Abstract: A modular military vehicle and a method for using a modular military vehicle is disclosed. The modular military vehicle can comprise a vehicle hull; a crew module removably mounted to the vehicle hull; a plurality of wheels mounted to the vehicle hull, the plurality of wheels comprising at least one driven wheel; and an electric drive system configured to drive the at least one driven wheel.

Abstract: A closed-loop cooling system is internal to the enclosure of an induction drive system. Two inverter modules of the induction drive system each includes three insulated gate bipolar transistor (IGBT) modules for producing an AC output from a DC source, the AC output received by an induction coil for heating a metal.

Abstract: A modular military vehicle and a method for using a modular military vehicle is disclosed. The modular military vehicle can comprise a vehicle hull; a crew module removably mounted to the vehicle hull; a plurality of wheels mounted to the vehicle hull, the plurality of wheels comprising at least one driven wheel; and an electric drive system configured to drive the at least one driven wheel.

Abstract: A power inverter comprises a plurality of high power switching modules that form an alternating current (AC) output; a plurality of terminals in communication with the high power switching modules for outputting the AC output; a capacitor bank that provides a conditioned voltage to the high power switching modules for producing the AC output in response to receiving and storing electrical energy related to a direct current (DC) supply; and a case positioned over the high power switching modules. The capacitor bank is mounted to the case, and the capacitor bank is positioned over the high power switching modules so that the high power switching terminals are proximal the capacitor bank for reducing inductance. A gate driver module at a top region of the high power switching modules includes a plurality of planar transformers for reducing a distance between the capacitor bank and the gate driver.

Abstract: A power inverter comprises a plurality of high power switching modules that form an alternating current (AC) output; a plurality of terminals in communication with the high power switching modules for outputting the AC output; a capacitor bank that provides a conditioned voltage to the high power switching modules for producing the AC output in response to receiving and storing electrical energy related to a direct current (DC) supply; and a case positioned over the high power switching modules. The capacitor bank is mounted to the case, and the capacitor bank is positioned over the high power switching modules so that the high power switching terminals are proximal the capacitor bank for reducing inductance. A gate driver module at a top region of the high power switching modules includes a plurality of planar transformers for reducing a distance between the capacitor bank and the gate driver.

Abstract: An induction drive system comprises an enclosure; a closed-loop cooling system internal to the enclosure; and two inverter modules that each includes three insulated gate bipolar transistor (IGBT) modules for producing an AC output from a DC source, the AC output received by an induction coil for heating a metal.

Abstract: A power inverter comprises a plurality of high power switching modules that form an alternating current (AC) output; a plurality of terminals in communication with the high power switching modules for outputting the AC output; a capacitor bank that provides a conditioned voltage to the high power switching modules for producing the AC output in response to receiving and storing electrical energy related to a direct current (DC) supply; and a case positioned over the high power switching modules. The capacitor bank is mounted to the case, and the capacitor bank is positioned over the high power switching modules so that the high power switching terminals are proximal the capacitor bank for reducing inductance. A gate driver module at a top region of the high power switching modules includes a plurality of planar transformers for reducing a distance between the capacitor bank and the gate driver.

Abstract: An annular stator assembly includes a plurality of stator segments. Each stator segment includes a plurality of laminates having magnetic permeable properties; a plurality of thermally conductive laminates positioned between the permeable laminates; and a cooling pipe extending through the laminates for transferring heat from the laminates to coolant flowing through the cooling pipe. The stator segments are constructed independently. Coils are wound on each segment. The stator segments with the wound coils are subsequently arranged to form the annular stator assembly.

Abstract: A power inverter comprises a plurality of high power switching modules that form an alternating current (AC) output; a plurality of terminals in communication with the high power switching modules for outputting the AC output; a capacitor bank that provides a conditioned voltage to the high power switching modules for producing the AC output in response to receiving and storing electrical energy related to a direct current (DC) supply; and a case positioned over the high power switching modules. The capacitor bank is mounted to the case, and the capacitor bank is positioned over the high power switching modules so that the high power switching terminals are proximal the capacitor bank for reducing inductance. A gate driver module at a top region of the high power switching modules includes a plurality of planar transformers for reducing a distance between the capacitor bank and the gate driver.

Abstract: Provided are a power management system and method. At least one frame module includes at least one bay and a plurality of first connectors at a rear portion of the at least one bay and at least one power conversion unit positioned in the at least one bay. The at least one power conversion unit includes a plurality of second connectors. Each second connector is removably coupled to a first connector of the plurality of first connectors. The first and second connectors include a combination of high power, cooling, and control connectors.

Abstract: Provided are a power management system and method. At least one frame module includes at least one bay and a plurality of first connectors at a rear portion of the at least one bay and at least one power conversion unit positioned in the at least one bay. The at least one power conversion unit includes a plurality of second connectors. Each second connector is removably coupled to a first connector of the plurality of first connectors. The first and second connectors include a combination of high power, cooling, and control connectors.

