The application discloses a cage type cast aluminum rotor defect detection device and method, and belongs to the cast aluminum rotor defect detection field, including a test table, a
magnetic field generating unit, a rotor clamp unit, a defect monitoring device and a constant
temperature control system are arranged on the test table; the principle of locked-rotor experiment is used to detect the cast aluminum rotor bar defects, the
stator winding temperature is monitored in real time through the constant
temperature control unit temperature sensor, when the temperature exceeds the preset threshold value, the cooling
assembly is started, the temperature is stabilized in the
target range, the winding resistance is maintained constant, the current change is ensured to be caused by the rotor defect, not the temperature fluctuation, thereby the detection accuracy is improved, in the batch detection of the rotor
assembly line, if the temperature is not controlled, continuous detection of multiple rotors can cause the winding temperature to gradually increase, the resistance change accumulates, and finally the current reference deviates from the initial value. The constant
temperature control unit itself ensures that the detection environment of each rotor is consistent through real-time cooling, and accumulation error is avoided.