System Performance; Dv/Dt Test; Thermal Performance Test - Infineon EVAL-M7-HVMOS-INV User Manual

EVAL-M7-HVMOS-INV user guide
Evaluation power board with M7 connector

System performance

4 System performance
4.1

dv/dt test

The dv/dt is important for the motor control system. The motor application requires the switching dv/dt below
5 V/ns. This can improve motor-control reliability. But please note that lower dv/dt will increase the MOSFET
switching losses. The turn-on dv/dt of the EVAL-M7-HVMOS board is measured at 4.85 V/ns. Figure 19 depicts
the dv/dt test waveform.
V
DS
V
GS
Figure 19 EVAL-M7-HVMOS-INV dv/dt test waveform
4.2

Thermal performance test

For the EVAL-M7-HVMOS-INV power board thermal performance test, the input power and motor-phase current
were measured when the MOSFET case temperature was increased to 100℃. The power board was tested in
different carrier frequencies. The PWM frequency range is from 4 kHz to 16 kHz under testing conditions. Keep
in mind, however, that this power board can be run up to 20 kHz; the output power capability will drop down
accordingly. Figure 20 shows a thermal test snapshot at 220 V
power. The hot point of the power board is 101.4℃ when the room temperature is 23℃. Users can add a
heatsink or cooling fan to increase the board ouput power. Space for a heatsink has been reserved on the
board. If a heatsink is added, exercise caution when using a thermal pad.
Figure 20 Thermal test
User guide
input, 8 kHz carrier frequency, and 200 W input
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26 of 30 Revision 1.0
2021-06-28