THYRISTOR STRUCTURE AND SPECIFICATION
Eric CanniffCody Johnson
INTRODUCTION AND OUTLINE
History Basic Characteristics Structure Specifications Applications
HISTORY William Shockley proposed the concept of the
Silicon Controlled Rectifier (SCR) in 1950 Engineers at Bell Labs supported this idea In 1956 Under the supervision of Gordon Hall,
General Electric created an SCR Soon became a commercial product, due to
the efforts of Frank W. Gutzwiller Predecessor was a gas filled tube device
called a Thyratron
BASIC CHARACTERISTICS Thyristor is composed of four alternate layers
of N-type and P-type material
TWO TRANSISTORS EQUIVALENT CIRCUIT
I-V CHARACTERISTICS
STRUCTURE
BILATERAL STRUCTUREAllows for positive and negative voltages to pass
TRIAC STRUCTURE
MOS TURN-OFF THYRISTOR
MOS GATED THYRISTOR V Groove Mos gated thyristor
LIGHT TRIGGERED THYRISTOR (LTT) Have an optically sensitive region in the gate Used for protection of control circuit for HVDC Usually triggered by Infrared Light
SPECIFICATIONS 50A Medium Power Thyristor
APPLICATIONS DC transmission of
power from Manitoba Hydro dams
Heart of High-voltage direct current conversions now a days
SUMMARY AND CONCLUSION Thyristor is a 4-layered alternating pn-
material device Semiconductor Controlled Rectifier (SCR) Needs only a small gate pulse to stay on 4 Basic structures Mainly used in high voltage application
REFERENCE SLIDE Neamen, Donald A. Semiconductor Physics
and Devices. Fourth ed. New York: McGraw-Hill, 2012. 691-701. Print.
Vishay, . Medium Power Thyristors. N.p., 19 Sept. 2008. Web. 27 Apr. 2013. <http://www.vishay.com/docs/93711/50ria.pdf>.
Sentaurus Technology Template: Light-Triggered Thyristor. N.p., 2013. Web. 28 Apr. 2013. <http://www.synopsys.com/Tools/TCAD/Pages/thyristor.aspx>.
KEY CONCEPTS Structures Switching Characteristics Triggering Types Applications
Top Related