Friends, today in this article we will learn about the losses in energy efficient motors. I am going to give information about all these in a very good way. So let’s start.
Losses in energy efficient motors
The losses in energy efficient motors are reduced by its structure in the following ways-
Core Losses
To reduce core losses in motors, the amount of high grade silicon steel should be up to 4%. This reduces magnetic losses. Hysteresis and eddy current losses are reduced by the use of silicon.
Standard capacity motors are laminated with 24 gauge whereas in energy efficient motors the lamination is made of 26 gauge or 29 gauge. Thus by changing the gauge the core losses can be reduced. This reduces the core losses by 10% to 25%.
Silicon steel should be used within a certain limit. Using silicon more than the prescribed amount increases the value of magnetic current and reduces the value of power factor.
Copper Losses
In energy efficient motors, the stator winding is selected in such a way that its resistance is minimum. To reduce the stator copper losses, it is necessary to increase the amount of copper section in the conductor. Due to this, the resistance in the winding decreases, and the value of I2R also decreases. The slots in the stator structure should be made in such a way that maximum amount of copper can be used in them. To reduce the rotor copper losses, the copper percentage in the rotor section bars and end rings can be increased.
Friction and Windage Losses
Friction losses in motors are due to friction in bearings while air losses are caused by ventilation fans and other rotating components. Friction losses can be reduced by improving bearings in energy efficient motors.
In energy efficient motors, heat loss is less due to less core loss and copper loss. Hence, air losses can be reduced by using less ventilation.
Stray Losses
Fixed losses in a motor depend on the design components and the functioning of the motor. These components can be reduced through the manufacturing process. Under this, fixed losses can be reduced by changing the slot number, slot structure, air gap length etc.
Insulation
In energy efficient motors, high efficiency is achieved by insulation by F and H class, by which the motor works successfully in high temperature conditions. Due to this, the maintenance cost of the motor is also reduced. In its manufacture, 30% more copper and 20% iron is used than normal to achieve high efficiency.
What did you learn today :-
Now you must have known the losses that occur in energy efficient motors. You must have got the answer to all these questions very well.
I hope you liked the information given by me, if you have any question/suggestion in your mind, then you can tell me by commenting below, I will definitely reply to your comment. If you liked this post, then you can also share it with your friends and relatives.