Low-cost stator material for M734 alternators

Silicon steels costing only $0.50 per pound were studied as substitutes for Permalloy used to fabricate two-piece stators for air driven alternators used to power the fuze electronics and to furnish a mechanical arming signature. Nickel-coated M-36 silicon electrical steel is a suitable substitute for the Permalloy which costs $6.00 per pound. However, differences in stamping and drawing properties from those of Permalloy affect the end-plate and housing contact surface and the ability to draw the cup that contains the bearing. Production dies must be developed that allow for the stamping and drawing properties of the electrical steel.