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Modulation issues with XM3 Inverter CAN source code

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untypical_power_guy
untypical_power_guy Contributor Level 1
edited August 2023 in General

Hi, I'm using the crd300da12e xm3 inverter for a research project. I modified the source code updatePWM() in "XM3 Inverter CAN Example Source Code V1_3" to add harmonics in phase current. It works on phase B and C output, but phase A output ignores the injection. During the CCS debug, I could see the phase A PWM reference updates with the injection but the phase A voltage only contains the fundamental. I'm wondering if there is any firmware module prevents non-sinusoidal modulation passing to phase A gate drivers. Thanks.

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  • Forum_Moderator
    Forum_Moderator Wolfspeed Employee - Contributor Level 5
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    Thank you for your post, it has been approved and we will respond as soon as possible.

  • JHayes
    JHayes Wolfspeed Employee - Contributor Level 3
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    There is nothing in firmware that prevents non-sinusoidal modulation. If you can share the waveforms or what has been modified, I'd be happy to help troubleshoot the issue.

  • TBhatia
    TBhatia Wolfspeed Admin - Contributor Level 5
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    Hi, I hope that this answered your question. I will close this discussion for now but if you have a follow up question, please "Start a New Discussion" and we would be glad to support you further.

This discussion has been closed.