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1. With the aid of diagrams, discuss in detail each of the following elements of electric motor drive systems: four quadrant operation, voltage control, current control, Buck and Boost converters, inverters, cycloconverter, Ward Leonard controller and four sensors used in motor drive control systems.
2. From electrical project work done at the UCBC or at work or as a hobby, or if not, by research, describe, with the aid of diagrams, the electric drive system of your practical or researched system.
There are contacts at the two ends, x=0,W. The contact at x=0 is transparent. Light falls on the contact at x=0 creating electron-hole pairs at a rate GL(x)=GL,0 exp(-x/λ), λ =/= L0. Calculate the steady-state excess electron concentration.
Design and provide the logic circuit of a 4 bit counter using the same techniques used to design synchronous sequential machines.The counter has three inputs: EN (Enable), OD (Order), and ST(Step). The initial output of the FSM is 0000.
A shunt DC generator has a termianl voltage duringopen-circuit of 127V. When the machine is operating at rated load,the rated terminal voltage is 120V. Find the load current ifthe field resistance is 15 ohms and the armature resistance is 0.02ohms..
Show a complete timing diagram for a 3-bit up/down counter that goes through the following sequence: 0, 1, 2, 3, 2, 1, 2, 3, 4, 5, 6, 5, 4, 3, 2, 1, 0. Indicate when the counter is in the UP mode and when it is in the DOWN mode. Assume positive..
implement a high-speed multiplier which will multiply two 2-bit binary numbers b1b0 and c1c0 using a 16x4 prom lookup
the current supplied by a battery slowly decreases as the battery runs down. suppose that the current as a function
A hydroelectric dam has a penstock that discharges 10^5 kg/s of water. The head of the dam is 80m. a. compute the volume of the discharged water per second (flow rate). b. compute the power of the water entering the turbine
1. Compare a script tool such as Matlab to a block tool like Simulink and how you can use them efficiently. 2. Convert the designed prototype filter to highpass filter with cutoff frequency f_C=10,000 Hz.
the circuit arrangements for each of the installations the final circuit cable selection the maximum demand estimation
Given the electric field of a 200 MHz uniform plane wave propagating in the z^ direction, where E is parallel to the y axis and reaches a peak value of 150 (mV/m) at t = 0 (s) and z = 0.5 (m).
Identify the steps involved in the delivery of a letter from the sender to the addressee. How are these steps similar to OSI layers' functions such as addressing, routing, resource sharing, error checking, and connectionless vs. connection-oriente..
A 3-D cubic unit cell contains four atoms whose centers are positional halfway up along each of the vertical cell edges and one atom each centered in the middle of the top and bottom faces. Make a sketch of the unit cell.
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