Category Archives: Control Engineering

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Variable Frequency Drive VFD Motors Principle & Equation

What is a VFD? As the name describes VFD or Variable Frequency Drive is motor controller that drives an electric motor by applying the varying frequency and voltage to the electric motor that are used in the case where we need to change the speed of motors depending upon the load requirements. Other names for… Read More »

Resistor Color Code Chart & Resistor Calculator

If you want to understand resistor color coding then you are at right place where you are explained full resistor calculator depending upon the resistor colour bands which are always confusing for the electricians. There are 4, 5 and 6 bands on different resistors. How to Read Resistor Color Code? Resistors are color coded for… Read More »

Construction Usage & Operating Principle of Light Dependent Resistors LDR’s

LDR or Light Dependent Resistor which is also known as photo resistor is a device whose resistivity is a function of the incident electromagnetic radiation. SO we can say that these are light sensitive devices. Other terms which are used for LDR are photo conductors, photo conductive cells or simply photocells.  Light dependent resistor (LDR) or… Read More »

Bipolar Junction Transistor | pnp bjt hbt jfet npn Transistor

What is a Transistor The transistor is a three-layer semiconductor device that consists of: two n-type layers and one p-type layer of material which is called npn transistor two p-type layers and one n- type layer of material which is called an pnp transistor There are two basic types of transistors i.e.bipolar junction transistor or… Read More »

Electric Busbar Protection | Bus Bar Differential Protection

Before discussing the types and importance of busbar protections let’s see what is a bus bar? The word bus is derived from Latin word “OMNIBUS” that means common for all, so busbar is actually a common and main part of a power distribution system that serves as nerve center of the power system where various… Read More »

Introduction of Control Engineering | Closed Loop Open Loop Control Systems

Control system engineering is the branch of engineering which deals with the principles of control theory to design a system which gives desired behavior in a controlled manner. A controlled system consists of highly integrated coordination of mechanical, electrical, chemical, metallurgical, electronic or pneumatic elements. System Control engineering deals with diverse range of dynamic systems which… Read More »