Laminations : Coil Winding Specialist, Inc.

EI Series

Stamped Transformer Lamination

CWS Bytemark stamped lamination are made of the highest quality of silicon steel available in the industry. These lamination are used by engineers to design low frequency (50/60 Hz) transformers and inductors. Applications are in power supplies, electronics, transportation and communications. Most of the popular sizes are available from stock in our warehouse in Orange, California and are available for immediate pick up or shipment. The table below shows the sizes that are stocked. The quantities available shows the actual quantity in stock and they changed every day as new shipment goes in and out of our warehouse. Our pricing is the most competitive in the market now, and we offer you, our customers, good cost savings to make your product more competitive in the market without sacrifices in the level of quality. Other shapes and thickness are available as we do custom tooling. We can also do stacked lamination using progressive die and tooling. The grain oriented steel which is M6 material is available in 29 gauge as standard thickness. The non grain oriented M19, and M50 are available in 29 and 26 guage.

Useful Design Formulas

B_m	= ^{3.489E x 10⁶} ⁄ _{NfA_cK_s} Gausses	L	= ^{3.192 x 10^-8µ N²A_cK_s} ⁄ _ℓ Henrys
E	= 2.866 x 10^-7 B_m N f A_c K_s volts	N	= ^{3.489 x 10⁶} ⁄ _{B_m f A_c K_s} turns
H	= ^{0.4947 N I} ⁄ _ℓ Oersteds	µ	= ^B ⁄ _H Gauss/Oersted

Legend

A_c	= core cross section area (center leg width x stack heigh) inch²	B_m	= maximum flux desnity, Gauss
ℓ	= mean length of flux path, inch	E	= RMS sine wiave voltage of winding
f	= sine wave frequency, Hertz	H	= magnetizing force, Oersted
K_s	= lamination stacking factor (K_s x A_c = effective core area)	L	= inductance, Henry
I	= current, ampere	N	= number of turns in winding
µ	= permeability (CGS system), Gauss/Oersted

Silicon Steel Alloys

ASTM	Thickness (in mils)	Description
M-6	.014	Grain oriented 3.3% SiFe.
M-19	.025	Non oriented silicon steels with 1.8 to 3.0% Si.
	.018	The fully processed grades have higher Si content and
M-22	.025	are harder, Rb>75, after the final anneal. They are
	.018	available varnish coated. The semi processed grades
M-27	.025	have a phosphate insulation, are always annealed after
	.018	stamping, yielding high permeability, and lower core loss
M-36	.025	for a given silicon content. This table lists only the
	.018	semiprocessed grades.

Low Carbon Steel Alloys

ASTM	Description
M-50	Low carbon steel insulated .025, 2.7-3.2W/#, 7VA#
M-55	Low carbon steel insulated .025, 3.7-4.2W/#, 7VA/#
M-56	Low carbon steel insulated .025, 4.3-4.8W/#, 8VA/#
M-65	Unannealed low carbon, .025, 6.5W/#, 15VA/#

Displaying 1 to 37 (of 37 products)

Part Number	Quantity on hand	Price
EI-112 26 M19	0	$1.07
EI-112 26 M50	7908	$1.05
EI-112 29 M6	3733	$2.31
EI-125 26 M19	0	$1.07
EI-125 26 M50	95.76	$1.05
EI-125 29 M6	-7.5	$2.31
EI-150 26 M50	0	$1.05
EI-150 29 M6	319	$2.31
EI-400 29 M6	0	$2.31
EI-100 26 M19	-65	$1.07
EI-100 29 M6	1788.76	$2.31
EI-137 26 M19	12387	$1.07
EI-137 29 M6	32	$2.31
EI-137 26 M50	8148	$1.05
EI-150 26 M19	638.7	$1.07
EI-175 26 M19	2192	$1.07
EI-175 26 M50	330	$1.05
EI-175 29 M6	5224	$2.31
EI-2.4 26 M19	17776	$1.07
EI-2.4 29 M19	150	$1.07
EI-2.4 29 M6	5407	$2.31
EI-212 26 M19	0.02	$1.07
EI-212 26 M50	500	$1.05
EI-300 26 M50	500	$1.05
EI-400 26 M19	-35	$1.07
EI-50 26 M19	9010.36	$1.25
EI-50 26 M50	2719.08	$1.14
EI-62 26 M19	551	$1.07
EI-62 29 M6	4527	$2.31
EI-75 26 M19	20609	$1.07
EI-75 29 M6	9990.6	$2.31
EI-87 26 M19	0	$1.07
EI-87 29 M6	2826	$2.31
EI-100 26 M6	0	$0.93
EI-100 26 M6	0	$0.93
EI-212 29 M6	0	$1.07
UI-75 29 M6	788

Displaying 1 to 37 (of 37 products)