In __________ drive each machine is driven by its own separate motor with the help of gears and pull

Question

In __________ drive each machine is driven by its own separate motor with the help of gears and pulley

Examoogle · Accepted Answer

Individual drive

Explanation: An individual drive is a configuration where each machine tool or load is powered by its own dedicated electric motor. This setup provides independent control and operational flexibility for each machine unit.

Working Principle: In this arrangement, the motor is mechanically coupled to the driven machine through power transmission elements like gears, pulleys, or belts. Because the motor is dedicated solely to one machine, the speed and torque characteristics can be tailored specifically to the requirements of that machine, and the motor can be started or stopped without affecting other equipment in the plant.

Key Formulas: $P_{in} = \frac{T \cdot \omega}{\eta}$ — Relation between motor input power, torque, angular velocity, and efficiency

Key Points: Used extensively in modern industries to ensure high reliability.; Eliminates the common shaft requirement found in group drives.; Allows for variable speed control by controlling the individual motor.

Advantages: High reliability (failure of one motor does not stop the entire plant).; Independent control of speed and torque.; Easy installation and layout flexibility.

Disadvantages: High initial investment cost.; Requires more floor space than a centralized group drive system.

Applications: Machine tools (lathes, milling machines).; Paper mills and textile machinery.; Conveyor systems.

Additional Info: Group drive utilizes one large motor to drive multiple machines via a line shaft and belts, which is less efficient due to friction losses.. Multimotor drive typically refers to systems like electric locomotives or rolling mills where multiple motors work in coordination for a single load.

Answer: A is correct — Individual drive uses a dedicated motor for each specific machine to ensure independent operation and control.

Exam Tip: Always remember that individual drives have higher capital costs but lower operational losses (I^2R and mechanical friction) compared to legacy group drive systems.

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