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Building Transformer & flux density
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From: Ed Phillips [SMTP:evp-at-pacbell-dot-net]
Sent: Monday, June 15, 1998 7:00 PM
To: Tesla List
Subject: Re: Building Transformer & flux density
All:
The following expression gives the peak flux density in GAUSS
for a magnetic circuit:
Bmax = 10^8 x Epeak / (4.44 x A x N x f)
where:
Bmax is in GAUSS (1 TESLA = 10,000 GAUSS)
Epeak is the peak value (1.414 x RMS) of a sinusoidal wave
A is the core area in square centimeters
N is the number of turns
f is the frequency in cps (Hz for you SI fans!)
If the exciting waveform is a square wave, as in switching converters,
the 4.44 is replaced with 4.
Ed