.

[ACM Style]

Samer Saleh Hakami and Kyo-Beum Lee. 2024. Modified predictive torque control for balancing three‑level NPC inverter‑fed PMSM drives. Journal of Power Electronics, 24, 4, (2024), 586-597. DOI: 10.1007/s43236-023-00763-4.