A new AC motor driven by travelling magnetic field excited on LC ladder circuit without its nonlinearity

Issue title: 20th International Symposium on Applied Electromagnetics and Mechanics

Guest editors: Theodoros Theodoulidis, Christos Antonopoulos, Nikolaos Kantartzis, Ioannis Rekanos and Theodoros Zygiridis

Article type: Research Article

Authors: Kato, Masayuki^{a; †;} | Hirata, Katsuhiro^{b; †}

Affiliations: [a] Graduate School of Engineering, Ibaraki University, Ibaraki, Japan | [b] Graduate School of Engineering, Osaka University, Osaka, Japan

Correspondence: [*] Corresponding author: Masayuki Kato, Graduate School of Engineering, Ibaraki University, Ibaraki, Japan. E-mail: [email protected]

Note: [†] These authors contributed equally to this work.

Abstract: In three-phase AC motors, three-phase AC voltage system is essential to generate a rotating magnetic field. Three- phase AC motors also require a three-phase inverter for variable speed and torque operation. In general, the number of switching devices used in three-phase inverter is not less than six and decreasing its number is difficult. This paper focuses on an LC ladder circuit consisting of linear inductors and capacitors. This paper presents a new operating method of the AC motor based on a propagating magnetic field. It is successfully excited by connecting one single-phase AC power supply to the end of the LC ladder circuit. The induction motor operated by the presented method produces torque as in general induction motors.

Keywords: AC motors, distributed-element circuit, electrical machines, electromagnetic field analysis, LC ladder circuit, rotating magnetic field

DOI: 10.3233/JAE-220152

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 71, no. S1, pp. S229-S238, 2023