Abstract: A method of controlling an electric machine includes: energizing stator windings of a stator by a stator current, producing a stator magnetic field within the stator by the energized stator windings, modifying a corresponding rotor magnetic field within a ferromagnetic material within a rotor by the stator magnetic field, generating a force tangential to the rotor by a shift in the stator magnetic field, moving the rotor by the generated force tangential to the rotor, resisting a decay of a magnetic flux within the rotor by current within the rotor windings in response to the shift in the stator magnetic field, and achieving a target operational output of the electric machine. The stator magnetic field and the rotor maintain synchronicity with one another during operation of the electric machine.

Abstract: A system may mitigate leakage currents in charging stations for electric vehicles. The system may include a bank of one or more parallel capacitors per phase electrically coupled to an AC voltage source, wherein a neutral point of the one or more parallel capacitors is electrically coupled to a DC ground; a bank of one or more inductors per phase electrically coupled to the one or more parallel capacitors, wherein each inductor is in series with and downstream from one capacitor; a rectifier electrically coupled to and downstream from the one or more parallel inductors, wherein the rectifier converts the AC voltage source to a DC voltage for supply to a battery; a DC bus electrically coupled to the rectifier; and a controller, wherein the controller is configured to mitigate leakage currents by controlling a voltage of at least one of the bank of one or more parallel capacitors.

Abstract: Disclosed are systems, methods, and other implementations, including a method for battery performance analysis and management that includes measuring voltage response data for a lithium-ion battery in response to a bipolar current pulse signal applied to the lithium-ion battery, and determining, based on the measured voltage response data, using a bipolar pulse (BIP) model resultant battery characterization data representative of linear and nonlinear behavior of the lithium-ion battery. The resultant battery characterization data can include a set of multiple parameters of an equivalent circuit representation of the BIP model.

Abstract: Disclosed are methods, systems, devices, and other implementations, including a voltage converter system that includes two or more Active Half Bridge (AHB) converter circuits, each of the two or more AHB converter circuits connected to one or more windings of a transformer, with each AHB converter circuit including one or more switches and one or more energy storage devices. The voltage converter system further includes one or more controllers to control electrical behavior of the two or more AHB converter circuits according to normalized switching functions representing the switching states of the switches of the two or more AHB converter circuits.

Abstract: Disclosed are systems and methods for motor control using piecewise affine modelling. An electronic controller may determine current values for a motor in a rotational reference frame. Each current value may be associated with a dimension of a set of dimensions of the rotational reference frame. The electronic controller may further determine, based on the current values, a flux linkage value for each of the set of dimensions of the rotational reference frame using a piecewise affine map. The electronic controller may further determine a target flux linkage value for each of the set of dimensions of the rotational reference frame. The electronic controller may then control a power switching network coupled between a power supply and the motor based on the flux linkage values and the target flux linkage values.

Abstract: An electric machine includes a stator and a rotor energizable by magnetic fields produced by the stator when receiving a stator current to produce relative motion between the rotor and the stator. A controller is configured to send the stator current through the stator at a current angle measured from the closest one of a pole of the rotor, determine a desired operational output of the electric machine, and determine a desired rotor motion corresponding to the desired operational output of the electric machine. The controller is further configured to calculate a vector control modulation applied to the stator that elicits the desired rotor motion, and adjust the current angle of the stator current based on the vector control modulation to cause the rotor to perform the desired rotor motion and achieve the desired operational output of the electric machine.

Abstract: A reconfigurable electric motor (or machine) that may be reconfigured to improve performance given particular motor conditions. The motor is part of a motor system including a stator, a rotor, a microinverter network including a plurality of microinverters, and a motor controller including processing circuitry. The motor controller controls the plurality of microinverters to drive the motor in accordance with a first configuration of a plurality of motor configurations. The motor controller determines, based on determined motor conditions, to reconfigure the motor from the first configuration to a second configuration, where the first configuration has a first pole count that is different than a second pole count of the second configuration. The motor controller further controls the plurality of microinverters to drive the motor in accordance with the second configuration.

Abstract: A system may mitigate leakage currents in charging stations for electric vehicles. The system may include a bank of one or more parallel capacitors per phase electrically coupled to an AC voltage source, wherein a neutral point of the one or more parallel capacitors is electrically coupled to a DC ground; a bank of one or more inductors per phase electrically coupled to the one or more parallel capacitors, wherein each inductor is in series with and downstream from one capacitor; a rectifier electrically coupled to and downstream from the one or more parallel inductors, wherein the rectifier converts the AC voltage source to a DC voltage for supply to a battery; a DC bus electrically coupled to the rectifier; and a controller, wherein the controller is configured to mitigate leakage currents by controlling a voltage of at least one of the bank of one or more parallel capacitors.

Abstract: Disclosed are implementations that include a power converter system including a non-isolated N-phase DC/AC power converter, for N?1, with a DC voltage section and an N-phase AC voltage section, with the power converter including energy storage arrangements for each of three phases of the AC voltage section. The energy storage arrangements are commonly electrically coupled to the terminals of the DC voltage section. The system further includes a controller to control voltages at the energy storage arrangements, with the controller including one or more switching devices to control voltages at one or more terminals of the energy storage arrangements, and at least one model predictive control (MPC) module to generate control signaling, based on electrical operational characteristics of at least some of storage elements, to actuate the one or more switching devices to establish zero sequence voltage stabilization behavior at the terminals of the energy storage arrangements.

