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Warianty tytułu:	A hybrid seven-level inverter using low voltage devices and operation with single DC-link
Autorzy:	Yadav Apurv Kumar, Gopakumar Kumarukattan Nair, Krishna Raj R., Umanand Loganathan, Bhattacharya Subhashish, Jarzyna Wojciech
Dyscypliny:
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Rok wydania:	2019
Wersja dokumentu:	Drukowana \| Elektroniczna
Język:	angielski
Numer czasopisma:	10
Wolumen/Tom:	34
Strony:	9844 - 9853
Impact Factor:	6,373
Web of Science® Times Cited:	56
Scopus® Cytowania:	77
Bazy:	Web of Science \| Scopus
Efekt badań statutowych	NIE
Materiał konferencyjny:	NIE
Publikacja OA:	NIE
Abstrakty:	angielski
	This paper proposes a new 7-level inverter topology for induction motor drives. It is a hybrid topology formed by cascading a 5-level ANPC with a 3-level T-type converter. It is obtained using low voltage semiconductor devices with voltage blocking capability of Vdc/3 and Vdc/6 . The topology uses three floating capacitors per phase which are balanced within a PWM switching duration using switching state redundancies for each pole voltage level. Topology forms two stacks at the front-end which requires individual symmetrical DC source. The switching loss and conduction loss analysis is performed and compared with some of the existing 7-level multilevel level inverters (MLI) reported in various literatures to show the advantages of proposed topology. Further, the single DC source operation with two stacked capacitors and closed loop control of neutral point voltage using symmetrical 6-phase induction motor is proposed. The control algorithm for floating and DC-link stacked capacitor voltages are proposed which are independent of load power factor and modulation index. Open-loop V/f and closed loop rotor field oriented control is performed and various results at steady and transient states are presented to validate the above mentioned claims.

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A Hybrid 7-Level Inverter Using Low-Voltage Devices and Operation With Single DC-Link

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