rp 1st ppt
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SARDAR VALLABHBHAI PATEL
INSTITUTE OF TECHNOLOGY
MECHANICAL - 1
15BEMEG052
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CLASSIFICATION OF ELECTRIC
DRIVE
GENERALLY CLASSIFIED INTO 3CATEGORIES:
I. GROUP DRIVE
II. INDIVIDUAL DRIVE
III. MULTIMOTOR DRIVE
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GROUP DRIVE :
IF SEVERAL GROUP OF
MECHANISMS OR MACHINES AREORGANIZED ON ONE SHAFT AND
DRIVEN OR ACTUATED BY ONE
MOTOR, THE SYSTEM IS CALLED A
GROUP DRIVE OR SHAFT DRIVE.
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ADVANTAGE :
MOST ECONOMICAL
DISADVANTAGE:
1. ANY FAULT THAT OCCURS IN
THE DRIVING MOTOR RENDERSALL THE DRIVING EQUIPMENT
IDLE.
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2. EFFICIENCY LO BECAUSE OF
LOSSES OCCURRING IN THE
ENERGY TRANSMITTINGMECHANISMS !POER LOSS"
#. NOT SAFE TO OPERATE.
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$. NOISE LEVEL AT THE OR%ING
SPOT IS HIGH.
5. FLE&IBILITY.
SINGLE MOTOR DRIVES A NO OFMACHINES THROUGH BELT FORM
COMMON SHAFT.
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INDIVIDUAL DRIVE:
1. IF A SINGLE MOTOR IS USED TO
DRIVE OR ACTUATE A GIVENMECHANISM AND IT DOES ALL THE
'OBS CONNECTED ITH THIS
LOAD , THE DRIVE IS CALLED
INDIVIDUAL DRIVE.
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2. ALL THE OPERATIONSCONNECTED ITH OPERATING A
LATHE MAY BE PERFORMED BY A
SINGLE MOTOR.
#. EACH MOTOR IS DRIVEN BY ITS
ON SEPARATED MOTOR ITH THE
HELP OF GEARS , PULLEYS ETC.
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DISADVANTAGE:
POER LOSS OCCURS.
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MULTI MOTOR DRIVE:
( EACH OPERATION OF THE
MECHANISM IS TA%EN CARE OF BYA SEPARATE DRIVE MOTOR.
( THE SYSTEM CONTAINS SEVERAL
INDIVIDUAL DRIVES EACH OFHICH IS USED TO OPERATE ITS
ON MECHANISM.
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( SEPARATE MOTORS ARE PROVIDEDFOR ACTUATING DIFFERENT PARTS
OF THE DRIVEN MECHANISM.
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MULTI MOTOR
DRIVE
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ADVANTAGE :
1. EACH MACHINE IS DRIVEN BY A
SEPARATED MOTOR IT CAN BE RUN
AND STOPPED AS DESIRED.2. MACHINES NOT REQUIRED CAN
BE SHUT DON AND ALSOREPLACED ITH A MINIMUM OF
DISLOCATION.
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#. THERE IS A FLE&IBILITY IN THE
INSTALLATION OF DIFFERENTMACHINE)S.
$. IN THE CASE OF MOTOR FAULT,
ONLY ITS CONNECTED MACHINE
ILL STOP HERE AS OTHERS ILLCONTINUE OR%ING UNDISTURBED.
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5. ABSENCE OF BELTS AND LINE
SHAFTS GREATLY REDUCES THE RIS%OF A ACCIDENTS TO THE OPERATING
PERSONNEL.
DISADVANTAGE:
INITIAL HIGH COST.
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PREPARED BY
RASESH PANKHANIYA
THANK YOU