Abstract: Studied and analyzed the basic mechanism of vibration and noise generation of single cylinder compressors above rated frequency. Based on mechanism analysis and theoretical derivation, the current harmonic suppression technology in the field of servo electronic control is introduced into the automatic compensation scheme for vibration harmonics of single cylinder compressors operating at frequencies higher than the rated frequency. Based on the actual load characteristics and driving system characteristics of the compressor, a thorough analysis of the vibration harmonic suppression method system function and control block diagram is conducted, and a specific design method for optimizing control parameters is further provided. Finally, using Simulink software, a model of the automatic compensation scheme for current harmonics above the rated frequency of a single cylinder compressor was designed. The effectiveness of the automatic compensation scheme for current harmonics above the rated frequency of a single cylinder compressor was verified, in simulation, the FFT result of third harmonic decline from 36.8 dB to 11.5 dB, comparison of simulation results and experimental test data; And experimental verification was conducted to clarify the effectiveness of the algorithm.

Key words: Single cylinder compressor, High frequency vibration, Harmonic suppression, Automatic compensation