Abstract: Systems and methods for a high-efficiency power converter incorporating a half-bridge topology with one or more an additional upper capacitor and a drain-source capacitor. The converter includes DC voltage terminals and a DC link capacitor coupled across a positive and negative DC terminal of the DC voltage terminals. The converter further includes a power switching element pair including a high side switch and a low side switch coupled together at a midpoint node. The converter further includes an LC filter having a switch-side inductor, a lower capacitor coupled between a second end of switch-side inductor and the negative DC terminal; and an upper capacitor coupled between the second end of the switch-side inductor and the positive DC terminal. The converter may further include drain-source capacitors coupled across the drain and source terminals of the switches.

Abstract: A reconfigurable electric motor (or machine) that may be reconfigured to improve performance given particular motor conditions. The motor is part of a motor system including a stator, a rotor, a microinverter network including a plurality of microinverters, and a motor controller including processing circuitry. The motor controller controls the plurality of microinverters to drive the motor in accordance with a first configuration of a plurality of motor configurations. The motor controller determines, based on determined motor conditions, to reconfigure the motor from the first configuration to a second configuration, where the first configuration has a first pole count that is different than a second pole count of the second configuration. The motor controller further controls the plurality of microinverters to drive the motor in accordance with the second configuration.

Abstract: A reconfigurable electric motor (or machine) that may be reconfigured to improve performance given particular motor conditions. The motor is part of a motor system including a stator, a rotor, a microinverter network including a plurality of microinverters, and a motor controller including processing circuitry. The motor controller controls the plurality of microinverters to drive the motor in accordance with a first configuration of a plurality of motor configurations. The motor controller determines, based on determined motor conditions, to reconfigure the motor from the first configuration to a second configuration, where the first configuration has a first pole count that is different than a second pole count of the second configuration. The motor controller further controls the plurality of microinverters to drive the motor in accordance with the second configuration.

Abstract: Disclosed are implementations that include a power converter system and method including an N-phase power converter stage having to an alternating current (AC) side and a direct current (DC) side, with N?1. The system and method further include an N-phase LC filter comprising one or more capacitors, wherein respective one or more neutral points of the one or more capacitors are electrically connected to a DC negative terminal of a DC source. A control system drives power switching elements of the N-phase power converter stage to convert received power and to output converted power. The control system drives the power switching elements using variable frequency soft switching at a frequency of at least 20 kHz. The power converter may have bidirectional operation to operate in a traction mode to drive a motor or a charging mode to charge a DC source.

Abstract: Disclosed are implementations that include a non-isolated power converter system comprising a filter including an inductor and a capacitor. The inductor of the filter includes a core portion and a winding portion. The core portion may include different shape core structures. The winding portion includes a winding embedded within a printed circuit board. The printed circuit board winding may include a litz wiring, and the printed circuit board having located thereon one or more of a controller or power switching elements.

Abstract: An electric machine includes a stator and a rotor energizable by magnetic fields produced by the stator when receiving a stator current to produce relative motion between the rotor and the stator. A controller is configured to send the stator current through the stator at a current angle measured from the closest one of a pole of the rotor, determine a desired operational output of the electric machine, and determine a desired rotor motion corresponding to the desired operational output of the electric machine. The controller is further configured to calculate a vector control modulation applied to the stator that elicits the desired rotor motion, and adjust the current angle of the stator current based on the vector control modulation to cause the rotor to perform the desired rotor motion and achieve the desired operational output of the electric machine.

Abstract: An electric machine includes a stator defining multiple stator poles with associated stator windings configured to receive a stator current. The electric machine also includes a rotor defining multiple fixed rotor poles with associated rotor windings, wherein the rotor defines a field energizable by magnetic fields produced by the stator windings when receiving the stator current to produce relative motion between the rotor and the stator and wherein the rotor is maintained in synchronicity with the magnetic fields produced by the stator during operation of the electric machine. The electric machine also includes a rectification system configured control against an alternating current being induced in the rotor poles as the field is energized by magnetic fields produced by the stator windings when receiving the stator current.

Abstract: A stator defines multiple stator poles with associated stator windings. A rotor defines multiple rotor poles with associated rotor windings configured to be energized substantially by the stator. The rotor defines a rotor field energizable by magnetic fields produced by the stator windings to produce relative force between the rotor and the stator. An active rectifier is conductively coupled to one or more first rotor windings. The active rectifier is configured to control a direction of current flow through the one or more first rotor windings responsive to a signal received wirelessly from the stator by one or more second rotor windings.

Abstract: A stator defines multiple stator poles with associated stator windings. A rotor defines multiple fixed rotor poles with associated teeth with a ferromagnetic material. The fixed rotor poles have associated rotor windings configured to be energized substantially by the stator. Each of the rotor windings is associated with the tooth. Each of the rotor windings includes an alternating current (AC) coil (or auxiliary coil) configured to carry an AC current induced by an AC current flowing in the stator. A direct current (DC) coil (or primary coil) defines a rotor field energizable by magnetic fields produced by the stator windings to produce relative forces between the rotor and the stator. The DC coil is at least partially powered or controlled by the AC coil.

Abstract: An electric machine includes a stator defining multiple stator poles with associated stator windings configured to receive a stator current. The electric machine also includes a rotor defining multiple fixed rotor poles with associated rotor windings, wherein the rotor defines a field energizable by magnetic fields produced by the stator windings when receiving the stator current to produce relative motion between the rotor and the stator and wherein the rotor is maintained in synchronicity with the magnetic fields produced by the stator during operation of the electric machine. The electric machine also includes a rectification system configured control against an alternating current being induced in the rotor poles as the field is energized by magnetic fields produced by the stator windings when receiving the stator current.

Abstract: Disclosed are systems, methods, and other implementations, including a method for managing battery performance that includes measuring voltage response data for a lithium-ion battery in response to a current pulse perturbation injected into the lithium-ion battery, and determining in real-time, based on the measured voltage response data, resultant degradation data representative of estimated physical degradation of the lithium-ion battery.