Anglicky v odborn ch p edm tech support of teaching technical subjects in english
This presentation is the property of its rightful owner.
Sponsored Links
1 / 10

Anglicky v odborných předmětech "Support of teaching technical subjects in English“ PowerPoint PPT Presentation


  • 53 Views
  • Uploaded on
  • Presentation posted in: General

Anglicky v odborných předmětech "Support of teaching technical subjects in English“. Tutorial : Mechanic - electrician Topic : Technical training II. class Passive components – transformers Prepared by: Melichařík Lubomír.

Download Presentation

Anglicky v odborných předmětech "Support of teaching technical subjects in English“

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Anglicky v odborn ch p edm tech support of teaching technical subjects in english

Anglicky v odborných předmětech"Support of teaching technical subjects in English“

Tutorial: Mechanic - electrician

Topic: Technicaltraining

II. class

Passivecomponents – transformers

Prepared by: Melichařík Lubomír

Projekt Anglicky v odborných předmětech, CZ.1.07/1.3.09/04.0002

je spolufinancován Evropským sociálním fondem a státním rozpočtem České republiky.


Passive components transformers

PASSIVE COMPONENTS - TRANSFORMERS

Transformer

Is a non-rotating electric machine

-allows you to transfer electrical energy from one circuit to another through mutual electromagnetic induction

-used mostly to convert AC voltage (e.g. from low voltage to high), or for galvanic isolation circuits.


Transfor mer

TRANSFORMER

Electrotechnical schematic symbols

  • Schematic symbol for a transformer

    with an air core

  • Schematic symbol for a transformer

    with a magnetic core

  • Schematic symbol for a transformer

    with a ferrite core

  • Schematic symbol for a transformer

    with a tap


Transform er

TRANSFORMER

  • Electrotechnical schematic symbols

  • Schematic symbol for a transformer

    with multiple windings

  • Schematic symbol for a single-phase

    transformer


Basic principle of a transformer

BASIC PRINCIPLE OF A TRANSFORMER

  • The transformer is an AC converter

  • -it consists of three main parts: the coil, the magnetic circuit, the insulation system.

  • -primary winding is used to convert electrical energy into magnetic. Passing a current creates a magnetic flux Φ [Fí].

  • -this flux is guided in the magnetic circuit (core) to the secondary coil.

  • -in the secondary coil according to the principle of Faraday’s law of induction a voltage is induced

  • -therefore, the transformer works only on alternating or pulsating current because the DC does not change the magnetic flux (i.e. constant flux derivative is zero) and the secondary winding no longer has a voltage.


Principle of a transformer and winding

PRINCIPLE OF A TRANSFORMER AND WINDING

  • -winding of small transformers are made of painted (enameled) wires of various diameters

  • -the coil is wound onto the coil body (skeleton) thread after thread

  • -single-layer winding is interspersed with insulation. The surface of the coil is insulated with cardboard or linen. It impregnates the vacuum pressure impregnation

  • -voltage control taps on the second winding


Autotransform er

AUTOTRANSFORMER

  • Autotransformers

  • -are transformers, whose primary and secondary winding use the same coil

  • -from a mechanical point of view, the coil is on an iron core, with taps for the primary and secondary voltages

  • -a disadvantage is, that when we come to construct a galvanic isolation of primary and secondary voltages

  • -a secondary winding tap can be realised by moving the slider

  • -used in electrical laboratories and in traction drive rail vehicles


Activities for students mandatory slide task test questions

Activities for students – mandatory slideTask, test, questions … .

  • Draw the schematic symbol for a transformer.

  • Draw and explain the principle of an autotransformer


Activities for students mandatory slide task test questions two slides are better

Activities for students – mandatory slideTask, test, questions … . Two slides are better.

  • Divide the transformers

  • According to the number of phases

  • -

  • -

  • -

  • According to the design of the magnetic circuit

  • -

  • -

  • -

  • According to the uses

  • -

  • -

  • -

  • According to the number of windings

  • -

  • -

  • -


Bibliography

Bibliography

  • Václav MalinaPoznáváme elektroniku I.

  • Adrian Schommers Elektronika tajemství zbavená.

    ISBN 3-92608-32-5


  • Login