Method for calculating magnetic force characteristics, device for calculating magnetic force characteristics and computer program

摘要

A pre-stored database indicating a correspondence δ (depth) / ΔHcJ (coercive force increase) and a pre-stored database indicating information regarding the DY diffusion conditions (diffusion coefficient, diffusion flow and processing time with respect to the Dy diffusion) are used to calculate the distribution of the Dy injection amount in a magnet from the shape information of the magnet and the information about the Dy injection side and the distribution of ΔHcJ in the magnet from the distribution of the Dy injection amount. For a magnet with a coercive force that is not evenly distributed, a J / H curve is calculated using the calculated ΔHcJ distribution, and a demagnetization factor at a predetermined temperature is calculated using a temperature coefficient.