SU1536432A1 - Training transformer - Google Patents

Abstract

The invention relates to textbooks on electrical engineering and can be used to study the course of transformation of alternating current. The aim of the invention is to demonstrate a spiral-free transformer. The training transformer contains primary and secondary windings made of superconducting material and having the form of a tube with a core whose length is equal to the width of a closed magnetic circuit. 1 il.

Description

The invention relates to educational aids in electrical engineering and can be used during the course of an alternating current transformation.

The purpose of the invention is the expansion of demonstration capabilities due to the demonstration of the transformation with the same number of turns of the windings and the demonstration of a winding transformer.

The drawing shows a diagram of a transformer.

Usually a transformer consists of a closed ferromagnetic magnetic conductor, on which two or more windings are wound, an alternating current is applied to the primary winding consisting of W turns, then an alternating current is generated in the winding creating an alternating magnetic flux P in the ferromagnetic core. Changes The flux causes induction EMF in all windings. All the turns of the primary and secondary windings are permeated by the same magnetic flux. This means that in each turn of all windings

the transformer is induced by the same EMF and the voltage at the ends of the windings is proportional to the number of turns in them:

(L

Have

U ft

W (W

where u

and „w ,, wa p the voltage of the primary and secondary windings; the number of turns in the windings; transformation ratio.

ate

SAR

In a transformer containing a magnetic conductor, the primary and secondary windings and the magnetic conductor of a ferromagnetic material, on one of the windings (for example, the secondary one) contains m turns of the magnetic conductor. Here, i the magnetic flux penetrating each turn of the primary and secondary windings is identical and proportional to the number of turns of the core covered by each winding. In this case, the voltage transformation ratio is calculated by the formula

go

Yu

W

n wT

where m - 1

m - 1 m

the number of turns of the magnetic core covered by the primary winding; m is the number of turns covered by the secondary winding.

The training transformer contains input 1 and output 2 windings. The magnetic core of ferromagnetic material 3 is a short-circuited coil with two turns. The wire of the secondary winding 2 is passed through two turns, the wire of the primary winding is passed through one turn of the magnetic core 3.

In the case of use in the windings of superconducting materials, the primary and secondary windings have the form of a tube with a core electrically connected to one side.

The proposed design of the transducer used in the educational device reveals new possibilities of using electromagnetic induction and demonstrates the possibility of applying the Meissner effect in electrical engineering when using superconducting windings.

Claims (1)

Invention Formula A training transformer containing a closed magnetic conductor and primary and secondary windings placed on it on different sides, the first of which is connected to an alternating voltage source, characterized in that, in order to expand the didactic possibilities by demonstrating a winding transformer, the primary and secondary windings are made of superconducting material and have the form of a tube with a core whose length is equal to the width of the magnetic circuit, while the tube and the core are electrically connected on one side among themselves, and the magnetic core has two or m turns on the secondary winding,