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Pérez-Hidalgo, Francisco Manuel Heredia-Larrubia, Juan Ramón Ruiz-González, Antonio Francisco Meco-Gutiérrez, Mario Jesús 2025-12-11T08:23:33Z 2025-12-11T08:23:33Z 2025-08-08 Perez-Hidalgo, F. M., Heredia-Larrubia, J. R., Ruiz-Gonzalez, A., & Meco-Gutierrez, M. (2025). Thermal Behavior Improvement in Induction Motors Using a Pulse-Width Phase Shift Triangle Modulation Technique in Multilevel H-Bridge Inverters. Machines, 13(8), 703. https://hdl.handle.net/10630/41051 10.3390/machines13080703 his study investigates the thermal performance of induction motors powered by multilevel H-bridge inverters using a novel pulse-width phase shift triangle modulation (PSTM-PWM) technique. Conventional PWM methods introduce significant harmonic distortion, increasing copper and iron losses and causing overheating and reduced motor lifespan. Through experimental testing and comparison with standard PWM techniques (LS-PWM and PS-PWM), the proposed PSTM-PWM reduces harmonic distortion by up to 64% compared to the worst one and internal motor losses by up to 5.5%. A first-order thermal model is used to predict motor temperature, validated with direct thermocouple measurements and infrared thermography. The results also indicate that the PSTM-PWM technique improves thermal performance, particularly at a triangular waveform peak value of 3.5 V, reducing temperature by around 6% and offering a practical and simple solution for industrial motor drive applications. The modulation order was set to M = 7 to reduce both the losses in the power inverter and to prevent the generation of very high voltage pulses (high dV/dt), which can deteriorate the insulation of the induction motor windings over time. eng http://creativecommons.org/licenses/by-nc-sa/4.0/ open access Atribución-NoComercial-CompartirIgual 4.0 Internacional Calentamiento por inducción Convertidores eléctricos Ingeniería eléctrica Thermal Behavior Improvement in Induction Motors Using a Pulse-Width Phase Shift Triangle Modulation Technique in Multilevel H-Bridge Inverters. journal article