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  • 7/31/2019 Cs Mannual Final

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    DEPARTMENT OF ELECTRICAL ENGINEERING VITH

    SEM B.E.ELECTRICAL

    G.H.RAISONI COLLEGE OF ENGINEERING, NAGPUR 1

    G.H.RAISONI COLLEGE OF ENGINEERING, NAGPUR

    DEPARTMENT OF ELECTRICAL ENGINEERING

    Control System Engineering Lab

    INDEX

    Sr.

    No

    Name of Experiment Page

    No.

    1 To study Synchro Transmitter 2

    2 To study Synchro Transmitter and Receiver in pair 4

    3 To plot speed torque characteristics & speed Vs back emf characteristicsof A.C servomotor.

    6

    4 To measure basic step angle of Stepper Motor 9

    5 To study potentiometer as a transducer and error detector. 11

    6 To study the time response of simulated Linear Systems Simulator 13

    7 To plot Root locus by Using MATLAB Software 16

    8 To study transient response of second order system using R, L, C series

    circuit.

    17

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    DEPARTMENT OF ELECTRICAL ENGINEERING VITH

    SEM B.E.ELECTRICAL

    G.H.RAISONI COLLEGE OF ENGINEERING, NAGPUR 2

    EXPERIMENT NO: 1

    AIM: -To study Synchro Transmitter

    APPARATUS: - 1) Synchro2) Multimeter

    CIRCUIT DIAGRAM: -

    S2

    R1

    V

    V/2V/2

    STATOR

    WINDING OF

    TRANSMITTER

    AC LINE

    ROTOR

    WINDING OF

    TRANSMITTER

    S1 S3

    R2

    TORQUE TRANSMISSION USING SYNCHRO TRANMITTER

    V23

    V12

    V31

    THEORY:- Theory should cover details about following points.

    1 Constructional details of Synchro Transmitter2 Constructional details of Synchro Receiver3 Operation of Synchro Transmitter Receiver in pairs.4 Advantages and disadvantages of Synchro.5 Application of Synchro.

    PROCEDURE: -

    1) Connect the system to main supply2) Switch on the main switch and SW13) Do not connect any wires between the stator winding of TX & TR.4) Starting from zero position (i.e. Knob of synchro transmitter at 0 degree) note- down

    the voltages between stator terminals i.e. VS S1 , VS2S3 , & VS3 S4 in a sequential

    fashion .5) Rotate the knob by 30 degree and again note down Vs1S2 , VS2S3 & VS3 S16) Repeat step no.05 for further rotation by 30 degree (i.e. knob at 60 degree now)

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    DEPARTMENT OF ELECTRICAL ENGINEERING VITH

    SEM B.E.ELECTRICAL

    G.H.RAISONI COLLEGE OF ENGINEERING, NAGPUR 3

    7) Like this make one complete rotation of 36 degree and note the readings in a tabularform.

    OBSERVATION TABLE: -

    Sr. No Position of

    Rotor inDegrees

    Stator Voltage or terminal voltage ( RMS value )

    1 0 degree Vs1S2 VS2S3 VS3S1

    2 30 degree

    3 60 degree

    4 .

    5 .

    6 .

    7.

    12 330 degree

    13 360 degree

    GRAPH: - Plot a graph of angular position VS voltage for all the three phases .

    RESULT: -The synchro Transmitter was studied and waveform of stator winding voltages

    was plotted on graph .

    CONCLUSION: - : It is observed that due to transformer action, the angular position of

    rotor is transferred into a unique set of stator voltage, viz. VS1S2 , VS2.S3 & VS2S1.

    VIVA QUESTIONS:

    1) Explain the working of synchro transmitter as transducer?2) Write application of synchro transmitter as transducer?

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    DEPARTMENT OF ELECTRICAL ENGINEERING VITH

    SEM B.E.ELECTRICAL

    G.H.RAISONI COLLEGE OF ENGINEERING, NAGPUR 4

    EXPERIMENT NO: 2

    AIM: -To study Synchro Transmitter and Receiver in pair.

