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Consider a three-phase machine with the following parameters: rs = 72.5 m Ω
The load torque varies with the speed cubed, and is such that 50-hp is required to spin the load at 1800 rpm. A balanced three-phase voltage source with a 460-V line-to-line rms amplitude and 60-Hz frequency is applied to the machine. Taking the a-phase voltage to be the zero reference for phase, find the rotor speed, the phasor representation of the a-phase current, the input power, the output power, and the efficiency.
Consider a recalculating flow in the power cycle shown in the figure. The fluid flowing in 100 ft of smooth pipe have an average specific weight of 50 lbf/ft3 and average dynamic viscosity of 5×10-4 lbf.s/ft2. Head loss in the nuclear reactor is 75 f..
atmospheric air at 98 kpa and 30degc flows into an air conditioning system with a volume flow rate of 2 m3min. to
Prepare a report on steering system Steering system Definition
Sketch the configuration of a two-pole, four-stack, variable-reluctance stepper motor with two rotor teeth. Use as, bs, cs, and ds to denote the phase windings. Calculate TP, SL, and give the excitation sequence for ccw rotation.
determine the minimum pump power required to pump water from one reservoir to another at an elevation of 110 m above
Refrigerant 134a at 30 lbf/in.2, 408F enters a compressor operating at steady state with a mass flow rate of 150 lb/h and exits as saturated vapor at 160 lbf/in.2 Heat transfer occurs from the compressor to its surroundings, which are at 408F. Cha..
A wind turbine has a rotor diameter of 60 m. The wind speed is 10 m/s. The power coefficient of the rotor is 0.48 and the efficiency of the drive train is 0.9. The air temperature is 15°C, the air pressure is 101 kPa and the density of the air is 1.2..
finding the time interval for the motorcyclist to reach a given acceleration if the motorcyclist starts from rest
Prepare the statement of financial position
a copper vertical plate that is 0. 305 m tall and 1. 5 m wide separates two large air spaces. the air space at the left
hot gas inside an internal combustion engine of a car expands in a reversible manner during the expansion stroke to
a steam boiler heats liquid water at 200 ordmc to superheated steam at 4 mpa and 400 ordmc. coal fuel from utah which
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