Two frequently development ways of the induction ... - Kienle + Spiess

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eliability and gives longer motor life [1]. Although copper is ready for high pressure die casting, but it is enormously difficult to cast since its density, viscosity and high melting point. Figure 5. Overall losses of aluminium and copper motors with similar power [1] Figure 6. The expected maximal porosity of the copper end ring [2] On the basis of different tests [2] the expected porosity of copper products in the end rings is around 4 % (Figure 6.). This value of aluminium rotors is less than 1 %. Since casting difficulties, copper rotors have a smooth end ring, therefore there are no balancing lugs or fans. Because of the high copper density, the end ring porosity occurs difficulties by the balancing. Due to the Kienle-Spiess innovation, it was possible to decrease radically the end ring porosity at the copper product as well. Figure 7. The maximal porosity of the copper end ring cast by Kienle + Spiess is around or less than 1 % [1] C. Stark, J. G. Cowie, D. T. Peters, E. F. Brush, Jr., „Copper in the Rotor for Lighter, Longer Lasting Motors“, ASNE San Diego Section Fleet Maintenance Symposium 2005, 30 Aug.-1 Sept. 2005 4 th International Conference on Magnetism and Metallurgy, WMM’10, June 9 th to 11 th 2010 p.387
[2] E. F. Brush Jr, S. P. Midson, W. G. Walkington, D. T. Peters, J. G. Cowie, “Porosity Control in Copper Rotor Die Castings”, NADCA Indianapolis Convention Center, Indianapolis, IN September 15-18, 2003, T03-046 Presentation Company Kienle + Spiess One of the leading manufacturer of punched lamination and die-cast rotors Revenue 2008: 219 Mio. EUR Employees: 1’150 Manufacturing sides: Kienle + Spiess GmbH, Sachsenheim, Germany Kienle + Spiess GmbH, Vaihingen/ Enz, Germany Kienle + Spiess Kft, Tokod, Hungary Kienle + Spiess UK, Bilston, Great Britain Production Area: 45’000 sqm Steel consumption: 100’000 t Our products LAMINATIONS PACKS ACCESSORIES Main areas of expertise: Laser cutting/ prototypes/ Sample pressing Stamping: Blank & Notch/ Segment Dies/ Progressive Dies Assembling: Interlocking/ / Riveting/ Welding/ Bonding/ Cleating Die-casting: Aluminium/ Aloys/ Copper 4 th International Conference on Magnetism and Metallurgy, WMM’10, June 9 th to 11 th 2010 p.387
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