Abstract: A multi-level inverter control system includes a power storage system having a high voltage terminal, a low voltage terminal, and an intermediate voltage terminal. The intermediate voltage terminal is at a voltage between the high voltage terminal and the low voltage terminal. A multi-level inverter includes a plurality of switches, a high voltage input connected to the high voltage terminal, a low voltage input connected to the low voltage terminal, and an intermediate voltage input connected to the intermediate voltage terminal. A controller is controllably coupled to the multi-level inverter. The controller includes at least a processor and a memory. The memory stores instructions configured to cause the controller to operate the multi-level inverter in a three-level inverter mode, a full power two-level inverter mode, a first partial power two-level inverter mode and a second partial power two-level inverter mode.

Abstract: A system for modular dynamically adjustable capacity storage for a vehicle is provided. The system includes a battery pack including a plurality of battery cells, a negative terminal including a chassis ground connection, and a plurality of positive battery pack terminals. The negative terminal and the plurality of positive battery pack terminals are useful for connecting at least one electrical circuit through the battery pack. The system further includes a battery cell switching system, including a plurality of solid-state switches connected to each of the battery cells. The plurality of solid-state switches is operable to selectively connect a portion of the battery cells in parallel, selectively connect the portion of the battery cells in series, and selectively connect one of the plurality of battery cells to one of the plurality of positive battery pack terminals.

Abstract: A system includes an inverter configured to output multiphase alternating current (AC) currents to an electric motor, the multiphase AC currents including a first phase current and a second phase current, the inverter including a set of switches for each phase current. The system also includes a switching controller operably connected to each set of switches, the switching controller configured to control a gate driver connected to a switch of the set of switches, the switching controller configured to determine a time difference between a first switching event of a first phase and a second switching event of a second phase during a switching cycle, and control a switching speed of the switch based on the time difference.

Abstract: A system for controlling a propulsion system of a vehicle includes a switching system including a first switching device connecting a battery system to a first set of windings of an electric motor, and a second switching device connecting the battery system to a second set of windings. The system also includes a controller configured to transition the propulsion system from an initial propulsion mode in which an initial voltage is applied to the electric motor, to a target mode in which a target voltage is applied. The transitioning includes controlling the first switching device to provide current to the first set of windings at the initial voltage to produce torque, and subsequently controlling the second switching device to cause the battery system to apply the target voltage to the second set of windings while the current is provided to the first set of windings at the initial voltage.

Abstract: A system for controlling a propulsion system of a vehicle includes a switching system including a first switching device connecting a battery system to a first set of windings of an electric motor, and a second switching device connecting the battery system to a second set of windings. The system also includes a controller configured to transition the propulsion system from an initial propulsion mode in which an initial voltage is applied to the electric motor, to a target mode in which a target voltage is applied. The transitioning includes controlling the first switching device to provide current to the first set of windings at the initial voltage to produce torque, and subsequently controlling the second switching device to cause the battery system to apply the target voltage to the second set of windings while the current is provided to the first set of windings at the initial voltage.

Abstract: An electric vehicle includes a drive system that performs a method of transferring power between a vehicle and an external location. The drive system includes a battery, a rectifier, and a processor. The rectifier is one of a two-level rectifier and a multi-level rectifier. The processor is configured to connect the rectifier between an alternating current (AC) port of an outlet of an external location and the battery. The rectifier is configured to convert between an AC power at the AC port on an external side of the rectifier and a direct current (DC) power at a vehicle side of the rectifier in order to transfer power bi-directionally between the external location and the battery.

Abstract: Some embodiments disclosed herein are directed to constraint handling for parameters of electric motors. In particular, embodiments of the present disclosure relate to handling constraints for parameters such as current, voltage, and torque associated with an electric motor. Other embodiments may be disclosed or claimed.

Abstract: A system includes an electronic device including a circuit having a semiconductor switch, and a switching control system operably connected to the semiconductor switch. The switching control system is configured to control a switching speed of the semiconductor switch based on a received voltage by altering at least one of a gate resistance and a gate capacitance of the semiconductor switch.

Abstract: A vehicle includes two or more battery packs configured to power a motor. A controller is configured to dynamically activate an operational mode during operation. The operational mode is one of multiple possible operational modes including a first operational mode defining a series connection between the two or more battery packs and second operational mode defining a parallel connection between the two or more battery packs. The connection between the battery packs is controlled by a first plurality of switches. A plurality of low voltage loads are connected to a subset of the battery packs in the battery packs such that a power output of the subset of the battery packs provides full power to the plurality of low voltage loads. The plurality of low voltage loads are connected to only the subset of the battery packs in both the first operational mode and the second operational mode.

