Design Considerations for the Use of Aluminum Alloys for Integral Horsepower Motors

The design considerations on the use of aluminum alloys for the external supporting parts of integral horsepower induction motors are compared with the previously conventional use of cast iron. Covered are such factors as type of aluminum alloy selected considering service requirements and manufacturing methods planned, strength, reliability, durability (including corrosion resistance), effect on overall weight and performance. The tests made to check suitability of actual results against design plans are briefly described. In addition, the considerations and tests required to use aluminum windings alternatively with copper are discussed.