Determination of the Magnetic Characteristics (B–H) of Material Used in a Laboratory-Rated Salient Pole Synchronous Machine Using a Novel Ampere Turns Distribution Technique

This paper presents a simple method to determine the approximate flux density-magnetic field intensity ( B-H) characteristics of a material used in a laboratory-sized salient pole synchronous machine (SPSM). The objective is achieved by distributing the magnetic field intensity H in the different parts of an SPSM using finite-element (FE) simulations and theoretical calculations based on the open circuit characteristics of an actual SPSM. This method requires only an initial estimate of the B -H characteristics of core material. The advantage of the method proposed is it can be used to estimate the magnetic properties of material that might have changed with long usage and aging. Theoretical calculations complimented with FE simulation and comprehensive experimental results prove the effectiveness of this new method.