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Upon the 2005 sale, the company was renamed to Electro-Motive Diesel. EMD's headquarters and engineering facilities are based in McCook, Illinois, [note 1] while its final locomotive assembly line is located in Muncie, Indiana. EMD also operates a traction motor maintenance, rebuild, and overhaul facility in San Luis Potosí, Mexico.
Power was provided by twin 900 hp (670 kW) 12 cylinder Winton 201-A diesel engines in each power unit, exceeding by 50% the most power that could be attained with a single engine at that time. The added "headroom" in power extended the life of mechanical parts, which was a critical issue with early diesel engines in locomotives.
The SP260D is a brushless design producing 261 kW (350 hp), with an inrunner coil. It has a 95% efficiency. It has a 95% efficiency. The low working rpm of the engine means that it can turn a propeller at efficient speeds without the need for a reduction drive .
Type Road number Build year Total produced AAR wheel arrangement Prime mover Power output Image EMC 1800 hp B-B: ATSF 1: 1935 1 B-B+B-B: Dual Winton 12-201-A: 1,800 hp (1,342 kW)
Electric motors have efficiencies ranging from around 15%-20% for shaded pole motors, up to 98% for permanent magnet motors, [101] [102] [103] with efficiency also dependent on load. Peak efficiency is usually at 75% of the rated load. So (as an example) a 10 HP motor is most efficient when driving a load that requires 7.5 HP. [104]
This motor has a smaller footprint compared to the EM61, allowing for 11.7 kg of weight savings in the inverter/motor package. [1] The motor also trades some peak torque for a more efficient power range. [2] It peaks at 250Nm of torque and has a max rpm of 10,500. It is used in the following electric vehicles: Nissan Leaf (AZE0 2013–2017)
There is no defined minimum output, however, it is generally accepted that a motor with a frame size of less than 35mm square can be referred to as a 'micro-motor'. Fractional-horsepower electric motors are exempt from the US Energy Policy Act of 2005 and the new EN 60034-30:2009 [1] ruling of European directive 2005/32/EC [2] concerning the ...
* Note: two versions: one contained a 16-cylinder 7HDL, co-developed by GE and the German firm Deutz-MWM, rated at 6000 HP; the other a 16-cylinder 7FDL rated at 4390 HP. The units equipped with the 7FDL were a sub-version AC6000 "Convertible" and were produced to get the type into operation while the 7HDL was developed.