Abstract
This paper proposes the design of a novel dc excitation control for a wound-rotor induction generator (WRIG) under autonomous-generation mode using a microcontroller based on a reduced instruction set chip (RISC). The source of the dc excitation control for the studied WRIG is obtained from its generated ac voltage through a step-down transformer, a bridge rectifier, and a dc-to-dc buck converter. In order to effectively modulate the desired dc voltage for controlling the generated voltage of the WRIG, a fuzzy controller embedded in the RISC-based microcontroller is properly designed and implemented using the PIC 8-bit microcontroller under voltage variations. The calculation results are sent to the pulsewidth-modulation ports to drive the power MOSFET switch of the dc-to-dc buck converter. The proposed WRIG system with its dc excitation control is practically implemented in a laboratory wound-rotor induction machine driven by a dc motor. From both experimental measurements and computer simulations, it can be concluded that the proposed isolated WRIG with its dc excitation controlled by the microcontroller can provide better voltage profile than a self-excited induction generator containing only excitation capacitors under various loading and switching conditions.
Original language | English |
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Article number | 6697862 |
Pages (from-to) | 2807-2817 |
Number of pages | 11 |
Journal | IEEE Transactions on Industry Applications |
Volume | 50 |
Issue number | 4 |
DOIs | |
Publication status | Published - 2014 |
All Science Journal Classification (ASJC) codes
- Control and Systems Engineering
- Industrial and Manufacturing Engineering
- Electrical and Electronic Engineering