Compressor map

[yunhuali]

Hi, I have a question about the compressor map given by the manufacturer.
This map is usually given in a table under different evaporating pressure and condensing pressure. If the compressor speed varies from 100% to 50%, can we continue to use this map?

I did an experiment and found that under lower speed, the compressor power is lower than the number given by the map.

P.S. It is a scroll compressor.

How can I use this map under lower speed conditions?
Thanks you !

[chemi-cool]

If the compressor is designed for working with frequency inverter, then the manufacturer [of the compressor] should have the map you are looking for.

[yunhuali]

Thank you for your reply.
However, for an existing scroll compressor, is there any way to convert these data to that under partial speeds?
Or only experiments can answer this question?
Thanks

[NoNickName]

No, there is no way to obtain the envelope for different speeds, unless released by the manufacturer.