| 摘要 |
<P>PROBLEM TO BE SOLVED: To remove influence of an armature reaction and to improve the accuracy of estimation of the temperature of a permanent magnet. <P>SOLUTION: A magnetic sensor 1 is arranged in a stator of a permanent-magnet rotating machine where the permanent magnet is used for a rotor, and air-gap magnetic flux density is measured between the rotor and the stator. A processor 2 detects the magnetic flux density due to the armature reaction, removes magnetic flux density due to the armature reaction from the air-gap magnetic flux density measured by the magnetic sensor 1, extracts magnetic flux density of the permanent magnet, and estimates the temperature of the permanent magnet based on extracted magnetic flux density of the permanent magnet. <P>COPYRIGHT: (C)2008,JPO&INPIT |
