Classification of electric drive with advantage and disadvantage

Classification of electric drive with advantage and disadvantage
Generally classified into 3 categories:
Group drive
Individual Drive
Multimotor Drive

1. Presented by
Dr. R. RAJA, M.E., Ph.D.,
Associate Professor, Department of EEE,
Muthayammal Engineering College, (Autonomous)
Namakkal (Dt), Rasipuram – 637408
MUTHAYAMMAL ENGINEERING COLLEGE
(An Autonomous Institution)
(Approved by AICTE, New Delhi, Accredited by NAAC, NBA & Affiliated to Anna University),
Rasipuram - 637 408, Namakkal Dist., Tamil Nadu, India.
Classification of Electric Drive
with Advantage and Disadvantage

2. Classification of Electric Drive
Generally classified into 3 categories:
I. Group drive
II. Individual Drive
III. Multimotor Drive
Group Drive :
If several group of mechanisms or machines are organized on one shaft and
driven or actuated by one motor, the system is called a group drive or shaft
drive.
Advantage :
Most Economical

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3. Disadvantage:
Any Fault that occurs in the driving motor renders all the driving equipment
idle.
Efficiency low because of losses occurring in the energy transmitting
mechanisms (Power loss)
Not safe to operate.
Noise level at the working spot is high.
Flexibility.
Single motor drives a no of machines through belt form common shaft.

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4. Individual Drive:
If a single motor is used to drive or actuate a given mechanism and it does all
the jobs connected with this load , the drive is called individual drive.
All the operations connected with operating a lathe may be performed by a
single motor.
Each motor is driven by its own separated motor with the help of gears , pulleys
etc.
Disadvantage:
Power loss occurs.


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5. Multi Motor Drive:
Each operation of the mechanism is taken care of by a separate drive motor.
The System contains several individual drives each of which is used to operate
its own mechanism.
Separate motors are provided for actuating different parts of the driven
mechanism.
Disadvantage:
Initial high cost.


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6. Advantage :
Each Machine is driven by a separated motor it can be run and stopped as
desired.
Machines not required can be shut down and also replaced with a minimum of
dislocation.
There is a flexibility in the installation of different machine’s.
In the case of motor fault, only its connected machine will stop where as others
will continue working undisturbed.
Absence of belts and line shafts greatly reduces the risk of a accidents to the
operating personnel.

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7. Thank You
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