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.
|Title of host publication||ICPEE 2021 - 2021 1st International Conference on Power Electronics and Energy|
|Number of pages||6|
|Publisher||IEEE Signal Processing Society|
|Publication date||2 Jan 2021|
|Publication status||Published - 2 Jan 2021|
|Event||1st IEEE International Conference on Power Electronics and Energy, ICPEE 2021 - Virtual, Bhubaneswar, India|
Duration: 2 Jan 2021 → 3 Jan 2021
|Conference||1st IEEE International Conference on Power Electronics and Energy, ICPEE 2021|
|Period||02/01/2021 → 03/01/2021|
|Series||ICPEE 2021 - 2021 1st International Conference on Power Electronics and Energy|
Bibliographical notePublisher Copyright:
© 2021 IEEE.
- Dead-time compensation
- induction motor drive
- pulse-width modulated voltage source inverter