Abstract: An energy transfer system of a vehicle includes a multi-winding motor, a first inverter connected to a first set of windings, and a second inverter connected to a second set of windings. The system includes a controller configured to control the first inverter and the second inverter to control a charging current through the multi-winding motor at a desired power when the multi-winding motor is in a zero-torque condition. The controller is configured to control the charging current through the first inverter and second inverter so that a first current vector associated with the first set of windings and a second vector associated with the second set of windings are symmetric about a d-axis and the multi-winding motor functions as a transformer, the control of the first inverter and the second inverter providing for power transfer between the first set of windings and the second set of windings.

Abstract: A motor system includes a rechargeable energy storage system, an alternating current motor, and a power inverter. Multiple efficiency maps may be provided, each representing a specific combination of control parameters and associated settings. The maps relate the motor's operating space (torque and speed) to corresponding efficiency solutions. The combination of control parameters and settings that yields the highest motor system efficiency at an operating point may be determined from the multiple efficiency maps and used in controlling the motor.

Abstract: A modulation strategy for maximization of battery heating efficiency is provided. A system includes an inverter coupled to a high voltage battery and a motor. A control system is coupled to the inverter. The control system is configured to control the inverter to output a first electrical current having a first triangular waveform to the motor, a second electrical current having a second triangular waveform to the motor, and a third electrical current to the motor. The first and second triangular waveforms are out of phase.

Abstract: A power control system for a battery system of a vehicle includes one or more supplemental protection devices that are connected to at least one of a first contactor, a second contactor, one of N fuses, and one of N vehicle loads. A battery management module is configured to measure and store a plurality of state of health parameters for the battery system and to selectively operate the one or more supplemental protection devices in a coverage gap between first and second coverage areas handled by the first contactor and the second contactor and the N fuses based on a calibration function and/or calibration parameters. A telematics system selectively sends the plurality of state of health parameters for the battery system to a remote server and to receive at least one of a new calibration function and new calibration parameters for the vehicle from the remote server.

Abstract: An electric vehicle includes an electrical system and performs a method of charging the electric vehicle. The electrical system includes a first battery subpack, a second battery subpack, wherein the first battery subpack, the second battery subpack, and an electrical load of the electric vehicle are connected in parallel, and a processor. The processor is configured to control a first connection between the first battery subpack and a first charge port and a second connection between the second battery subpack and a second charge port to charge each of the first battery subpack and the second battery subpack while providing power to the electrical load.

Abstract: Embodiments include an electric motor having asymmetric-turn windings and a vehicle including the same. The electric motor includes a rotor and a stator having a first set of windings having a first number of turns and a second set of windings having a second number of turns that is different than the first number of turns. The first set of windings are galvanically isolated from the second set of windings.

Abstract: Techniques are provided for torque ripple mitigation. In one embodiment, the techniques involve determining a first torque ripple at a torque output of a target electrical machine, upon determining that the first torque ripple exceeds a threshold, reproducing the torque output based on a pair of gamma control sets, determining a second torque ripple at the reproduced torque output, upon determining that the second torque ripple falls below the threshold, generating qualified gamma controls based on the gamma control sets, and supplying the qualified gamma controls to the target electrical machine.

Abstract: An electric drive system for an electric vehicle is provided. The electric drive system includes a first electric drive, a second electric drive, and a switchable battery including at least two battery packs that are selectively arranged in one of a series configuration and a parallel configuration. The electric drive system also includes a first half-bridge buck converter connecting the first electric drive to a first battery back of the at least two battery packs of the switchable battery and a second half-bridge buck converter connecting the second electric drive to a second battery back of the at least two battery packs of the switchable battery. The electric drive system further includes a controller configured to control the configuration of the switchable battery, an operation of the first half-bridge buck converter, and the second half-bridge buck converter.

Abstract: A method and apparatus for heating a battery pack in an electrified vehicle provides a zero d-axis current command and a zero q-axis current command to a field-oriented controller for an alternating current (AC) motor coupled to the battery pack through a power inverter module controlled by the field-oriented controller. An AC signal is injected onto the d-axis of the field-oriented controller resulting in an AC current through the battery pack effecting AC resistance heating.

Abstract: A vehicle, arc fault protection device of the vehicle and a method for mitigating an arc fault in an electrical system of the vehicle. The arc fault protection device includes a sensor, a switch, and a processor. The sensor is used for measuring a current in an electrical system. The processor is configured to determine a precursor phase of an arc fault from the current, wherein the precursor phase indicates an onset of an arc flash phase of the arc fault. The processor opens the switch to mitigate the arc fault during the arc flash phase.

Abstract: A vehicle having an ambient temperature sensor, a low voltage lithium-ion battery and a controller is provided. The controller is configured to monitor the ambient temperature sensor and based on a determination that an ambient temperature is below a threshold value, provide an alternating current power to the low voltage lithium-ion battery. The alternating current power causes the low voltage lithium-ion battery to heat.