    APPARATUS: - Synchro Transmitter & Receiver Kit

    CIRCUIT DIAGRAM :-S2 S2

    V

    V/2V/2

    R1 R1

    V

    V/2V/2

    STATOR

    WINDING OF

    TRANSMITTER

    STATOR

    WINDING OF

    RECEIVER

    AC LINE

    ROTOR

    WINDING OF

    TRANSMITTER

    ROTOR WINDING

    OF RECEIVER

    S1 S3S1 S3

    R2 R2

    TORQUE TRANSMISSION USING SYNCHRO TRANMITTER

    S2 S2

    0

    3V/2

    3V/20

    STATOR

    WINDING OF

    TRANSMITTER

    STATOR

    WINDING OF

    RECEIVER

    AC LINE

    ROTOR

    WINDING OF

    TRANSMITTER

    ROTOR WINDING

    OF RECEIVER

    S1 S3S1 S3

    R2 R2

    TORQUE TRANSMISSION USING SYNCHRO

    TRANMITTER AND RECEIVER AS PAIR

    3V/2

    3V/2

    30

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    DEPARTMENT OF ELECTRICAL ENGINEERING VITH

    SEM B.E.ELECTRICAL

    G.H.RAISONI COLLEGE OF ENGINEERING, NAGPUR 5

    THEORY: -Theory should cover details about following points.

    2. Constructional details of Synchro Transmitter3. Constructional details of Synchro Receiver4. Operation of synchro transmitter receiver in pair.5.

    Advantages and disadvantages of synchro.6. Application of synchro.

    PROCEDURE: -1) Connect the system to main supply2) With the help of patch cord establish connections between corresponding terminals of

    TX & TR stators. i.e. connect S1 to S1 , S2to S2 and S3 to S3 of TX & TR statorrespectively .

    3) Switch on SW1 & SW2 as well as main of instrument.4) Move the pointer (rotor position of TX in steps of 30 degrees and observe the new

    position of TR.

    5)

    Enter the input angular position & output angular position in the tabulator from &plot the graph.

    OBSERAVTION TABLE: -

    Sr. No

    Synchro Transmitter Synchro Receiver

    1. 0

    2. 30

    .

    .

    . 33012. 360 = 0 degree

    13.

    GRAPH: - Plot the graph between O/P angular position ( Receiver side ) Vs input

    angular position ( Transmitter side )

    RESULT: - The Synchro Transmitter Receiver in pair or as an error detector was studied

    .

    CONCLUSION:-

    VIVA QUESTIONS:1) Compare the constructional difference between the synchro

    transmitter and synchro-receiver?

    2) Write the application of the synchro transmitter and synchro-receiveras pair?

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    DEPARTMENT OF ELECTRICAL ENGINEERING VITH

    SEM B.E.ELECTRICAL

    G.H.RAISONI COLLEGE OF ENGINEERING, NAGPUR 6

    EXPERIMENT NO: 3

    AIM: - To plot speed torque characteristics & speed Vs back emf characteristics of

    A.C servomotor .

    APPARATUS: -

    1) AC Servomotor set2) Multimeter

    CIRCUIT DIAGRAM: -

    110V

    0V

    M2

    RECTIFIER AND

    REGULATOR

    PCB 1 -- PCB3

    ETP3

    -

    +

    LIGHT

    SOURCE

    PHOTO

    PICKUP

    ROTATING

    DISC

    TP2

    TO

    LAMP

    Eb

    TP1

    - +

    SIGNAL

    PROCESSINGPCB2

    M1

    RPM

    SPEED

    CALIBERATION

    10K /8W

    C /1mfd

    P1A.C.

    230V

    ACSM

    REF. WINDING

    DCM

    P2

    VR

    (TP2)

    LOAD

    CONTROL

    BLOCK DIAGRAM OF AC SERVOMOTOR

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    DEPARTMENT OF ELECTRICAL ENGINEERING VITH

    SEM B.E.ELECTRICAL

    G.H.RAISONI COLLEGE OF ENGINEERING, NAGPUR 7

    THEORY: - Theory should cover details about following points

    1) Description of set up.2) What is Servomotor? Give their classification in brief?3) The requirements or desirable features of servomotors.4) Constructional details of AC Servomotors.5) Working6)

    Point of differences between AC servomotor & normal Induction Motor.7) Application

    PROCEDURE: -1) Study all the controls carefully on the front panel. Keep the switch SW1,

    in upward position, indicating that the armature circuit of dc. Machine is

    not connected o Auxiliary power supply, switch SW2 should also be inoff position.

    2) Ensure P1 & p2 are in fully anticlockwise position.

    3) Note switch ON SW1 & also switch SW2, you can observe that ACservomotor will start rotating & the speed will be Indicated by the meter M1on the front panel .

    4) Also SW3 in OFF condition, vary the speed of by moving P1 in a clockwise

    direction and note the emf. gnerated by the D.C. machine ( now working as adc generator or tacho) At terminal Tp1 . Enter the results in Table no-01 (

    Use a DC voltmeter in the range of 0-to 2 volt or so .)

