Stability Analysis of a Non-Linear PWM-Controlled Buck Converter with LC Input Filter

Stability Analysis of a Non-Linear PWM-Controlled Buck Converter with LC Input Filter

This paper analyzes the control stability of a DC motor soft starter. The soft starter uses a Buck converter for current control and an LC filter at the input to reduce the current ripple of the DC power supply. The required current control bandwidth is high and can excite the resonance frequency of...

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Bibliographic Details
Published in:2021 22nd IEEE International Conference on Industrial Technology (ICIT) Vol. 1; pp. 240 - 245
Main Authors: Lendi, Daniel, Raute, Reiko, Fabri, Simon G., Galea, Roger
Format: Conference Proceeding
Language:English
Published: IEEE 10-03-2021
Subjects:
Buck converter
Buck converters
Circuit stability
Current control
DC Motor
DC motors
Limit cycle
Limit-cycles
Power system stability
Pulse width modulation
Stability analysis
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Summary:This paper analyzes the control stability of a DC motor soft starter. The soft starter uses a Buck converter for current control and an LC filter at the input to reduce the current ripple of the DC power supply. The required current control bandwidth is high and can excite the resonance frequency of the input LC filter. This paper analyzes the control stability of the non-linear system. It shows that the current control system enters a stable limit cycle at the region around the theoretical stability margin.
DOI:10.1109/ICIT46573.2021.9453633