DETERMINATION OF TRANSFER FUNCTION OF FIELD CONTROLLED DC SERVO MOTOR PATCHING DIAGRAM TO DETERMINE FIELD INDUCTANCE, LF - Computer Programming

# Computer Programming

C C++ Java Python Perl Programs Examples with Output -useful for Schools & College Students

## Monday, March 28, 2011

Determination Of Transfer Function Of field CONTROLLED DC Servo Motor
PATCHING DIAGRAM TO DETERMINE FIELD INDUCTANCE, LF
PROCEDURE:

5. To determine moment of inertia J and frictional co-efficient B:

• Check whether the MCB is in OFF position in the DC servomotor trainer kit
• Patch the circuit as per the patching diagram
• Put the selection button of the trainer kit in the armature control mode and the DPDT switch in power circuit position.
• Check the position of the potentiometer; let it initially be in minimum position.
• Switch ON the MCB.
• Vary the pot and adjust the motor to run at rated speed.
• Note the values of armature current Ia, armature voltage Va, field current If, Speed N.
• Change the DPDT switch position from power circuit side to load side, simultaneously noting the time taken t1 of the motor to come to rest from rated speed, using a stop watch.
• Set the potentiometer to minimum position and change the DPDT switch to power circuit side
• Vary the pot and adjust the motor to run at rated speed
• Change the DPDT switch position from power circuit side to load side, simultaneously noting the time taken t2 of the motor to come to rest from rated speed, using a stop watch.
• Find the values of moment of inertia J  and frictional co-efficient B using the above values

OBSERVATIONS:
 S. No Armature Voltage, Va(V) Armature Current, Ia(A) Field Current, If(A) Speed, N (rpm) t1(secs) t2(secs)

CALCULATIONS: