Method and device for determining control compensation angle based on low-frequency vibration of inverter air conditioner

Abstract

The invention provides a method and device for determining a control compensation angle based on the low-frequency vibration of a variable frequency air conditioner. The method comprises the followingsteps: determining a phase difference and current compensation amplitude of the compressor of the variable frequency air conditioner; measuring the vibration amplitude of each frequency point in thelow frequency range based on the phase difference of the compressor; determining each control point to be compensated including at least one frequency point from the low frequency range according to the vibration amplitude; determining a control compensation angle of any other frequency point besides the control points to be compensated in the low frequency range as the phase difference of the compressor; for each control point to be compensated: aiming at the current control points to be compensated control point, fixing the current compensation amplitude, and testing the phase difference compensation value of minimum vibration of the compressor; determining the control compensation angle of the current control point to be compensated as the sum of the compressor phase difference and phase difference compensation value. According to the invention, the control compensation angle is targeted to be determined, so that the appropriate vibration suppression effect can be achieved for eachfrequency point of the variable frequency air conditioner, and the fixed point clearance of the low frequency vibration of the variable frequency air conditioner can be achieved.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a method and device for determining a control compensation angle based on low-frequency vibration of an inverter air conditioner. Background technique [0002] The minimum frequency of stable operation of the inverter air conditioner determines the minimum cooling capacity of the air conditioner. The smaller the heat load of the room, the lower the frequency of operation of the inverter air conditioner. If the minimum cooling capacity of the inverter air conditioner is greater than the room heat load, it must pass through the compressor Shut down to keep the room temperature from dropping. The single-rotor compressor drives the rollers to compress the refrigerant through the eccentric crankshaft, and there is a large torque fluctuation during the rotation process, and the lower the speed, the more obvious the torque fluctuation. In order to reduce the vibration of the single...

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Problems solved by technology

[0004] However, due to the complex structure and working conditions of the inverter air conditioner compressor, this compensation method with fixed amplitude and angle cannot achieve a suitable vibration suppression effect for each frequency point of the inverter air conditioner.

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