Cut cores (C-and E-cores): Cores are wound onto rectangularly shaped mandrels, annealed and resin impregnated before being cut in two utilizing abrasive cutoff machines.

The cut surfaces are meticulously polished and treated to reduce excitation current and losses. Core halves may be shimmed apart to produce defined gaps in chokes and line reactors. E-cores have three legs for three phase designs. Cut cores are assembled utilizing steel bands under controlled tension.

Alpha-Core Direct: (Items that can be shipped from stock)

Traditionally, engineers have enjoyed unlimited freedom in specifying a new core for every power transformer design, and as a result most are being made to order rather than being held as stock items. At Alpha-Core we find that this practice is wasteful and impedes the transition from E-I designs to the far superior toroids. Of course we still produce any shape toroid from zero to 25 KVA.

• Non Adhesive Polyester Tape

• Pressure Sensitive Polyester

• Kapton™

• Adhesive Copper Tape

• Quick Reference Design Information: Toroidal Cores With Primary Windings and Tape Insulation

Core Type:
Toroid, Split Toroid, Gapped Toroid, C-cores and E-cores, Rectangular Uncut or Special Shape

Dimensions:
Toroid: F, A and D, or F, E and D;
Rectangular: F, G, E and D;
Special Shape (minus coating): provide a drawing

Strip Material:
Grain Oriented Silicon Steel, M3, M4, M5, HiB;
Thin Gauge Silicon Steel: 4 mils
Other Magnetic Materials

Treatment:
Bare, Edge Bonded, Impregnated, Encapsulated, Film Coated;
If Encapsulated: State Thickness of Coat (standard is 15-20 mils)