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-. ..

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

The p.u parameters for a 500 MVA machine on its own base are: inertia,M=20 p.u.;Reactance X=2 p.u. What is the p.u value of inertia and reactance on 100 MVA COMMON BASE.  Ans is 100,0.4

Design a LabVIEW program that sweep Servo motor from 0 degrees to the specified angle and repeat Design a LabVIEW program to demonstrate a 28BYJ-48 stepper motor operating in both directions: 5 seconds anticlockwise and 5 seconds clockwise

electrical machines

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Q6 a d.c. shunt machine while running as generator develops a voltage 250 V at 100 r.p.m. at no-load. It has armature resistance of 0.5 2 and field resistance of 250 2. When the machine runs as a motor, input to it at no-load is 4 A, 250 V. calculate the speed and efficiency of the machine when it runs as a motor taking 40 A at 250 V. Armature reaction weakens the field by 4 %.