Multistage compressor unit and method for regulating such multistage compressor unit
AssigneeAtlas Copco Airpower, Naamloze Vennootschap
InventorKen Gustaaf Helena Verhaegen
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Abstract
The invention relates to a multistage compressor unit which comprises at least two different compressor elements (1 and 2) driven by means of separate electric motors (3, 4) with an adjustable speed, whereby the outlet (8) of a compressor element (1) of one stage connected to the inlet (10) of a successive compressor element (2) of a successive stage, characterized in that the electric motors (2, 4) are identical and therefore have approximately one and the same nominal capacity, whereas between each motor (3, 4) and the compressor element (1, 2) driven thereby, a gear transmission (13, 14) is provided.
Claims16
Multistage compressor unit comprising at least two different compressor elements and at least two separate electric motors with an adjustable speed, said compressor elements being driven by said electric motors;
- wherein the outlet of a compressor element (1) of one lower stage is connected to the inlet of a successive compressor element of a successive higher stage;
- and
- wherein the electric motors have approximately one and the same nominal capacity, and a gear transmission is provided between each motor and a respective one of the compressor elements.
Method for regulating a multistage and multi-element compressor unit having an electric motor per compressor element fed by a pertaining frequency regulator, said motors having the same nominal capacity, the method comprising the steps of:
- regulating the frequency and the speed separately per motor;
- and adjusting the speed ratio between the motors of the different stages.
Dependencies are inferred from the claim text.