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

Babaei, Ebrahim; Mahmoodieh, Mir Esmaeel Seyed; Sabahi, Mehran

doi:10.6113/jpe.2011.11.6.793

Cited by 26 publications

(13 citation statements)

References 17 publications

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“…By using a free ripple input current converter, maximum power point oscillations will be avoided, which causes to achieve fast steady state responses . In Babaei et al, the output voltage ripple of a dc‐dc buck converter is eliminated and the minimum values of the inductor and capacitor for canceling the output voltage ripple is calculated. However, this converter suffers from hard switching drawbacks; consequently, it has unavoidable switching losses.…”

Section: Introductionmentioning

confidence: 99%

A new non‐isolated free ripple input current bidirectional DC‐DC converter with capability of zero voltage switching

Saadatizadeh

Heris

Sabahi

et al. 2017

Circuit Theory & Apps

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Summary In this paper, a new nonisolated free ripple input current bidirectional dc‐dc converter with capability of zero voltage switching (ZVS) is proposed. The free ripple input current condition at low voltage side is achieved by using third winding of a coupled inductor and a capacitor for the whole range of duty cycles. In the proposed structure, the voltage conversion ratio can be more increased by adding the turn ratio of the second winding of the coupled inductor for the whole range of duty cycles. By adjusting the value of an auxiliary inductor in the topology of the converter, according to the power, the ZVS operation of the implemented 2 switches can be achieved throughout the whole power range. The mentioned features of proposed converter are validated theoretically for both boost and buck operations. In this paper, the proposed converter is analyzed for all operating modes. Moreover, all equations of the voltages and currents of all components, voltage conversion ratio, the required conditions for ZVS operation of switches, and also required conditions for canceling input current ripple at low voltage side are obtained. Finally, the performance of the proposed converter is reconfirmed through experimental and EMTDC/PSCAD simulation results.

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Section: Introductionmentioning

confidence: 99%

A new non‐isolated free ripple input current bidirectional DC‐DC converter with capability of zero voltage switching

Saadatizadeh

Heris

Sabahi

et al. 2017

Circuit Theory & Apps

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“…Considering (19), (20), (23), and (26), the relations of inductor current and output voltage as follows:…”

Section: Solving Output Voltage and Inductor Current Equations Using mentioning

confidence: 99%

“…The buck-boost dc-dc converter operates in DCM for L < L C and operates in CCM for L > L C [22,23]. In (65), r is equal with:…”

Section: Calculation Of Output Voltage Ripple In Steady Statementioning

confidence: 99%

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Mathematical modeling of buck–boost dc–dc converter and investigation of converter elements on transient and steady state responses

Mahery

Babaei

2013

International Journal of Electrical Power & Energy Systems

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“…High output voltage, same polarities with input voltage source and high efficiency are some of the advantages of the proposed boost dc–dc converter, and because of these specific features it could be used in electrical systems. The conventional dc–dc converters consist of different voltage gains in different duty cycles ( D ) , but because of limitation in converter's parameters, the value of ( D ) could not be selected higher than specific value . In the stability analysis were done for the conventional boost dc–dc converter.…”

Section: Introductionmentioning

confidence: 99%

A new DC-DC converter based on voltage-lift technique

Shahir

Babaei

Sabahi

et al. 2015

Int. Trans. Electr. Energ. Syst.

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In this paper, a new boost dc-dc converter based on voltage lift (VL) technique is proposed. There is any need for transformer, coupled inductances and sequential connections in the proposed boost converter topology. In this paper, the operating of proposed boost dc-dc converter in continuous conduction mode (CCM) and discontinuous conduction mode (DCM) was discussed, and the current and voltage equations of the inductors and capacitors were obtained with details. So, the value of critical inductance and the operating of the proposed dc-dc converter between CCM and DCM were presented. The switching currents of each switch were analyzed. The switches, diodes, inductors and capacitors root-mean-square (RMS) current stresses were discussed. Finally, the correct performance of the proposed converter based on presented theoretical issues is verified by using simulation results on EMTDC/PSCAD software program and experimental results by using laboratory prototype. Figure 11. Current simulation results of the switches S 1 and S 2 in the proposed boost dc-dc converter; (a) in CCM; (b) critical operating mode; (c) in DCM.

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

Cited by 26 publications

References 17 publications

A new non‐isolated free ripple input current bidirectional DC‐DC converter with capability of zero voltage switching

A new non‐isolated free ripple input current bidirectional DC‐DC converter with capability of zero voltage switching

Mathematical modeling of buck–boost dc–dc converter and investigation of converter elements on transient and steady state responses

A new DC-DC converter based on voltage-lift technique

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