| 摘要 |
PURPOSE:To enable the temperature of a rotor to be exactly detected in non- contact system, by fitting a permanent magnet at a position with the transmitted heat of a rotor core, and by detecting the quantity of magnetic flux generated from the permanent magnet, with a magnetism-detecting element. CONSTITUTION:A permanent magnet 5 is fitted so that heat generated from a rotor core 3b may be transmitted to the rotor core 3b. Besides, magnetic units 4 and 6 are fitted on a rotary shaft 3a, and the magnetic circuit of the permanent magnet 5 is contrived to be formed with a space 7 between the units 4, 6. In the space 7, a magnetism-detecting element (a hole element ) 9 is set in a non-contact state, and the quantity of the magnetic flux of the permanent magnet 5 is contrived to be detected. The quantity of the magnetic flux of the permanent magnet is varied depending on a temperature, thereby the temperature of a rotor 3 can be measured with the output value of the magnetism-detecting element 9. |
