Method and device for automatically compensating compressor moment, compressor and compressor control method thereof

Abstract

The invention discloses a method for automatically compensating compressor moment. The method for automatically compensating the compressor moment comprises the following steps of obtaining the target speed and the feedback speed; generating the fluctuation speed according to the target speed and the feedback speed; utilizing a PLL mode to generate a moment compensating angle according to the target speed and the fluctuation speed; obtaining a loading moment reference value and generating a moment compensating amplitude value according to the loading moment reference value; generating a feedforward moment compensating value according to the target speed, the moment compensating angle and the moment compensating amplitude value. By adopting the method for automatically compensating the compressor moment, a loading moment angle and a loading moment amplitude value can be tracked in real time, the debugging time for moment compensation is greatly reduced, and the optimal compensation effect is achieved in a full-working-condition range of a compressor. The invention further discloses a compressor control method, a device for automatically compensating the compressor moment and the compressor provided with the device.

Description

technical field [0001] The invention relates to the technical field of compressor control, in particular to a compressor torque automatic compensation method, a compressor control method, a compressor torque automatic compensation device and a compressor with the device. Background technique [0002] In recent years, with the rapid development of frequency conversion control technology and the popularization of the concept of high efficiency and energy saving, frequency conversion air conditioners have been rapidly popularized and applied. The inverter air conditioner achieves the purpose of controlling the room temperature by changing the power supply frequency of the compressor and adjusting the speed of the compressor speed, so that the fluctuation of the room temperature is small, the power consumption is small, and the comfort level is greatly improved. [0003] At present, all energy-efficient inverter air conditioners on the market use DC inverter compressors, which u...

AI Technical Summary

Problems solved by technology

Among them, DC variable frequency single-cylinder compressors below 2HP are the mainstream products. However, single-cylinder compressors have the characteristics of uneven load. In the air-conditioning vector control system, the speed loop bandwidth is low, so the electromagnetic torque cannot track the actual load torque. , so the vibration is larger at low frequencies

The single-cylinder compressor needs to add torque compensation to run stably at low frequency operation, but ordinary sinusoidal torque compensation needs to find the best angle value and the best amplitude value according to the vibration in the air conditioning system in real time, which requires a lot of time and effort to debug Torque compensation, and the compensation effect is general

There is only one angle at each frequency of compressor operation and only one amplitude given at the same frequency. The amplitude and angle cannot be changed according to the load, but in the actual process, the fundamental angle of the load moment and the load change in real time, which is As a result, the torque compensation will appear over-compensated or under-compensated, or the compensation angle will be greatly different, resulting in a large vibration of the compressor

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