    5) Now switch SW3 , in off condition , switch ON SW2 and keep the pot , P1

    in minimum position / You can observe that the AC servomotor starts

    moving with speed being indicated by the RPM indicator . You can measurethe reference winding voltage (which is variable by pot P1)

    6) Set the control winding voltage to 35 volt and the note the speed of A.C.

    Servomotor by controlling Pot P2 in a slow fashion. Note down corresponding

    values of Ia & on meter M2 & RPM meter M1 respectively. Enter these valuesin Table 2.

    8) Now switch off SW3 & set the control wining voltages to 45 volt & 55 voltrespectively & repeat the procedure as in step 5 .

    9) Polt the speed torque characteristics for various values of control windingvoltage.

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    DEPARTMENT OF ELECTRICAL ENGINEERING VITH

    SEM B.E.ELECTRICAL

    G.H.RAISONI COLLEGE OF ENGINEERING, NAGPUR 8

    OBSERVATION TABLE : -

    TABLE NO:- 01(Table indicates only procedure)

    Sr.No N

    (in RPM )

    Eb ( in volt)

    1 1175 -1.35

    2 1125 -1.31

    3 1100 -1.26

    4 -- --

    5 -- --

    6 -- --

    - -- --

    TABLE NO:- 02(Table indicates only procedure )

    Control winding voltage = Vc = 35 volt .

    Sr.No I

    (in MA)

    Speed N

    ( in PM )

    Eb

    ( in volts )

    Pmw = ( Eb ) .(Ia)

    ( in mill watt)

    Torque in

    (gm-cm)

    1 0 1475 1.47 0 0

    2 200 1400 1.4 280 19.46

    3 300 1350 1.35 405 29.19

    4 -- -- -- -- --

    . -- -- -- -- --

    . --- --- --- --- ---

    NOTE: - Torque T= ( P* 1.019* 104 *60 / 2N gm = Cm

    GRAPH: - 1) Plot a graph for back e.m.f. ( in mV) Vs speed in RPM

    2) Torque -speed characteristics of AC servomotorRESULT: - Torque speed characteristics for AC servomotor & back e.m.f. Vs speed

    characteristics was studied and graph are plotted.

    CONCLUSION: -Note the readings in a tabular form.

    VIVA QUESTIONS: -1) What is Servomotor? Give their classification in brief2) Explain the torque speed characteristics of AC servomotor?

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    DEPARTMENT OF ELECTRICAL ENGINEERING VITH

    SEM B.E.ELECTRICAL

    G.H.RAISONI COLLEGE OF ENGINEERING, NAGPUR 9

    EXPERIMENT NO: 4

    AIM: -To measure basic step angle of Stepper Motor

    APPARATUS: - Stepper motor set up.

    CIRCUIT DIAGRAM: -

    PULSE

    SEQUENCE

    GENERATOR

    uPINTERFACE

    1

    2

    3

    4

    POWER

    DRIVER

    Y TRIG

    SINGLE STEP

    CW CCW

    PHASE

    FREE

    RUN WOBLE

    FREQ

    STEPPER MOTOR

    PANEL DRAWING

    ON

    THEORY: - Theory should cover details about the following points .

    1 Equipment description.3) Construction of stepper motor4) Working5) Application

    PROCEDURE: -

    1) Connect the motor unit to main unit & switch on the supply2) Keep switch S1 to manual stepping.3) Select clockwise (CW) rotation.4) Connect all phases to the corresponding drives.5) Press the manual stepping push button inn multiples of 10 pulses & note the

    change in angular position from the dial

    6) Calculate the average basic step angle.7) Repeat the above step selecting counter clockwise (CCW) directions rotation.

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    DEPARTMENT OF ELECTRICAL ENGINEERING VITH

    SEM B.E.ELECTRICAL

    G.H.RAISONI COLLEGE OF ENGINEERING, NAGPUR 10

    OBSERVATION TABLE:-

    Sr. No Direction of

    Rotation

    Angle

    subtended in 10steps ( indegrees )

    Angle

    subtended inone step ( indegrees)

    Average basic

    step angle ( indegrees)

    1. CW ----- ----- -----

    2. CCw ----- ----- ----

    RESULT:- Basic step angle of stepper motor in found to be .

    CONCLUSION:-

    VIVA QUESTIONS: -1) Explain the different types of stepper motor?2) What is importance of stepper motor as per industrial purpose?3) Write the application of stepper motor?

