Abstract: Systems and methods for controlling a dual active bridge converter are disclosed herein. An environmental condition associated with an electric charger for an electric vehicle may be determined, where the electric charger comprises a dual active bridge converter. Based on the environmental condition associated with the electric charger, the dual active bridge converter may be caused to enter a heat generation mode that causes the dual active bridge converter to generate heat to ameliorate the environmental condition associated with the electric charger.

Abstract: Aspects of this technical solution can a first direct-current (DC) circuit to couple with a DC battery of an electric vehicle, a capacitor of the first DC circuit configured to charge to a capacitance that satisfies a threshold of activation of a second DC circuit, and the first DC circuit to transmit, in response to a determination that the capacitor satisfies the threshold of activation of the second DC circuit, DC power between the battery of the electric vehicle and the second DC circuit.

Abstract: Energy conversion is provided. An energy conversion device can include one or more power delivery interfaces. The energy conversion device can include a pre-charge circuit configured to charge a capacitor to an operating voltage. The energy conversion device can include a user accessible interface configured to provide energy to the pre-charge circuit. The pre-charge circuit can charge the capacitor associated with the one or more power delivery interfaces. The user-accessible interfaces can include a direct current (DC) input. The user-accessible interfaces can include an alternating current (AC) input.

Abstract: Systems and methods for operating a PEM including control circuitry are provided herein. The operation includes detecting, using the control circuitry, a drop in output current of the PEM, detecting, using the control circuitry, an increase in output voltage of the PEM, and in response to detecting the drop in output current and detecting the increase in output voltage, turning off the PEM using the control circuitry. Turning off the PEM may protect circuitry of the PEM from an interruption of a continuous power flow.

Abstract: Solid-state autotransformers are provided. A system can include a first switch coupled to a first line in which an alternating current signal is conveyed. The system can include a second switch coupled to a second line in which the alternating current signal is conveyed. The second switch can be coupled to the first switch. The first switch can, responsive to a magnitude of a first voltage from the first line to a terminal exceeding a magnitude of a second voltage from the second line to the terminal, pass current from the first line to the terminal. The second switch can, responsive to the magnitude of the second voltage exceeding the magnitude of the first voltage, pass current from the second line to the terminal.

Abstract: Systems and methods for controlling a dual active bridge converter or other type of DC-DC converter are disclosed herein. An output voltage of the dual active bridge converter is detected. Based at least in part on the output voltage, a first target duty ratio of a primary bridge of the dual active bridge converter and a second target duty ratio of a secondary bridge of the dual active bridge converter are retrieved from a table. Based on the output voltage, a target phase shift between the primary bridge and the secondary bridge is determined. Based on the first target duty ratio, the second target duty ratio, and the target phase shift, a plurality of switch control signals is caused to be provided to respective switches of the primary bridge and the secondary bridge, to switch according to a time-based switching sequence.

Abstract: Systems and methods for determining the health of a transformer are provided herein. A system includes a transformer, a capacitor, and control circuitry configured to discharge the capacitor across the transformer, measure a voltage across the capacitor, and determine a health of the transformer based on the measured voltage. In some embodiments, a magnetizing inductance of the transformer is determined based on the measured voltage, and the health of the transformer is determined by comparing the determined magnetizing inductance to a reference value. In some embodiments, the transformer is part of a dual active bridge (DAB) converter, and the DAB converter is controlled based on the health of the transformer.

Abstract: Various disclosed embodiments include illustrative controller modules, direct current (DC) fast charging devices, and methods. In an illustrative embodiment, a controller module for a DC-DC converter includes a controller and computer-readable media configured to store computer-executable instructions configured to cause the controller to receive an input voltage Vin to the DC-DC converter, receive an output DC voltage Vo from the DC-DC converter, generate control signals configured to control a charging output of the DC-DC converter responsive to the received input voltage Vin and output voltage Vo, and output the generated control signals to the DC-DC converter.

Abstract: Solid-state autotransformers are provided. A system can include a first switch coupled to a first line in which an alternating current signal is conveyed. The system can include a second switch coupled to a second line in which the alternating current signal is conveyed. The second switch can be coupled to the first switch. The first switch can, responsive to a magnitude of a first voltage from the first line to a terminal exceeding a magnitude of a second voltage from the second line to the terminal, pass current from the first line to the terminal. The second switch can, responsive to the magnitude of the second voltage exceeding the magnitude of the first voltage, pass current from the second line to the terminal.

