Electrical Machines

A star delta starter cuts a large induction motor starting current by starting in star, then switching to delta. See how it works and where it falls short.

A power transformer works as four systems: core and winding, breathing, connection and control, and cooling and protection. Learn what fails in each one.

Oil-filled transformers dominate the market but carry fire risk; dry-type transformers eliminate that risk for hospitals, ships, and data centers.

An auto transformer saves copper only near a 1:1 ratio and lacks isolation, which is why regular transformers still handle most voltage changes.

An auto transformer saves up to 50% of the copper used in a regular transformer, but loses electrical isolation, which limits where it can be used.

An induction motor nameplate lists 15+ parameters: output power, speed, voltage, current, thermal class, efficiency, duty, and IP rating explained.

Power transformers step voltage up or down at generation and transmission substations, while distribution transformers step down for end consumers.

Induction motor drawbacks include high starting current, low starting torque, poor power factor, and difficult speed control, each with a practical fix.

Induction motors are classified by supply (single-phase or three-phase), rotor design (squirrel cage or slip ring), starting method, and application.

An induction motor is built from a stator, rotor, shaft, bearings, and enclosure each part explained here, with its role and common failure points.

An induction motor works when the stator's rotating magnetic field induces current in the rotor, which reacts with that field to produce torque.

Electric motors use 72% of industrial electricity (IEA). See why induction motors are the default choice: reliability, low maintenance and cost.

Induction motor failures are often preventable. This guide explains the top 5 causes and practical ways to avoid costly breakdowns.

Transformer failures don’t happen suddenly. This article explains the 5 real causes and how they develop over time.

Transformer working principle: how electromagnetic induction steps voltage up or down using coils and cores, explained for beginners.

Transformers are rated in KVA or MVA. Why we cannot rate them in kW or kVAR? In this tutorial, let’s understand this. Understand now.

In this tutorial, I'll explain the 2 simple steps to calculate current of any induction motor. Induction motor can be single phase or three phase.

In this tutorial, I'll explain 2 simple steps from which you can calculate primary current of any transformer. Transformer can be 1 phase or 3 phase.