Building Transformer & flux density

• To: "'Tesla List'" <tesla-at-pupman-dot-com>
• Subject: Building Transformer & flux density
• From: Tesla List <tesla-at-stic-dot-net>
• Date: Mon, 15 Jun 1998 23:23:05 -0500
• Approved: tesla-at-stic-dot-net

----------
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

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