Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Performance Improvement of Voltage-mode Controlled Interleaved Buck Converters

  • Veerachary Mummadi (Dept. of Electrical Engineering, Indian Institute of Technology Delhi)
  • Published : 2005.04.01
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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

References

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