Materials used in an electric motor
The objective is to analyze and understand the requirements of the materials used in an electric motor, understand the material requirement of each motor part, find out the materials utilized…
Transformer Tap changers: Off-Load and On-Load tap changers
Tap changers are voltage regulation equipment used to adjust the voltage ratio in transformers by adding or removing tapping turns. Voltage adjustments can be made by using either on-load tap…
Grounding transformer or Earthing transformer
Grounding transformers are used to obtain a neutral when an existing delta-connected or ungrounded systems are to be grounded. These transformers provide a path for the flow of fault currents…
Torque-speed calculator & speed-torque calculator
Here is a calculator that can be used to calculate torque from speed and speed from torque. Torque-speed calculator Enter motor torqueN.mlb.inlb.ftEnter motor powerhpkWCalculateResultMotor speedrpm Speed-torque calculator Enter the motor…
Rogowski Coils
A Rogowski coil is an electrical transducer, that functions similar to a current transformer and is used in a variety of applications to measure alternating current (AC). It is named…
Star-Delta starter wiring diagram – Control and power wiring diagrams
The power and control circuits of a star-delta starter are discussed in this article with the help of an actual star-delta starter wiring diagram. You can find the instructions to…
Transformer cooling methods
Transformers are the most efficient electric machine. A typical transformer is over 99% efficient. The small inefficiency is due to copper losses, core losses-hysteresis and eddy currents losses, stray and…
Types of Transformer windings
Transformer windings constitute the electrical circuit of a transformer. They are made up of current-carrying conductors wound around the core. The primary windings form the input to the transformer and…
Insulation materials used in transformers
Insulation materials are one of the most important elements in a transformer. They are used to electrically separate the conducting parts of a transformer from each other and from other…
Transformer core
A transformer core serves the following three important purposes: Provides mechanical support to the windings.Provides a low reluctance closed ferromagnetic path to the magnetic flux.Reduces the losses due to flux…