Automatic EI-86 Lamination Stacking Machine for Solar Inverter and UPS Transformer Core Assembly, ±0.1 mm Accuracy, 250 Stacks/Min, PLC Control, CE

EI-86 Automatic Lamination Stacking Machine for Solar Inverter and UPS Transformer Core Assembly

The EI-86 automatic lamination stacking machine is built for the transformer cores at the heart of renewable energy and backup power systems. Designed for EI-86 silicon steel laminations, it feeds E-type and I-type sheets alternately into pre-wound bobbins under closed-loop PLC control, completing interleaved stacking at up to 250 stacks per minute with stacking accuracy of plus or minus 0.1 mm and positioning accuracy of plus or minus 0.02 mm. It is the production tool for manufacturers supplying 300-600 VA isolation transformers to solar inverters, energy storage systems, and UPS platforms — products where efficiency ratings and continuous-duty reliability are the specifications that win orders.

Power Conversion Starts with the Core

In a solar inverter, a storage converter, or a UPS, the isolation transformer is one of the few components that handles the full power flow on a continuous basis. Its losses become heat that must be managed; its noise becomes a product feature; its reliability determines service life in installations that run for years without interruption. All three trace back to the core — and the core traces back to stacking quality. Air gaps from loose or skewed laminations raise excitation current and core loss; inconsistent stacking makes efficiency unpredictable from unit to unit. The EI-86 stacking machine removes that variability at the source: every E and I lamination is inserted in a deterministic PLC-controlled cycle, counted and verified by photoelectric sensor, and stacked in the interleaved pattern that flux distribution depends on. The result is cores — and transformers — whose measured performance matches their design.

Key Specifications

Efficiency That Compounds

✅ ±0.1 mm Stacking, ±0.02 mm Positioning – Tight lamination columns with minimized air gaps keep core loss low and predictable. In efficiency-rated products such as inverters and UPS platforms, consistent stacking is what lets every unit pass — not just the sample that was tested.

✅ Interleaved Stacking for Low Loss and Quiet Operation – The one-by-one E and I interleaved pattern distributes flux uniformly across the core cross-section, reducing stray losses and magnetostriction noise — both acceptance criteria for indoor power electronics.

✅ CRGO and CRNGO Dual Compatibility – The feeding mechanism handles grain-oriented and non-oriented silicon steel from 0.3 mm to 0.5 mm, so material grade can be matched to each product's efficiency target and cost frame without mechanical changes.

Built for Continuous Duty

✅ Deterministic PLC Cycles – Closed-loop Mitsubishi PLC control repeats the same feed-insert-count sequence every cycle. Production output stays uniform across shifts, so downstream testing sees consistent cores — and fewer rejects.

✅ Photoelectric Counting with Auto-Stop – Every lamination is counted and verified in-cycle; misfeeds stop the machine within 0.5 seconds and hold scrap below 0.3 percent. In high-reliability products, a stopped machine is cheaper than a field failure.

✅ Full Electrical Protection – AC220V overload protection, DC24V short-circuit protection, dual grounding, and an emergency stop button protect the machine through continuous multi-shift operation.

✅ Recipe Storage for Production Traceability – Stacking parameters are stored as named recipes on the 7-inch HMI and recalled in under 30 seconds, keeping repeat orders consistent with original production settings.

Applications

The EI-86 lamination stacking machine is used in the production of:

• 300-600 VA isolation transformers for solar inverters and storage converters

• UPS transformers for home and office backup power platforms

• Inverter output and drive transformers for renewable energy systems

• Power supply transformers for industrial converters and chargers

• Reactor and choke cores for filtering and power factor correction

Custom tooling for other EI sizes (EI-28 through EI-133) is available on request, so production can cover the full EI range on one platform.

After-Sales & Support

Direct factory supply with competitive pricing and CE certification. We have supplied EI lamination stacking equipment to globally recognized transformer manufacturers including GE Vernova, Eaton, CATL, and Chint Electric, with products exported to more than 20 countries. Delivery within 1-15 working days. The after-sales package includes video installation guidance, remote PLC parameter support, spare parts supply, and a 12-month warranty from the date of delivery.