ENERGY EFFICIENT MOTOR

PRESENTED BY :- SAYYED IMTIYAZ

INTRODUCTION

In the future, the cost of energy will increase due to environmental problems and limited resources.

The electric motor consume major part of the electric energy in the industry.

The induction motor is the main driven system in the modern industrial society.

It would also reduce the production of greenhouse gases and push down the total environmental cost of electricity generation.

Energy Efficiency Purpose

The purpose of energy efficient motors is to be able to supply the same level of energy service only using less energy.

Efficient energy use is achieved primarily by means of a more efficient technology or process rather than by changes in individual behavior.

Energy conservation reduces the energy consumption.

Efficiency

Definition of "efficiency".

For an electric motor, efficiency is the ratio of mechanical power delivered by the motor (output) to the electrical power supplied to the motor (input).

Efficiency = (Mechanical Power Output / Electrical Power Input) x 100%

Thus, a motor that is 85 percent efficient converts 85 percent of the electrical energy input into mechanical energy.

The remaining 15 percent of the electrical energy is dissipated as heat, evidenced by a rise in motor temperature.

Energy efficient electric motors utilize improved motor design and high quality materials to reduce motor losses, therefore improving motor efficiency.

Description of motor component’s losses

Copper loss:Depends on the effective resistance of motor winding.

Iron loss:Depending on the magnetic structure of core and results

from a combination of hysteresis and eddy current effect due to change in magnetic field in the motor’s core.

Friction and windage loss:Occurs due to the friction in the bearing of the motor.

Construction of EEM

Rated hp Standard MotorHigh-Efficiency

Motor

 10.0 85.2 90.1

 20.0 87.8 91.9

 30.0 89.1 92.7

 50.0 90.5 93.8

100.0 91.8 94.7

150.0 92.9 95.5

200.0 94.0 95.4

Average Full Load Nominal Efficiencies Standard and Energy Efficient Motors

Advantages

The EEM has a greater efficiency than a standard motor; therefore they have less operating costs.

EEM has a lower slip so they have a higher speed than standard motor.

EEM can reduce maintenance costs and improve operations in industry due to robustness and reliability.

Application

Energy efficient motors are specially suited for industries which are power intensive and equipments which run on constant load for long duration.

For example: fans, blowers, pumps, compressors etc. are some of the driven equipments and industries such as textile, paper, cement, power generation etc.

Conclusion

Finally I conclude that most of the industrial loads having motor are consuming 70% of the total electricity. So it is better to replace standard motors with EEM where ever economical. So that

We can

Save energy.

Save money.

Save atmosphere from pollution.

THANK YOU