Thyristors
Characteristics   Hysteresis character    ◦ It latches to its last position, on or off    ◦ Example, physical s/w – you s...
Examples of Thyristors Shockley diode DIAC SCR (silicon controlled rectifier) TRIAC Opto thyristors
Shockley Diode Not to be confused with schottky diode It is a four layer device   Also known as PNPN diode.
The Working of the ShockleyDiode   The four PNPN can be simplified to    two set of separate transistors, PNP    and NPN....
With high voltage, one of the transistor will be turnedon causing the other to be on. Once on, thetransistors latched. To ...
DIAC Shockley diode works with DC. For AC, 2 shockleys are joint. The result is shown in the lower image
SCR Silicon Controlled Rectifiers or  thyristors. Used to rectify AC and control the  power output.
TRIAC Dimmer
TRIAC FOR AC
Opto- tyristors
RESOURCESMy Blog             CAA UK Recommended Books            Title                      Author            Aircraft Ele...
Upcoming SlideShare
Loading in...5
×

Module 4 thyristors

796

Published on

This slide is part of the material used to prepare the students for Module 4 of EASA part 66 examination for License category B1

0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total Views
796
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
102
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

Transcript of "Module 4 thyristors"

  1. 1. Thyristors
  2. 2. Characteristics Hysteresis character ◦ It latches to its last position, on or off ◦ Example, physical s/w – you s/w it on, it remains on. May be viewed as 2 transistors working in pair. Constructed from bipolar junction technology.
  3. 3. Examples of Thyristors Shockley diode DIAC SCR (silicon controlled rectifier) TRIAC Opto thyristors
  4. 4. Shockley Diode Not to be confused with schottky diode It is a four layer device Also known as PNPN diode.
  5. 5. The Working of the ShockleyDiode The four PNPN can be simplified to two set of separate transistors, PNP and NPN. P N P N P N
  6. 6. With high voltage, one of the transistor will be turnedon causing the other to be on. Once on, thetransistors latched. To turn off, the voltage must bereduced to cause the current to drop below minimum
  7. 7. DIAC Shockley diode works with DC. For AC, 2 shockleys are joint. The result is shown in the lower image
  8. 8. SCR Silicon Controlled Rectifiers or thyristors. Used to rectify AC and control the power output.
  9. 9. TRIAC Dimmer
  10. 10. TRIAC FOR AC
  11. 11. Opto- tyristors
  12. 12. RESOURCESMy Blog CAA UK Recommended Books Title Author Aircraft Electricity and Eisman 0-02-801859-1 Electronics Art of Electronics Horowitz 0-521-37095-7 Horowitz /Hill /Hill Elements of Hickey/ 0070286957 Electronics Villines Modern Aviation Helfrich 0-13-118803-8 Electronics Micro Electronics in E Pallet 0-273-08612-X Aircraft systems
  1. A particular slide catching your eye?

    Clipping is a handy way to collect important slides you want to go back to later.

×