Comparison between Auto-transformer and Conventional Transformer

S.no
Auto-transformer
Conventional transformer
1 It has only one winding, wound on a laminated core. It has two separate windings, i.e., primary and secondary windings.
2 The windings are not electrically insulated. The windings are electrically insulated.
3 The size of this transformer is small. The size of this transformer is large.
4 The primary and secondary winding circuits are connected magnetically and electrically. The primary and secondary winding circuits are connected magnetically.
5 It is more efficient and has better voltage regulation. Efficiency and voltage regulation are less when compared to an auto-transformer.
6 Has low leakage flux and resistance. Has high leakage flux and resistance.
7 Since the copper material required is less, it is very cheap and more economical. Since the copper material required is high, it is very costly and less economical.
8 Loss is low. Loss is high.
9 Generates variable output voltage. Generates constant voltage.
10 It is mostly used as a starter in an induction motor. It is mostly used to step-up or step-down the voltage in the power system.
11 Also called as VARIAC. Also called as two-winding transformer.
Spread the Knowledge

He is a Mechanical Engineer and Editor-in-chief of ME Mechanical. He holds a Bachelor of Engineering degree in Mechanical Engineering. He interested in the manufacturing field.

Leave a Reply

Your email address will not be published.

This site uses Akismet to reduce spam. Learn how your comment data is processed.