Design of Distribution Transformers – e-lesson #1: Introduction – Mutual inductance phenomenon

This is the first e-lesson in the Design of Distribution Transformers course, authored and presented by Mario Salano.

This introductory course covers the design of distribution transformers, divided into three levels - basic, intermediate, and advanced. The focus will be on the electromagnetic and thermal design aspects of line frequency distribution transformers. Transformers operate based on electromagnetic induction, where a changing magnetic field induces a voltage. Key principles are Ampere's and Faraday's laws. Transformers have essential features like being static AC machines that transfer power without contact. The main design constraints are minimizing losses, managing temperature, and considering insulation and space. Transformers are designed using the fundamental equation relating voltage, flux, frequency, and turns. Grain-oriented steel is commonly used for the core. The lesson briefly mentions other transformer types beyond distribution, as well as the concept of an equivalent circuit model. Overall, this session lays the groundwork for the more detailed design topics in the intermediate and advanced course levels.