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12MBI100VN-120-50 Datasheet PDF : 6 Pages
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(a) Solder pin
Fig.7 Terminal shape
(b) Press-fit pin
PC-Pack3) was selected for the newly developed IGBT
module for A-NPC circuits. As a result, the package
has the following characteristics.
(a) Main terminals P, M, N
Layout allows for easy placement of snubber
capacitors (between P-M, between M-N) to reduce
surge voltage (see Fig. 6)
(b) Terminal shape
2 types of terminal shapes (solder pin, press-fit
pin) can be selected according to customer needs
(see Fig. 7)
(c) Environmentally friendly
Lead-free and compliant with RoHS directive*3
3. Power Dissipation
Figure 8 compares the power dissipation per phase
of a conventional 2-level inverter, an NPC 3-level in-
verter and an A-NPC 3-level inverter when operating
under the same conditions.
The power dissipation was computed with the V
Series ratings of 100 A/1,200 V (EconoPIM™ 3) for the
conventional 2-level inverter and using the V Series
ratings of 100 A/600 V (EconoPIM™ 3) for the NPC
3-level inverter. Operating conditions for the 20 kVA
inverter were fc = 7 kHz, DC voltage = 700 V, and output
current = 30 A (rms). As a result, the A-NPC 3-level in-
verter exhibited the least power dissipation, 51% less
than the conventional 2-level inverter and 33% less
than the NPC 3-level inverter. Viewed individually,
these inverters have the following characteristics.
The 2-level inverter has the smallest conduction
loss since it has only one device that conducts current.
However, because the DC voltage is twice that of a
3-level inverter, switching loss accounts for 76.6% of
the total power dissipation.
The NPC 3-level inverter has the largest conduc-
tion loss since there are two conducting devices in each
current flow path. With three levels, however, the DC
voltage is halved and the switching loss is less than
half that of a 2-level inverter. Consequently, the con-
duction loss accounts for 54.8% of the power dissipa-
tion per phase. As the carrier frequency decreases,
*3: RoHS directive: European Union (EU) directive on re-
striction of the use of certain hazardous substances in
electrical and electronic equipment
160
147.3
20 kVA inverter
140
Switching loss
fC= 7 kHz, VDC= 700 V,
IO (RMS value) = 30 A
120
108.1
100
112.9
(76.6 %)
48.9
80
(45.2 %)
72.3
60
34.9
40
Conduction
loss
59.2
(48.2 %)
20
34.4
(23.4 %)
0
2-level
(54.8 %)
NPC 3-level
37.5
(51.8 %)
A-NPC 3-level
inverter
inverter
inverter
Fig.8 Comparison of power dissipation for various inverters
400
350
400
250
200
150
100
50
0
0
2-level inverter
NPC 3-level
inverter
A-NPC 3-level
inverter
5
10
15
20
25
30
Carrier frequency fC (kHz)
Fig.9 Carrier frequency dependence of power dissipation
conduction loss accounts for a higher percentage of to-
tal power dissipation.
With an A-NPC 3-level inverter, because an RB-
IGBT has larger conduction loss than an ordinary
IGBT, the conduction loss is 8.7% larger than that of
a 2-level inverter, but can be reduced to about 37%
less than an NPC 3-level inverter. On the other hand,
the switching loss is smaller as in the case of the NPC
3-level inverter. As a result, in contrast to the loss in
the NPC 3-level inverter, the percentages of conduction
loss and switching loss become equal, and even if the
carrier frequency changes, the power dissipation never
exceeds that of the NPC 3-level inverter.
Figure 9 shows the carrier frequency dependence of
power dissipation. In the region of carrier frequencies
of 5 kHz or higher, the power dissipation is less for a
3-level inverter than a 2-level inverter. In the region
of carrier frequencies lower than 5 kHz, the 2-level in-
verter appears to have less power dissipation, but the
noise filter attached to the inverter apparatus is larger
for the 2-level inverter than a 3-level inverter, and as a
result, the total loss (power dissipation including fixed
loss and filter loss) generated by the entire inverter ap-
paratus, the 3-level inverter has less power dissipation.
IGBT Module Series for Advanced-NPC Circuits
53
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