Abstract: A rotor that utilizes non-magnetic fillers to reduce magnetic flux leakage and maintain structural integrity is disclosed. In some embodiments, the rotor includes at least a plurality of rotor laminations, a magnet, and one or more non-magnetic fillers. The plurality of rotor laminations structurally form at least a first cavity and a second cavity. The magnet is disposed in the first cavity. The one or more non-magnetic fillers are disposed in the second cavity and bonded to the plurality of rotor laminations. The one or more non-magnetic fillers structurally support the plurality of rotor laminations.

Abstract: Systems and methods for enhanced techniques for analyzing induction motors. An example method includes accessing circuit model information associated with an induction motor (IM), the circuit model information representing rotor bars of the IM as each including respective rotor segments. Rotor segment nominal currents associated with the rotor segments are determined, with the determination being based on performing finite element analysis (FEA) over a grid and use of a linearized circuit model. Rotor segment ripple currents associated with the rotor segments are determined, with the determination being based on performance of FEA to extract flux ripple samples over the grid, with the flux ripple samples being transformed into a time-varying rotor flux ripple signal, and with the rotor segment ripple currents being determined based on the time-varying rotor flux ripple signal. Losses associated with the IM are determined.

Abstract: Systems and methods for enhanced techniques for analyzing induction motors. An example method includes accessing circuit model information associated with an induction motor (IM), the circuit model information representing rotor bars of the IM as each including respective rotor segments. Rotor segment nominal currents associated with the rotor segments are determined, with the determination being based on performing finite element analysis (FEA) over a grid and use of a linearized circuit model. Rotor segment ripple currents associated with the rotor segments are determined, with the determination being based on performance of FEA to extract flux ripple samples over the grid, with the flux ripple samples being transformed into a time-varying rotor flux ripple signal, and with the rotor segment ripple currents being determined based on the time-varying rotor flux ripple signal. Losses associated with the IM are determined.

Abstract: In an example embodiment, a method of controlling an electric machine includes obtaining an estimated position waveform, the estimated position waveform being based on a position of a rotor of the electric machine, the estimated position waveform having an error signal and an actual position waveform and determining a corrected position waveform based on the estimated position waveform. The determining the corrected position waveform of the rotor includes determining an estimated first coefficient and an estimated second coefficient and reducing at least one frequency component of the error signal using the estimated first coefficient and the estimated second coefficient to determine the corrected position waveform. The method further includes controlling the electric machine based on the corrected position waveform and reducing a ripple in a direct current (DC) link voltage based on the controlling.

Abstract: In an example embodiment, a method of controlling an electric machine includes obtaining an estimated position waveform, the estimated position waveform being based on a position of a rotor of the electric machine, the estimated position waveform having an error signal and an actual position waveform and determining a corrected position waveform based on the estimated position waveform. The determining the corrected position waveform of the rotor includes determining an estimated first coefficient and an estimated second coefficient and reducing at least one frequency component of the error signal using the estimated first coefficient and the estimated second coefficient to determine the corrected position waveform. The method further includes controlling the electric machine based on the corrected position waveform and reducing a ripple in a direct current (DC) link voltage based on the controlling.