Wolfspeed SpeedVal MOD-MB-3P-0900V-40A Series User Manual page 47

Figure 36 shows an example turn-on energy measurement. The cursors are set at the 10% boundary points,
resulting in an E measurement of 89.12uJ.
ON
To measure the turn-off switching energy (E
Figure 37 shows the zoomed turn-off switching waveforms.
E is defined as the integral of the instantaneous power beginning when V
OFF
and ending when I has fallen to 10% of the target current.
DS
Figure 37 shows an example turn-off energy measurement. The cursors are set at the 10% boundary points,
resulting in an E measurement of 16.95uJ.
OFF
PRD-08611 REV. 1, June 2024
© 2024 Wolfspeed, Inc. All rights reserved. Wolfspeed® and the Wolfstreak logo are registered trademarks and SpeedVal™ and
the Wolfspeed logo are trademarks of Wolfspeed, Inc. Other trademarks, product and company names are the property of their
respective owners and do not imply specific product and/or vendor endorsement, sponsorship or association.
Figure 36: Zoomed in view of turn-on waveforms
), the user must zoom in on the waveform at the turn-off event.
OFF
MOD-MB-3P-0900V-40A SpeedVal™ Kit Three-Phase Motherboard User Guide
is at 10% of the DC bus voltage
DS
47