Experiment-1
Performance analysis of 1-ø fully controlled converter fed separately
exited DC motor
AIM:-To control the speed of a separately exited DC motor using 1-ø fully controlled
converter.
APPARATUS:1. Single phase AC supply
2. 230V/115V step down transformer
3. Full bridge rectifier kit
4. Separately excited DC motor
5. Tachometer
6. Multimeter
7. DSO and DSO Probes
8. Connecting wires
CIRCUIT DIAGRAM:-
PROCEDURE:1) Connect the circuit as per the circuit diagram.
2) Firing pulses to the SCR’s are given from firing circuit.
3) By varying the firing angle note down the variation in armature terminal
voltage and speed of the motor.
4) Repeat the above step by varying firing angle from 0˚ to 180˚ and tabulate the
values.
5) Plot the graph from variation of speed of the motor with respect to the firing
angle.
TABULAR COUMN:Armature voltage
Speed
Firing angle
V
N (rpm)
PRECAUTIONS:1) Avoid loose connections.
2) Field winding of the motor should never be open circuited while the motor is in
running condition.
RESULT:-
Experiment-2
Performance analysis of 3-ø semi converter fed separately exited DC
motor
AIM:-To control the speed of a separately excited DC motor using 3-ø semi converter.
APPARATUS:1. Three phase AC supply
2. 440V/115V step down transformer
3. Three phase bridge rectifier kit
4. Separately excited DC motor
5. Tachometer
6. DSO and DSO Probes
7. Connecting wires
CIRCUIT DIAGRAM:-
PROCEDURE:1) Connect the circuit as per the circuit diagram.
2) Firing pulses to the SCR’s are given from firing circuit.
3) By varying the firing angle note down the variation in armature terminal
voltage and speed of the motor.
4) Repeat the above step by varying firing angle and tabulate the values.
5) Plot the graph from variation of speed of the motor with respect to the firing
angle.
TABULAR COUMN:Armature voltage
Speed
Firing angle
V
N (rpm)
PRECAUTIONS:1) Avoid loose connections.
2) Field winding of the motor should never be open circuited while the motor is in
running condition.
RESULT:-
Experiment-3
Speed control Of PMDC motor using dual converter
AIM:-To control the speed of a PMDC motor using dual converter.
APPARATUS:1. Single phase AC supply
2. 230V/12V step down transformer
3. Dual converter kit
4. PMDC motor
5. Tachometer
6. Multimeter
7. DSO and DSO Probes
8. Connecting wires
CIRCUIT DIAGRAM:-
PROCEDURE:1) Connect the circuit as per the circuit diagram.
2) Keep the dual converter in circulating mode of operation.
3) By varying the firing angle through firing circuit note down the speed of the
PMDC motor and the output voltage of the converter.
4) Observe the forward and reverse motoring operation of the motor by varying
the firing angle tabulate the values for each variation.
5) Plot the graph for variation in speed of the motor with respect to firing angle.
TABULAR COLOUMN:Firing angle
Armature voltage
Speed
V
N (rpm)
PRECAUTIONS:1) Avoid loose connections.
2) Proper value of reactor should be chosen to operate dual converter in
circulating mode.
RESULT:-
Experiment-4
Open loop V/F control of 3-ø Induction motor
AIM:-To control the speed of a3-ø Induction motor using V/F control method.
APPARATUS:1. Single phase AC supply
2. 230V/230V Isolation transformer
3. IGBT PWM Inverter kit
4. Three phase induction motor
5. Tachometer
6. Multimeter
7. Connecting wires
CIRCUIT DIAGRAM:-
PROCEDURE:1) Connect the circuit as per the circuit diagram.
2) By keeping the V/F ratio constant vary the voltage (V) and frequency (F).
3) Note down the speed of the motor for each variation and tabulate the values.
4) Plot the graph for variation of speed with respect to voltage and frequency.
TABULAR COUMN:-
Output voltageV (volts)
FrequencyF (Hz)
V/F Ratio
SpeedN (rpm)
PRECAUTIONS:1) Avoid loose connections.
2) Care should be taken while varying the voltage (V) to be within the rated value.
RESULT:-
Experiment-5
Chopper fed control of separately exited DC motor
AIM:-To control the speed of a separately exited DC motor using four quadrant
chopper.
