Compressor high-frequency harmonic torque compensation method, compressor controller and air conditioner

Abstract

The invention discloses a compressor high-frequency harmonic torque compensation method, a compressor controller and an air conditioner. The method comprises the steps of acquiring a vibration amplitude of the compressor in operation; when the vibration amplitude of the compressor is higher than a first preset vibration value, acquiring a load torque harmonic wave and an output electromagnetic torque harmonic wave of the compressor in the current operation working condition, determining a harmonic compensation order according to the load torque harmonic wave and the output electromagnetic torque harmonic wave; determining a harmonic frequency which corresponds with the harmonic compensation order, stacking a sine electromagnetic torque with a corresponding frequency into an output electromagnetic torque according to the harmonic frequency, adjusting a harmonic phase which corresponds with the sine electromagnetic torque according to a multiple-iteration method; and when a fact that the harmonic amplitude which corresponds with the output electromagnetic torque with the stacked sine electromagnetic torque reaches a highest value, recording the harmonic wave which corresponds with the current sine electromagnetic torque as an optimal compensation phase, and performing compensation on the high-frequency harmonic torque of the compressor according to an optimal compensation phase. The compressor high-frequency harmonic torque compensation method, the compressor controller and the air conditioner realize high-frequency harmonic torque compensation of the compressor.

Description

technical field [0001] The invention relates to the technical field of refrigeration, in particular to a compressor high-frequency harmonic torque compensation method, a compressor controller and an air conditioner. Background technique [0002] The permanent magnet synchronous motor in the compressor generally tracks all the load torque applied to the motor shaft, and then outputs an electromagnetic torque corresponding to the load torque. However, when the high-frequency harmonic component in the load torque is large, the electromagnetic torque output by the motor cannot track the load torque well due to the limitation of the bandwidth of the control system in the existing permanent magnet synchronous motor, which will The difference between the high-frequency harmonic components of the electromagnetic torque and the load torque produces a periodic pulsating torque, which excites vibrations, eventually threatening the pipeline safety of the air conditioning system and gene...

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Problems solved by technology

[0003] The main purpose of the present invention is to propose a compressor high-frequency harmonic torque compensation method, compressor controller and air conditioner, aiming to solve the problem of the difference between the electromagnetic torque output by the motor and the high-frequency harmonic component of the load torque The periodic pulsating torque excites the vibration, thus generating the problem of noise

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