Rotor Temperature Distribution Measuring System

The work proposes instrumentation for measuring local temperatures on the surface and in the interior of a rotor. The applied design incorporates up to 12 simultaneous local temperature measurements on arbitrary locations in the rotor. Thus, a realistic 3D thermal distribution picture of the rotor can be obtained. The system characterizes with accuracy of ±1.5 °C, noise immunity under inverter operation, continuous measuring durations of up to 30h and mechanical rigidity for up to 6000 rpm rotor speed. The mechanical assembly is appropriate for laboratory setups since adaptation on the motor are required. Experimental results, conducted on an induction motor and permanent-magnet synchronous motor, are presented to demonstrate system feasibility.