Mindblown: a blog about philosophy.
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Ideal Transformer
The ideal transformer has no losses. There is no magnetic leakage flux, ohmic resistance in its windings and no iron loss in the core. EMF Equation of Transformer N1 – number of turns in primary. N2 – number of turns in secondary. Φm – maximum flux in weber (Wb). T – time period. Time is taken for 1…
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Parts of a Single-phase Transformer
The major parts of a single-phase transformer consist of; 1. Core The core acts as a support to the winding in the transformer. It also provides a low reluctance path to the flow of magnetic flux. The winding is wound on the core as shown in the picture. It is made up of a laminated…
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Working Principle of a Transformer
The transformer works on the principle of Faraday’s law of electromagnetic induction and mutual induction. There are usually two coils primary coil and secondary coil on the transformer core. The core laminations are joined in the form of strips. The two coils have high mutual inductance. When an alternating current pass through the primary coil it creates…
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Transformer Types
Transformers are used in various fields like power generation grid, distribution sector, transmission and electric energy consumption. There are various types of transformers which are classified based on the following factors; Working voltage range. The medium used in the core. Winding arrangement. Installation location. Based on Voltage Levels Commonly used transformer type, depending upon voltage…
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What is a Transformer?
A transformer is a device used in the power transmission of electric energy. The transmission current is AC. It is commonly used to increase or decrease the supply voltage without a change in the frequency of AC between circuits. The transformer works on basic principles of electromagnetic induction and mutual induction.
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VFD Basics IGBT inverter
Variable Frequency Drives Explained – VFD Basics IGBT inverter If you work in HVAC, then you need to check out the inverter compressors by Danfoss, who have kindly sponsored this topic. When used in combination with variable speed technology, like the VFDs we’re going to cover in this article, they make your entire HVAC unit…
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Pulley Belt Calculations
As shown in the image below, an induction motor is connected via a belt to drive two pulleys which will move centrifugal fan. This is this fairly typical of what you might find to in an Air Handling Unit or AHU. You’d also have this set up on some pumps and also some conveyor belts. The two things…
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Star-Delta Starter in Induction Motor
A star-delta starter is a very common type of starter and is widely used compared to other types of induction motor starters. The star-delta starter is used for the squirrel cage induction motor that is designed to run on delta-connected stator winding. The connection diagram of a start-delta starter for a three-phase induction motor is shown in the figure…
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Shaded Pole Motor
A shaded pole motor or shaded pole induction motor is a type of single-phase induction motor usually used for the lower ratings. It is a simply self-starting single-phase induction motor with a pole shaded by a copper ring. The copper ring is known as the shaded ring. The shaded ring acts as an auxiliary winding (secondary winding). This motor…
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Why Single Phase Induction Motor is not Self Starting?
It has only one phase still it makes the rotor to rotate, so it is quite interesting. Before that, we need to know why a single phase induction motor is not a self-starting motor and how we overcome the problem. We know that the AC supply is a sinusoidal wave and it produces a pulsating…
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