Three Phase Lamination
EI Core Three Phase Lamination
Three phase lamination cores are essential in the production of three-phase transformers. In transformers utilizing 3UI lamination cores, each of the three core arms supports a coil body. Unlike EI sheets, the 3UI sheets cannot be welded, as the joints of the E and I sheets are positioned within the coil body. As a result, the E and I sheets must be nested alternately during the manufacturing process. To achieve this, one or more identical sheets are inserted from one side of the coil body. Specialized nesting machines are available for 3UI sheets, which help significantly reduce manufacturing time.
3PH lamination Features
•Low core loss: Low core loss reduces heat generation, resulting in improved efficiency and longer lifespan.
•High permeability: High permeability enables stronger magnetic fields and better performance in AC motors and generators.
•Stacking factor: High stacking factor provides more space for winding and increases the overall efficiency of the motor or generator.
•Magnetic flux density: High magnetic flux density ensures efficient energy transfer in AC motors and generators.
•Insulation coating: Insulation coatings protect against short circuits, reducing the risk of damage and increasing safety.
Scope
Control Transformer
Power Transformer
Ballast Resistor
UPS
Charger
3PH lamination Features Table
| Type | a | b | c | d | e | f | Holes | ø | Gap |
|---|---|---|---|---|---|---|---|---|---|
| 3PEI-10 | 10 | 10 | 10 | 10 | 30 | 4 | 3.5 | ||
| 3PEI-13 | 13 | 13 | 13 | 13 | 39 | 4 | 3.5 | ||
| 3PEI-17.5 | 87.5 | 17.5 | 17.5 | 17.5 | 52.5 | 17.5 | 4 | 6 | |
| 3PEI-20 | 100 | 20 | 20 | 20 | 50 | 20 | 4,6 | 6 | |
| 3PEI-20 | 100 | 20 | 20 | 20 | 60 | 20 | 4,6 | 6 | |
| 3PEI-22 | 110 | 22 | 22 | 22 | 66 | 22 | 4,6 | 8 | |
| 3PEI-25 | 125 | 25 | 25 | 25 | 75 | 25 | 4,6 | 8 | |
| 3PEI-30 | 150 | 30 | 30 | 30 | 75 | 30 | 4 | 8 | |
| 3PEI-30 | 150 | 30 | 30 | 30 | 90 | 30 | 6 | 8 | |
| 3PEI-32 | 160 | 32 | 32 | 32 | 80 | 32 | 4 | 8 | |
| 3PEI-32 | 160 | 32 | 32 | 32 | 96 | 32 | 4 | 8 | |
| 3PEI-34* | 170 | 34 | 34 | 34 | 102 | 34 | 4 | 8 | |
| 3PEI-35 | 175 | 35 | 35 | 35 | 105 | 35 | 4 | 10 | |
| 3PEI-38 | 190 | 38 | 38 | 38 | 95 | 38 | 6 | 10.5 | |
| 3PEI-38 | 190 | 38 | 38 | 38 | 114 | 38 | 6 | 8 | |
| 3PEI-40 | 200 | 40 | 40 | 40 | 100 | 40 | 4 | 10 | |
| 3PEI-40 | 200 | 40 | 40 | 40 | 120 | 40 | 4,6 | 10 | |
| 3PEI-44 | 220 | 44 | 44 | 44 | 132 | 44 | 6 | 8 10.5 12 | |
| 3PEI-45 | 225 | 45 | 45 | 45 | 135 | 45 | 4,6 | 10 | |
| 3PEI-45.6* | 228 | 45.6 | 45.6 | 45.6 | 114 | 45.6 | 6 | 8 | |
| 3PEI-50 | 250 | 50 | 50 | 50 | 125 | 50 | 4 | 10 | |
| 3PEI-50 | 250 | 50 | 50 | 50 | 150 | 50 | 6 | 11 | |
| 3PEI-55 | 275 | 55 | 55 | 55 | 165 | 55 | 6 | 12 | |
| 3PEI-56 | 280 | 56 | 56 | 56 | 168 | 56 | 4 | 12 | |
| 3PEI-60 | 300 | 60 | 60 | 60 | 150 | 60 | 6 | 10 | |
| 3PEI-60 | 300 | 60 | 60 | 60 | 180 | 60 | 6 | 12 | |
| 3PEI-61 | 305 | 61 | 61 | 61 | 152.5 | 61 | 6 | 10.5 | |
| 3PEI-65 | 325 | 65 | 65 | 65 | 162.5 | 65 | 6 | 12 | |
| 3PEI-70 | 350 | 70 | 70 | 70 | 210 | 70 | 6 | 13 | |
| 3PEI-80 | 400 | 80 | 80 | 80 | 240 | 80 | 6 | 14 | |
| 3PEI-90* | 450 | 90 | 90 | 90 | 270 | 90 | 6 | 14 | |
| 3PEI-100* | 500 | 100 | 100 | 100 | 300 | 100 | 6 | 16 | |
| 3PEI-120* | 600 | 120 | 120 | 120 | 360 | 120 | 6 | 16 | |
| 3PEI-61(NS) | 288 | 61.5 | 52 | 61 | 144 | 52 | 4 | 12 | |
| 3PEI-27 | 135 | 27 | 27 | 27 | 81 | 27 | 4 | 8 | |
| 3PEI-27(NS) | 141 | 27 | 30 | 27 | 80 | 27 | 4 | 8 | |
| 3PEI-30.5 | 152.5 | 30.5 | 30.5 | 30.5 | 76.25 | 30.5 | 6 | 6 |
•Marked “*” model is manufactured by manually punch
•Determine the required core dimensions from transformer specifications.
•Choose laminations that fit the winding and bobbin size.
•Optimize core size for low core loss and reduced heat generation.
•Consider the stacking factor to maximize winding space and improve efficiency.
•Balance size and weight to achieve desired performance while maintaining manufacturability.