20-03-2012, 04:43 PM
ELECTRICAL DRIVES
electrical_drives2.ppt (Size: 651.5 KB / Downloads: 170)
WHAT IS A DRIVE
LITERALLY, A DRIVE IS DEFINED AS A FORM OF MACHINE EQUIPMENT DESIGNED TO CONVERT ELECTRICAL ENERGY TO MECHANICAL ENERGY AND PROVIDE ELECTRICAL CONTROL OF THIS PROCESS.
CLASSIFICATION:
GROUP ELECTRIC DRIVE
INDIVIDUAL ELECTRIC DRIVE
MULTIMOTOR DRIVE
FEED DRIVES
KEY FUNCTION:
To cause motion of the programmed machine member such as table, slide, tool holder etc.
STRIKING FEATURE:
High speed.
Constant torque output throughout the speed range.
Fine speed regulation.
Four quadrant operation.
Fast response characteristics
SPINDLE DRIVES
KEY FUNCTION:
To provide the required power for metal removal in a machine tool.
Example: In milling machine the spindle drive drives the cutter.
STIKING FEATURES:
Variable speed.
Fast response characteristics.
High speed.
Constant power.
Fully enclosed motor.