Wire it for the voltage corresponding to your grid voltage. That is the voltage (or, rather V/Hz) that your VFD will deliver. Not mentioning some special possibilities that exist.
There are a lot of inter-dependent parameters. What are the motor nameplate voltages in star and delta, and what is the VFD output voltage? Also what is the VFD maximum output frequency and what is the motor nominal frequency (or rated speed)?
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If we learn from our mistakes I'm getting a great education!
Unless you have something special, six-lead motors (suitable for star-delta starter) are designed to run in delta. Star connection is only used during starting on a star-delta starter.
If so, you want to wire it in delta for VFD application.
If the original internal connections are not altered, the fig. 2 in the attached pdf would apply for a delta connection. The dark connectors are shorting links.
I'll politely disagree with Rafiq, at least for motors in the IEC world. Below 7.5kW motors are typically 230V delta / 400V star. Above 7.5kW motors are typically 400V delta / 690V star.
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If we learn from our mistakes I'm getting a great education!
I would think dual voltage rating would be posted on the name plate. Perhaps that is what the OP meant by star-delta motor, then what you said is absolutely correct.
If the name plate indicates single voltage and the motor has six leads, it is usually meant for delta. At least that what I had come across in six years of experience in the IEC/India in the 80's. I thought by star-delta motor the OP meant a motor used on a star-delta starter, which probably was not correct.
