KNOWLEDGE BASE

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Free industrial engineering and automation lessons by Dr. Machine — from electrical basics to AI

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Electricity & Electrons
What is Electricity? Electrons, Charge, and Current

A journey from inside the atom to understanding how electrons move and generate electricity in wires and circuits — covering voltage, current, resistance, and Ohm's law

8 min read
Electricity & Electrons
Ohm's Law and Electrical Circuits: Series and Parallel

How current flows through electrical circuits and how to calculate voltage and resistance — with practical applications in industrial control panels

8 min read
Electricity & Electrons
AC vs DC: Differences and Industrial Applications

Why do factories use AC? Where is DC preferred? Sine waves, frequency, RMS values, and rectification explained for industrial engineers

7 min read
Electricity & Electrons
Three-Phase Power: The Backbone of Modern Industry

How three-phase power works and why it is the foundation of every factory — star and delta connections, power calculations, and balancing

9 min read
Electricity & Electrons
Electrical Transformers: Stepping Voltage Up and Down

How transformers work using mutual induction — types, efficiency, and applications in factories and distribution substations

8 min read
Electricity & Electrons
Power Factor and Correction in Industrial Plants

Why factories pay penalties for low power factor and how to fix it with capacitors — active, reactive, and apparent power explained

7 min read
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