Initial adjustment circuit and initial adjustment method of magnetic bearing apparatus

摘要

A main adjusting circuit obtains an intermediate value of maximum and minimum values of an output from a position sensor when a rotational shaft is brought into contact with a ball bearing for protection by reduction in a proportional constant K of a proportional circuit. An offset value corresponding to a difference between 0V and the intermediate value of the vibration is added to or subtracted from the output from the sensor for initial adjustment.