Karl Raymond Roque

自己紹介/Self Introduction

Hi everyone! I’m Karl, a 2nd Year Master’s Student in the G30 Automotive Program (Electrical, Electronics, and Information Engineering). I’m from the Philippines. In my free time, I like to take pictures, cycle long distance, and eat a lot of food! I lead the passive components team in the laboratory. Nice to meet you!

初めまして！カールです。フィリピンから来ました。G30留学生自動車工学プログラム（電気電子情報工学）の修士2年生です。暇な時に、きれい写真を撮ったり、遠い場所へ自転車で行ったり、美味しい食べ物をいっぱい食べるのが好きです。私が受動素子チームのリーダーです。これから、よろしくお願いいします！ぜひ話しましょう。

研究内容/RESEARCH CONTENT

Control Methods in Circuits, Implementation of Power Factor Correction (PFC), High Power System Modelling, Loss Analysis of Vertical GaNs, Circuit Design, Transformer Design: Integrated Magnetics and Thermal Management for SST Applications

回路の制御手法、力率改善（PFC）の実装、大電力システムのモデリング、縦型GaNの損失解析、回路設計、電流検出、トランス設計：SST用途における集積磁気素子と熱管理

International Conference

[1] K. R. D. Roque, I. Masuda, S. Choi, J. Imaoka, M. Yamamoto, M. Kauhanen, and K. Tashiro, “Flatwise Windings for Improved Thermal Management in High Power Transformer Applications”, Proceedings of the 41st Applied Power Electronics Conference (APEC) 2026, San Antonio, Texas, USA, 22-26 March 2026.

[2] K. R. D. Roque, I. Masuda, S. Choi, J. Imaoka, M. Yamamoto, M. Kauhanen, and K. Tashiro, “Comparative Analysis of Flatwise and Edgewise Windings for Improved Thermal Management in Transformers”, Proceedings of the 10th International Power Electronics Conference (IPEC – ECCE Asia) 2026, Nagasaki, Japan, May 31 – June 04 2026. [to be published]

[3] K. R. D. Roque, I. Masuda, S. Choi, J. Imaoka, M. Yamamoto, M. Kauhanen, and K. Tashiro, “An Investigation on Flatwise Windings for Improved Thermal Management in Transformers”, Proceedings of the International Conference on Materials and Sustainability, Nagoya University, Nagoya, Japan, 12-14 December 2025.

[4] K. R. D. Roque, T. Warnakulasooriya, S. Choi, Y. Yonezawa, D. Arai, M. Yamamoto, Y. Ushida, and T. Oka, “Theoretical Loss Analysis of Vertical GaN MOSFETs in a Totem-pole Bridgeless PFC Considering Parameter Variation”, Proceedings of the International Conference on Materials and Sustainability, Nagoya University, Nagoya, Japan, 1-2 December 2023.

[5] Yu Yonezawa, Karl Raymond Roque, Masayoshi Yamamoto, “Noise Simulation for Front-Loading Power Electronics EMI Design in Electric Aircraft Applications”, SAE E-40 Electrified Propulsion Committee Workshop, Tokyo, Japan, 17-19 March 2026.

[6] H. Hirasawa, K. R. D. Roque, S. Choi, Y. Yonezawa, J. Imaoka, and M. Yamamoto, “Design Method of an Integrated Transformer for a Two-phase Interleaved Flyback PFC Rectifier”, Proceedings of the 16th Energy Conversion Congress and Exposition (ECCE) 2024, Phoenix, Arizona, USA, 20-24 October 2024.

国内学会

[1] K. R. D. Roque, T. Warnakulasooriya, S. Choi, Y. Yonezawa, D. Arai, M. Yamamoto, Y. Ushida, and T. Oka, “Theoretical Loss Analysis of Vertical GaN MOSFETs in a Totem-pole Bridgeless PFC Considering Drift Layer Variation”, Proceedings of the Institute of Electrical Engineers Japan – National Conference, Tokushima, Japan, 14-16 March 2024.

[2] 平沢開，Karl Raymond Dela Cruz Roque，Sihoon Choi，米澤遊，今岡淳，山本真義，“2相AC-DCインターリーブフライバックコンバータにおける統合トランスの適用と設計法”, 令和6年電気学会全国大会，2024 年

[3] 平沢開，Sihoon Choi，Karl Raymond Dela Cruz Roque，米澤遊，今岡淳，山本真義，“統合トランスを適用したAC-DCインタリーブフライバックコンバータ”, 電情報,通信学会電子通信エネルギー技術研究会，2023 年