An Instantaneous Power Balancing Technique for an Open-End IM Drive Using Carrier-Based Modulation for Vehicular Application

• Published in: IEEE transactions on industrial electronics (1982) Vol. 66; no. 12; pp. 9217 - 9225
• Main Authors: Menon, Rishi, Azeez, Najath Abdul, Kadam, Arvind H., Williamson, Sheldon S., Bacioiu, Ciprian
• Format: Journal Article
• Language: English
• Published: New York IEEE 01-12-2019; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Batteries; Carrier-based modulation; dual two-level inverter; electric vehicle (EV); Electric vehicles; Electrification; Inverters; modulation index; offset; open-ended machine; power balance; Power flow; Propulsion systems; Pulse duration modulation; Pulse width modulation; State of charge; state of charge (SOC); Switches; Topology
• ISSN: 0278-0046; 1557-9948
• DOI: 10.1109/TIE.2018.2886749

A multilevel drive can be realized by using an open-ended machine, fed from dual two-level inverters. The topology supplied from isolated dc sources is suitable for transportation electrification. In vehicular systems, it is essential that the isolated dc sources, comprising of battery packs, should discharge uniformly and maintain balanced dc voltage at the dc-link terminal. A simple carrier-based pulsewidth modulation (PWM) technique is presented in this paper, which can effectively regulate the power drawn between the two two-level inverters while maintaining the multilevel operation of the drive. The modulation technique can balance the instantaneous state of charge of independent battery packs and dynamically equalize the power flow from the two inverters, based on drive requirement. This will enhance the reliability of the propulsion system in electric vehicles. The operation of the proposed PWM technique has been validated through detailed simulation and experimental tests.