Infineon iMOTION EVAL-M3-IM564, User Manual, Page: 32 / 47

User Manual 32 of 47 Revision 1.4
2020-07-16
EVAL-M3-IM564 User Manual
iMOTION ™ Modular Application Design Kit
Hardware description of EVAL-M3-IM564
= +
Thus we get the following formula:
=
∆
.
=
−
×
According to the test set-up, the test results are shown in Figure 30 below. The IPM case temperature is
detected for about one hour, until the temperature is stable.
Figure 30 Heatsink thermal testing result
Therefore, the final case-to-ambient resistance value is roughly:
= 2.4 ℃/
Please note that thermal resistance is calculated with a fan voltage of 10 V. For higher power capability, fan
input voltage can be increased up to 15 V by U10 (IFX91041EJV, DC-DC voltage regulator), which controls the
fan voltage based on the PFC current sensing op-amp output voltage.
4.4.2 System power output capability
In order to test the total ouput power capability of the MADK system as in Figure 2, the DCB case temperature is
tested with different MADK output power.
Test conditions are: ambient temperature Ta=25
℃
, AC input voltage is VAC=220 V/50Hz, bus voltage is
VDC=380 V, PFC PWM frequency is 50 kHz and inverter frequency is 6 kHz.
Figure 31 MADK ouput power capability test result