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Proposed Fault-tolerant multi-level inverter

Proposed Fault-tolerant multi-level inverter

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Fig. 1 Proposed Fault-tolerant multi-level inverter
A Fault Tolerant-MLI with Modified PWM Technique for Symmetrical and Asymmetrical Voltage Levels
Conference Paper
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  • Dec 2022
In the current scenario, fault-tolerant multilevel inverters (FTMLIs) have become necessary in driving emergency or critical loads with high-quality output voltage. This article introduces a new FTMLI, which can tolerate different types of single and multi-switch faults under symmetrical and asymmetrical voltage modes. The proposed converter has mu...
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Context 1
... proposed converter consists of four voltage sources, eight unidirectional switches S1, S2, S3, S4, S5, S6, S5'and S6' and two bidirectional switches S7 and S8 which are shown in Fig.1. From the figure, the switches S5 and S6 experience the highest voltage stress and their conduction time are also high. ...
Context 2
... the redundant switches across switches S5 and S6 also produce more redundant switching states. In Fig.1, based on the magnitude of the voltage source, the converter is classified into symmetric and asymmetric. ...
Context 3
... on S4S8 (Group-8): From Fig.1, when OC faults occur on S4 and S8 simultaneously, switching states for voltage levels +V, +2V, ±3V, ±4V, ±5V, -6V, -7V, and -8V become unavailable, therefore switching states are discarded for +8V and +7V and available switching states are utilized to get the output voltage as shown in Fig. 5(i). ...
Context 4
... proposed converter consists of four voltage sources, eight unidirectional switches S1, S2, S3, S4, S5, S6, S5'and S6' and two bidirectional switches S7 and S8 which are shown in Fig.1. From the figure, the switches S5 and S6 experience the highest voltage stress and their conduction time are also high. ...
Context 5
... the redundant switches across switches S5 and S6 also produce more redundant switching states. In Fig.1, based on the magnitude of the voltage source, the converter is classified into symmetric and asymmetric. ...
Context 6
... on S4S8 (Group-8): From Fig.1, when OC faults occur on S4 and S8 simultaneously, switching states for voltage levels +V, +2V, ±3V, ±4V, ±5V, -6V, -7V, and -8V become unavailable, therefore switching states are discarded for +8V and +7V and available switching states are utilized to get the output voltage as shown in Fig. 5(i). ...