A Comparative Reliability Study of Three Fundamental Multilevel Inverters Using Two Different Approaches

Alavi, Omid; Viki, Abbas Hooshmand; Shamlou, Sadegh

doi:10.3390/electronics5020018

Cited by 38 publications

(32 citation statements)

References 57 publications

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“…This fault has no redundant path, therefore forcing the circuit to failure state. But, the reliability of a diode is far greater than a switch, 18,19 and hence, the possibility of occurrence of this fault is very minimal.…”

Section: Ft-2 Casementioning

confidence: 99%

A reliable and efficient single‐phase modular multilevel inverter topology

Maddugari

Borghate

Sabyasachi

2019

Circuit Theory & Apps

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Bilevel inverters are replaced by multilevel inverters due to their capability of producing quality output voltage with low total harmonic distortion (THD). On the contrary, increase in number of semiconductor switches has questioned the reliability of the multilevel inverter topologies. To enhance the reliability, this paper proposes a single-phase five-level inverter topology with inherent fault-tolerant feature. The proposed inverter can sustain faults in sources and semiconductor switches by amending the switching combinations. No healthy switch is needed to be bypassed during the fault to ensure the optimum utilization of the switches. An analysis on the basis of reliability, cost, and efficiency is carried out of the proposed inverter and compared with the existing topologies. To prove the claim, the experimental results of the developed hardware model is analyzed and compared with the simulation results of MATLAB/SIMULINK.

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Section: Ft-2 Casementioning

confidence: 99%

A reliable and efficient single‐phase modular multilevel inverter topology

Maddugari

Borghate

Sabyasachi

2019

Circuit Theory & Apps

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“…28 The value of λ b for switch and diode is obtained from their datasheets. 28 The value of λ b for switch and diode is obtained from their datasheets.…”

Section: Comparative Analysismentioning

confidence: 99%

“…λ b is the base failure rate of the component, and it is defined in military handbook MIL-S-19500. 28 The value of λ b for switch and diode is obtained from their datasheets. The quality factor π Q value is considered as 1.…”

Section: Comparative Analysismentioning

confidence: 99%

A fault‐tolerant modular multilevel inverter topology

Maddugari

Borghate

Karasani³

et al. 2018

Circuit Theory & Apps

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Multilevel inverter topologies have received an increasing importance for their modular structures with better integration of renewable energy sources and reduced filtering requirements. But reliability is compromised in the process of decreasing the number of switches to produce the maximum number of voltage levels. This paper elevates a single-phase fault-tolerant inverter topology, which is modular in structure. The proposed inverter is analyzed for open-or short-circuit faults in sources and open-circuit faults in switches. Sine Pulse Width Modulation with multicarriers technique is used to control the circuit. The carrier signals are reconfigured under fault conditions based on levels to be generated by bypassing the faulted switch or source. The circuit is simulated in MATLAB/SIMULINK, and experimental setup is developed to claim the fault tolerance of proposed inverter.

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“…There are different researches related to the reliability assessment of various circuits and power converters. These circuits include multilevel inverters [9,10], DC-DC converters [11], and AC-AC converters [12].…”

Section: Introductionmentioning

confidence: 99%

Reliability evaluation of buck converter based on thermal analysis

Mojibi

Radmehr

2019

Informacije MIDEM

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The design, which is based on the concept of reliability, is impressive. In power electronic circuits, the reliability design has been shown to be useful over time. Moreover, power loss in switches and diodes plays a permanent role in reliability assessment. This paper presents a reliability evaluation for a buck converter based on thermal analysis of an insulated-gate bipolar transistor (IGBT) and a diode. The provided thermal analysis is used to determine the switch and diode junction temperature. In this study, the effects of switching frequency and duty cycle are considered as criteria for reliability. A limit of 150°C has been set for over-temperature issues. The simulation of a 12 kW buck converter (duty cycle = 42% and switching frequency = 10 kHz) illustrates that the switch and diode junction temperature are 117.29°C and 122.27°C, respectively. The results show that mean time to failure for the buck converter is 32,973 hours.

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A Comparative Reliability Study of Three Fundamental Multilevel Inverters Using Two Different Approaches

Cited by 38 publications

References 57 publications

A reliable and efficient single‐phase modular multilevel inverter topology

A reliable and efficient single‐phase modular multilevel inverter topology

A fault‐tolerant modular multilevel inverter topology

Reliability evaluation of buck converter based on thermal analysis

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