Title :
High precision calorimetry for the measurement of the efficiency of induction motors
Author :
McLeod, P. ; Bradley, K.J. ; Ferrah, A. ; Magill, R. ; Clare, J.C. ; Wheeler, P. ; Sewell, P.
Author_Institution :
Dept. of Electr. & Electron. Eng., Nottingham Univ., UK
Abstract :
Calorimeters are used to measure directly the loss in electrical machines operating under various load conditions. This paper examines experimental errors resulting from calorimeter design and from operating procedures. The techniques of minimising these errors used by previous researchers are reviewed. An improved technique for obtaining high accuracy in the measurement of power loss is discussed based on two generations of a calorimeter. The performance of these designs is presented with the first providing an accuracy of 0.5% and the second better than 0.2% in measurement of total loss at the 30 kW level.
Keywords :
calorimetry; heat losses; heat measurement; induction motors; machine testing; 30 kW; calorimeter design; heat loss measurement; high-precision calorimetry; induction motor efficiency measurement; load conditions; measurement accuracy; measurement performance; operating procedures; Calorimetry; Coolants; Cooling; Electric variables measurement; Induction motors; Loss measurement; Power measurement; Steady-state; Temperature; Water heating;
Conference_Titel :
Industry Applications Conference, 1998. Thirty-Third IAS Annual Meeting. The 1998 IEEE
Conference_Location :
St. Louis, MO, USA
Print_ISBN :
0-7803-4943-1
DOI :
10.1109/IAS.1998.732311
