Abstract: A vehicle includes an electric motor, one or more low-voltage components, a high-voltage battery pack, and a direct current to direct current (DC-to-DC) converter. The high-voltage battery pack includes one or more high-voltage battery strings configured to provide a high-voltage output on a high-voltage bus for powering the electric motor. The DC-to-DC converter is connected to the one or more high-voltage battery strings, and is configured to generate a low-voltage output on a low-voltage bus for powering the one or more low-voltage components.

Abstract: A method includes receiving an indication of a charging current received at an on-board charging circuit of a vehicle from a source having a charging voltage. The on-board charging circuit includes a multi-phase traction motor, an inverter electrically coupled to the multi-phase traction motor and including an upper set of switching elements and a lower set of switching elements, and an energy storage device (ESD) electrically coupled to the inverter and having a storage voltage. The method includes determining whether the charging voltage is greater than or equal to the storage voltage. When the charging voltage is greater than or equal to the storage voltage, the method includes instructing at least one switching element in the upper set to operate in an on state and all of the switching elements in the lower set in an off state to cause fast charging of the ESD using the charging current.

Abstract: A vehicle includes an electric motor, one or more low-voltage components, a high-voltage battery pack, and a direct current to direct current (DC-to-DC) converter. The high-voltage battery pack includes one or more high-voltage battery strings configured to provide a high-voltage output on a high-voltage bus for powering the electric motor. The DC-to-DC converter is connected to the one or more high-voltage battery strings, and is configured to generate a low-voltage output on a low-voltage bus for powering the one or more low-voltage components.

Abstract: A method includes voltage vector command values for an electric motor implemented on a vehicle and operating in a linear region. The method also includes receiving system state information of the vehicle and determining that an overmodulation threshold is satisfied based on the system state information of the vehicle. Based on determining that the overmodulation threshold is satisfied, the method includes determining a modulation factor from a modulation index, generating a three-phase output based on the voltage vector command values and the modulation factor, and determining a plurality of control signals based on the three-phase output. Each respective control signal of the plurality of control signals corresponds to a respective switch among a plurality of switches of an inverter. The method also includes instructing the plurality of switches of the inverter to control operation of the electric motor in the overmodulation region based on the plurality of control signals.

Abstract: A method includes receiving a turning angle indication indicating a turn of front wheels of the vehicle in one of a left direction or a right direction by a turning angle relative to a first direction of travel of the vehicle, and determining that a magnitude of the turning angle satisfies a threshold turn angle. Based on determining that the magnitude of the turning angle satisfies the threshold turn angle, the method also includes operating the vehicle in a drift mode by determining that an inner rear wheel includes one of a left rear wheel or a right rear wheel of the vehicle, determining that an outer rear wheel includes the other one of the left rear wheel or the right rear wheel, and commanding at least one torque machine to provide forward torque to the inner rear wheel without providing any forward torque to the outer rear wheel of the vehicle.

Abstract: A suspension includes inner magnets coupled to an inner cylindrical member and outer magnets coupled to an outer cylindrical member that circumscribes the inner cylindrical member. The inner magnets are stacked on top of one another in an axial direction and include a first set having a first polarity alternately arrayed with a second set having a second polarity. The outer magnets are stacked on top of one another in the axial direction and include a first set having the first polarity alternately arrayed with a second set having the second polarity. Each inner magnet in the first set is radially aligned with an outer magnet in the second set and each inner magnet in the second set is radially aligned with an outer magnet in the first set to provide an attractive electromagnetic field between the magnets that passively absorbs axial displacement between the inner and outer cylindrical members.

Abstract: Techniques for strength training using an exercise system including an electric linear motor. The exercise system includes a stand, including the electric linear motor comprising a mover and a rotor, and a user interface. The exercise system further includes an exercise attachment coupled to the mover in the electric linear motor, and a controller configured to control force generated by the electric linear motor, where an amount of force required to move the exercise attachment changes based on the force generated by the electric linear motor, and configured to display information related to moving the exercise attachment.

