Affiliations: [a] Department of Electrical Engineering, Kunsan National
University, Gunsan Jeollabuk-do, Korea | [b] Intelligent Mechatronics Research Center, KETI,
Gyeonggi-do, Korea
Correspondence:
[*]
Corresponding author: Byung-Taek Kim, Department of Electrical
Engineering Kunsan National University, Gunsan Jeollabuk-do 573-701, Korea.
Tel.: +82 63 468 9168; Fax: +82 63 469 4699; E-mail: cancmh,btkim@kunsan.ac.kr
Abstract: In this paper, various effective and oscillatory torque components
in a line-start permanent magnet (LSPM) motor are analyzed using the principle
of superposition through the analytic approach with an equivalent circuit.
According to the independent sources, in the asynchronous speed the induced
rotor current and braking stator current are derived by using the DQ equivalent
circuit and Laplace transformation. Then, two effective components and three
oscillatory components of torque are calculated quantitatively by using the
analytic torque equations. Finally, to check usefulness of the proposed method,
the current and torque characteristics are compared with finite element
analysis and measurement results for various speeds.
