The whole concept describes power saving using soft starters which smooths the high initiating magnetizing current during starting of motor.

2. INDEX:
 Introduction
 Importance of motors
 Need of saving energy in motors
 Techniques of energy saving
 Conclusion

3. INTRODUCTION:
 An electric motor is a device that
converts electrical energy into rotary
kinetic energy.

4. IMPORTANCE OF MOTORS
 Electric motors are used to drive many
items of machinery such as pumps,
fans, conveyor belts compressors etc.

5. NEED OF SAVING ENERGY IN
MOTORS
 Almost 70% of all industrial electricity
is consumed by electric motors.
 In a single year the cost of the energy
needed to run a motor can be as much
as ten times its purchase cost.

8. ENERGY WASTAGE IN NORMAL IN
INDUCTION MOTOR
HEAT LOSSES
HIGH CURRENT
LOSSES
FRICTIONAL
LOSSES
IMPROPER
TRANSMISSION
SYSTEM

9. EFFICIENT METHODS OF
SAVING ENERGY IN MOTORS:
 Soft Starters
 Variable Speed Drives(VSD)
 Smart Motors
 Proper Transmission Systems

10. SOFT STARTERS:
 The device can sense if the motor is
lightly loaded or idling, which is when
the motor is least efficient, and then
ramps the power usage down while
maintaining the motor at a constant
speed.
 Temporarily reduce the load and
torque in the power train of the motor
during startup.
 Eliminates the harsh, violent
mechanical stresses.

11. GRAPHS SHOWING COMPARION
BETWEEN NORMAL MOTORS AND
SOFT STARTERS

12. 2.VARIABLE SPEED DRIVES
 A VSD converts the incoming
electrical supply from a fixed
frequency to a variable frequency
output. This frequency variation allows
the VSD to control the speed of the
motor.

13. 3.SMART MOTORS
 Smart motors
combine the
functionality of an
electric motor, a VSD
and a control unit. to
analyse load
conditions without
having to feedback
information to a
central control
system. This means
faster response time
and reduced cable
losses.

14. 4.TRANSMISSION SYSTEM
 Direct drives, where the load is
coupled directly to the motor shaft.
drive is correctly aligned with the
motor to prevent energy losses.

15.  Belt-driven pulleys, where the
output speed is adjusted by a pulley
system of different-sized wheels
connected by a belt, and the
pump/fan speed can be reduced by
changing the pulley ratio

17. CONCLUSION
 Saving energy in motors will help to
great extent as the power used by
electric motors accounts for nearly
two-thirds of the electricity consumed
by industry.
 Switching off motors wherever
possible.
 Locating motors and drives in areas
that don't get too hot.
 Keeping components clean .

18. By:
Payal
Saxena
P.Divya
5th Sem,