Multi-Objective PSO for the Sizing of a 12-Pulse Diode Rectifier: A Comparative Analysis at Room and Cryogenic Temperatures

This paper compares the optimal sizing of a 12pulse diode rectifier operating at room temperature (293 K) and at cryogenic temperature (77 K). First, a diode database is constructed from diode measurements at both temperatures. Then, using the PSO (Particle Swarm Optimization) algorithm, the converters are sized to maximise efficiency and minimise volume. The results show that the converter designed to operate at 77 K achieves efficiency levels comparable to those at 293 K (without cooling penalty). However, the cryogenic design offers significant volume advantages over the room temperature design, making it particularly beneficial for applications where volume and weight are limited.