Power-Hardware-in-the-Loop Based Induction Motor Emulator with Rotor Cage Fault

The induction machine (IM) is commonly adopted in industry, which plays an important role in energy conversion between mechanical and electrical power. Asymmetrical faults caused by internal failures commonly occur in IMs. Such faults not only reduce the working efficiency and cause excessive heating, but also cause potential hazards preventing continuous operation and safety problems. This paper proposes a power electronic converter-based IM power hardware-in-the-loop (PHIL) emulator, which is able to emulate an IM with internal faults. Firstly, the machine parameter measurement method for an induction motor with a rotor cage fault is introduced. Then the rotor cage fault machine is identified by using stator current spectral components. Based on that, the PHIL emulator is developed and tested for an IM with rotor cage fault. A comparison of the emulator results with simulation results and actual IM results demonstrates the validity of proposed solution.