APPARATUS:1. Four quadrant chopper kit
2. 230V/230V Isolation transformer
3. DC separately exited motor
4. Multimeter
5. Filament lamps
6. Tachometer
7. DSO and DSO Probes
8. Connecting wires
CIRCUIT DIAGRAM:-
PROCEDURE:1) Connect the circuit as per the circuit diagram.
2) Initially the voltage across the armature terminals of the motor should be
minimum. And the field winding of the motor should be maximum.
3) To check the above condition connect a filament lamp across the terminals A-AA
which should be in OFF condition and another filament lamp across the terminals
F-FF is to be connected which was to be in glowing condition initially.
4) Now the motor armature terminals and field terminals are connected to the
chopper output terminals A-AA and F-FF respectively.
5) By varying armature voltage through the chopper circuit observe the forward
and reverse motoring of the motor.
6) For each variation of armature voltage note down the speed, armature voltage
of the motor and duty cycle of the chopper.
7) Plot the graph for variation of speed of the motor with respect to duty cycle.
TABULAR COLUMN:Duty cycle
Armature voltageV
SpeedN (rpm)
PRECAUTIONS:1) Avoid loose connections.
2) Field winding of the motor should never be open circuited while the motor is in
running condition.
3) While switching OFF the kit the lamp connected across the A-AA terminals must
be in OFF position
RESULT:-
EXPERIMENT-6
Speed Control of Synchronous Motor Using 3-Φ VSI
AIM:- To simulate the 3-Φ synchronous motor with 3-Φ VSI and observe it’s
performance.
Software Used:Matlab Simulink
Block Diagram:-
CIRCUIT DIAGRAM:-
SIMULATION PROCEDURE:1.Connect the circuit in simulink environment by collecting all the required blocks as
per the circuit diagram.
2.Change the properties of pulse generation block to generate required pulses to the
switches used.
3.Change the properties of various blocks used as per the requirement.
4.Run simulink model from command line, and observe the output.
RESULT:-
EXPERIMENT-7
CLOSED LOOP SPEED CONTROL OF SEPARATELY EXCITED DC MOTOR
AIM:- To simulate separately excited DC motor and observe it’s performance.
Software Used:Matlab Simulink
Block Diagram:-
CIRCUIT DIAGRAM:-
SIMULATION PROCEDURE:-
1.Connect the circuit in simulink environment by collecting all the required blocks as
per the circuit diagram.
2.Change the properties of pulse generation block to generate required pulses to the
switches used.
3.Change the properties of various blocks used as per the requirement.
4.Run simulink model from command line, and observe the output.
RESULT:-
EXPERIMENT-8
SPEED CONTROL OF 3-Φ I.M USING 3-Φ AC VOLTAGE CONTROLLER
AIM:- To simulate the 3-Φ induction motor with 3-Φ AC voltage controller and
observe it’s performance.
Software Used:Matlab Simulink
Block Diagram:-
CIRCUIT DIAGRAM:-
SIMULATION PROCEDURE:1.Connect the circuit in simulink environment by collecting all the required blocks as
per the circuit diagram.
2.Change the properties of pulse generation block to generate required pulses to the
switches used.
3.Change the properties of various blocks used as per the requirement.
4.Run simulink model from command line, and observe the output.
RESULT:-
EXPERIMENT-9
STATIC ROTOR RESISTANCE CONTROL OF 3-Φ SLIP RING I.M
AIM:- To simulate the static rotor resistance control of 3-Φ slip ring induction motor
and observe it’s performance.
Software Used:Matlab Simulink
Block Diagram:-
CIRCUIT DIAGRAM:-
SIMULATION PROCEDURE:1.Connect the circuit in simulink environment by collecting all the required blocks as
per the circuit diagram.
2.Change the properties of pulse generation block to generate required pulses to the
switches used.
3.Change the properties of various blocks used as per the requirement.
4.Run simulink model from command line, and observe the output.
RESULT:-
EXPERIMENT-10
SPEED CONTROL OF 1-Φ I.M USING 1-Φ AC VOLTAGE CONTROLLER
AIM:-To simulate the 1-Φ induction motor with 1-Φ AC voltage controller and
observe it’s performance.
Software Used:Matlab Simulink
Block Diagram:-
CIRCUIT DIAGRAM:-
SIMULATION PROCEDURE:-
1.Connect the circuit in simulink environment by collecting all the required blocks as
per the circuit diagram.
2.Change the properties of pulse generation block to generate required pulses to the
switches used.
3.Change the properties of various blocks used as per the requirement.
4.Run simulink model from command line, and observe the output.
RESULT:-