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A 500V shunt dc motor has a nominal armature current of 40A, and operates at 1200 rpm. if the armature resistance is 0.25 (ohm), calculate:
1. The counter emf
2. The power loss
3. The developed torque.
4. The starting current, if the motor is directly connected to the 500V supply
5. The valve of a starting resistor limiting the initial armature current to 60A
Using SR Flip-flops and NAND gates, design a system that outputs 1 if it takes an even number of clock cycles to recognize the pattern 11-0-101. Otherwise it outputs 0.
Find the minimum Sum-of-Products (SOP) expression for the following function using Quine.
A motor operated from a 480 V(rms), 60 Hz source has an output of 800 hp. The motor is 89% efficient and has a power factor of 69.5% lagging. What is the electrical input power in watts of the motor
A bowling ball is placed on a coil spring. The spring constant is 400N/m. When the bowling ball is placed on the spring, the spring compresses down 0.1m. If the spring is vertical how far will the bowling ball go
Locate and specify an appropriate sensor if it is to operate at 120 vac as an input to a PLC. Create the ladder diagram program to accomplish the specified control.
1. What are some of the fundamental differences between ladder logic programs and relay logic diagrams 2. What are the advantages and disadvantages of a PLC simulation software with virtual input
A serial input finite state machine has one input and one output. The output becomes 1 and remains 1 thereafter when at least two 0's and at least two 1's have occurred as inputs, regardless of the order of occurrence. Draw a state diagram for the..
Let f(a,b) = b' + a. (a) Derive the truth table for f. (b) What is the canonical sum-of-products expression for f? Do not use the shorthand notation. (c) Prove by Boolean algebra that the original expression is the same as the canonical SOP expres..
The woofer can be modeled as a series R-L low pass filter. Suppose that a given woofer has an inductance of 750 micron Hertz and a resistance of 4 Ohms. At what frequncy (in Hertz) does its frequncy response
Consider a series RLC circuit disconnected from a source at t=0. The circuit components are R=3 ohms, C = 500 F, and L = 1 H. We assume that Vc(0-) = 20 V and i(0-) = -0A. a) Find the natural reponse i(t) for t > 0.
where the assigned loop current leaves the voltage source. If current leaves the voltage source at its positive terminal, the voltage would be positive and if it leaves the voltage source at its negative terminal,the voltage would be negative.
Compute the rectangular form of the four-point DFT of the following signal, which is zero for n =4. Compute the inverse DTFT of: X(ω)=sinΩ cosΩ
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