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The ALCO RS-11 is a class of diesel-electric locomotive rated at 1,800 hp (1.34 MW), that rode on two-axle trucks, having a B-B wheel arrangement. This model was built by both Alco (327 units) and Montreal Locomotive Works (99 units).
Now, if this motor is fed with current of 2 A and assuming that back-EMF is exactly 2 V, it is rotating at 7200 rpm and the mechanical power is 4 W, and the force on rotor is = N or 0.0053 N. The torque on shaft is 0.0053 N⋅m at 2 A because of the assumed radius of the rotor (exactly 1 m).
Superconducting electric machines typically have the following advantages: Reduced resistive losses but only in the rotor electromagnet. Reduced size and weight per power capacity without considering the refrigeration equipment. There are also the following disadvantages: The cost, size, weight, and complications of the cooling system.
The ALCO RS-3 is a 1,600 hp (1.2 MW), B-B diesel-electric locomotive manufactured from May 1950 to August 1956 by American Locomotive Company (ALCO) and its subsidiary Montreal Locomotive Works (MLW).
For electrical motors, a similar kind of information is conveyed by the service factor, which is a multiplier that, when applied to the rated output power, gives the power level a motor can sustain for shorter periods of time. The service factor is typically in the 1.15-1.4 range, with the figure being lower for higher-power motors.
The most successful Type 1 locomotive was the larger, heavier and more powerful English Electric Type 1, [8] which, as of 2024, still has some members in service 60 years later. In these the cab is at one end with a long, high engine bonnet and the longer body, both overall and ahead of the cab, meant that good driver vision could only be ...
However it complicates the electrical design, because a switching system must deliver power to the different windings and limit torque ripple. [1] [2] Sources disagree on whether it is a type of stepper motor. [3] The simplest SRM has the lowest construction cost of any electric motor. Industrial motors may have some cost reduction due to the ...
When the machine or motor is used as a motor, this EMF opposes the armature current, and the armature converts electrical power to mechanical power in the form of torque, and transfers it via the shaft. When the machine is used as a generator, the armature EMF drives the armature current, and the shaft's movement is converted to electrical power.