Abstract: A device includes a printed circuit board (PCB). The device may also include a high voltage coil disposed on the PCB and a low voltage coil disposed on the PCB. Further, a conductive shield forms a three-dimensional enclosure around the high voltage coil and confines an electric field generated by the device to the PCB.

Abstract: A system may include a controller that may control operations of a device according to a control loop and characterize a frequency response of the device while the device is operating. The controller may characterize the frequency response by adding a perturbation signal to any signal in the control loop. The controller may then determine a first transformed signal by performing a first discrete Fourier transform on a first signal in the control loop at a frequency of the perturbation signal and determine a second transformed signal by performing a second discrete Fourier transform on a second signal in the control loop at the frequency of the perturbation signal. The controller may then determine the frequency response at the frequency by comparing a first amplitude and a first phase of the first transformed signal to a second amplitude and a second phase of the second transformed signal.

Abstract: A device includes a printed circuit board (PCB). The device may also include a high voltage coil disposed on the PCB and a low voltage coil disposed on the PCB. Further, a conductive shield forms a three-dimensional enclosure around the high voltage coil and confines an electric field generated by the device to the PCB.

Abstract: A method for detecting a grid event is provided. The method includes sampling grid voltage and grid current over a fixed period of time; determining grid impedance at one or more frequencies using the sampled grid voltage and the sampled grid current; comparing the grid impedance at the one or more frequencies to a known expected grid impedance at the one or more frequencies; and detecting a grid event based on the comparison.

Abstract: A device includes a printed circuit board (PCB). The device may also include a high voltage coil disposed on the PCB and a low voltage coil disposed on the PCB. Further, a conductive shield forms a three-dimensional enclosure around the high voltage coil and confines an electric field generated by the device to the PCB.

Abstract: A power converter includes a first phase leg including a first di/dt reactor and a first control section, the first di/dt reactor and the first control section being coupled between an active line and a neutral line. The power converter also includes a first current crowbar coupled between the active line and the neutral and a controller coupled to the first di/dt reactor, the control section and the first current crowbar and configured to activate the current crowbar based on a voltage across the first di/dt reactor.

Abstract: A system may include a controller that may control operations of a device according to a control loop and characterize a frequency response of the device while the device is operating. The controller may characterize the frequency response by adding a perturbation signal to any signal in the control loop. The controller may then determine a first transformed signal by performing a first discrete Fourier transform on a first signal in the control loop at a frequency of the perturbation signal and determine a second transformed signal by performing a second discrete Fourier transform on a second signal in the control loop at the frequency of the perturbation signal. The controller may then determine the frequency response at the frequency by comparing a first amplitude and a first phase of the first transformed signal to a second amplitude and a second phase of the second transformed signal.

Abstract: A device includes a printed circuit board (PCB). The device may also include a high voltage coil disposed on the PCB and a low voltage coil disposed on the PCB. Further, a conductive shield forms a three-dimensional enclosure around the high voltage coil and confines an electric field generated by the device to the PCB.

Abstract: A power converter includes a plurality of power conversion modules. At least one power conversion module includes a plurality of power conversion devices defining a three-level bridge. A first power conversion module includes four terminals including one of a positive terminal and a negative terminal, an output terminal, a first neutral terminal, and a second neutral terminal. The first neutral terminal is coupled to a direct current (DC) link and the second neutral terminal is coupled to a second power conversion module.

Abstract: An apparatus and method for improved current shunt sensing in an electrical system, such as a renewable energy electrical system, is disclosed. A current shunt according to aspects of the present disclosure includes a conductive portion that is placed in series with an electrical system The current shunt includes a sensing element that is used to measure the voltage across the conductive portion of the current shunt. The sensing element has an increased width relative to the width of the conductive portion of the shunt. The increased width of the sensing element provides for improved current shunt sensing that results in more accurate voltage (and thus current) measurements across a wide range of frequencies.

Abstract: A phase leg for a three-level power converter includes a heat sink device that includes a first surface and a second surface opposite the first surface. The phase leg also includes a first portion including at least one semiconductor switching device coupled to the first surface. The phase leg further includes a second portion including at least one semiconductor switching device coupled to the second surface.

Abstract: A heat sink assembly includes a base plate coupled to a first side of an electronic device. A plurality of fins extend from the base plate and are positioned within a housing. The housing includes a first manifold defining a plurality of first passages and a second manifold defining a plurality of second passages in fluid communication with the plurality of first passages. At least one of the plurality of first passages extends between an adjacent pair of the plurality of second passages and is oriented to channel fluid toward at least one of the plurality of fins.

Abstract: Disclosed is a mechanical layout for a half-bride power module that is optimized for low inductance. In one embodiment, a first power module and a second power module are mounted on each side of a heat sink. An inductance cancelling bus bar is wrapped around the heat sink, the first power module and the second power module in a loop.

Abstract: A method for detecting a grid event is provided. The method includes sampling grid voltage and grid current over a fixed period of time; determining grid impedance at one or more frequencies using the sampled grid voltage and the sampled grid current; comparing the grid impedance at the one or more frequencies to a known expected grid impedance at the one or more frequencies; and detecting a grid event based on the comparison.

Abstract: Disclosed is a mechanical layout for a half-bride power module that is optimized for low inductance. In one embodiment, a first power module and a second power module are mounted on each side of a heat sink. An inductance cancelling bus bar is wrapped around the heat sink, the first power module and the second power module in a loop.

Abstract: A power converter includes a plurality of power conversion modules. At least one power conversion module includes a plurality of power conversion devices defining a three-level bridge. A first power conversion module includes four terminals including one of a positive terminal and a negative terminal, an output terminal, a first neutral terminal, and a second neutral terminal The first neutral terminal is coupled to a direct current (DC) link and the second neutral terminal is coupled to a second power conversion module.

Abstract: A phase leg for a three-level power converter includes a heat sink device that includes a first surface and a second surface opposite the first surface. The phase leg also includes a first portion including at least one semiconductor switching device coupled to the first surface. The phase leg further includes a second portion including at least one semiconductor switching device coupled to the second surface.

Abstract: Embodiments provide systems and methods for controlling electronic circuitry. A system can include at least a first controller and a second controller and at least one power electronic circuitry module. The first controller can be in electrical communication with the power electronic circuitry module via a first high-speed serial link (HSSL). The second controller can be in electrical communication with the power electronic circuitry module via a second HSSL.

Abstract: An apparatus and method for improved current shunt sensing in an electrical system, such as a renewable energy electrical system, is disclosed. A current shunt according to aspects of the present disclosure includes a conductive portion that is placed in series with an electrical system The current shunt includes a sensing element that is used to measure the voltage across the conductive portion of the current shunt. The sensing element has an increased width relative to the width of the conductive portion of the shunt. The increased width of the sensing element provides for improved current shunt sensing that results in more accurate voltage (and thus current) measurements across a wide range of frequencies.

Abstract: A heat sink assembly includes a base plate coupled to a first side of an electronic device. A plurality of fins extend from the base plate and are positioned within a housing. The housing includes a first manifold defining a plurality of first passages and a second manifold defining a plurality of second passages in fluid communication with the plurality of first passages. At least one of the plurality of first passages extends between an adjacent pair of the plurality of second passages and is oriented to channel fluid toward at least one of the plurality of fins.