Name
Title | ||
|---|---|---|
Boundaries of Subharmonic Oscillations Associated to Filtering Effects of Controllers and Current Sensors in Switched Converters Under CMC |
Abstract | ||
|---|---|---|
Subharmonic oscillation is widely studied in switching converters under current mode control (CMC). Its boundary of occurrence in the design parameter space is well known in the case of an infinite bandwidth current sensor. However, in a practical implementation, either a limited bandwidth current sensor or an additional filter is used. This could have an effect on the system dynamics especially for relatively high switching frequencies. This paper discusses the effect of the additional dynamics due to finite bandwidth current sensor or additional filter on the stability and subharmonic oscillation boundaries in switching converters under CMC. It is shown that a simplified model taking into account the dynamics of the inductor current and the sensor/filter is enough to obtain accurate results concerning the prediction of the occurrence of subharmonic instabilities in switched converters. Design-oriented equations describing the occurrence of subharmonic oscillations are used to show some problems related to the additional dynamics on the ramp compensator design in single-switch dc-dc converter working in continuous conduction mode. Some proposed solutions are also discussed. Numerical simulations and experimental measurements corroborate the theoretical predictions. |
Year | DOI | Venue |
|---|---|---|
2016 | 10.1109/TIE.2015.2458966 | Industrial Electronics, IEEE Transactions |
Keywords | Field | DocType |
Current mode control, dc-dc power converters, stability criteria, switching systems | Oscillation,Control theory,Filter (signal processing),Inductor,Converters,Control engineering,Bandwidth (signal processing),System dynamics,Parameter space,Current sensor,Engineering | Journal |
Volume | Issue | ISSN |
PP | 99 | 0278-0046 |
Citations | PageRank | References |
0 | 0.34 | 0 |
Authors | ||
7 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| El Aroudi, A. | 1 | 70 | 9.31 |
| Javier Calvente | 2 | 90 | 13.88 |
| Roberto Giral | 3 | 94 | 14.17 |
| Al-Numay, M. | 4 | 0 | 0.34 |
| Abdelali El Aroudi | 5 | 177 | 35.04 |
| Mohammed S. Al-Numay | 6 | 4 | 4.55 |
| L. Martínez | 7 | 145 | 28.94 |