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Performance Improvement of Voltage-mode Controlled Interleaved Buck Converters  

Veerachary Mummadi (Dept. of Electrical Engineering, Indian Institute of Technology Delhi)
Publication Information
Journal of Power Electronics / v.5, no.2, 2005 , pp. 104-108 More about this Journal
Abstract
This paper presents the performance improvement of voltage-mode controlled interleaved synchronous buck converters. This is a voltage-mode controlled scheme, where the controllers do not need an external saw-tooth generator for PWM generation and the loop design is easier. The controller implementation requires only a single error amplifier and gives almost current mode control performance. The control scheme uses voltage feedback with two loops similar to current mode control: one for the slow outer loop and the other for the faster inner PWM control loop. To improve the performance of the converter system a coupled inductor is used. This coupled inductor reduces the magnetic size and also improves the converter's transient performance without increasing the steady-state current ripple. The effectiveness of the proposed control scheme is demonstrated through PSIM simulations.
Keywords
Interleaved buck converter; Coupled inductor; Voltage-mode control; V² control; Ripple cancellation;
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  • Reference
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