Comparison between symmetrical and asymmetrical single phase multilevel inverter with diode-clamped topology
MetadataShow full item record
In this paper, a different configuration based on different DC bus voltage for a diode-clamped multilevel inverter has been presented. Two different symmetrical and asymmetrical arrangements of a four-level diode clamped inverters have been compared, in order to find an optimum arrangement with lower switching losses and optimised output voltage quality. The optimised asymmetrical arrangement has been compared with a conventional four- level inverter. The comparison results show that an asymmetrical configuration can obtain more voltage levels in output voltage with same number of component compared with the conventional four-level inverter and this will lead to the reduction of harmonic content of output voltage. A predictive current control technique has been carried out to verify the viability of new configuration. The advantages of this control method are simplicity and applicability for n-level multilevel inverters, without a significant change in the control circuit.
Showing items related by title, author, creator and subject.
A hybrid cascade converter topology with series-connected symmetrical and asymmetrical diode-clamped H-bridge cellsNami, A.; zare, F.; Ghosh, Arindam; Blaabjerg, F. (2011)A novel H-bridge multilevel pulsewidth modulation converter topology based on a series connection of a high-voltage diode-clamped inverter and a low-voltage conventional inverter is proposed in this paper. A dc link voltage ...
Voltage-sharing converter to supply single-phase asymmetrical four-level diode-clamped inverter with high power factor loadsBoora, A.; Nami, A.; zare, F.; Ghosh, Arindam; Blaabjerg, F. (2010)The output voltage quality of some of the single-phase multilevel inverters can be improved when their dc-link voltages are regulated asymmetrically. Symmetrical and asymmetrical multilevel diode-clamped inverters have ...
Bearing Damage Analysis by Calculation of Capacitive Coupling between Inner and OuterRaces of a Ball BearingAdabi, J.; zare, F.; Ledwich, G.; Ghosh, Arindam; lorenz, R. (2008)Bearing damage in modern inverter-fed AC drive systems is more common than in motors working with 50 or 60 Hz power supply. Fast switching transients and common mode voltage generated by a PWM inverter cause unwanted shaft ...