Magnet evaluating device and method

摘要

A magnet evaluating device evaluates an evaluation magnet by passing the evaluation magnet, which is formed by connecting a plurality of magnetic sections with insulating material in between, and a master magnet of the same form through an alternating magnetic field generated by an excitation coil, measuring the eddy current occurring in the magnetic section as voltage or current occurring in a detection coil and comparing the measured value for the evaluation magnet and the measured value for the master magnet.

主权项

1. A magnet evaluating device, comprising:
an excitation coil configured to generate a magnetic field; a detection coil configured to detect an eddy current occurring in an evaluation magnet and a master magnet; a holder having the evaluation magnet and the master magnet set therein, the evaluation magnet being formed by connecting a plurality of evaluation magnetic sections with insulating material therebetween, and the master magnet being formed by connecting a plurality of master magnetic sections with insulating material therebetween; a transfer unit configured to transfer the evaluation magnet and the master magnet set in the holder through the magnetic field; and an evaluation unit configured to compare a first measurement and a second measurement, the first measurement measuring a first voltage or a first current generated in the detection coil when the evaluation magnet passes through the magnetic field, and the second measurement measuring a second voltage or a second current generated in the detection coil when the master magnet passes through the magnetic field.