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A three phase dual converter is used to control the speed of a 75kW, 600V, 1800rpm separately excited dc motor. The dual converter is operated from a three phase, 480V, 60Hz supply and is losslessT. he motor parameteras reR u: 0.1O,L u: 5mH, kO:0.3Vlrpm (Eu: k@n).T he rated armature current is 1304.
a) Using circuit diagrams showing current directions in each mode of operation, describe how a dual converter is operated in the motoring and generating modes.
The current in a circuit element is i(t) = 4 sin 3t A when t ≥ 0 and i(t) = 0 when t Determine the total charge that has entered a circuit element for t ≥ 0.
An input signal of 10V at 0degrees and a frequency of 1592Hz is applied to a series RLC circuit with resistor R=100ohm, inductor L= 40mH, and a capacitor C=0.5uF. The value of the total circuit complex impedance is
For , R1 = 1000 -ohm, R2 = 500 -ohm,R3 = 5000 -ohm, and RL = 2000 -ohm. The source is sinusoidal, vi (t) =120 cos(2-ohm60 t). Using the piece-wise linear model for the diode
For a short transmission line having a series impedance Z=R+jXL, write the relationships between the sending-end and the receiving-end voltages and currents. Assuming a line with R=0, XL=20 ohm feeding a 1MW load at 0.95 power factor
Using 1.5v batteries, a switch, and 3 lamps, device a circuit to apply 4.5v across one lamp, two lamps in series, or three lamps in seris with a single control switch. Draw the schematic.
Using the wiring diagram shown in (Figure 1) , calculate the total power for the three radiators.
Write a 68000 assembly language subroutine, ROTMEM, which rotates the elements (words-size) of an array stored at location point to by (A0). The depth of the array is stored as the first element.
A circuit contains two devices that are connected in parallel. If the resistances of one of these devices is 12ohms and the resistance
A continuous-time (CT) function is non-zero over a range of its argument from 0 to 4. It is convolved with a function which is non-zero over a range of its argument from -3 to -1. What is the non-zero range of the convolution of the two
A 120 V(rms), variable frequency source is connected in series witha 100 ohm resistor and a 100uF capacitor . Find the input power to the cirtcuit from the source at th frequency where the power factorof the load is 0.75
Electric field due to planar charge density. An infinite plane, charged with a uni form surface charge density ρo is immersed in a dielectric of permittivity e. Calculate the electric field intensity everywhere in space.
A transmission line segment with Zo=50 Ohms and of length l is terminated at a load resistance of RL that can be varied. Sketch the input impedance Zin as a function of RL if l=(wavelength/4)
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