1 / 11

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

Anglicky v odborných předmětech "Support of teaching technical subjects in English “. Tutorial : Mechanic - electrician Topic : Basics of electrical engineering the 2nd. Year The m easuring system 1 Prepared by: Ing. Jiří Smílek.

dorjan
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. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Anglicky v odborných předmětech"Support ofteachingtechnicalsubjects in English“ Tutorial: Mechanic - electrician Topic: Basicsofelectricalengineering the 2nd. Year Themeasuringsystem1 Prepared by: Ing. Jiří Smílek Projekt Anglicky v odborných předmětech, CZ.1.07/1.3.09/04.0002 je spolufinancován Evropským sociálním fondem a státním rozpočtem České republiky.

  2. The measuring system • System with a rotating magnet • Construction: • In the hollow coil is a pivotally positioned magnet. • Attached to the shaft are a needle and spring, which are used for power supply and also holds a pointer to zero .

  3. System with a rotating magnet • Principal function: • An electric current passes through the stationary coil creating an electric current. • A permanent magnet makes it so that it’s induction curve undergoes the same sense as the induction curve of magnetic field coils.

  4. Electro-magnetic system • Features: • Measure the DC voltage and current, • Little accuracy • Sensitive to external magnetic field; • Advantage: • Simplicity. • Application: • The electrical equipment of motor vehicles

  5. Measuring system • Electro-magnetic system – with a rotating coil • Construction: • In the cavity between the magnetic pole attachments is a magnetic coil pivotally placed in an aluminum frame. • Attached to the shaft are a needle and spring, which are used for power supply and also holds a pointer to zero.

  6. Electro-magnetic system • Principal function: • Passing a current through the coil creates a magnetic field, which tries to turn the coil so that the direction of the magnetic flux coincides with the direction of the magnetic flux of the permanent magnet.

  7. Electro-magnetic system • Properties: • Measure the DC voltage and current, • The scale is linear, • Magnetic damping (eddy currents in an aluminum roller) • High accuracy (0,1 and0,2%), • Low self consumption (8 - 3 W), • Sensitivity of the gross mechanical and electrical usage, • Strong influence of temperature • Application: • DC voltmeters and ammeters and indirectly for the measurement of other variables.

  8. Electro-magnetic systems types of devices • Electro-magnetic device – with a rotating coil • measurement of DC voltage and current • Electro-magnetic ratiometric device • measurement of resistance • Electro-magnetic device with a built in insulated thermocouple • measurement of non-sinusoidal currents • Electro-magnetic device with an integrated regulator • measurement of sinusoidal alternating currents

  9. Activity for students - questions • Name the well-known measuring systems • Describe the construction 1. system • Describe the principal function1. system • Draw the type of measuring device 1. system • Name the application of the system1. system

  10. Activities for students - questions • Describe the construction 2. system • Describe the principal function 2. system • Draw the type of measuring device 2. system • Name the application of the system2. system

  11. Bibliography • Mužík, J. Management ve vzdělávání dospělých. Praha: EUROLEX BOHEMIA, 2000. ISBN 80-7361-269-7. • Operační program Vzdělávání pro konkurenceschopnost, ESF 2007 – 2013. • Available at: http://www.msmt.cz/eu/provadeci-dokument-k-op-vzdelavani-pro-konkurenceschopnost • Electrical Measurement textbooks– Ing. Pavel Vylegala, SŠE Ostrava, 2006 • Electrical Measurement textbooks– SNTL, 1981

More Related