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A 6 pole, 60 hz induction motor is wye connected and has a rated slip of .03 with the follwoing parameters: Rs=0.5 ohms, Rr'=0.3ohms, Xs=J1 ohms, Xr'=J0.35 ohms, Xm=j20 ohmsand the total rotational losses=7300 watts. the motor runs from a 4160volt 3 phase line, line current = 237.59 @ -31.08 degress PF=.86 lagging, Sin=1.712 MVA, Qin=884 Kvars, RPI total=1.39Mw, RPD=1.35MW, pout=1.34MW, hp= 1.8*10^6, rpm=1200 efficiency= 91% and torque= 7.86*10^6 ft-lb at rated speed.
on the same 4160/2405 volt transformer secondary there are 4 induction motors. each one is rated at 5,000 hp with 90% efficiency and lagging power Factor of 0.8. also on the circuit is an induction motor rated at 3.53MW at power factor = .7 lagging.Find: a) the total secondary current and power factor.b) repeat if one of the induction motors is replaced with a 5000 HP synchronous motor with the same efficiency but with a Power Factor =0.8 leading.
Sketch the Bode plot (closed-loop gain vs. frequency, and closed-loop phase vs. frequency) of the amplifier. Label the gains at 0.1*f3dB, f3dB, and 10*f3dB using dB-scale. Also indicate the values of the phases at these frequencies.
A certain mixer is producing the following frequencies: 900 kHz, 700 kHz, 500 kHz, and 200 kHz. What are the two most likely input frequencies?
In a typical AC circuit, the supply voltage is 10 VPK and frequency is 60 Hz. If the current through the system is 2 APK with a phase angle of 60o, then the power dissipated by the source is
Two coupled coils have self-inductances L1 = 50 mH and L2 = 200 mH, and a coefficient of coupling k = 0.5. If coil 2 has 1000 turns, and I1 = 5Sin (400t) (i.e. the phasor current is 5? -90° A). Find the voltage at coil 2 and the flux through coil ..
b) What are the equilibrium electron and hole concentrations at 300K and 500K (hint: You will have to find Nc and Nv at 500K, but it isnt necessary for 300K) c) Why does the mobile carrier concentration increase at high temperatures
A piston-cylinder device contains carbon dioxide CO2 (molar mass = 46 g/mol) as shown in the figure. The cross-section area of the piston is 0.25 m2 and the initial cylinder height is 50 cm. CO2 is initially at 40 bar and 500 oC (state 1).
Electrical wiring: Potentials of neutral and earth wires, Why is the neutral wire in housing circuits also at zero potential
In a Zigbee network, Coordinators and Routers can't "sleep", i.e. enter a low-power, inactive mode. Why is this What implications are there because of this on the structure and applications of a Zigbee network
2. Compute the symbol error probability for both constellations in terms of the Gaussian error integral Q(x). 3. Compute the bit error probability for both constellations in terms of the Gaussian error integral.
Determine the requirements of the digital fiters needed and design and write the di erence equations for the digital fiters.
Write a brief explanation of the principles of the super-heterodyne receiver. It may help to use a simple block diagram to express the process. Explain the purpose of the Intermediate Frequency amplifiers,
In a balanced three-phase wye-wye system, the load impedance is 10 +j1 Ohms. The source has phase sequence abc and the line voltage Vab = 220 Vrms /30°. The load voltage is VAN = 120 Vrms /0°.
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