Patent ID: 7605592

Claim:
A laminated core testing device to test a laminated core in a generator, comprising: a field winding that lies in parallel with an axis of rotation of the generator and is connected to a high-voltage testing device that produces alternating current during a test to simulate an operational state of the generator; and an infrared image detection device that is designed to detect infrared radiation during the simulated operational state of the generator; wherein the high-voltage testing device is configured to simulate the operational state of the generator by outputting a fundamental frequency and a power in single-phase form at an output voltage of at least 400 V that can be regulated, wherein the high-voltage testing device comprises a frequency converter for converting the fundamental frequency to a frequency that is greater than 50 Hz to energize the field winding at the greater frequency value and cause a thermal response indicative of at least one hot spot in the laminated core during the simulated operational state of the generator.