ملخص: In recent years there has been a shift towards the development of highly efficient and high torque inertia electrical machines. The limiting factors in these designs are the losses which effectively reduce the output capability and, possibly, the life span of the machine. To limit these undesirable effects a prior requirement is to accurately assess the iron losses, and understand their nature and, ideally, their spatial location. An experimental method for measuring the iron and stray load losses is presented. The test motor is a 3 phase, 4 pole, 4 kW induction motor which was heavily instrumented with thermocouples to map the loss distribution. The nature and distribution of the stray losses in various parts of the motor are also described.

لغة: إنجليزية