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    DEPARTMENT OF ELECTRICAL ENGINEERING VITH

    SEM B.E.ELECTRICAL

    G.H.RAISONI COLLEGE OF ENGINEERING, NAGPUR 11

    EXPERIMENT NO: 5

    AIM: -To study potentiometer as a transducer and error detector.

    APPARATUS: - 1) 10 Turn precision helical potentiometer

    2) Multimeter

    CIRCUIT DIAGRAM: -

    2.21 VOLTS

    POTENTIOMETRIC ERROR DETECTOR

    POT 1 POT 2

    +

    _

    BALANCED

    DEMODULATOR

    AC DC

    EXCITATION

    ON

    +

    _

    INSRUMENTATIONAMPLIFIER

    Vo

    V1 V2

    BALANCED DEMODULATOR

    CARRIER(Internal)

    SCHEMATIC DIAGRAM

    AC / DC

    EXCITATION

    POT 1POT 2

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    DEPARTMENT OF ELECTRICAL ENGINEERING VITH

    SEM B.E.ELECTRICAL

    G.H.RAISONI COLLEGE OF ENGINEERING, NAGPUR 12

    THEORY: - Theory should cover details about following points.

    1) Equipment Description2) Building Blocks3)

    Experimental Work

    PROCEDURE: - 1) Connect the main cord to supply line & switch on the main switch &device button.

    2) Adjust the output voltage of potentiometer to zero by rotating the knob

    of potentiometer in anticlockwise direction. (note that we are using

    only one side i.e. one potentiometer).3) Measure the input voltage between I/P and ground.

    4) Now rotate potentiometer knob by one rotation i.e. 3600

    & measure o/p

    voltage between terminals, O/P & ground. It will be approximately(1/10)th of I/P voltage (Because the potentiometer on which we are

    working is 10 turn potentiometer) .5) Repeat step no 4 ten times. At the end of tenth rotation O/P voltage isequal to input voltage.

    OBSERVATION TABLE: -

    Sr. No. Angular Position (in

    Degrees)

    Output voltage (in Volts)

    1 100 0

    3600 3.6

    750

    0

    0.721080

    01.08

    GRAPH: - Plot a graph for angular position Vs O/P voltage

    RESULT: - Potentiometer as a transducer was studied & graph is plottedbetween angular position Vs output voltage.

    CONCLUSION: -

    VIVA QUESTIONS: -

    1) Explain the working of potentiometer?2) Write the application of potentiometer?

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    DEPARTMENT OF ELECTRICAL ENGINEERING VITH

    SEM B.E.ELECTRICAL

    G.H.RAISONI COLLEGE OF ENGINEERING, NAGPUR 13

    EXPERIMENT NO: 6

    AIM: - To study the time response of simulated Linear Systems Simulator

    APPARATUS: - Linear System Simulator KIT

    CIRCUIT DIAGRAM: -

    +K1

    -----

    S

    - 1

    K

    Rs Cs

    +

    K3

    ------------

    ST2 + 1K

    -1

    Rs Cs

    CLOSED LOOP OPTION FOR FIRST ORDER

    SYSTEMS

    G(s)

    -

    +

    REFERENCE OR

    COMMAND

    SYSTEM

    MEASUREMENT

    DECISION

    MAKING

    BLOCKED DIAGRAM OF A CLOSED LOOP SYSTEM

    Cs

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    DEPARTMENT OF ELECTRICAL ENGINEERING VITH

    SEM B.E.ELECTRICAL

    G.H.RAISONI COLLEGE OF ENGINEERING, NAGPUR 14

    K

    --

    S

    C(t)

    C(t) = Kt

    t

    Y(t)

    t

    1

    K

    ----------

    ST + 1

    r(t)

    1

    t

    C(t)

    t

    .632K

    K

    T

    C(t) = K(1 - e-t/T)

    UNIT STEP RESPONSE OF FIRST ORDER TRANSFER FUNCTIONS

    THEORY: - Theory should cover details about the following points.1 Equipment description.2 Construction of Linear System Simulator3 Working4 Application

    PROCEDURE: - For Open Loop Response

    1) Note down the value of K1, K2, K3 and T1 , T22) Error detector cum variable gain

    a) Apply a 100 mV square wave signal to any of the three inputsb) Set the gain setting potentiometer to 10.0( v=0)c) Measure the P-P output voltage and note its sign. Calculate the

    gain. This is the maximum value of gain.

    d) Repeats for other two inputs.e) Write the equation of this block and verify by connecting the signal

    to all three inputs.

