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Related Concept Videos

Energy Losses in Transformers01:21

Energy Losses in Transformers

In an ideal transformer, it is assumed that there are no energy losses, and, hence, all the power at the primary winding is transferred to the secondary winding. However, in reality,  the transformers always have some energy losses, and, hence, the output power obtained at the secondary winding is less than the input power at the primary winding due to energy losses.
There are four main reasons for energy losses in transformers.
The first cause can be  the high resistance of the copper windings...
Transformers01:26

Transformers

A device that transforms voltages from one value to another using induction is called a transformer. A transformer consists of two separate coils, or windings, wrapped around the same soft iron core. However, they are electrically insulated from each other.
The iron core has a substantial relative permeability. Therefore, the magnetic field lines generated due to the current in one winding are almost entirely confined within the core, such that the same magnetic flux permeates each turn of both...
Types of Damping01:20

Types of Damping

If the amount of damping in a system is gradually increased, the period and frequency start to become affected because damping opposes, and hence slows, the back and forth motion (the net force is smaller in both directions). If there is a very large amount of damping, the system does not even oscillate; instead, it slowly moves toward equilibrium. In brief, an overdamped system moves slowly towards equilibrium, whereas an underdamped system moves quickly to equilibrium but will oscillate about...
Magnetic Damping01:17

Magnetic Damping

Eddy currents can produce significant drag on motion, called magnetic damping. For instance, when a metallic pendulum bob swings between the poles of a strong magnet, significant drag acts on the bob as it enters and leaves the field, quickly damping the motion.
If, however, the bob is a slotted metal plate, the magnet produces a much smaller effect. When a slotted metal plate enters the field, an emf is induced by the change in flux; however, it is less effective because the slots limit the...
Transformers in Distribution System01:27

Transformers in Distribution System

Transformers in distribution systems can be broadly categorized into distribution substation transformers and other distribution transformers. They are crucial for stepping down high transmission voltages to levels suitable for distribution and end-user applications.
Distribution substation transformers come in various ratings and typically use mineral oil for insulation and cooling. To prevent moisture and air from entering the oil, some transformers use an inert gas like nitrogen to fill the...
Types Of Transformers01:16

Types Of Transformers

Transformers can provide desired voltages to a circuit by modifying the number of turns in the secondary windings.
If the ratio of the number of turns in the secondary winding to that of the primary winding is greater than one, then the transformer is said to be a step-up transformer. In a step-up transformer, the voltage at the secondary winding is greater than the voltage applied at the primary winding.
However, if this ratio is less than one, the transformer is said to be a step-down...

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Related Experiment Videos

Note: Tesla transformer damping.

J L Reed1

  • 1Manhattan LCD, R&D Dept., 1007 Brielle Ave., Oviedo, Florida 32765, USA.

The Review of Scientific Instruments
|August 3, 2012
PubMed
Summary
This summary is machine-generated.

Heavy damping in two-winding Tesla pulse transformers stems from small primary inductances, causing significant inefficiency. Architectural changes are proposed to improve performance in these high-voltage pulse transformers.

Related Experiment Videos

Area of Science:

  • Electrical Engineering
  • High-Voltage Engineering
  • Pulse Power Systems

Background:

  • Tesla pulse transformers are critical for high-voltage applications.
  • Unexpected heavy damping has been observed in two-winding configurations.
  • Primary inductance is a key parameter affecting transformer operation.

Purpose of the Study:

  • To identify the cause of heavy damping in two-winding Tesla pulse transformers.
  • To quantify the performance loss associated with this damping.
  • To propose architectural modifications for loss mitigation.

Main Methods:

  • Analysis of transformer governing equations with added damping terms.
  • Experimental investigation using a spiral strip transformer.
  • Comparison of simulated and experimental data for 2- and 3-winding transformers.

Main Results:

  • Small primary inductances are identified as the cause of heavy damping.
  • A performance loss of up to 30% was demonstrated.
  • Damping terms in the governing equations explain the observed inefficiency.

Conclusions:

  • Small primary inductance, while necessary for operation, introduces significant inefficiency.
  • Architectural alterations are necessary to mitigate these losses.
  • Three-winding transformers show potential for improved performance compared to two-winding designs.