Abstract: A rotor magnet retention device comprises a retainer body and a fastening device. The retainer body includes a bottom region, at least two angled side regions extending from the bottom region, and at least one opening extending through a bottom surface of the retainer body. The fastening device extends through the opening at a bottom surface of the retainer body to a rotor to flexibly position the retainer body relative to the rotor. A first angled side surface conformably communicates with a first magnet coupled to the rotor and a second angled side surface conformably communicates with a second magnet coupled to the rotor.

Abstract: An annular stator assembly includes a plurality of stator segments. Each stator segment includes a plurality of laminates having magnetic permeable properties; a plurality of thermally conductive laminates positioned between the permeable laminates; and a cooling pipe extending through the laminates for transferring heat from the laminates to coolant flowing through the cooling pipe. The stator segments are constructed independently. Coils are wound on each segment. The stator segments with the wound coils are subsequently arranged to form the annular stator assembly.

Abstract: Permanent magnets are mounted on a rotor of an electrical motor by an apparatus that keeps an adhesive bonding layer between the magnet and rotor in compression over wide variations in temperature and speed of rotation. The mechanical stresses on the magnets are controlled using compliant layers and spacers. The apparatus allows the removal and replacement of individual magnets.

Abstract: A method and control system for directional drilling are described. A drill string motor is commanded to rotate at a constant speed in a forward direction and the constant speed in a reverse direction for a first duration and a second duration, respectively, for at least one oscillation cycle. The difference between an averaged absolute angle of the drill string and a target rotation angle for the drill string is maintained near zero by adjusting the length of the durations as necessary. The target rotation angle can be changed based on measurement while drilling data obtained during drilling operations. Advantageously, friction between the drill string and bore hole is reduced, leading to an increase in the drilling penetration rate.

Abstract: An apparatus and method for controlling an actuator system having an electrical actuator in hydraulic communication with a hydraulic actuator are described. The apparatus includes a controller module in communication with a source of electrical power and a transceiver. The transceiver is adapted for bi-directional wireless communication with a remote transceiver for the transfer of control data and feedback data. The controller module sends a control signal to the electrical actuator in response to control data received from the remote transceiver. The source of electrical power includes a hydraulic motor and an electrical generator to provide local electrical power from a hydraulic flow. Because the electrical power is generated locally and the control and feedback data are carried over the wireless link, no wires to remote locations are required.

Abstract: An arrangement of coils of different configurations for use in the stator of a slotless radial gap electromotive machine is described. The coils include coils of a first configuration and a second configuration. Each coil includes longitudinal sections and circumferential sections that form a substantially rectangular opening in the coil. The coils are nested together along the inside of a stator core so that the longitudinal sections of each coil of the first configuration are disposed in the rectangular openings of neighboring coils of the second configuration, and the longitudinal sections of the coils of the second configuration are disposed in the rectangular openings of neighboring coils of the first configuration. Other configurations of coils can be nested together inside the stator core to provide one or more additional layers of stator coils.

Abstract: An apparatus for determining the angular position of a rotating component having a plurality of angularly spaced magnetic elements is described. The apparatus includes a sensor board and a processor circuit. The sensor board is disposed adjacent to the rotating component and includes a plurality of sensor groups. Each sensor group includes a plurality of magnetic sensors positioned to sense a magnetic field of one of the angularly spaced magnetic elements. Each sensor group generates a multi-state group signal in response to the passage of one of the angularly spaced magnetic elements. The processor circuit communicates with each of the sensor groups and generates position signals in response to the multi-state group signals.

Abstract: An apparatus and method for controlling an actuator system having an electrical actuator in hydraulic communication with a hydraulic actuator are described. The apparatus includes a controller module in communication with a source of electrical power and a transceiver. The transceiver is adapted for bi-directional wireless communication with a remote transceiver for the transfer of control data and feedback data. The controller module sends a control signal to the electrical actuator in response to control data received from the remote transceiver. The source of electrical power includes a hydraulic motor and an electrical generator to provide local electrical power from a hydraulic flow. Because the electrical power is generated locally and the control and feedback data are carried over the wireless link, no wires to remote locations are required.

Abstract: An arrangement of coils of different configurations for use in the stator of a slotless radial gap electromotive machine is described. The coils include coils of a first configuration and a second configuration. Each coil includes longitudinal sections and circumferential sections that form a substantially rectangular opening in the coil. The coils are nested together along the inside of a stator core so that the longitudinal sections of each coil of the first configuration are disposed in the rectangular openings of neighboring coils of the second configuration, and the longitudinal sections of the coils of the second configuration are disposed in the rectangular openings of neighboring coils of the first configuration. Other configurations of coils can be nested together inside the stator core to provide one or more additional layers of stator coils.