# Archive: Category «Electrical Lectures»

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# The basics of power in alternating current circuits (you MUST NEVER forget)

In a DC circuit, the power is equal to the voltage times the current, or P=V×I. This is also true in an AC circuit when the alternating current and voltage… Read more

Jul 08, 2016 | Edvard

# How do you become a master electrician?

There are a number of differences between the Journeyman test and the Master electrician exam. Generally speaking, the test for the Master electrician’s exam has more questions, lasts longer and… Read more

Jul 05, 2016 | Edvard

# 12 Basic Motor Types Used For Industrial Electric Drives

Almost all modern industrial and commercial undertakings employ electric drive in preference to mechanical drive because it possesses the following advantages : It is simple in construction and has less… Read more

Jun 21, 2016 | Edvard

# 6 Adjustable Tripping Settings of a Circuit Breaker You MUST Understand

There are (at least) six basic adjustable tripping settings (functions) you must understand in order to fully understand how circuit breaker actually works. All these adjustable functions actually shape the… Read more

Jun 10, 2016 | Edvard

# Every car has it – The Lundell generator with claw-pole rotor

Increasing comfort and safety in cars, trucks, and buses driven by combustion engines require more installed electric power on board. As of now, the Lundell generator (claw-pole rotor generator) is the… Read more

May 06, 2016 | Edvard

# Superposition Theorem Used To Solve The Simple Network

Using Superposition theorem, find the current through the 2Ω resistor of the network of Figure 1 above. The presence of three sources will result in three different networks to be… Read more

Apr 30, 2016 | Edvard

# Electric Circuits? It’s All About Nodes, Branches, and Loops

Since the elements of an electric circuit can be interconnected in several ways, we need to understand some basic concepts of network topology. To differentiate between a circuit and a… Read more

Apr 23, 2016 | Edvard

# Two Basic Methods Used For Braking a Motor (DC Injection and Dynamic)

Two common basic methods used for braking a motor are DC injection braking and dynamic braking. We will look at both in detail, starting with electric braking. DC Injection Braking… Read more

Apr 18, 2016 | Edvard

# Why Do We Care So Much About Power Factor Correction?

Power factor, as every electrical engineer should know, is defined as the ratio of real power to volt-amperes and is the cosine of the phase angle between the voltage and current in… Read more

Apr 15, 2016 | Edvard

# AC versus DC. Those were the days…

Take warning! Alternating currents are dangerous. They are fit only for powering the electric chair :) The only similarity between an AC and a DC lighting system is that they… Read more

Apr 13, 2016 | Edvard

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