sanjiv

10-24-2006, 02:15 AM

Being a Mechanical Engineer, it is very hard to understand the designing of electronics/electrical. But fortunately i came to understand about designing a transformer. i saw many friends searching for specific voltage transformer on cnc zone.

so for building a transformer, first survey the core. it may be I section, E section or toroidal.

If u found some in junk, pl. strip it.

Let us assume u found E section core

step:

1. the basic formula for calculating " Number of turns per Volt per square inch" is 7 ( it is universal after studying numerous books having very complex designing & calculations)

now assuming u want to make a transformer rating 240 V to 24V. u found core having X sectional area of 3 sq. inch.

Hence for primary winding:

7divide by 3 multiply by 240= 560 turns

Secondary winding

7 divide by 3 multiply by 24= 56 turns.

it is so simple & used.

For gauge of wire for desired current, pl refer to supplier of winding wire.

Sanjiv

so for building a transformer, first survey the core. it may be I section, E section or toroidal.

If u found some in junk, pl. strip it.

Let us assume u found E section core

step:

1. the basic formula for calculating " Number of turns per Volt per square inch" is 7 ( it is universal after studying numerous books having very complex designing & calculations)

now assuming u want to make a transformer rating 240 V to 24V. u found core having X sectional area of 3 sq. inch.

Hence for primary winding:

7divide by 3 multiply by 240= 560 turns

Secondary winding

7 divide by 3 multiply by 24= 56 turns.

it is so simple & used.

For gauge of wire for desired current, pl refer to supplier of winding wire.

Sanjiv