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Floating capacitor voltage regulation in diode clamped hybrid multilevel converters
2009 IEEE Electric Ship Technologies Symposium, 2009The family of hybrid topologies consisting primarily of a main Neutral Point Clamped (NPC) 3-phase inverter followed by one or more series connected H-Bridges in each output phase show promise in medium voltage applications requiring high power quality and minimal size and weight. Another distinct advantage of this topology is the ability to supply the
James A. Ulrich, Ashish R. Bendre
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Diode-clamped multilevel converters: a practicable way to balance DC-link voltages
IEEE Transactions on Industrial Electronics, 2002The converter topologies identified as diode-clamped multilevel (DCM) or, equivalently, as multipoint clamped (MPC), are rarely used in industrial applications, owing to some serious drawbacks involving mainly the stacked bank of capacitors that constitutes their multilevel DC link. The balance of the capacitor voltages is not possible in all operating
MARCHESONI, MARIO, P. TENCA
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Voltage Balancing Control of Diode-Clamped Multilevel Converters with Passive Front-Ends
2007 IEEE International Symposium on Industrial Electronics, 2007In the previous literature, it has been reported that it is not possible to guarantee the balance of the dc-link capacitor voltages of three-phase diode-clamped multilevel dc-ac converters with passive front-ends for high modulation indices, especially for more than three levels.
Sergio Busquets-Monge +3 more
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A Current Flow Model for m-Level Diode-Clamped Multilevel Converters
IECON 2006 - 32nd Annual Conference on IEEE Industrial Electronics, 2006Multilevel converters have gained much attention in recent years since they have been a key technology of power electronics to reach the high power ratings required by many applications. Some topological limitations such as dc side voltage balancing, however, have hindered the use of these converters.
S.A. Khajehoddin, A. Bakhshai, P.K. Jain
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A Simplified Virtual Vector PWM for Four-Level Diode-Clamped Converter
IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society, 2019The inherent problem of dc-link capacitor voltage imbalance in multilevel diode-clamped converters limits their development and industrial applications. By using conventional space vector PWM (CSVPWM), for higher voltage levels (>3), the balancing of capacitors voltages cannot be attained under some operational conditions.
Qamar Muhammad Attique +2 more
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Predictive control of a back to back Diode Clamped Multilevel converter
2010 IEEE International Conference on Industrial Technology, 2010In this work, a back-to-back Diode Clamped Multilevel converter system using Model Predictive Control is evaluated. DC link voltage balance and currents as main parameters are optimized by means of a proper cost function design. This strategy allows fast system response and capacitors voltage balance under various operating conditions including active ...
Santiago A. Verne, Maria I. Valla
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A diode-clamped multilevel converter with reduced number of clamping diodes
Nineteenth Annual IEEE Applied Power Electronics Conference and Exposition, 2004. APEC '04., 2004This paper presents a diode-clamped multilevel converter topology with reduced number of clamping diodes. The novel topology uses a combination of multilevel converter cells with different number of levels. The proposed topology and its switching pattern are discussed based on a five-level converter, and it can be easily extended to N-level converter ...
null Zhiguo Pan +3 more
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DC Link Capacitor Voltage Balancing Method for Diode-Clamped Multilevel Converters
2019 IEEE 28th International Symposium on Industrial Electronics (ISIE), 2019This paper proposes a new capacitor voltage balancing method for diode-clamped multilevel inverters. In this method, proper redundant switching state is selected according to clamp points' voltages. The proposed method is independent of the phase and level numbers and is computationally optimized for practical implementation.
Jalal Amini, Mehrdad Moallem
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Voltage-balance limits in four-level diode-clamped converters with passive front ends
IEEE 2002 28th Annual Conference of the Industrial Electronics Society. IECON 02, 2003Multilevel diode-clamped converters with more than three levels cannot maintain voltage balance in the dc-link capacitors for some operating conditions due to the existence of dc currents in the middle points. Since capacitors are either completely charged or discharged for those conditions, this circumstance severely limits practical application of ...
J. Pou, R. Pindado, D. Boroyevich
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A new balancing technique with power losses minimization in Diode-Clamped Multilevel Converters
2007 European Conference on Power Electronics and Applications, 2007A new PWM technique, capable of achieving a correct dc-link capacitor voltages balance in Diode- Clamped Multilevel inverters, within the limits defined by the theory, is presented. This result is obtained while decreasing the switching power losses when compared to techniques based on the use of redundant switching vectors.
BORGHETTI, GIOVANNI +4 more
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