Modified step-up boost converter with coupled-inductor and super-lift techniques

• Published in: IET power electronics Vol. 8; no. 6; pp. 898 - 905
• Main Authors: Bahrami, Hamid, Iman-Eini, Hossein, Kazemi, Babak, Taheri, Alireza
• Format: Journal Article
• Language: English
• Published: The Institution of Engineering and Technology 01.06.2015
• Subjects: Converters; coupled‐inductor technique; Electric potential; Gain; High voltages; inductance; inductors; Joining; leakage inductance; modified efficient step‐up boost converter; off‐state voltage; power 100 W; power convertors; reverse‐recovery problem; step‐up voltage gain; super‐lift techniques; Switches; Voltage; voltage 15 V; voltage 200 V; Voltage gain; step-up voltage gain; power convertors; inductance; reverse-recovery problem; modified efficient step-up boost converter; voltage 15 V; super-lift techniques; coupled-inductor technique; leakage inductance; power 100 W; inductors; voltage 200 V; off-state voltage
• ISSN: 1755-4535; 1755-4543; 1755-4543
• DOI: 10.1049/iet-pel.2014.0691

In this study, a modified efficient step-up boost converter is proposed. The proposed structure employs coupled-inductor and super-lift techniques to achieve high voltage gain. The super-lift stage absorbs the available energy in the leakage inductance of the coupled inductor, clamps the off-state voltage of the main switch, and reaches a moderate voltage gain. Moreover, the coupled-inductor technique offers high voltage gain, low off-state voltage for the main switch, and alleviates the reverse-recovery problem of the output diode. Hence, using these two techniques, the proposed converter achieves high step-up voltage gain and eliminates the drawbacks of the conventional boost converter. The proposed converter is analysed in details and a hardware prototype with the input voltage of 15 V, output voltage of 200 V and the nominal power of 100 W is utilised for the experimental investigation.