O'Reilly logo

Electrical Applications 2 by David W. Tyler

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

72 Transformers
ADVANTAGES OF THE
AUTO-TRANSFORMER
OVER THE DOUBLE-
WOUND TRANSFORMER
60 A
A 1
;
500
V
|
é
A
I5A
75 A
A
400
V
o
Figure 5.14
1 Less copper is required. The volume of copper in a winding is
proportional to the number of turns and to the cross-sectional area
of the wire used, which is in turn proportional to the current to be
carried.
Therefore volume of copper oc NI.
For a double-wound transformer
Volume of copper oc
N
P
I
P
+
I
S
N
S
and assuming ideal operation
TVp/p =
I
S
N
S
Therefore Volume of coppe<