Design your ideal low loss transformer with our high quality strip-wound cores or switch to the latest in folded core technology with advanced grain oriented

The heart of your transformer is the core of our business

Benefits Of The Jencore (Unicores)

• Flexibility of design
• Unrestricted core size
• Smaller and lighter
• Lower watt loss
• Lower exciting current
• Better regulation
• Less winding time needed
• Quicker to assemble
• Major cost savings
  

The performance of the Jencore (Unicore) is such that full retention of the magnetic properties of the parent material is possible.

This is because:

• the exciting field is in parallel with the strip
  
• the Distributed Gap Jencore (Unicore) effectively has no gaps.
  
• the steel suffers no more degradation after annealing.

The single phase C-Core is a cut, bonded core having a rectangular window. The E-Cores are 3-phase cores which are formed from two adjacent identical C cores, surrounded by a third C-Core resulting in the three limbs each having the same nett cross sectional area.

Available Core types

• Single phase shell type.
  
• Single phase core type.
  
• Three phase Evans design.
  
• Three phase 5 limb.
  

The cut is generally located in the middle of, and perpendicular to, the large axis of the window but may, however, be located elsewhere on request. The geometric characteristics are shown in the diagrams that follow. Material used is M5 GOSS or H530 NOSS. Other materials can be used depending on the availability thereof.

Our speciality is making non-standard cores to user specifications. This includes any size of toroidal cores, from a 5mm strip to a 200mm strip.

Some of the laminations produced require heat treatment facilities to develop the best properties of the material. AMC also has a range of controlled atmosphere furnaces available to satisfy this need.

Quality control is provided to ensure that the products are of the highest mechanical and electro-magnetic quality. We are always available to discuss with you any special requirements.

Material used is fully processed Non-Oriented Silicon Steel with a coating on both sides. The watt loss figures are given at 1.5 Tesla so "50H 350" or "V350 – 50A" would indicate a material 0.50mm thick showing a loss of 3.50 w/kg at 1.5 Tesla. Generally 50H 350 and 50H 530 are kept in stock while a full range (50H 230-50H 600) is available at short notice.

For specific requirements where size and losses must be kept to a minimum, and C cores cannot be used, laminations in M6 GOSS can be used. AMC keeps a wide range of these laminations to satisfy customers’ immediate demands.

Magnetic properties

Operating Flux Density:

• Typical Single Phase: 1.3 - 1.4 Tesla
• Typical Three Phase: 1.25 - 1.35 Tesla

Saturation:

• Induction (T) as cast: 1.56

No - load Core Loss and Exciting Power:

• At the test condition of 1.3T, 50Hz, specific loss ≤0.18W/kg; specific exciting power ≤0.45VA/kg
• At the test condition of 1.3T, 50Hz, specific loss ≤0.20W/kg; specific exciting power ≤0.60VA/kg
• The no-load loss and exciting power of the three phase - Evans core will be approximately 25% higher and will vary according to specific design
  
  

Physical properties

Core Space Factor:

• Guaranteed Minimum: 86%
  

Density:

• g/cm3 as cast: 7.19
  

Core Design Standards:

• Ribbon width (A): 142mm, 170mm, 213mm
  
• Core build-up (B): 0~300mm; maximum
  
• Window width (C): 55~1500mm; tolerance: +3/-0m
  
• Window height (D): 180~2000mm; tolerance: +3/-0mm
  
• Joint build (G): B x 1.10~1.20mm
  
• Window radius (R): 6.4 +/-1.5mm
• Outermost layer shearing length: not more than 100000mm
• Continuous service temperature: 150oC

Core surface is coated in Epoxy Resin, not more than 2mm thick per side, (Dimension (H)) Ribbon width +4mm.

Plastic Accessories

• Lose lead bobbins in nylon and polypropylene
• UI and 3UI laminations bobbins
• PCB transformer bobbins and housings
• Nylon bobbins with terminals
• Nylon insulation and washers
• Other types of housings
• Pins
  

Steel Accessories

• Box Frames
• Mounting frames
• Saddle clamps
• Angle brackets
• Terminal holder brackets
  

AMC Group of companies