Encoderless Vector Control of AC Motors Taking into Account High Performance and Simplicity

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K05945
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Power engineering/Power conversion/Electric machinery
• Research Institution: Nagasaki University
• Principal Investigator: TSUJI Mineo 長崎大学, 工学研究科, 教授 (80145218)
• Co-Investigator(Kenkyū-buntansha): 浜崎 真一 長崎大学, 工学研究科, 准教授 (80363472)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 交流モータ / エンコーダレス制御 / ベクトル制御

Outline of Final Research Achievements

AC Motors which are divided into induction motor and synchronous motor are used widely for electrical equipments. In this case, an encoder is used to detect the speed and position for the vector control which controls electromagnetic torque instantaneously. In this research, the vector control is realized without using the encoder by estimating the speed and position. As the result, the system size is minimized and the sensor cable is removed. We have proposed a simplified encoderless vector control methods for not only the induction motor but permanent magnet synchronous motor. Especially, an estimation method of stator resistance and simple configuration of current and speed controllers are developed theoretically and experimentally. A linear model is useful for the design of controllers.

Free Research Field

電気機器制御学