Abstract: A method includes voltage vector command values for an electric motor implemented on a vehicle and operating in a linear region. The method also includes receiving system state information of the vehicle and determining that an overmodulation threshold is satisfied based on the system state information of the vehicle. Based on determining that the overmodulation threshold is satisfied, the method includes determining a modulation factor from a modulation index, generating a three-phase output based on the voltage vector command values and the modulation factor, and determining a plurality of control signals based on the three-phase output. Each respective control signal of the plurality of control signals corresponds to a respective switch among a plurality of switches of an inverter. The method also includes instructing the plurality of switches of the inverter to control operation of the electric motor in the overmodulation region based on the plurality of control signals.

Abstract: A suspension includes inner magnets coupled to an inner cylindrical member and outer magnets coupled to an outer cylindrical member that circumscribes the inner cylindrical member. The inner magnets are stacked on top of one another in an axial direction and include a first set having a first polarity alternately arrayed with a second set having a second polarity. The outer magnets are stacked on top of one another in the axial direction and include a first set having the first polarity alternately arrayed with a second set having the second polarity. Each inner magnet in the first set is radially aligned with an outer magnet in the second set and each inner magnet in the second set is radially aligned with an outer magnet in the first set to provide an attractive electromagnetic field between the magnets that passively absorbs axial displacement between the inner and outer cylindrical members.

Abstract: A suspension includes inner magnets coupled to an inner cylindrical member and outer magnets coupled to an outer cylindrical member that circumscribes the inner cylindrical member. The inner magnets are stacked on top of one another in an axial direction and include a first set having a first polarity alternately arrayed with a second set having a second polarity. The outer magnets are stacked on top of one another in the axial direction and include a first set having the first polarity alternately arrayed with a second set having the second polarity. Each inner magnet in the first set is radially aligned with an outer magnet in the second set and each inner magnet in the second set is radially aligned with an outer magnet in the first set to provide an attractive electromagnetic field between the magnets that passively absorbs axial displacement between the inner and outer cylindrical members.

Abstract: A method for reducing switching losses while an inverter performs discontinuous pulse width modulation includes receiving rotor angle measurements of an electric motor and generating, using the rotor angle measurements of the electric motor, a three-phase output. The method also includes receiving system state information of the vehicle, determining an angle shift based on the system state information of the vehicle, and determining a plurality of control signals based on the three-phase output and the angle shift. Each respective control signal of the plurality of control signals corresponds to a respective switch among a plurality of switches of the inverter. The method also includes instructing the plurality of switches of the inverter to control operation of the electric motor based on the plurality of controls signals.

Abstract: A method includes receiving an indication of a charging current received at an on-board charging circuit of a vehicle from a source having a charging voltage. The on-board charging circuit includes a multi-phase traction motor, an inverter electrically coupled to the multi-phase traction motor and including an upper set of switching elements and a lower set of switching elements, and an energy storage device (ESD) electrically coupled to the inverter and having a storage voltage. The method includes determining whether the charging voltage is greater than or equal to the storage voltage. When the charging voltage is greater than or equal to the storage voltage, the method includes instructing at least one switching element in the upper set to operate in an on state and all of the switching elements in the lower set in an off state to cause fast charging of the ESD using the charging current.

Abstract: A rotor-wheeled motor assembly includes a wheel that includes a rim coaxial with an axis of rotation of the wheel and circumscribing an interior region of the wheel. The rim has a tire mounting surface and an interior radial surface on an opposite side than the tire mounting surface and opposing the interior region. The tire mounting surface is configured to mount the wheel to a vehicle hub assembly. An electric motor is disposed within the interior region and includes a rotor disposed on or embedded into the tire mounting surface. The rotor is configured to rotate in unison with the tire mounting surface about the axis of rotation along a plane perpendicular to the axis of rotation. A stator assembly includes a stator core and stator windings. The stator windings axially oppose the rotor to define an axial flux air gap separating the rotor and the stator windings.

Abstract: Techniques for strength training using an exercise system including an electric linear motor. The exercise system includes a stand, including the electric linear motor comprising a mover and a rotor, and a user interface. The exercise system further includes an exercise attachment coupled to the mover in the electric linear motor, and a controller configured to control force generated by the electric linear motor, where an amount of force required to move the exercise attachment changes based on the force generated by the electric linear motor, and configured to display information related to moving the exercise attachment.