Fault tolerance performance of dual‐inverter‐based six‐phase drive system under single‐, two‐, and three‐phase open‐circuit fault operation

Melo, Victor F. M. B.; Jacobina, Cursino B.; Rocha, Nady

doi:10.1049/iet-pel.2016.0724

Cited by 19 publications

(17 citation statements)

References 32 publications

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“…In this case, the phase voltage reference is obtained using (6) with a dc offset of 1/2. Modulation indices for two inverters are calculated as (see (7)) where M max = 1.05 represents the maximal modulation index value. Using M 1 and M 2 , one is able to perform the unequal reference sharing (URS) as in [18] and to produce voltage references for VSI 1…”

Section: Modulation Methodsmentioning

confidence: 99%

“…Equations (7) and (8) can be applied for any r. From that point of view, these, so-called URS algorithms, are simpler than any coupled inverter control. In general, only VSI 2 operates in PWM mode for modulation indices up to M max /(r + 1).…”

Section: Modulation Methodsmentioning

confidence: 99%

“…OeW drives are considered as an alternative to single-sided multilevel inverter feeding, which enables the realisation of multilevel supply by using simpler inverter structures [1,2]. The main benefits of this concept are related to the distributed machine feeding structure, which allows easier inverter construction, offers several options for drive reconfiguration [3,4], and increases possibilities for post-fault control development [5][6][7]. OeW drives offer greater scope for increasing the operating speed range [3,8,9].…”

Section: Introductionmentioning

confidence: 99%

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Dc‐link voltage stability analysis technique for hybrid five‐phase open‐end winding drives

Darijevic¹,

Jones

Levi

2019

IET Electric Power Applications

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This paper studies the dc-link voltage stability for a hybrid five-phase open-end winding (OeW) drive operating under carrier based (CB) pulse-width modulation (PWM). The drive consists of a five-phase induction machine, supplied using one three-level and one two-level voltage source inverter (VSI). This configuration is analysed for the case of isolated dc-link rails, while dc-link voltage ratio is considered as an additional degree of freedom. It is demonstrated that different dc-link voltage ratios lead to the different overall number of voltage levels across stator windings. Modulation strategies are investigated and their performances are analysed from the dc-link voltages stability point of view. An analytical method for dc-link voltage stability analysis is presented. Results show that the four-level configuration always leads to stable dc-link voltages, regardless of the modulation strategy. On the other hand, if six-level configuration is combined with modulation strategies that lead to an optimal harmonic performance, not all dc-link capacitor voltages will be in balance depending on the operating conditions.

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Section: Modulation Methodsmentioning

confidence: 99%

Section: Modulation Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dc‐link voltage stability analysis technique for hybrid five‐phase open‐end winding drives

Darijevic¹,

Jones

Levi

2019

IET Electric Power Applications

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“…So, the currents in the other two phases are the same with an opposite direction each other. From (1) and 7, the magnitude of the current vector can be obtained as…”

Section: Localisation For the Leg Open-circuit Faultsmentioning

confidence: 99%

Detection and identification of multiple IGBT open‐circuit faults in PWM inverters for AC machine drives

Bae

Lee

Nguyễn

2019

IET Power Electronics

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This study proposes a new scheme for online detection and identification of single and multiple insulated-gate bipolar transistor (IGBT) open-circuit faults in three-phase pulse-width modulation (PWM) inverters of AC machine drives, which is based on Park's vector of machine phase currents. First, the switch open-circuit faults are detected by monitoring dwell times of the vector of the actual phase currents expressed in the stationary reference frame in each sector, where the normalisation of the current to its reference value is utilised, by which the immunity to the false alarms in transient conditions is improved significantly. Then, the IGBT open-circuit faults are identified, where leg open-circuit conditions are in the first place determined based on the average values of the normalised line-to-line currents. Next, the single open-circuit IGBT is located from the polarity of the corresponding phase current. By the proposed diagnosis method, the fault detection time is at the longest about 52.3 and 54% of a fundamental period in the simulation and experimental tests, respectively, and the 27 possible cases of IGBT open-circuit faults combined for all IGBTs in the inverter can be identified. In addition, this algorithm can be implemented without any additional hardware and computational burden.

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“…Once the TVP are identified, the switching times of the switches can be found by solving (32) and (33) Since all switching vectors always have integer coordinates, the solutions are essentially the partial parts of the coordinates (Figure 10).…”

Section: Calculation Of the Switching Times Of The Switchesmentioning

confidence: 99%

A Novel Dual Three-Phase Multilevel Space Vector Modulation for Six-Phase Multilevel Inverters to Drive Induction Machine

Bekrar¹,

Bouhali²,

Khadar³

et al. 2019

MMC_A

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This paper proposes a novel dual three-phase Space Vector Modulation (SVM) for sixphase multilevel inverter to control a Six Phase Induction Machine (SPIM). The main idea is to control the six-phase multilevel inverter as two three-phase (1, 3 and 5 phases for the first one and 2, 4 and 6 phases for the second one) multilevel inverters separately by SVM of the N-level three-phase Separate DC Source (SDCS) inverter. This enables a great the simplification of the control algorithm for six phase multilevel (N level) inverter drive. In Six-Phase SVM, N6 vectors are used so if two level N=2, 3 level or 4 level, implies 64 vectors, 729 vectors, 15625 vectors are used respectively. However, in a proposed dual three-phase SVM, we use N3 vectors so if 2 level, 3 level or 4 level implies 8 vectors, 27 vectors, 125 vectors are used respectively to control the six-phase multilevel inverters as two three-phase multilevel inverter with the same three-phase multilevel SVM. Whereas the first three-phase inverter is composed by 1, 3, and 5 phases and the second three-phase is composed by 2, 4 and 6 phases. This allows to have a new modulation technique for six-phase multi-level inverter and a great simplification of the classical six-phase SVM control algorithm. The simulation results of the Indirect Field Oriented Control (IFOC) of six-phase induction machine drive fed by stacked multilevel inverters are given to highlight the performance of the proposed control structure.

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Fault tolerance performance of dual‐inverter‐based six‐phase drive system under single‐, two‐, and three‐phase open‐circuit fault operation

Cited by 19 publications

References 32 publications

Dc‐link voltage stability analysis technique for hybrid five‐phase open‐end winding drives

Dc‐link voltage stability analysis technique for hybrid five‐phase open‐end winding drives

Detection and identification of multiple IGBT open‐circuit faults in PWM inverters for AC machine drives

A Novel Dual Three-Phase Multilevel Space Vector Modulation for Six-Phase Multilevel Inverters to Drive Induction Machine

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