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Why does a screw air compressor produce loud noise during frequency ramp-up and ramp-down, only to become quieter once the frequency stabilizes?
When a screw air compressor operates under variable-frequency control, noise levels increase during frequency ramp‑up and ramp‑down but return to normal once the frequency stabilizes. This phenomenon is primarily influenced by electromagnetic harmonics, mechanical resonance, and airflow pulsations.…
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