In an open-loop V/f controlled high-power low-voltage induction motor drive, sub-harmonic oscillations are commonly observed, especially at light-load and low-frequency operation, because of the dead-time which is introduced to avoid shoot-through in the dc-bus of the inverter. In this paper, such oscillations due to dead-time have been studied and substantially reduced by using a simple and effective dead-time compensation method. A two-step soft-starting method has also been proposed to achieve a fast acceleration of high-power motors without exceeding the current protection limit of the inverter. Experiments have been performed on a 355 kW squirrel cage induction motor drive supplied by a 500 kVA Si-IGBT based voltage source inverter. The steady-state and dynamic performances of the drive with these methods have been successfully verified by apposite experimental results.
|Titel||ICPEE 2021 - 2021 1st International Conference on Power Electronics and Energy|
|Forlag||IEEE Signal Processing Society|
|Publikationsdato||2 jan. 2021|
|Status||Udgivet - 2 jan. 2021|
|Begivenhed||1st IEEE International Conference on Power Electronics and Energy, ICPEE 2021 - Virtual, Bhubaneswar, Indien|
Varighed: 2 jan. 2021 → 3 jan. 2021
|Konference||1st IEEE International Conference on Power Electronics and Energy, ICPEE 2021|
|Periode||02/01/2021 → 03/01/2021|
|Navn||ICPEE 2021 - 2021 1st International Conference on Power Electronics and Energy|
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