V-I Characterstics of IGBT

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Aim

To Study and verify VI characteristic of IGBT

Apparatus required

VI Characteristics of IGBT kit

☞Patch cards.

☞Power card.

Circuit Diagram for V-I Characterstics of IGBT

V-I Characterstics of IGBT

Mimic Diagram for V-I Characterstics of IGBT

V-I Characterstics of IGBT

Procedure

Experiment Steps

Transfer Characteristics

☞Connections are made as shown in the circuit diagram.

☞Switch on kit observe whether meter are reading 0.

☞Set both voltages to minimum position, and then switch on SPDT.

☞Increase VCE voltage to maximum position.

☞Now slowly increase the voltage across VGE and note down the VGE and IC value and plot graph.

Note: IGBT turns on around 4.3V.

☞Repeat from step 2 for another value of drain voltage VDS.

Note: 

If the connections are made wrong the kit may get damaged. Please switch off the kit when not in use.

Tabulation

VCE= ………………………

S.No.VGE(V)IC(mA)
   

Model Graph

model-graph-for-transfer-characteristics-of-igbt.jpg (233×223)

Output Characteristics

☞Connections are made as shown in the circuit diagram.

☞Switch on kit observe whether meter are reading 0.

☞Set both voltages to minimum position, and then switch on SPDT.

☞Increase VCE voltage to maximum position.

☞Now slowly increase the voltage across VGE at certain voltage IGBT is turned on stop varying the voltage at that point.
Note: IGBT may turn on around 4.3V.

☞Then reduce the voltage VCE to minimum position, don’t vary the VGE and Switch off SPDT.

☞Now after few seconds switch on SPDT then note down the readings.

☞Now vary VCE voltage slowly, correspondingly note down the VCE and IC readings and plot the graph.

☞Repeat from step 2 for another value of gate voltage VGE.

Note: 

If the connections are made wrong the kit may get damaged. Please switch off the kit when not in use.

Tabulation

VGE= ………………………

S.No.VCE(V)IC(mA)
   

Model Graph

model-graph-for-output-characteristics-of-igbt

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