<Dual-In-Line Package Intelligent Power Module>
1200V Mini DIPIPM with BSD Series APPLICATION NOTE
Publication Date: September 2015
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3.2.2 Temperature Rise Considerations and Calculation Example
Fig.3-2-2 shows the typical characteristics of allowable motor rms current versus carrier frequency under the
following inverter operating conditions based on power loss simulation results.
Conditions: V
CC
=300V, V
D
=V
DB
=15V, V
CE(sat)
=Typ., Switching loss=Typ., Tj=125°C, Tf=100°C,
∆
T(j-f)=25K Rth(j-c)=Max.,
Rth(c-f)=0.3°C/W (per 1/6 module), P.F=0.8, 3-phase PWM modulation, 60Hz sine waveform output
0
1
2
3
4
5
6
7
8
0
5
10
15
20
Io(
A
rm
s
)
fc(kHz)
PSS10S72FT
PSS05S72FT
Fig.3-2-2 Effective current-carrier frequency characteristics
Fig.3-2-2 shows an example of estimating allowable inverter output rms current under different carrier frequency
and permissible maximum operating temperature condition (Tf=100°C. Tj=125°C). The results may change for
different control strategy and motor types. Anyway please ensure that there is no large current over device rating
flowing continuously.
The inverter loss can be calculated by the free power loss simulation software is uploaded to the web site.
URL: http://www.MitsubishiElectric.com/semiconductors/
Fig.3-2-3 Loss simulator screen image
PSS10S72FT
