Vibration reduction in rolling piston-type compressors through motor torque control (experimental study on control effects)

In the previous paper, the authors proposed torque control systems that may be effective to reduce vibration of a rolling piston-type compressor for a room air conditioner. This paper deals mainly with the experimental results of the torque control systems. Two types of control models, a "rotational speed control model" and a "rotational acceleration control model" were used, and the stability and the transient response were discussed in comparison with the simulation. It was shown that the experimental results generally agreed well with the simulaion predictions, although the degree of actual Control effects was a slightly inferior because of detection errors and response lags in the actual control system. By comparing both control systems wlth each other, it was proven that the rotational acceleration control system is superior and can reduce the compressor chamber vibration in a stabler and faster response.