    3) Disturbance addera) Test it in same manner as a)

    4) Uncommitted amplifiera) Apply a 1 volt p-p square input .b) Measure the p-p output voltage and note its sign.c) Record the equation of this block for later use.

    5) Integratora) Apply a 1 volt p-p square input.b) Measure the p-p output voltage and note its sign.c) Calculate the gain constant K of integrator and write transfer

    function of block.

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    DEPARTMENT OF ELECTRICAL ENGINEERING VITH

    SEM B.E.ELECTRICAL

    G.H.RAISONI COLLEGE OF ENGINEERING, NAGPUR 15

    6) Time constanta) Apply 100mV p-p square wave of known frequency to ensure that

    steady state.

    b)

    Find on the trace the time t= T, where response reaches to 63.2 %.c) K= ( p-p steady state output / p-p input amplitude )d) Write transfer function of block

    First Order System - Closed Loop Response

    b) Apply a 1 volt p-p square input. trace the o/p waveforms , for K=0.5 , 1.0, 1.5 .

    c) Calculate the time constant in each case compare it withtheoretical results.

    d) Calculate steady state errors for the above case .e)

    To find steady state error for ramp input, apply 1V p-p triangularwave input . connect system i/p to X input and output to Y input

    f) The vertical displacement between the two curves is the steadystate error.

    g) Repeat the measurement for different values of K and comparethe results with theoretical values.

    RESULT: - We studied the first order open loop and closed loop system with linear systemsimulator.

    VIVA QUESTIONS: -

    1) Explain the different standard input of control system?2) Explain the effect of feedback element on control system?

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    DEPARTMENT OF ELECTRICAL ENGINEERING VITH

    SEM B.E.ELECTRICAL

    G.H.RAISONI COLLEGE OF ENGINEERING, NAGPUR 16

    EXPERIMENT NO: 7

    AIM: - To plot Root locus by Using MATLAB Software

    Problem: - Sketch the root locus for the transfer function given below.

    10

    G(S) = ---------------------------------------

    S (S+1) (S+2) (S+4)

    THEORY: - Theory should cover the following points .

    1) Explain about MATLAB Software2) Write steps to plot Root Locus3) Advantages of using software for analysis.

    PROCEDURE:- 1) Solve the problem manually

    2)By using MATLAB software feed the data as above problem.

    3) Do the analysis by MATLAB software4) Compare both the result

    RESULT: - Result obtained manually are as results obtained by software .

    By using software we can do analysis of large system.

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    DEPARTMENT OF ELECTRICAL ENGINEERING VITH

    SEM B.E.ELECTRICAL

    G.H.RAISONI COLLEGE OF ENGINEERING, NAGPUR 17

    EXPERIMENT NO: 8

    AIM: - To study transient response of second order system using R, L, C series circuit.

    APPARATUS: -1) Function Generator2) Cathode Ray oscilloscope

    3) Capacitance box4) Resistance box5) Inductance box

    CIRCUIT DIAGRAM: -

    THEORY: - The theory should contain the details about following points .

    1. Definition of Time response , Transient response and steady stateresponse2. Type and order of system.3. Time response specification viz. Delay time ., rise time Peak time ,

    Overshoot , Settling time , steady state error ( write down expressionsfor these specification )

    PROCEDURE: -(1) Connect R, L, C in series and give supply to this series combination

    through function generator . Connect CRO across capacitance box.

    (2) Give a supply of 2 volt ( peak to peak) by function generator .(Measure this on CRO )(3) By varying R, L, C as well as adjusting frequency to a suitable get the

    time response on CRO.(4) Note all the time response specifications and draw the response on graph

    paper.

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    DEPARTMENT OF ELECTRICAL ENGINEERING VITH

    SEM B.E.ELECTRICAL

    G H RAISONI COLLEGE OF ENGINEERING NAGPUR 18

    OBSERVATION TABLE: -

    Input voltage (P-P) =-------------------------- Input frequency: ---------------------------

    Sr.

    No

    R L C tr tp % Mp

    1

    2.

    3.

    SPCIMEN CALCULATION:-

    (1) = R/2 ( C / L)(2) n= 1/ ( l.C)(3)

    tr = -----------------

    n 1- 2(4) % Mp = 100 e - 1- 2

    GRAPH : - Sketch the complete time response on graph paper .

    RESULT: - The time response of second order RLC series circuit was studied and plottedon graph paper.

    VIVA QUESTIONS: -

    1) Explain the steady state and transient response?2) Explain the classification of control system according to the

    damping ratio?