Hello, does anyone have experience with the P76 drive and an induction machine designed for 87Hz operation (delta/star - 230/400V)? Specifically, I’m looking for advice on autotuning for this type of drive. The machine is designed for 87Hz operation with a nominal winding voltage of 400V and is co…

OK, this is a never-ending discussion about the basics, while the question lies somewhere beyond. So, we can close it. Thank you.

Hi community, can someone help Michal ?

It seems that this issue has already been resolved (or canceled) Well, it is important to use the correct motor parameters and see how the motor is actually wired. Most motors are built for star-wiring, but many can then also be used in delta-wiring. However, the inverter then ‘sees’ a motor with …

Thanks Christoph, I marked your reply as a solution. Michal feel free to continue in this topic if need it.

Hello, The nameplate is fairly standard: [obrázok] The P76 in the 400V version has its nominal point set to 230V/50Hz. The motor is connected in delta (as I mentioned, the motor is designed for 400V, even though this is not indicated on the nameplate) I thought it could be solved by changing t…

so my settings would be: [image] e.g. we’ve got a 230V/50 Hz motor and the maximum speed is 87Hz@400V

OK, we can start with this setting, even though the nominal voltage and frequency could also be 400V and 87Hz. However, when useing your settings and motor are connected in delta and you perform autotuning, the motor exhibits unsteady behavior. You must perform autotuning with different nominal val…

[image] Michal Malek: even though the nominal voltage and frequency could also be 400V and 87Hz. I agree with you. 400V/87Hz are suitable, too. But then the question is what you insert for the power: a) the 1.7x by theory or b) the thermal limitation from manufacturer. So I prefer to insert t…

The result is that while there is a way to tune it, it is inconvenient from a practical standpoint. I believe there is a similar issue with the P3 feeding an induction machine, where autotuning must be performed in a star connection even though the drive operates in a delta connection. In both case…

yep, agree. but once you got the parameters tuned you can read them out and use them explicitely: [image] P3 is a different topic due to the completely different firmware.

Help with P76 Drive + 87Hz Induction Machine Autotuning

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christoph.hilchenbac (Christoph Hilchenbach) November 22, 2024, 3:00pm 3

@Michal_Malek Michal,

It would certainly be helpful if you could post the nameplate of the motor, a photo of the terminal box and your P76 settings.

Regards

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Help with P76 Drive + 87Hz Induction Machine Autotuning

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