TY - GEN
T1 - Small-Signal Discrete-Time Modeling and Stability Analysis of Digital-Controlled DC-AC Converter with Symmetric PWM
AU - Wu, Xuanlyu
AU - Zhao, Xin
AU - Kang, Zhen
AU - Li, Weilin
AU - Wu, Xiaohua
N1 - Publisher Copyright:
© 2019 IEEE.
PY - 2019/7
Y1 - 2019/7
N2 - Exact small-signal discrete-time model can be used for direct design of digital compensators for digitally controlled PWM DC-DC converters. Based on quasi-static approximation, this modeling approach for DC-DC converters can be extended to DC-AC converters. This paper proposed a small-signal discrete-time modeling approach for digitally controlled DC-AC converter driven by symmetric PWM signal, which is widely used in practice. The proposed model is based on well-known approaches to discrete-time modeling and the standard Z-transform and is well suited for stability analysis and direct digital compensator design. This paper presents general results valid for any digital-controlled converters with symmetric PWM. Specific examples, including close-form expressions for control-to-output transfer function and stability boundary are given for H-bridge current source inverter. The model is verified by experiment and system identification.
AB - Exact small-signal discrete-time model can be used for direct design of digital compensators for digitally controlled PWM DC-DC converters. Based on quasi-static approximation, this modeling approach for DC-DC converters can be extended to DC-AC converters. This paper proposed a small-signal discrete-time modeling approach for digitally controlled DC-AC converter driven by symmetric PWM signal, which is widely used in practice. The proposed model is based on well-known approaches to discrete-time modeling and the standard Z-transform and is well suited for stability analysis and direct digital compensator design. This paper presents general results valid for any digital-controlled converters with symmetric PWM. Specific examples, including close-form expressions for control-to-output transfer function and stability boundary are given for H-bridge current source inverter. The model is verified by experiment and system identification.
UR - http://www.scopus.com/inward/record.url?scp=85075779492&partnerID=8YFLogxK
U2 - 10.1109/ICCA.2019.8899910
DO - 10.1109/ICCA.2019.8899910
M3 - 会议稿件
AN - SCOPUS:85075779492
T3 - IEEE International Conference on Control and Automation, ICCA
SP - 201
EP - 204
BT - 2019 IEEE 15th International Conference on Control and Automation, ICCA 2019
PB - IEEE Computer Society
T2 - 15th IEEE International Conference on Control and Automation, ICCA 2019
Y2 - 16 July 2019 through 19 July 2019
ER -