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Application Notes
9.5.3
Individual IGBT Losses vs Output Current
The table and charts below can be used for estimating individual IGBT losses as a function of cell output current.
Primary source values are used. Losses include conduction and switching losses for a single IGBT only. FWD losses
are neglected.
Iout
40/70A
25
22.0
23.0
50
53.0
52.0
75
92.0
86.0
100
140.0
126.0
125
196.0
171.0
150
261.0
223.0
175
280.0
200
343.0
225
250
275
9
300
325
350
375
400
425
450
475
Alternatively, individual IGBT losses can be estimated as follows:
40/70Acell:
Pigbt = 0.0068 x Iout ^2 + 0.72086 x Iout - 0.2
100A cell:
Pigbt = 0.00459 x Iout ^2 + 0.79381 x Iout + 0.53571
140A cell:
Pigbt = 0.00315 x Iout ^2 + 0.61521 x Iout - 0.17955
200A cell:
Pigbt = 0.00195 x Iout ^2 + 0.45098 x Iout + 8.51042
260A cell:
Pigbt = 0.00133 x Iout ^2 + 0.58138 x Iout + 6.65728
For total cell IGBT losses (FWD losses are neglected), multiply Pigbt by 4.
9-8
100A
140A
200A
260A
17.0
15.5
17.7
38.5
33.0
36.8
63.6
52.6
57.2
93.0
74.2
78.9
126.0
97.8
102.0
163.0
123.4
126.0
204.0
151.0
152.0
249.0
181.0
179.0
297.0
213.0
208.0
350.0
246.3
237.3
407.0
282.2
268.0
468.0
320.0
301.0
360.0
335.0
402.0
370.0
446.0
406.0
492.0
444.0
540.0
483.0
590.0
523.0
696.0
608.0
MicroHarmony Cell Sizes 40 - 260A Manual
Losses vs Output Current
40/70A
100A
700
650
600
550
500
450
400
350
300
250
200
150
100
50
0
0
50
100 150 200 250 300 350 400 450 500
Output Current, Arms
s
140A
200A
260A
19001467: Version 1.0
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