High frequency three-phase PWM grid connected drive using silicon-carbide switches

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This paper presents controller design procedure for a fully silicon-carbide (SiC) based three-phase grid-connected PWM drive. The influence of the feedforward compensation for the presented setup is studied and the transfer function of the system with feedforward is derived and compared with the normal condition. The presented analytical model helps to calculate the parameters of the close-loop system with the feedforward compensation. According to this model, the stability analysis can be carried out more accurately and a valid comparison can be provided between the system without and with this compensation. The controller is designed for a 5 kW SiC based three-phase rectifier (switching frequency 50 kHz) connected to a 7.5kW SiC based inverter (switching frequency 32 kHz). Experimental results are also carried out to validate the operation of the controller under different operating conditions. A failure test is also conducted to highlight the drawbacks of feedforward with high forward gain.
Title of host publicationProceedings of the 2nd IEEE Annual Southern Power Electronics Conference
Number of pages6
Publication date2016
ISBN (Print)978-1-5090-1547-4
ISBN (Electronic)978-1-5090-1546-7
StatePublished - 2016
Event2nd IEEE Annual Southern Power Electronics Conference - Auckland, New Zealand
Duration: 5 Dec 20168 Dec 2016
Conference number: 2


Conference2nd IEEE Annual Southern Power Electronics Conference
LandNew Zealand