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MCF8329A: Regarding the problem when starting motor rotation

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Part Number: MCF8329A

Hi the all of support team.

My customer has the problem when starting motor rotation.

e2e.ti.com/.../register20240229.zip

I share the waveform regarding drive node voltage & current & gate voltage & speed ref input and setting file(json file).

Yellow : Speed ref input

Green : Drive node voltage (Phase A)

Pink : Drive node voltage (Phase B)

Light blue : Drive node voltage (Phase C)

Red : Gate voltage (phase C on highside)

Orange : Gate voltage (phase C on lowside)

Purple : FG output

Light red(the bottom line) : nFault output

-Additional information
Maximum speed: 112Hz (24 pole pairs, 480rpm(max))
Speed reference input at startup: 1kHz (Duty 25%) constant
Motor maximum rated current: 7.5A

<question>
The ABN_SPEED error is detected and the motor rotation stops.
What are the possible causes?
I thought the handoff was not working properly, so I tried changing the handoff threshold, but it didn't work.

We appreciate it if you could give us some advise.

Best regards,

Higa


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