Thyristor Structure and Specification
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Transcript Thyristor Structure and Specification
THYRISTOR STRUCTURE AND
SPECIFICATION
Eric Canniff
Cody 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 STRUCTURE
Allows 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/thy
ristor.aspx>.
KEY CONCEPTS
Structures
Switching Characteristics
Triggering
Types
Applications