Performance characteristics of a cascaded two-level converter

Corzine, Keith; Sudhoff, Scott D.; Whitcomb, Clifford A.

doi:10.1109/60.790893

Cited by 207 publications

(100 citation statements)

References 9 publications

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“…Two points may be noted: -A competing configuration using the same number of power switches (12) is reported in [28]- [29]. This paper proposes a four-level voltage source inverter topology (dual-inverter) but uses two isolated and unequal dc-link voltages.…”

Section: Iipower Electronic Architecture Tolerant To Semiconductor Fmentioning

confidence: 99%

Space-Vector PWM Control Synthesis for an H-Bridge Drive in Electric Vehicles

Kolli¹,

Béthoux

Bernardinis³

et al. 2013

IEEE Trans. Veh. Technol.

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Abstract-This paper deals with a synthesis of Space Vector PWM control methods applied for a H-bridge inverter feeding a 3-phase Permanent Magnet Synchronous Machine in Electric Vehicle application. First, a short survey of existing power converter architectures, especially those adapted to degraded operating modes, is presented. Standard SVPWM control methods are compared with three innovative ones using EV-drive specifications in the normal operating mode. Then, a rigorous analysis of the margins left in the control strategy is presented for a semiconductor switch failure to fulfill degraded operating modes. Finally, both classic and innovative strategies are implemented in numerical simulation; their results are analyzed and discussed. Index Terms-Motor drives, Inverters, Space vector pulse width modulation (SVPWM), Permanent magnet machines, Semiconductor device reliability I.INTRODUCTIONPower converters are increasingly used in automotive applications for many reasons such as power conditioning, power management, and consumption reduction. As for any embedded transportation system, these power converters are subject to severe constraints especially regarding compactness and vehicle integration. More specifically electric vehicles (EVs) require a high degree of availability (continuity of service). In particular the constraining automotive environment is characterized by severe traction-braking cycles which induce power and thermal cycling during running phases of the vehicle [1]- [2]. Indeed, thermo-mechanical stresses have a significant impact on the lifetime power switches [3]. Consequently, there is a degradation of the semiconductor devices, which finally forces them into a failed state: short-circuit (SC) or open-circuit (OC) [2]. Such failures occurring on single power switches can affect the function of power converters and spread through the traction chain elements. It is then necessary to first isolate the fault, confine it and lastly reconfigure the control algorithms to operate in the presence of the fault. Obviously, the topology of the power converters or the power chain must be adapted to allow operation in degraded mode:-by associating a fourth additional half bridge in a three-phase inverter topology connected to the neutral point of the electric motor [4]. IFSTTAR/COSYS/LTN-Laboratoire des Technologies Nouvelles 2 LGEP-Laboratoire de Génie Electrique de Paris-by using multilevel inverters topologies used in a high power traction drive [5].-by redistributing the control efforts in a four-wheel independently driven electric vehicles [6]… Furthermore, faults may also happen on sensors and can be taken into account by active fault-tolerant control systems. For example in [7]-[8], authors consider a high-performance induction-motor drive for an EV or a hybrid one (HEV). The proposed systems detect a sensor loss or a sensor recovery and dynamically change its strategies to sustain the best control performances.Besides, faults may also occur in the electrical machine and can be considered using fa...

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Section: Iipower Electronic Architecture Tolerant To Semiconductor Fmentioning

confidence: 99%

Space-Vector PWM Control Synthesis for an H-Bridge Drive in Electric Vehicles

Kolli¹,

Béthoux

Bernardinis³

et al. 2013

IEEE Trans. Veh. Technol.

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“…This paper deals with a five-phase OeW induction motor drive, supplied using two isolated five-phase two-level voltage source inverters (VSIs) with dc-link voltages fixed in the ratio 2:1. Application of unequal dc-link voltages in the ratio 2:1 enables drive operation with output voltage waveforms equivalent to those obtainable with a four-level voltage source inverter (VSI) in the single-sided supply mode [3]. The four-level multiphase topology is aimed at the high-power and traction applications where the well-known advantages of multiphase machines and multilevel converters are of particular significance.…”

Section: Introductionmentioning

confidence: 99%

Decoupled modulation techniques for a four-level five-phase open-end winding drive

Jones

Darijevic

Levi

2014

2014 IEEE Energy Conversion Congress and Exposition (ECCE)

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AbstractThe paper studies pulse width modulation (PWM) techniques for a five-phase multilevel open-end winding drive with two inverters supplied with unequal dc-link voltages, which are in the ratio 2:1. It is shown in the paper that application of in-phase disposition modulation (PD-PWM), often used in multiphase multilevel converters, results in overcharging of the capacitor in the dc-link of the converter intended to operate at the lower dc voltage. The voltage space vector combinations which lead to the overcharging are identified and two decoupled modulation techniques which do not activate the troublesome vector combinations are proposed. The performance of the developed modulation techniques is investigated using simulations and an experimental prototype, and the results are presented in the paper.

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“…1, HB-VSCs have been utilized in Series Active Filter (SAF) [3], Dynamic Voltage Restorer (DVR) [4], and STATCOM [5] applications. Moreover, the three-phase HB-VSC topology or its close variants have been used to drive open winding induction machines [6]- [9] and dual three-phase induction machines [10]. Note that in these induction machine drive systems, these converters are considered as two 2L three-phase VSCs.…”

Section: Introductionmentioning

confidence: 99%

“…For the aforementioned 'two 2L VSCs' variants of the three-phase HB-VSC, there are PWM studies which aim at control of dual three-phase induction machines [10], common mode voltage elimination of an open winding induction machine [7], and balancing the power drawn from two isolated DC sources in an open winding induction machine drive system [8]. In [9], it has been demonstrated that by means of a space vector based PWM method a 'cascaded 2L converter' is able to generate the same converter performance as 3L neutral-point-clamped (NPC) VSC (Fig. 2), which has been thoroughly studied in the literature since it was introduced in 1981 [14].…”

Section: Introductionmentioning

confidence: 99%