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In a proposed design for an electric automobile, the shaft of a four-pole three-phase induction motor is connected directly to the drive axle; in other words, there is no gear train. The outside diameter of the tires is 20 inches. Instead of a transmission, an electronic converter produces variable frequency three-phase ac from a 48-V battery. Assuming negligible slip, find the range of frequencies needed for speeds ranging from 5 to 70 mph. The vehicle, including batteries and occupants, has a mass of 1000 kg. The power efficiency of the dc-to-ac converter is 85 percent, and the power efficiency of the motor is 89 percent. Find the current taken from the battery as a function of time while accelerating from 0 to 40 mph uniformly (i.e., acceleration is constant) in 10 seconds. Neglect wind load and road friction.
Write the VHDL architecture file for a J-K flip-flop that toggles on each falling clock edge. Use J and K for the inputs, Q for the output, and CLK for the clock. All signals are BIT type.
Data at a rate of 2 Mbps is to be transmitted via a pass-band communication system whose carrier frequency is 500MHz. A binary antipodal system with roll-off factor of 0.2 is used for this communication.
A metal plate is subjected to tensile stresses of sigma x = 21 ksi and sigma y = 17 ksi. The corresponding strains measured in the plate are Ex=920 µE and Ey=620µE. Determine Poisson's ration v and the elastic modulus E for the ..
Design a 4-bit register with 2 control inputs s1 and s0; 4data inputs I3,I2,I1 and I0; and 4 data outputs Q3,Q2,Q1 and Q1. When s1s0=00, the register maintain its value. When s1s0=01, the register loads I3...I0. When s1s0=10, the register clears i..
Write a 68000 assembly program to calculate the closest integer cubic root of a 16-bit signed number, saved in memory at a location labeled "NMBR". Obligatory Note: Use the subroutine concept in your solution
you borrowed $10000 from a local bank with the agreement that you will pay back the loan in five years the pay back plan includes two parts: a graduated payment plan with the first payment set at 1500 at year 1 and a gradient of $600 afterward
An 1100 V. 50 Hz star connected induction motor has a starconnected slip-rings rotor with a transformation ratio of 3.0. Therotor resistance per phase is 0.015 ohm and leakage inductance is0.8 mH per phase . Neglect stator impedence .
A particular inverting amplifier with nominal gain of -100 V/V uses an imperfect op amp in conjunction with 100-k-ohm and 10-M-ohm resistors. The output voltage is found to be +9.31 V when measured with the input open and +9.09 V with the input groun..
How much charge is inside this 34.0-cm diameter spherical surface
a.) find the fourier coefficients of the exponential form b.) find the fourier coefficients of the combined trigonometric form c.) plot both the single sided and double sided amplitude and phase spectra
Polyethylene with ?_r = 2.25 is used as the insulating material in a lossless coaxial line with a characteristic impedance of 50 Ω. The radius of the inner conductor is 1.2 mm.
How To Find and Calculate the Number of Fluorescent Lamps in a Sub Circuit?
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