Die-Cast Copper Motor Rotors: Motor Test Results, Copper Compared to Aluminum

Brush, Edwin F.; Cowie, John G.; Peters, D. T.; Son, Darryl J. Van

doi:10.1007/978-3-642-55475-9_21

Cited by 14 publications

(12 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These results generated by motor manufacturers in India on motors where die-cast copper has been simply substituted for the aluminum in the rotor with no design modifications support the conclusions for similar material-substituted motors previously reported [3,4]. In this latest contribution, the several loss components have not been measured and therefore there is less information for the designer in attempting to optimize a motor for the high electrical conductivity of copper.…”

Section: Motor Tests In Indiasupporting

confidence: 85%

Recent Advances in Development of the Die-Cast Copper Rotor Motor

Brush¹,

Peters

Cowie

et al.

Recent Developments of Electrical Drives

View full text Add to dashboard Cite

Abstract. Performance of several motors where 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.

show abstract

Section: Motor Tests In Indiasupporting

confidence: 85%

Recent Advances in Development of the Die-Cast Copper Rotor Motor

Brush¹,

Peters

Cowie

et al.

Recent Developments of Electrical Drives

View full text Add to dashboard Cite

show abstract

“…Another important design parameter of SPIM is the use of aluminum or copper type squirrel cage. The use of copper is disadvantageous in terms of cost and production [19]. Figure 5 shows the designed rotor and squirrel cage structures.…”

Section: B Single Cage and Double Cage Rotor Structurementioning

confidence: 99%

FEM Study of the Effects of Geometric Changes on the Variable Reluctance Shaded-Pole Motors Performance

2017

IJCCIE

View full text Add to dashboard Cite

Abstract-Due to their robustness, operation from a single phase supply and low cost the shaded pole induction motors (SPIM) are widely used in very low power industrial applications and household appliances. Despite all these advantages the nature of their design alleviates some complicated problems in their analysis and limits the efforts devoted to their performance improvement. In this investigation using Finite Elements Method (FEM) an electromagnetic model of a variable air-gap reluctance SPM motor is built and the effect of geometrical variations of the stator and rotor structures on the performance improvement has been studied. To this end the rotor has been designed as single cage and double cage with different geometries and different types of materials. In addition, the stator is arranged with bridge or without bridge and also with the different inter-pole gap in the bridgeless motor. Finally effect of all these geometrical variations on the motor performance have been studied comparatively.

show abstract

“…Reduced Motor Maintenance -In a direct comparison of die cast copper and aluminum rotors [10], copper castings were deemed significantly more consistent in terms of the effects of casting variables on motor performance. Th.fl conclusion was that the copper die casting process IS very robust and process variations within the range tested had no predictable effect on final performance.…”

Section: A Copper Rotor Benefitsmentioning

confidence: 99%

Copper motor rotors: Energy saving efficiency, now also economic feasibility

Thieman¹,

Kamm²,

Jorstad³

2007

2007 Electrical Insulation Conference and Electrical Manufacturing Expo

View full text Add to dashboard Cite

Replacing aluminum with copper in the die cast squirrel cage conductor bars in electric induction motor rotors has enormous potential benefit in terms of improved efficiency, energy savings, reduced maintenance and reduced weight and cost. Energy savings in the US alone can eventually exceed the output of three to four new 600 megawatt generating plants. The major deterrent to that conversion has been the short tool life associated with casting molten copper. Research sponsored by the Copper Development Association has identified recommended tool materials and casting practices that significantly improve tool life. TBT Presses, Inc. has developed a vertical die casting machine with design features especially suitable for casting motor rotors, and have demonstrated capability to cast a wide range of copper motor sizes on that equipment. They now cast copper-alloy motor rotors for customer evaluation and for limited-volume production runs. THT's Sub Liquidus rheocasting process provides future opportunity for even better tool life when die casting copper alloys.

show abstract

Die-Cast Copper Motor Rotors: Motor Test Results, Copper Compared to Aluminum

Cited by 14 publications

References 2 publications

Recent Advances in Development of the Die-Cast Copper Rotor Motor

Recent Advances in Development of the Die-Cast Copper Rotor Motor

FEM Study of the Effects of Geometric Changes on the Variable Reluctance Shaded-Pole Motors Performance

Copper motor rotors: Energy saving efficiency, now also economic feasibility

Contact Info

Product

Resources

About