Abstract: A hybrid AC and DC distribution system includes a doubly fed induction generator (DFIG), a DC distribution bus, an AC/DC converter, an AC distribution bus, and a DC/AC converter. The DFIG includes a rotor and a stator, and is configured to generate a first AC power at the rotor and a second AC power at the stator. The AC/DC converter is coupled to the rotor and the DC distribution bus. The AC/DC converter converts the first AC power to a first DC power at a first node for delivery to a first load through the DC distribution bus. The DC/AC converter is coupled between the first node and a second node coupled to the stator and the AC distribution bus. The DC/AC converter converts the first DC power to the second AC power at the second node for delivery to a second load through the AC distribution bus.

Abstract: A power generation system is provided. The system includes a prime mover for transforming a first energy to a second energy. The system also includes an induction generator operatively coupled to the prime mover and configured to generate electrical power using the second energy. The system further includes an inverter electrically coupled to the induction generator for controlling a terminal voltage of the induction generator during a grid-loss condition. The system also includes a power dissipating device operatively coupled to the inverter for dissipating power generated by the induction generator during the grid-loss condition.

Abstract: A method of monitoring health of a mechanical drive train is provided. The method includes obtaining voltage and current signals from at least one phase of an electrical machine coupled with the mechanical drive train. The method also includes representing the electrical machine having a non-sinusoidal flux distribution as a combination of a plurality of harmonic order sinusoidally distributed virtual electrical machines based on the obtained voltage and current signals. The method further includes determining a torque profile associated with one or more combinations of the sinusoidally distributed virtual electrical machines. Finally, the method includes detecting the presence of an anomaly in the mechanical drive train based on the torque profile or spectrum.

Abstract: A method, system and computer program product for monitoring health of a synchronous machine is provided. The method includes receiving a plurality of phase voltage values and a plurality of phase current values. The method then computes a negative sequence voltage (Vn) based on the plurality of phase voltage values. The method also computes one or more operating parameters based on at least one of the plurality of phase voltage values and the plurality of phase current values. The method retrieves from a data store, one or more known Vn based on the one or more operating parameters. The method then computes a machine health indicator based on the computed Vn and the one or more known Vn, and raises an alarm based on the machine health indicator.

Abstract: A method for detecting an anomaly in an induction machine includes obtaining or receiving a signal from the induction machine; processing the signal so as to obtain a low frequency signal, then rectifying the low frequency signal; and, declaring if the anomaly is present, based on the rectified low frequency signal. A system for detecting anomalies is also disclosed. The present invention has been described in terms of specific embodiment(s), and it is recognized that equivalents, alternatives, and modifications, aside from those expressly stated, are possible and within the scope of the appending claims.

Abstract: A system comprising a contactless power transfer system is presented. The system includes a primary element, a secondary element, and at least one field-focusing element interposed between the primary element and the secondary element and configured to focus a magnetic field. A partition is disposed between the primary element and the secondary element. The contactless power transfer system is disposed within pressure isolation cavities of a sub-sea assembly and configured to transfer power between a power source and a load.

Abstract: Methods and systems are provided for an engine. A condition of the engine may be diagnosed based on information provided by signals from a generator operationally connected to the engine and/or other signals associated with the engine. Different types of degradation may be distinguished based on discerning characteristics within the information. Thus, a degraded engine component may be identified in a manner that reduces service induced delay.

Abstract: A contactless power transfer system for a mobile asset is presented. The system includes a primary loop disposed adjacent to a location that is coupled to a power source. A secondary receiving coil is disposed on the mobile asset and coupled to a traction motor for receiving power from the primary loop. The power transfer system further includes a field-focusing element that can focus a magnetic field from the primary loop onto the secondary receiving coil, the field-focusing element having a non-linear current distribution.

Abstract: A method of monitoring health of a mechanical drive train is provided. The method includes obtaining voltage and current signals from at least one phase of an electrical machine coupled with the mechanical drive train. The method also includes representing the electrical machine having a non-sinusoidal flux distribution as a combination of a plurality of harmonic order sinusoidally distributed virtual electrical machines based on the obtained voltage and current signals. The method further includes determining a torque profile associated with one or more combinations of the sinusoidally distributed virtual electrical machines. Finally, the method includes detecting the presence of an anomaly in the mechanical drive train based on the torque profile or spectrum.

Abstract: A method, system and computer program product for monitoring health of a synchronous machine is provided. The method includes receiving a plurality of phase voltage values and a plurality of phase current values. The method then computes a negative sequence voltage (Vn) based on the plurality of phase voltage values. The method also computes one or more operating parameters based on at least one of the plurality of phase voltage values and the plurality of phase current values. The method retrieves from a data store, one or more known Vn based on the one or more operating parameters. The method then computes a machine health indicator based on the computed Vn and the one or more known Vn, and raises an alarm based on the machine health indicator.

