Loss analysis of permanent-magnet motor considering carrier harmonics of PWM inverter using combination of 2-D and 3-D finite-element method

• Published in: IEEE transactions on magnetics Vol. 41; no. 5; pp. 1980 - 1983
• Main Authors: Yamazaki, K., Watari, S.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: New York, NY IEEE 01.05.2005; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Carrier harmonics; Carriers; combined 3-D/2-D analysis; core loss; Cross-disciplinary physics: materials science; rheology; eddy-current loss; Exact sciences and technology; Finite element method; Finite element methods; Frequency domain analysis; Harmonic analysis; Harmonics; inverter; Inverters; Magnetic analysis; Magnetic fields; Magnetism; Materials science; Mathematical analysis; Modulation; Motors; Other topics in materials science; Permanent magnet motors; permanent-magnet motor; Physics; Pulse duration modulation; Pulse inverters; Pulse width modulation inverters; Time domain analysis; Two dimensional displays; eddy-current loss; permanent-magnet motor; Iron loss; combined 3-D/2-D analysis; Permanent magnets; Magnetism; core loss; inverter; Carrier harmonics; Eddy currents; Engines
• ISSN: 0018-9464; 1941-0069
• DOI: 10.1109/TMAG.2005.846278

In this paper, we propose a novel method to calculate harmonic losses of permanent-magnet motors driven by pulsewidth modulation inverters. First, two-dimensional (2-D) nonlinear time-domain finite-element analysis is applied to estimate the harmonic rotational magnetic field at the air gap of the motor. Next, the three-dimensional frequency domain finite-element analyses at each remarkable harmonic field are carried out with the results of the harmonic gap flux densities obtained by the 2-D analysis. Using this procedure, the magnet eddy-current loss caused by the carrier harmonics of the inverter can be calculated with practical computer resources.