Design

Overview OFAF (Oil Forced Air Forced) uses pumps and fans for maximum cooling. Advantages Forced oil circulation with pumps Forced air with high-speed fans Compact design for high capacity Applications Large power transformers 60+ MVA, generator step-up transformers.

Introduction ONAF (Oil Natural Air Forced) adds fans to increase cooling capacity. Features Natural oil circulation Forced air with fans 30-50% increased capacity Applications Power transformers 10-60 MVA, where space is limited.

Introduction OFWF (Oil Forced Water Forced) uses water heat exchangers for cooling. Features Oil-to-water heat exchangers Compact installation Independent of ambient air temperature Applications Indoor substations, hydroelectric plants, industrial facilities with water availability.

Overview ONAN (Oil Natural Air Natural) is the most common cooling method for distribution transformers. How It Works Natural oil convection inside transformer Natural air cooling on radiator surfaces No pumps or fans required Applications Distribution transformers up to 10 MVA, substations, and industrial applications.

Introduction Ferrite cores are essential for high-frequency switching power supplies and RF applications. Properties High resistivity (low eddy currents) Operating frequencies: 10 kHz to several MHz Various materials: MnZn, NiZn Applications SMPS, flyback transformers, EMI filters, and RF circuits.

Introduction UI cores offer compact design for audio transformers and signal applications. Features U and I lamination configuration Excellent magnetic shielding Low leakage inductance Uses Audio equipment, signal isolation, and impedance matching.

Overview C-cores (cut cores) provide high efficiency with grain-oriented silicon steel. Advantages Continuous grain orientation Lower core losses than EI Higher flux density capability Applications High-efficiency distribution transformers and specialized power applications.

Overview EI laminated cores remain the most common choice for power transformers due to cost-effectiveness and proven reliability. Construction Silicon steel laminations (0.23-0.35mm) E and I shaped pieces interleaved Reduced eddy current losses Applications Power distribution, industrial control, and general purpose transformers up to 500 kVA.

Introduction Toroidal transformer cores offer superior efficiency and compact design for modern power applications. Key Advantages High efficiency (up to 95%) Low electromagnetic interference Compact size and light weight Low mechanical hum Applications Ideal for audio equipment, medical devices, and precision instruments where low noise and high efficiency are critical.