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The speed of a separately excited DC motor is controlled by asingle-phase semiconverter . The field current, which is alsocontrolled by a semiconverter, is set to the maximum possiblevalue. The AC supply voltage to the armature and field convertersis one phase, 208 V, 60 Hz. The armature resistance is 0.25Ω, the field resistance is 147 Ω, and the motor voltageconstant Kv is 0.7032 V/A rad/s. The load torque is 45Nm at 1000 RPM. The viscous friction and no-load losses arenegligible. The inductances of the armature and field circuits aresufficient enough to make the field and armature currentscontinuous and ripple free. Determine:a. The field current.b. The delay angle of the converter in the armature circuit
Given a DSP system in which a sampling rate of 8000 Hertz is used and the antialiasing filter is a second order Butterworth low pass filter with a cutoff frequency of 3.2 KHz determine a. The percentage of aliasing level at cutoff frequency
two loads connected in parallel are supplied from a single phase 240v rms source. the two loads draw a total real power of 400 kw at a power factor of 0.8 lagging. one of the loads draws 120 kw at a power factor of 0.96 leading.
Indicate the use of each memory in the microcontroller (HCS12). In other words, state which one is used for code, program variables, and variables that must remain when the power is turned off.
A shunt DC motor has RA = 0.7-ohm and VT =429.6 V. For an output power of 50.4 hp, we have nm = 1,452 rpm and IA = 110.8 A. The field current remains constant for all parts of this problem. Find the rotational power loss in watts.
An analog LTIC system with impulse response function h(t) = u(t+1)-u(t-2) is presented with an input x(t) = t(u(t) - u(t-2)). (a). Determine and plot the system output y(t) = x(t)*h(t)
The switch in the circuit has been in position a for a long time. At t=0 the switch is moved to position b. A.Calculate the initial voltage on the capacitor if v = 200V , and i = 1.9mA.
from the following data: 6.28 7.06 6.50 6.76 6.82 6.92 6.86 7.15 6.57 6.48 6.64 6.94 6.49 7.14 7.16 7.10 7.08 6.48 6.40 6.54 A. find the mean and the median B. Find the variance and standard deviation
Draw the state diagram for a sequence that detects the sequence 0101 using a minimal number of states. The detector should also detect overlapping sequences. Design the circuit using D flip-flops. Draw the logic diagram.
Write and test an assembly language program that solves the following straight-line equation for y. Generate an integer result as close as possible to the actual answer. Assume variable x is always positive and x is an 8 bit number.
Assuming DS = 1200H, BX = 0100H, and SI = 0250H, determine the address accessed by each of the following instructions. Assume real mode operation. (a) MOV [100H], DL (b) MOV [SI+100H], EAX
A 1 F capacitor is being charged through a 100 Ohm resistor. How long will it approximately take for the capacitor to reach about 63% of its final charge
Write a program to create an array initialized with Hex digits in the ROM space. The main code should copy this array to a different array in the RAM space.
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