Article: An improved one cycle control technique for switching buck regulators Journal: International Journal of Power Electronics (IJPELEC) 2024 Vol.20 No.4 pp.338 - 372 Abstract: One cycle control (OCC), a nonlinear technique for controlling switch-mode converters, is known for its quick response to reference and source-voltage changes. However, OCC, in its conventional form, cannot respond to load-side disturbances. This results in oscillations and steady-state error in the load-voltage with respect to the reference-signal. In this paper, an improved version of OCC is presented for a single-switch, single-diode buck-regulator, where the core OCC block is supported by a derivative feedback-block and an inductor dc-voltage-drop estimator-block. The former ensures that the system behaves as an over-damped one, thereby eliminating overshoots. The latter ensures that steady state errors are eliminated for all loads. The strategy is found to be stable and insensitive to parameter variations in a wide range. Its performance is verified by simulations on a digital PC and experiments on a laboratory prototype. The results are encouraging and confirm the superior performance of the strategy. Inderscience Publishers - linking academia, business and industry through research

Title: An improved one cycle control technique for switching buck regulators

Authors: Debanjan Dhara; Sanchayita Das; Suvarun Dalapati

Addresses: Department of Electrical Engineering, Indian Institute of Engineering Science and Technology (IIEST), Shibpur, P.O. Botanic Garden, Howrah – 711103, West Bengal, India ' Department of Electrical Engineering, Indian Institute of Engineering Science and Technology (IIEST), Shibpur, P.O. Botanic Garden, Howrah – 711103, West Bengal, India ' Department of Electrical Engineering, Indian Institute of Engineering Science and Technology (IIEST), Shibpur, P.O. Botanic Garden, Howrah – 711103, West Bengal, India

Abstract: One cycle control (OCC), a nonlinear technique for controlling switch-mode converters, is known for its quick response to reference and source-voltage changes. However, OCC, in its conventional form, cannot respond to load-side disturbances. This results in oscillations and steady-state error in the load-voltage with respect to the reference-signal. In this paper, an improved version of OCC is presented for a single-switch, single-diode buck-regulator, where the core OCC block is supported by a derivative feedback-block and an inductor dc-voltage-drop estimator-block. The former ensures that the system behaves as an over-damped one, thereby eliminating overshoots. The latter ensures that steady state errors are eliminated for all loads. The strategy is found to be stable and insensitive to parameter variations in a wide range. Its performance is verified by simulations on a digital PC and experiments on a laboratory prototype. The results are encouraging and confirm the superior performance of the strategy.

Keywords: one cycle control; OCC; buck converter; derivative-feedback; inductor-voltage; overshoot.

DOI: 10.1504/IJPELEC.2024.142633

International Journal of Power Electronics, 2024 Vol.20 No.4, pp.338 - 372

Received: 01 Feb 2024
Accepted: 18 Aug 2024
Published online: 12 Nov 2024 *

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Title: An improved one cycle control technique for switching buck regulators

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