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<Dual-In-Line Package Intelligent Power Module>
1200V Mini DIPIPM with BSD Series APPLICATION NOTE
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
=300V, V
CC
Rth(c-f)=0.3°C/W (per 1/6 module), P.F=0.8, 3-phase PWM modulation, 60Hz sine waveform output
8
7
6
5
4
3
2
1
0
0
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/
Publication Date: September 2015
=V
=15V, V
=Typ., Switching loss=Typ., Tj=125°C, Tf=100°C, ∆T(j-f)=25K Rth(j-c)=Max.,
D
DB
CE(sat)
5
Fig.3-2-2 Effective current-carrier frequency characteristics
Fig.3-2-3 Loss simulator screen image
PSS10S72FT
PSS05S72FT
10
15
fc(kHz)
PSS10S72FT
41
20
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