Research on speed ripple suppression algorithm of compressor motor based on torque tracking current error correction
The speed ripple suppression algorithm of compressor motor based on torque tracking current error correction was proposed to address the issues of large torque ripple and high vibration noise in the operation of a permanent magnet compressor for air conditioning. Initially,based on the characteristics of the torque ripple,an analysis of the compressor' s periodic speed ripple was conducted. The iterative learning control approach was employed to obtain torque tracking current. On this basis,the optimized filtering function was introduced to extract the fundamental component of the torque tracking current. At the same time,the torque tracking current error correction law was introduced to correct the error between the torque tracking current and the reference torque current,and the feedforward compensation current was obtained and fed forward to the control system. The error accumulation of traditional iterative learning torque tracking current was eliminated,and the compressor speed ripple was effectively suppressed. Fi-nally,The algorithm is validated on an experimental platform for air conditioning compressors,and the experimental results demonstrate effectively mitigating compressor torque ripple.
compressor systemlow frequency speed ripplecharacteristic filter functiontorque tracking current error correction lawiterative learning
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