Reduction of energy of induction motor

1. Reduction of Energy
Consumption of Induction Motor
Presented by
Debjyoti

2. What’s The Need ??
• Energy crisis in the world will be one of the factors to impede the
economic growth.
• 70 % of all electrical energy consumed in India is used for driving
electric motors
• 55 % of which is consumed by industrial motors

3. How to Reduce???
By energy efficient motor(EEM) By interfacing the machine with VFD
devices

4. ENERGY EFFICIENT MOTOR
• “Energy efficient" motor, simply put, is a motor that gives you the
same output strength by consuming lesser amounts of power
• Energy efficient motors operate with efficiencies that are typically 2-
6% higher than standard motors.
• Operate more satisfactorily under abnormal voltage
• Electric power saving.
• Operating temperature is less.
• Noise level is lower.

5. Energy efficient machines designed
by…..
• By selection of energy efficient core and winding materials
• Normally core loss in a machine is around 30~ 50% of the total losses
and about 3% of the machine rating.
• Using core material having high permeability and low loss.
• Electrical steel of grades 8050, 8050H,5350,5350H
• Using die cast copper cage, Die cast copper rotor reduced total
energy losses by 15~23%.

6. .
• https://www.slideshare.net/imtiyazsayyed/energy-efficient-motor

7. Variable frequency drive (VFD)
• Variable Frequency Drive (VFD) is a type of motor controller that
drives an electric motor by varying the frequency and voltage
supplied to the electric motor
• Standard motors are constant speed and when they are energized
they run at a 100% speed no matter the load, by using VFD speed can
be controlled as per need & also load
• Equation of motor speed Speed= 120 x f /P , P=No. of poles, F=Line
Frequency

8. HOW DOESVFD SAVE ENERGY?
• The laws of physics dictate that:
• The pressure, or head, will vary with the square of the speed
• The energy consumed will vary with the cube of the speed
• For example, reducing the speed of a motor by 10% will:
• Reduce the pressure by 19% (.9 x .9)
• Reduce the energy used by 27% (.9 x .9 x .9)
• The real energy savings is around 25%,

9. .
•
https://www.slideshare.net/NageswarRao7/2-vfd

10. Pros & Cons
• VFD Reduces operating cost
• VFD has Many standard features
• Usually it is of normal cost and slightly more than the normal motors.
It is about 15% to 30% more than the normal motors. In Future, the
initial cost may be available at the same cost as a standard motor
when the population of EE Motors increases
• Initial cost is more

11. Thank you