G - Physics – 01 – K
Patent
G - Physics
01
K
73/72
G01K 7/00 (2006.01) G01K 7/20 (2006.01) G01R 31/34 (2006.01)
Patent
CA 2023651
ABSTRACT OF THE DISCLOSURE An apparatus for measuring the winding temperature of electric machines uses an a.c. reference voltage source generating an a.c. reference voltage with a predetermined, non-line frequency, preferably below 10 Hz., a current detector detecting the current generated from the a.c. reference voltage and/or the a.c. reference voltage directly, and a measuring and evaluating device measuring the current to determine the winding temperature. The a.c. reference voltage is added geometrically to the line voltage and generates a current proportional to the winding conductance which is temperature dependent.
Maier Reinhard
Trenkler Gerhard
Wedekind Reinhard
Aktiengesellschaft Siemens
Fetherstonhaugh & Co.
Maier Reinhard
Trenkler Gerhard
Wedekind Reinhard
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