A Multilevel Converter With a Floating Bridge for Open-End Winding Motor Drive Applications

作者：Chowdhury Shajjad^*; Wheeler Patrick W; Patel Chintan; Gerada Chris

来源：IEEE Transactions on Industrial Electronics, 2016, 63(9): 5366-5375.

DOI：10.1109/TIE.2016.2561265

• Field-oriented control (FOC)
• floating bridge
• open-end winding induction machine
• space vector

This paper presents a three-phase open-end winding induction motor drive. The drive consists of a three-phase induction machine with open stator phase windings and dual-bridge inverter supplied from a single dc voltage source. To achieve multilevel output voltage waveforms, a floating capacitor bank is used for the second of the dual bridges. The capacitor voltage is regulated using redundant switching states at half of the main dc-link voltage. This particular voltage ratio (2:1) is used to create a multilevel output voltage waveform with three levels. A modified modulation scheme is used to improve the waveform quality of this dual inverter. This paper also compares the losses in the dual-inverter system in contrast with a single-sided three-level neutral point clamped converter. Finally, detailed simulation and experimental results are presented for the motor drive operating as an open-loop v/f controlled motor drive and as a closed-loop field-oriented motor controller.

• 出版日期2016-9