FIELD SYSTEM STATE MEASURING APPARATUS

摘要

PURPOSE:To measure a field system state at a high accuracy, by outputting a signal with a position detector linked to a rotor equipped with a permanent magnet as the rotor moves at each specified angle of rotation to detect a field system state of the permanent magnet synchronizing the signal. CONSTITUTION:A heater 12 equipped with a permanent magnet 1 is rotated with a drive motor 6 and a field system state of the permanent magnet 1 is outputted continuously with a Hall element 2 arranged as opposed to the permanent magnet 1 to be inputted into an A/D converter 4. A position detector 3 linked to a rotor 12 outputs a signal as the rotor 12 moves at each angle of rotation to be inputted into a conversion command terminal of the A/D converter 4. This enables detection of a field system state of the permanent magnet 1 at each specified angle of rotation, thereby enabling highly accurate measurement of the field system state with a simple construction.