Abstract
Performance of several motorswhere copper has been substituted for aluminum in the rotor squirrel cage is reported. Copper rotor motors die cast in India for agri-pumping were dynamometer and field tested. Copper rotors resulted in higher electrical energy efficiency, slightly higher rotational speed, lower operating temperature, and higher pumping rates and volume pumped per unit of input energy. SEW-Eurodrive motors with copper rotors are also described. A 1.1 kW motor with copper simply substituted and a 5.5 kW motor with redesigned rotor and stator are described. The copper rotor reduced losses in all major categories. Full-load efficiency was increased 6.7 and 3.1 percentage points, respectively. Finally, a study to minimize formation of large pores in die-cast rotors is summarized.
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References
D.T. Peters, J.G. Cowie, E.F. Brush Jr., S.P. Midson, “Advances in Pressure Die Casting of Electrical Grade Copper”, Amer. Foundry Society Congress Paper No. 02-002, Kansas City, MO, 2002.
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E.F. Brush Jr., J.G. Cowie, D.T. Peters, D.J. Van Son, “Die-Cast Copper Motor Rotors: Motor Test Results, Copper Compared to Aluminum”, Trans. of the Third International Conference on Energy Efficiency in Motor Driven Systems (EEMODS), Treviso, Italy, September 2002, pp. 136–143.
D.T. Peters, S.P. Midson, W.G. Walkington, E.F. Brush Jr., J.G. Cowie, “Porosity Control in Copper Rotor Die Castings”, Trans. of the North Amer. Die Casting Assoc. Congress, Indianapolis, IN, 2003.
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Brush Jr., E., Peters, D., Cowie, J., Doppelbauer, M., Kimmich, R. (2006). RECENT ADVANCES IN DEVELOPMENT OF THE DIE-CAST COPPER ROTOR MOTOR. In: Wiak, S., Dems, M., Komęza, K. (eds) Recent Developments of Electrical Drives. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-4535-6_29
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DOI: https://doi.org/10.1007/978-1-4020-4535-6_29
Publisher Name: Springer, Dordrecht
Print ISBN: 978-1-4020-4534-9
Online ISBN: 978-1-4020-4535-6
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