Single-Phase Rectifier with Cascaded-Transformer to Supply a Three-Phase Induction Motor with Open-End Windings
This paper presents a single-phase to three-phase AC-DC-AC step-down converter with a symmetrical DC-link voltage ratio. The proposed converter architecture is well-suited for rural distribution grid applications, where a high-voltage single-phase grid is required to transmit energy over long dista...
Saved in:
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Associação Brasileira de Eletrônica de Potência
2025-05-01
|
| Series: | Eletrônica de Potência |
| Subjects: | |
| Online Access: | https://journal.sobraep.org.br/index.php/rep/article/view/1027 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | This paper presents a single-phase to three-phase AC-DC-AC step-down converter with a symmetrical DC-link voltage ratio. The proposed converter architecture is well-suited for rural distribution grid applications, where a high-voltage single-phase grid is required to transmit energy over long distances while minimizing conduction losses. The converter consists of two cascaded H-bridge converters connected via transformers and two three-phase inverters supplying an open-end winding induction motor (OEWIM). The level-shifted pulse-width modulation (LSPWM) strategy is employed to synthesize the converter voltages. A proportional-integral (PI) controller regulates the overall DC-link voltages, while a hysteresis controller maintains the balance of the individual DC-link voltages. Additionally, a resonant PI controller ensures a sinusoidal grid current, and a Phase-Locked Loop (PLL) is used to achieve a high power factor in the grid. Compared to a conventional two-level leg topology, the proposed configuration reduces harmonic distortion and semiconductor power losses while ensuring a high power factor.
Simulation and experimental results validate the effectiveness of the PWM and control strategies.
|
|---|---|
| ISSN: | 1414-8862 1984-557X |