direct current motor speed control

Direct Current Motor Speed Control Methods and Techniques

Direct current motor speed control is vital when consider on industrial applications.  There are different types of DC motors available in electrical engineering industries . The speed controlling methods of one type of direct current motor is different one by another. Speed of direct current motors are directly proportional to the back emf generat. The speed controlling of DC motors are basically done by manually or by using automatic controlling device. By comparing with other types of...

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Types of Direct Current Motors

Types of Direct Current Motors Your Should Get Know

There are several types of direct current motors which widely use in electrical engineering industry as industrial motors. Normally electrical motor is a device which convert electrical power in to mechanical power. Fleming’s left hand rule (F=BIl) is the fundamental theory of any electrical motor. The main purpose of the armature winding of the DC motor is to carry the DC current into motor. This supply is apply through carbon brushes on the special arrangement of the motor called...

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Corona Effect in Transmission Line

Performance of Electric and magnetic Field and Corona Effect in High Voltage Transmission Line

We have already discussed so many articles regarding some of the greater features of high voltage overhead transmission lines. Such as Transportation of Transmission Line, Skin effect of power lines  etc.  Today we are going to discuss another important feature of high voltage transmission lines which are the Corona Effect in High Voltage Transmission Line and the Electric and magnetic Field effect. Corona Effect in High Voltage Transmission Line Voltage up gradation of the existing lines...

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Sag in Transmission Lines

What is the Sag in Transmission Lines and How to Calculate it ( Application of Sag Template)

The Sag in Transmission Lines is applied to the ground profile by moving the same horizontally while always ensuring that the vertical axis or centerline is held vertical.  The sag of high voltage transmission line can simply define as the difference between one level point of and the lowest point of the conductor. The Structure Positions are marked where the tower footing curve cuts the ground profile, while the ground clearance curve is just clear and above the ground profile. The ground...

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Lightning Performance

Lightning Performance of an Overhead Transmission Line

  The Lightning Performance of an overhead transmission line is frequently little changed by upgrading the line voltage. However, upgrading of transmission line should be accompanied by an analysis of the lightning performance of transmission line with respect to shielding failures for lines and or back flashovers. For transmission lines with existing overhead earth wires, it must be ensured that increase in cross arm length or displacement of conductor away from the tower body is followed...

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sag template

What is Sag Template of Electrical Power Transmission Line?

A sag template is specifically design for transmission line according to their voltage levels. According the voltage levels and the conductor used there are specific design conditions are used.Sag Template is a very important feature for the surveyor by the help of which the position of tower can be decided on the Survey Chart so as to conform to the limitations of specified minimum ground clearance required to be maintained as per prevailing national rules, between the line conductor to ground...

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High Voltage Transpostion

What is Transposition of Transmission Line and Features of It

The basic definition for transposition of transmission line is to rotate the conductors which result in the conductor or a phase being moved to next physical location in a regular sequence. In electrical power transmission lines, the conductor arranges unequal space. So the voltage drops are not same as one place to another. To eliminate this effect can simply do by interchange the conductor position which is known as transposition.  When the transmission line is more than 100 km long, then...

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