Investigating Buck DC-DC Converter Operation in Different Operational Modes and Obtaining the Minimum Output Voltage Ripple Considering Filter Size

Ebrahim Babaei; Mir Esmaeel Seyed Mahmoodieh; Mehran Sabahi

Investigating Buck DC-DC Converter Operation in Different Operational Modes and Obtaining the Minimum Output Voltage Ripple Considering Filter Size

Ebrahim Babaei

Mir Esmaeel Seyed Mahmoodieh

Mehran Sabahi

Vol. 11, No. 6, pp. 793-800, Nov. 2011

10.6113/JPE.2011.11.6.793

Buck dc-dc converter

Critical inductance

Maximum output voltage ripple

Output voltage ripple

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Abstract

This paper investigates the operational modes of buck dc-dc converters and their energy transmission methods. The operational modes of such converters are classified in two types, discontinuous conduction mode (DCM) and continuous conduction mode (CCM). In this paper, the critical inductance relation of DCM and CCM is determined. The equations of the output voltage ripple (OVR) for each mode are obtained for a specific input voltage and load resistance range. The maximum output voltage ripple (MOVR) is also obtained for each mode. The filter size is decreased and the minimum required inductance value is calculated to guarantee the minimization of the MOVR. The experimental and simulation results in PSCAD/EMTDC prove the correctness of the presented theoretical concepts.

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Cite this article

[IEEE Style]

E. Babaei, M. E. S. Mahmoodieh, M. Sabahi, "Investigating Buck DC-DC Converter Operation in Different Operational Modes and Obtaining the Minimum Output Voltage Ripple Considering Filter Size," Journal of Power Electronics, vol. 11, no. 6, pp. 793-800, 2011. DOI: 10.6113/JPE.2011.11.6.793.

[ACM Style]

Ebrahim Babaei, Mir Esmaeel Seyed Mahmoodieh, and Mehran Sabahi. 2011. Investigating Buck DC-DC Converter Operation in Different Operational Modes and Obtaining the Minimum Output Voltage Ripple Considering Filter Size. Journal of Power Electronics, 11, 6, (2011), 793-800. DOI: 10.6113/JPE.2011.11.6.793.