📊 KATOY EI Power Transformers
Katoy’s EI-core transformers combine the classic strengths of EI design—affordable, reliable, easy-to-manufacture structures—with their commitment to precision manufacturing and application versatility. Whether used in power supplies, welding equipment, audio gear, or industrial controls, these transformers offer dependable performance paired with cost efficiency and ease of integration.
Katoy can manufacturer EI Power Transformers to any specification required for your application.
🔧 What Are EI-Core Transformers?
EI-core transformers are so-named due to their core structure, which uses stacked E‑shaped and I‑shaped laminated steel sheets to form a closed magnetic circuit. The windings are typically placed around the central leg of the “E,” with the “I” piece closing the magnetic path.
Key Characteristics:
- Laminated silicon steel core: reduces eddy current losses and improves efficiency at mains frequencies (50/60 Hz).
- Cost-effective manufacturing: simple to stamp and assemble, making them ideal for large-scale production.
- Good power handling and wide availability in standard size.
✅ Pros & Cons of EI-Core Design
| ✅ Advantages | ❌ Drawbacks |
|---|---|
| Lower manufacturing cost; mature production process | More audible hum due to magnetostriction |
| Mechanical robustness; easy repair or replacement | More magnetic flux leakage and EMI; may need shielding |
| Efficient cooling via open “window” core design | Bulkier and heavier than toroidal equivalents for similar power ratings |
🎯 Applications of EI-Core Transformers
These transformers are widely used in:
- General-purpose power supplies and industrial machinery
- Audio amplifiers (e.g. impedance matching or output transformers)
- Lighting systems, HVAC, and control circuitry
- Instrument and isolation transformers in medical and telecom systems.
🏭 EI-Core Transformers by Katoy Electronics
Katoy’s EI Transformer Features:
- Built with stacked E‑I laminations using quality silicon-steel for reliable magnetic performance.
- Designed for voltage regulation and power conversion in industrial and electronic equipment.
- Common in welding equipment, EV charging, industrial power supplies and general transformer applications
Strengths of Katoy EI Transformers:
- Cost-effective solutions due to proven EI production methods.
- High reliability and durability suitable for demanding environments.
- Compatibility with standard manufacturing and replacement parts.
- Scalable for different power ratings and adaptable with modular design or taps for flexibility.
