Carrier-Based Modulation Schemes Based on Symmetric Switching Patterns for Three-Phase Three-Switch Rectifier

TL;DR

This paper proposes simplified carrier-based modulation schemes for the three-phase three-switch rectifier, reducing computational complexity while maintaining performance, validated through hardware experiments and compared with traditional space vector modulation.

Contribution

Introduces two simplified carrier-based modulation schemes for TPTS converters that are easier to implement than traditional SV schemes, with validation on hardware.

Findings

Reduced implementation complexity compared to SV schemes

Validated effectiveness through hardware prototype testing

Quantitative comparison demonstrating comparable performance

Abstract

Electric Vehicle (EV) chargers are the need of the hour as EVs have invaded the commercial automobile market. The Three-Phase Three-Switch (TPTS) converter has features which make it ideal to act as the charging station because of its high efficiency at peak power rating. Traditionally, control of the TPTS converter has been achieved by the Space Vector (SV) based modulation scheme whose implementation is burdensome due to the trigonometric calculations involved. This paper introduces two simplified carrier based modulation schemes, which greatly reduce the implementation difficulty, as they require minimum mathematical computations. A quantitative comparison is made between SV scheme available in literature with the simplified scheme proposed here. The methodology followed to obtain the carrier waves is also provided. All the modulation schemes are validated with the help of a 1 kW hardware prototype.