Impact of H-bridge inverters structure on the performances of open-end winding induction machine drives

Abstract

Introduction. The integration of machine-converter systems represents a foundational architecture in modern engineering, serving as a critical component in variable-speed industrial drives as well as in sophisticated transportation and energy infrastructure. Problem. Standard 2-level inverter-fed drives often struggle to meet stringent requirements for performance and reliability. Utilizing open-end stator winding configurations integrated with advanced power topologies provides a superior alternative for enhancing both operational flexibility and fault tolerance. Goal. To rigorously validate the combined structure of the open-stator winding induction machine and the H-bridge inverter, conclusively demonstrating its superiority over conventional systems in terms of dynamic performance, power quality, and power segmentation of drives system. Methodology. The mathematical model of the machine is developed and validated using the MATLAB/Simulink environment. To assess its dynamic performance, the system is analyzed under both healthy and degraded operating conditions, utilizing H-bridge inverter topologies for the power supply. Results. The superior performance of these variable speed drives is directly attributable to the H-bridge inverter topology utilized to supply the open-end winding induction machine. This configuration significantly enhances voltage quality and enables effective power segmentation, as demonstrated by the results comparing this architecture against conventional 2-level inverters. Furthermore, to ensure continuous service, this fault-tolerant configuration effectively mitigates the impact of failures, maximizing system availability through a seamless transition into degraded modes. Scientific novelty. The proposed innovation utilizes an H-bridge topology to deliver superior voltage quality, significantly reduced torque ripple, and lower total harmonic distortion (THD). This configuration enables effective power segmentation, allowing the system to operate with a substantially lower DC-link voltage than conventional inverters. Practical value. Integrating the machine with H-bridge inverter topologies demonstrates clear technical advantages, specifically enhanced power quality via lower THD and improved mechanical performance through reduced torque ripples. Compared to conventional inverters, this architecture proves ideal for high-power industrial drives, offering exceptional reliability, reduced maintenance requirements, and guaranteed service continuity in degraded mode. References 16, table 1, figures 12.