Part II-field modeling and thermal modeling of magnetizing fixture

This paper describes the field modeling and thermal modeling for a magnetizing fixture. As the detailed characteristics of a magnetizing fixture can be obtained, the efficient design of a magnetizer which produces the desired magnet is possible using this modeling. For field modeling, finite-element analysis (using the MAXWELL two-dimensional field simulator) is used as part of the design and analysis process for the magnetizing fixture. The thermal modeling method of the magnetizing fixture resistor uses a multi-lumped model with equivalent thermal resistance and thermal capacitance. The reliable results are obtained by using an iron core fixture (stator magnet of automotive air-cleaner DC motor) coupled to a middle-voltage magnetizer (charging voltage: 1200 V, capacitor bank: 4000 μF)