Power saving motors

ENERGYSAVING MOTORS

INDEX:

Introduction Importance of motorsNeed of saving energy in motorsTechniques of energy savingConclusion

INTRODUCTION:An electric motor is a device

that converts electrical energy into rotary kinetic energy.

IMPORTANCE OF MOTORS

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

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.

ENERGY WASTAGE IN NORMAL IN INDUCTION MOTOR

HEAT LOSSESHIGH CURRENT LOSSESFRICTIONAL LOSSESIMPROPER TRANSMISSION SYSTEM

EFFICIENT METHODS OF SAVING ENERGY IN MOTORS:

Soft StartersVariable Speed Drives(VSD)Smart MotorsProper Transmission Systems

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.

GRAPHS SHOWING COMPARION BETWEEN NORMAL MOTORS AND

SOFT STARTERS

2.VARIABLE SPEED DRIVESA 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.

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.

4.TRANSMISSION SYSTEMDirect drives, where the load is

coupled directly to the motor shaft. drive is correctly aligned with the motor to prevent energy losses.

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

CONCLUSIONSaving 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 .

THANK YOU

By:Payal SaxenaP.Divya5th Sem, EEESSCET