Practical setup of power electronics lab power semicondutor devices [ scr, mosfet, igbt, gto,...
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Transcript of Practical setup of power electronics lab power semicondutor devices [ scr, mosfet, igbt, gto,...
Electrical Final Year 2014 Batch
PRACTICAL SETUP
OF
POWER ELECTRONICS LAB
CONTENTS
1) SCR
2) TRAIC
3) GTO
4) BJT
5) IGBT
6) MOSFET
7) R-FIRING CKT
8) RC-FIRING CKT
9) UJT-FIRING CKT
SILICON CONTROLLED RECTIFIER (SCR)
7000 v5000 Amp
V-I Characteristics of SCR
APPLICATIONS OF SCR :-
• Speed control for motors• Battery-charging regulator• Temperature controller circuit• Emergency-lighting system• Temperature control for electric hot plate• Dimmer switch for domestic lighting• Dimmer control for stage lighting.
Triac
1200 V1000 Amp
SYMBOL & LAYER DIAGRAM
V-I CHRACTERISTICS OF TRAIC
Applications of the TRIAC
The TRIAC as a bidirectional thyristor has various applications. Some of the popular applications of the
TRIAC are as follows:
(i) In speed control of single-phase ac series or universal motors.
(ii) In food mixers and portable drills.
(iii) In lamp dimming and heating control.
(iv) In zero-voltage switched ac relay.
GATE TURN OFF THYRISTOR
(GTO)5000 v3000 Amp
CIRCUIT SYMBOL AND STRUCTURE OF GTO
V-I CHRATERISTICS OF GTO
GTO Applications
• Counters• Pulse generators• Oscillators• Voltage regulators
Bipolar Junction Transistor(BJT)
1400 v400 Amp
LAYER DIAGRAM
V-I CHARACTERISTIC OF BJT
Insulated Gate Bipolar Transistor (IGBT) 1200 v
500 Amp
Vertical cross section of an IGBT
V-I characteristics of an IGBT
APPLICATIONS:
The IGBT is mostly used in high-speed switching devices. They have switching speeds greater than those of bipolar power transistors.
Robot welding machine.
Uninterruptible Power Supply.
Motor control.
Metal Oxide Semiconductor Field Effect Transistor (MOSFET )
1000 v50 Amp
Schematic construction of a MOSFET
V-I CHARATERISTIC OF MOSFET
Applications of Power Devices
R-FIRING CIRCUIT
R-C FIRING CIRCUIT
UJT TRIGRING CIRCUIT
UJT-Firing Circuit&
Electronic Fan Regulator
THE ENDTHANK YOU