Rotary vibration inhibition method and device of compressor and compressor control system

Abstract

The invention discloses a rotary vibration inhibition method and device of a compressor and a compressor control system. The method comprises the following steps of obtaining the target rotating speed and the feedback rotating speed of the compressor, and calculating the fluctuating rotating speed of the compressor according to the target rotating speed and the feedback rotating speed; obtaining a torque compensation basic signal of the compressor according to the fluctuating rotating speed; calculating the fluctuating degree of the compressor according to the fluctuating rotating speed, and obtaining the torque compensation gain of the compressor according to the preset rotating speed fluctuating tolerance and the fluctuating degree; calculating the torque compensation quantity of the compressor according to the torque compensation basic signal and the torque compensation gain; overlapping compensation current corresponding to the torque compensation quantity to q-axis given current of the compressor so as to control the compressor. The method has the advantages that the rotating vibration of the compressor can be reduced in a self-adapting way according to the fluctuating rotating speed; in addition, simplicity, reliability and high robustness are realized; in addition, the result is irrelevant to concrete parameters of the compressor; the universality is high; the realization is easy.

Description

technical field [0001] The invention relates to the technical field of compressors, in particular to a method for suppressing the rotary vibration of a compressor, a device for suppressing the rotary vibration of a compressor, and a compressor control system. Background technique [0002] In the fields of refrigeration equipment such as air conditioners and refrigerators, variable frequency drive compressors are more and more widely used, and there is a tendency to gradually replace the original fixed speed compressors. [0003] However, due to the principle of refrigerant compression, the volume and pressure changes of the suction chamber and the discharge chamber are not smooth within a mechanical cycle. For the compressor, a load disturbance with a cycle of mechanical rotation will be generated. , the disturbance will cause the cylinder of the compressor to produce a tangential vibration with the same frequency, which is called rotary vibration. [0004] Because the freq...

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Problems solved by technology

[0004] Because the frequency of rotary vibration is very close to the resonance frequency of the refrigeration equipment, it is harmful, especially for small and medium power single rotor compressors.

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