Apparatus and method for testing stator core of generator

An apparatus for testing a stator core of a generator comprising:

• a power supply configured to provide an excitation current having a base frequency;
• a frequency convertor connected to the power supply, the frequency convertor is configured to convert the base frequency of the excitation current to an excitation frequency that is greater than the base frequency;
• a rotor installed within the stator core;
• and
• an excitation cable connected to both axial ends of the rotor forming an excitation winding, with a single loop, between the excitation cable and the rotor,
• wherein the frequency convertor is connected to the excitation winding
• wherein during testing the excitation current is transmitted from the power supply onto the excitation winding by way of the frequency converter,
• wherein the frequency convertor is configured to convert the base frequency of the excitation current to an excitation frequency that is greater than the base frequency, and
• wherein the rotor is excited by the excitation current with the excitation frequency as a single excitation winding for simulating an operation state of the generator increasing a temperature of the stator core without overheating the rotor during testing.