Die-cast copper rotors for improved motor performance

Cowie, John G.; Brender, D.

doi:10.1109/papcon.2003.1216898

Cited by 24 publications

(11 citation statements)

References 2 publications

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“…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: 72%

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

Brush¹,

Peters

Cowie

et al.

Recent Developments of Electrical Drives

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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.

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Section: Motor Tests In Indiasupporting

confidence: 72%

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

Brush¹,

Peters

Cowie

et al.

Recent Developments of Electrical Drives

Self Cite

View full text Add to dashboard Cite

show abstract

“…As demonstrated by many other researchers, the adoption of copper rotors should bring efficiencies to the 94 to 96% range exceeding the requirements of today's premium efficiency motor, nominally 93% [14]. In addition, analyses by motor manufacturers have shown that copper rotors can be employed to reduce overall manufacturing costs at a given efficiency or to reduce motor weight, depending on which attribute the designer chooses to emphasise.…”

Section: Aluminium-and Copper-rotor Seigsmentioning

confidence: 99%

“…The US Department of Energy reports that motors above 1/6 hp use about 60% of all electricity generated in the United States and the medium power motors (1 to 25 hp) are the favoured candidates for conversion to copper rotors [14]. In Canada alone, one percentage increase in the motor electrical energy efficiency would save roughly $200 million and as a result, 0.5 million barrels of oil annually.…”

Section: Aluminium-and Copper-rotor Seigsmentioning

confidence: 99%

Voltage and frequency regulation of aluminium- and copper-rotor SEIGs incorporating proximity effect

Iyer

Kar

2012

International Journal of Environmental Studies

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Self-excited induction generators (SEIGs) will play an important role in off-grid wind power generation. To advance understanding of the significance and prospects of SEIGs, this paper elucidates the significance of incorporating the proximity effect in the conventional model of self-excited induction generators. The researchers offer an analytical model to incorporate the proximity effect in the rectangular rotor bars of the SEIG. The model's accuracy relies on a computer program. The calculated results are experimentally verified in the case of two 7.5 hp aluminium-and copper-rotor SEIGs under open-circuit and static loading conditions, through an exclusive qualitative analysis of terminal voltage build-up at no-load, variation in terminal voltage and frequency, as a function of the proximity effect. The paper examines also the voltage regulation, frequency regulation and excitation capacitance requirements of both aluminium-and copper-rotor SEIGs.

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“…As demonstrated by many other researchers, the adoption of copper rotors should bring efficiencies to the 94 to 96% range exceeding the requirements of today's NEMA premium efficiency motor, nominally 93% [5]. In addition, analyses by motor manufacturers have shown that copper rotors can be employed to reduce overall manufacturing costs at a given efficiency or to reduce motor weight, depending on which attribute the designer chooses to emphasize.…”

Section: Introduction and Background Studiesmentioning

confidence: 99%

Online stator and rotor resistance estimation scheme using swarm intelligence for induction motor drive in EV/HEV

Iyer

Mukherjee

et al. 2011

2011 1st International Electric Drives Production Conference

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The usage of niche copper-rotor induction motor (CRIM) in the Tesla Roadster electric vehicle has bolstered the technology of using copper-rotor induction motor for electrified transportation. Understanding the merits, demerits and state of art technology of induction motor and its drive in EV/HEV application, this research manuscript proposes an online stator and rotor resistance estimation scheme using particle swarm optimization (PSO) technique for efficient and accurate control of induction motors in the same application. Firstly, an insight is provided on the state or art CRIM technology in EV/HEV and the need for reliable online rotor and stator resistance estimation scheme. Secondly, a PSO based scheme for resistance estimation is developed through a mathematical model. The developed model is validated and tested on a 10hp CRIM thorough a computer programme. Thereafter, the calculated results obtained from numerical investigations are analyzed.

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Die-cast copper rotors for improved motor performance

Cited by 24 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

Voltage and frequency regulation of aluminium- and copper-rotor SEIGs incorporating proximity effect

Online stator and rotor resistance estimation scheme using swarm intelligence for induction motor drive in EV/HEV

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