Charge balance control of a seven-level asymmetric cascade multilevel inverter

Among the topologies of multilevel inverters, the cascade multilevel inverters have received more attention due to easier control and variety in the structure. Although the cascade multilevel inverters have several advantages, they also suffer from some drawbacks. In the fundamental frequency contro...

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Main Authors: Babaei, E., Azimpour, Y., Kangarlu, M. F.
Format: Conference Proceeding
Language:English
Subjects:
Asymmetric cascade multilevel inverter
Bridge circuits
charge balance control method
Equations
Inverters
Mathematical model
Switches
Voltage control
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Azimpour, Y.
Kangarlu, M. F.
description Among the topologies of multilevel inverters, the cascade multilevel inverters have received more attention due to easier control and variety in the structure. Although the cascade multilevel inverters have several advantages, they also suffer from some drawbacks. In the fundamental frequency control method, different value of power is drawn from different dc voltage sources and therefore they have different charge/discharge. Another problem considering the cascade multilevel inverters is the unequal power loss in the switches of different bridges. In this paper, the charge balance control method is proposed for the asymmetric cascade multilevel inverter. Applying this control method leads to equal charge of the dc voltage sources and equal loss on the power switches. Consequently, the lifetime of the dc voltage sources will be equal reducing the maintenance costs.
doi_str_mv 10.1109/PEDG.2012.6254075
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subjects Asymmetric cascade multilevel inverter
Bridge circuits
charge balance control method
Equations
Inverters
Mathematical model
Switches
Voltage control
title Charge balance control of a seven-level asymmetric cascade multilevel inverter
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