A Modified High-Efficient Step-Up Sepic for DC Motor Drives

Abstract

In this paper, Single-Ended Primary Inductor Converter (SEPIC) fed DC motor is proposed. Soft-switching technique such as Zero-Voltage-Switching (ZVS) and Zero-Current-Switching (ZCS) operation plays a vital role in high voltage applications. Zero-Current-Switching (ZCS) operation achieved due to resonance between the resonant inductor and the capacitor by using output diode and its reverse-recovery loss is subsequently reduced. Zero-Voltage-Switching (ZVS) operation is achieved by using coupled inductor and auxiliary inductor. The model has been simulated through MATLAB/SIMULINK using Diode Bridge, SEPIC topology and closed loop DC motor load and it is modeled analytically. The proposed system is modeled with input side Diode Bridge Rectifier and SEPIC Topology with Proportional Integral (PI) controller. The soft switching scheme for the proposed topology is developed with closed loop motor load. The motor voltage is achieved twice the rated voltage. The results are generated in MATLAB/SIMULINK and are shown.

Keywords

• SEPIC topology
• voltage multiplier
• zero current- switching (ZCS)
• zero-voltage-switching (ZVS).