MAGNET EDDY CURRENT LOSS ANALYZING METHOD FOR PM MOTOR

摘要

PPROBLEM TO BE SOLVED: To easily calculate the magnet eddy current loss of a PM motor in a calculation time equivalent to that of two-dimensional analysis. PSOLUTION: The two-dimensional model of a PM motor is created (S1), and two-dimensional magnetic field analysis by a finite element method is carried out by using the two-dimensional model of the PM motor to search the time change of the magnetic flux density of the inside of a magnet without considering the eddy currents of the magnet (S2), and the time change of the magnetic flux density of the inside of the magnet is given to the three-dimensional model of only the magnet (S3), and three-dimensional analysis under the consideration of the eddy currents of the magnet is carried out by a finite element method from the magnet three-dimensional model and the time change of the magnetic flux density (S4), and magnet eddy current loss density is calculated from the thus obtained time change of the eddy current density of the magnet (S5). PCOPYRIGHT: (C)2008,JPO&INPIT