Abstract: A magnetic separator comprising a separation chamber is provided. The magnetic separator comprises an inlet and at least one outlet, and a magnetic source operatively coupled to the separation chamber and comprising a plurality of magnets that can be selectively turned off and on to create a dynamic magnetic field in the separation chamber.

Abstract: A magnetic separator comprising a separation chamber is provided. The separation chamber comprises a having an inlet and at least one outlet opposite the inlet in a downstream direction, and a magnetic source operatively coupled to the separation chamber. The magnetic source comprises a plurality of magnets that can be selectively turned off and on to create a dynamic magnetic field in the separation chamber.

Abstract: A method for detecting an anomaly in a rotor of an induction machine is provided. The method includes obtaining or receiving three-phase stator voltage and current signals from the induction machine connected to a time varying load. The method also includes processing the three-phase stator voltage and current signals by transforming into corresponding two-phase quantities. Further, the method includes transforming the two-phase quantities into two quadrature components into a two-phase reference frame. The method includes analyzing a plurality of in-phase components and the quadrature components. Finally, the method includes detecting the presence of an anomaly and segregating the anomaly from load variations based on the analysis of the plurality of in phase components and the quadrature components, thereby reducing false alarm.

Abstract: A system and method are provided for correction of parameters used in determination of stator turn faults of an induction motor. An embodiment may include determining a residual impedance and/or a residual voltage of the motor, and correcting a normalized cross-coupled impedance based on the residual impedance and residual voltage. Additional embodiments may include measuring an operating temperature of the motor and determining a negative sequence impedance of the motor based on the temperature. Another embodiment may include measuring voltages and currents of the motor and determining phasors for the voltages and currents using compensation for variations from a nominal frequency of the motor.

Abstract: A system and method for identifying turn faults in a stator of a motor are provided. The method includes determining a normalized cross-coupled impedance from the symmetrical components of measured voltages and currents of the motor. Additionally, the normalized cross-coupled impedance may be normalized to a negative sequence impedance. The negative sequence impedance may be determined through a regression analysis using parameters of the motor, such as line-to-line voltage, horsepower, and number of poles. A system is provided that includes a device having a memory and processor configured to determine a normalized cross-coupled impedance, compare the normalized cross-coupled impedance to one or more thresholds, and trigger and alarm and/or trip the motor.

Abstract: A contactless power transfer system for a mobile asset is presented. The system includes a primary loop disposed adjacent to a location that is coupled to a power source. A secondary receiving coil is disposed on the mobile asset and coupled to a traction motor for receiving power from the primary loop. The power transfer system further includes a field-focusing element that can focus a magnetic field from the primary loop onto the secondary receiving coil, the field-focusing element having a non-linear current distribution.

Abstract: The present application discloses a process for the high throughput separation of at least one distinct biological material from a sample using magnetic tags and a magnetic separation set up capable of processing at least about 106 units/second. A magnetic field gradient is used to deflect target material bearing a magnet tag from one laminar flow stream to another so that the magnetically tagged target material exits a separation chamber via a different outlet than the rest of the sample. The process is applicable to isolating several distinct biological materials by directing each via magnetic deflection to its own unique outlet. The application also discloses a system for performing the process and a kit that includes the system and the magnetic tags.

Abstract: A system comprising a contactless power transfer system is presented. The system includes a primary element, a secondary element, and at least one field-focusing element interposed between the primary element and the secondary element and configured to focus a magnetic field. A partition is disposed between the primary element and the secondary element. The contactless power transfer system is disposed within pressure isolation cavities of a sub-sea assembly and configured to transfer power between a power source and a load.

Abstract: A system for detecting and classifying a wheel of a rail vehicle traveling on a railway track includes a plurality of wheel detectors coupled to one rail of the railway track and configured to detect presence of the wheel and to generate signals representative thereof. A processing system is coupled to the wheel detectors and configured to receive and process the signals. The processing system is configured to classify the wheel based on a speed independent classification value calculated based on the signals from the wheel detectors.

Abstract: The present application discloses a process for the high throughput separation of at least one distinct biological material from a sample using magnetic tags and a magnetic separation set up capable of processing at least about 106 units/second. A magnetic field gradient is used to deflect target material bearing a magnet tag from one laminar flow stream to another so that the magnetically tagged target material exits a separation chamber via a different outlet than the rest of the sample. The process is applicable to isolating several distinct biological materials by directing each via magnetic deflection to its own unique outlet. The application also discloses a system for performing the process and a kit that includes the system and the magnetic tags.