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A simplified controller and detailed dynamics of constant off-time peak current control

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Abstract
A fast and reliable current control is often the base of power electronic converters. The traditional constant frequency peak control is unstable above 50 % duty ratio. In contrast, the constant off-time peak current control (COTCC) is unconditionally stable and fast, so it is worth analyzing it. Another feature of the COTCC is that one can combine a current control together with a current protection. The time dynamics show a zero-transient response, even when the inductor changes in a wide range. It can also be modeled as a special transfer function for all frequencies. The article shows also that it can be implemented in a simple analog circuit using a wide temperature range IC, such as the LM2903, which is compatible with PV conversion and automotive temperature range. Experiments are done using a 3 kW step-up converter. A drawback is still that the principle does not easily fit in usual digital controllers up to now.
Keywords
analog processing circuits, circuit analysis, circuit simulation and modelling, current control, PV conversion, OPTIMAL TRAJECTORY CONTROL, CONVERTER, MODE

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Chicago
Van den Bossche, Alex, Ekaterina Dimitrova, Vencislav Valchev, and Firgan Feradov. 2017. “A Simplified Controller and Detailed Dynamics of Constant Off-time Peak Current Control.” Journal of Electrical Engineering-elektrotechnicky Casopis 68 (5): 390–395.
APA
Van den Bossche, Alex, Dimitrova, E., Valchev, V., & Feradov, F. (2017). A simplified controller and detailed dynamics of constant off-time peak current control. JOURNAL OF ELECTRICAL ENGINEERING-ELEKTROTECHNICKY CASOPIS, 68(5), 390–395.
Vancouver
1.
Van den Bossche A, Dimitrova E, Valchev V, Feradov F. A simplified controller and detailed dynamics of constant off-time peak current control. JOURNAL OF ELECTRICAL ENGINEERING-ELEKTROTECHNICKY CASOPIS. 2017;68(5):390–5.
MLA
Van den Bossche, Alex, Ekaterina Dimitrova, Vencislav Valchev, et al. “A Simplified Controller and Detailed Dynamics of Constant Off-time Peak Current Control.” JOURNAL OF ELECTRICAL ENGINEERING-ELEKTROTECHNICKY CASOPIS 68.5 (2017): 390–395. Print.
@article{8536636,
  abstract     = {A fast and reliable current control is often the base of power electronic converters. The traditional constant frequency peak control is unstable above 50 \% duty ratio. In contrast, the constant off-time peak current control (COTCC) is unconditionally stable and fast, so it is worth analyzing it. Another feature of the COTCC is that one can combine a current control together with a current protection. The time dynamics show a zero-transient response, even when the inductor changes in a wide range. It can also be modeled as a special transfer function for all frequencies. The article shows also that it can be implemented in a simple analog circuit using a wide temperature range IC, such as the LM2903, which is compatible with PV conversion and automotive temperature range. Experiments are done using a 3 kW step-up converter. A drawback is still that the principle does not easily fit in usual digital controllers up to now.},
  author       = {Van den Bossche, Alex and Dimitrova, Ekaterina and Valchev, Vencislav and Feradov, Firgan},
  issn         = {1335-3632},
  journal      = {JOURNAL OF ELECTRICAL ENGINEERING-ELEKTROTECHNICKY CASOPIS},
  keyword      = {analog processing circuits,circuit analysis,circuit simulation and modelling,current control,PV conversion,OPTIMAL TRAJECTORY CONTROL,CONVERTER,MODE},
  language     = {eng},
  number       = {5},
  pages        = {390--395},
  title        = {A simplified controller and detailed dynamics of constant off-time peak current control},
  url          = {http://dx.doi.org/10.1515/jee-2017-0072},
  volume       = {68},
  year         = {2017},
}

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