Pre-Lab Reading The block diagram of the closed-loop system for control of motor position is shown in the figure. Motor 1 Iy=e 1 PID S+ DC Motor PID position control closed-loop block diagram with set point weight bsp 1 The two-degree of freedom PID compensator with set point weighting is u) ( () y(t)) + r(T)y(T) dtk (t) 6.4.1] sd 41-. ..

10. If only P-mode control is used in a closed-loop control system, the proportional control will cause the system to have smaller steady-state error ess. function (a) p = 50 + 2ep (b) p = 50+ 12ep

Calculate Q2 PART A B AND C

The following information is given for a 300kW, 600V, long shunt compound DC generat or, shunt field resistance is 75 ohms, armature resistance 0.01, brush resistance is 0.011 ohrms, series field resistance is 0.012 ohms and the divert or resistance of 0.036 ohms.When the machine is delivering full load; a. Draw the circuit diagrarn b. Calculate the voltage and C Power generated by the armat ure.

A d.c. shunt machine generates 250-V on open circuit at 1000 r.p.m. Effective armature resistance is 0.5 ohm, field resistance is 250 ohm, input to machine running as a motor on no load is 4 A at 250 V. Calculate speed of machine as a motor taking 40 A at 250 V. Armature reaction weakens field by 4%

The figure below shows a stepper motor. Determine the step angle for Full and Half stepping operation: Phase 4 N Phase 3 N pole S pole H Phase 1 S N Rotor Phase 2 This portion of the exercise you need not submit for this assignment. But educating yourself with this might help in the 3rd exam. Assuming, a logic-1 power (signal) to a phase produces South pole on the stator facing the rotor, give the powering sequence of the stator windings for one full rotation of the rotor in Full and Half step modes.

I want to represent each point on the graph paper with its corresponding scale written alongside it.

Q4/ Chose the correct answer for the following 1. In BLDC motor field winding is kept on a) Stator b) Rotor c) Can be placed anywhere d) Absent 2. By electronic circuitry BLDC can be controlled for both constant and variable torque operation. a) True b) False 3. In medical fields which DC motor is widely used? a) PMDC b) BLDC 4. Construction of BLDC is exactly similar to the a) Conventional DC motor c) Permanent magnet synchronous motor b) Induction motor 5. Typical brushless motor doesn't have a) Commutator b) Permanent magnet 6. The sensor most commonly used in the BLDC motor is a) Thermo Sensor b) Relay Sensor c) Brushed DC motor d) Cannot be determined d) Totally different construction c) Electronic controller d) Fixed armature c) Hall Sensor d) Power Sensor

Two gen. A and B operate in parallel. The station capacity of A is 50MW and that of B is 25MW. The full load speed regulation of station A is 3% and of B is 3.5%. Find the load sharing of 50MW between both the machine and the no load frequency is 50Hz. Don't use pen and copy.

Exercise 2 A shunt generator delivers 14A at 270V and the resistance of the shunt field and armature are 100 Q and 0.75 Q2, respectively. Calculate: i. The generated emf and the efficiency of this operating condition. ii. The generated emf if the shunt field impedance was triple and if it was double and the efficiency of these cases. iii. What emf could serve tha same active power of load but at load voltage of 240V and the efficiency in this case.