What is a solenoid?

A magnet is a coil of insulated wire that is wound on a rod-shaped form made of solid iron, solid steel or iron powder and generates a magnetic field when…

How to test a thyristor?

How to test a thyristor (SCR): Obtain a bench DC power supply with adjustable output voltage and current limit. For example 0–30Vdc 0–5A Set the power supply to around 30 Vdc…

What is rectifier circuit?

A  rectifier  is an electrical device that consists of one or more diodes and converts alternating current (AC) to direct current (DC). A diode is like a one-way valve, in which electrical…

How electricity generate?

Methods of electricity generation There are seven basic methods to convert other forms of energy directly into electrical energy: Static electricity through physical separation and charge transport (examples: triboelectric effect…

What is VDC power?

VDC is an abbreviation for “Volt DC”. DC stands for “direct current”, which means that the voltage is constant (in contrast to alternating current, alternating current, in which the voltage oscillates…

How does a DC motor work?

There are basically two principles that govern a DC motor. How to repel poles of a magnet and tighten them differently. We have all played with magnets and are familiar with…

Why is earthing required?

Earthing provides a low impedance ground path for power if an insult fails and a live cable comes into contact with an exposed part of a device, causing the device…

What is motor protection?

Motor protection is the isolation of the motor from the main supply in the event of an abnormal condition in the operating state of an motor (i.e. when the motor…