US 12,407,282 B2
Field winding interlayer short-circuit monitoring device and field winding interlayer short-circuit monitoring method
Masafumi Fujita, Yokohama Kanagawa (JP); Yasuo Kabata, Yokohama Kanagawa (JP); Toshio Hirano, Yokohama Kanagawa (JP); Yuichiro Gunji, Yokohama Kanagawa (JP); Masashi Kobayashi, Kawasaki Kanagawa (JP); Hirotada Endo, Ota Tokyo (JP); and Koji Ando, Yokohama Kanagawa (JP)
Assigned to TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATION, Kawasaki (JP)
Filed by TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATION, Kawasaki (JP)
Filed on Jan. 2, 2024, as Appl. No. 18/402,437.
Claims priority of application No. 2023-045718 (JP), filed on Mar. 22, 2023.
Prior Publication US 2024/0322719 A1, Sep. 26, 2024
Int. Cl. H02P 9/00 (2006.01)
CPC H02P 9/006 (2013.01) 7 Claims
OG exemplary drawing
 
1. A field winding interlayer short-circuit monitoring device for a rotary electric machine, the device comprising:
an input unit configured to obtain field winding current values and field winding voltage values from the rotary electric machine at a predetermined sampling cycle;
a memory configured to store a plurality of first field winding resistance versus current characteristic curves in an abnormal state with interlayer short-circuits and a second field winding resistance versus current characteristic curve in a normal state without interlayer short-circuit, each of the plurality of the first field winding resistance versus current characteristic curves being with different interlayer short-circuits from each other;
a field winding resistance calculator configured to calculate a field winding resistance value by dividing each of the obtained field winding voltage values by each of the obtained field winding current values;
an average value calculator configured to calculate an average resistance value and an average current value by averaging the field winding resistance values and the field winding current values obtained during a predetermined time interval respectively; and
an image data generator configured to generate image data to display a predetermined number of average value data each composed of the average resistance value and the average current value along with the plurality of the first field winding resistance versus current characteristic curves in the abnormal state and the second field winding resistance versus current characteristic curve in the normal state.