Stability Issue of Cascaded Systems with Consideration of Switching Ripple Interaction
Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review
Author(s)
Detail(s)
| Original language | English |
|---|---|
| Article number | 8494812 |
| Pages (from-to) | 7040-7052 |
| Journal / Publication | IEEE Transactions on Power Electronics |
| Volume | 34 |
| Issue number | 7 |
| Online published | 16 Oct 2018 |
| Publication status | Published - Jul 2019 |
| Externally published | Yes |
Link(s)
Abstract
Impedance-based criteria are often used for assessing the stability of cascaded converter systems. In this paper, it is pointed out that the switching ripple interaction (SRI) between the source converter and the load converter in a cascaded system would change the gain of the pulsewidth modulation of the source converter, causing the cut-off frequency and the phase margin of the source converter to change accordingly. Thus, even if a cascaded system is shown to be stable under an impedance-based criterion, it can, in fact, be unstable due to the SRI. This paper proposes an adaptive modulation sample-and-hold method for eliminating the effect of the SRI. A 48 V-12 V-5 V cascaded system consisting of two buck converters is tested for verification.
Research Area(s)
- Adaptive, Cascaded system, Sample-and-hold, stability issue, Switching ripple interaction (SRI)
Citation Format(s)
Stability Issue of Cascaded Systems with Consideration of Switching Ripple Interaction. / Li, Xin; Ruan, Xinbo; Xiong, Xiaoling et al.
In: IEEE Transactions on Power Electronics, Vol. 34, No. 7, 8494812, 07.2019, p. 7040-7052.Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review