Abstract: Aspects of the disclosure relate to a negative bias circuit for power device driving. An apparatus may include a power source, a gate impedance path, a capacitor in series with the gate impedance path, and a clamping circuit for a transistor gate.

Abstract: Various disclosed embodiments include illustrative controller modules, direct current (DC) fast charging devices, and methods. In an illustrative embodiment, a controller module for a DC-DC converter includes a controller and computer-readable media configured to store computer-executable instructions configured to cause the controller to receive an input voltage Vin to the DC-DC converter, receive an output DC voltage Vo from the DC-DC converter, generate control signals configured to control a charging output of the DC-DC converter responsive to the received input voltage Vin and output voltage Vo, and output the generated control signals to the DC-DC converter.

Abstract: Solid-state autotransformers are provided. A system can include a first switch coupled to a first line in which an alternating current signal is conveyed. The system can include a second switch coupled to a second line in which the alternating current signal is conveyed. The second switch can be coupled to the first switch. The first switch can, responsive to a magnitude of a first voltage from the first line to a terminal exceeding a magnitude of a second voltage from the second line to the terminal, pass current from the first line to the terminal. The second switch can, responsive to the magnitude of the second voltage exceeding the magnitude of the first voltage, pass current from the second line to the terminal.

Abstract: Systems and methods are provided for a hybrid power converter connected to an integrated energy storage system (ESS). In some embodiments, the system includes a first direct current to direct current (DC/DC) converter configured to provide DC input power to an ESS in a first mode of operation and to receive stored power from the ESS and provide the stored power to a common DC bus in a second mode of operation, and a second DC/DC converter configured to receive at least a portion of the stored power from the common DC bus and provide it to a load in the second mode of operation.

Abstract: A power stage circuit with multiple bidirectional AC to DC circuits for bidirectional charging is modified to connect the power stage converters in series for DC to AC applications. The power stage circuit can covert a DC input from a DC power source of a vehicle to an AC output for a power outlet of the vehicle. The power stage circuit uses two lines with a 120 VAC at the power outlet. Using a common neutral line, the AC to DC circuits are connected together to form a split phase power output, and the 120 VAC lines are 180 degrees out of phase to create a 240 VAC source at the power outlet.

Abstract: Methods and systems for mitigating EMI for electric vehicle chargers are disclosed. In some embodiments, the system comprises a power cabinet comprising a first PEM for charging a first electric vehicle and a second PEM for charging the first vehicle or a second electric vehicle. The first PEM and second PEM may be switched at different frequencies. In some embodiments, a difference between a first frequency of the first PEM and a second frequency of the second PEM is greater than a noise sampling frequency.

Abstract: Systems and methods for operating an asymmetric power converter for improved efficiency, service life, and operation are provided herein. In some embodiments, the system includes a power electronics module (PEM) configured to convert between alternating current (AC) power and direct current (DC) power. The power electronics module includes a power converter having a nominal power rating, and an overrated power converter having an overrated power rating with respect to the nominal power rating, wherein the power converter is one of an AC to DC power converter and a DC to DC power converter and the overrated power converter is the other of the AC to DC power converter and the DC to DC power converter.

Abstract: Systems and methods for operating a PEM including control circuitry are provided herein. The operation includes detecting, using the control circuitry, a drop in output current of the PEM, detecting, using the control circuitry, an increase in output voltage of the PEM, and in response to detecting the drop in output current and detecting the increase in output voltage, turning off the PEM using the control circuitry. Turning off the PEM may protect circuitry of the PEM from an interruption of a continuous power flow.

Abstract: A system can include a controller. The controller can receive a signal from a charger that indicates a voltage drop in a voltage received by the charger from a power supply. The controller can operate the power supply to increase the voltage output by the power supply responsive to the signal that indicates the voltage drop.

Abstract: A power stage circuit with multiple bidirectional AC to DC circuits for bidirectional charging is modified to connect the power stage converters in series for DC to AC applications. The power stage circuit can covert a DC input from a DC power source of a vehicle to an AC output for a power outlet of the vehicle. The power stage circuit uses two lines with a 120 VAC at the power outlet. Using a common neutral line, the AC to DC circuits are connected together to form a split phase power output, and the 120 VAC lines are 180 degrees out of phase to create a 240 VAC source at the power outlet.

Abstract: Aspects of the disclosure relate to a negative bias circuit for power device driving. An apparatus may include a power source, a gate impedance path, a capacitor in series with the gate impedance path, and a clamping circuit for a transistor gate.