Abstract: Within a direct current hybrid circuit breaker (DC HCB), a commutation unit (CU) is provided in a semiconductor switch path in series with a semiconductor switch to facilitate opening the DC HCB. The semiconductor switch path is connected in parallel with a mechanical switch path that includes a mechanical switch. The CU is a controlled voltage source which applies a reverse biased voltage on the semiconductor switch path. The CU causes the current through the mechanical switch to ramp down while the current through the semiconductor switch ramps up to a supply current. The CU maintains the current through the mechanical switch to remain at a zero vale by compensating for the voltage drop across the semiconductor switch and the self-inductance of the semiconductor switch path. The mechanical switch can open without current and against no recovery voltage.

Abstract: The disclosure relates to a devices, systems and methods implementing a single transformer-based gate driver. In one embodiment, single transformer-based gate driver includes an RF source; a PWM controller; an edge detector and pulse generating circuit operably connected to the RF source and PWM controller; a transformer comprising a primary side and a secondary side, the primary side of the transformer operably connected to an output of the edge detector and pulse generating circuit, the secondary side of the transformer operably connected to a rectifier circuit and a signal recovery circuit; and a drive circuit operably connected to the rectifier circuit and the signal recovery circuit.

Abstract: Within a direct current hybrid circuit breaker (DC HCB), a capacitance is provided in a semiconductor switch path in series with a semiconductor switch and the semiconductor switch is in parallel with a surge arrestor to facilitate opening the DC HCB. The semiconductor switch path is connected in parallel with a mechanical switch path that includes a mechanical switch. The circuit causes the current through the mechanical switch to ramp down while the current through the semiconductor switch ramps up to a supply current. The mechanical switch can open without current and against no recovery voltage.

Abstract: The disclosure relates to a devices, systems and methods implementing a single transformer-based gate driver. In one embodiment, single transformer-based gate driver includes an RF source; a PWM controller; an edge detector and pulse generating circuit operably connected to the RF source and PWM controller; a transformer comprising a primary side and a secondary side, the primary side of the transformer operably connected to an output of the edge detector and pulse generating circuit, the secondary side of the transformer operably connected to a rectifier circuit and a signal recovery circuit; and a drive circuit operably connected to the rectifier circuit and the signal recovery circuit.

Abstract: The disclosure relates to a devices, systems and methods implementing a single transformer-based gate driver. In one embodiment, single transformer-based gate driver includes an RF source; a PWM controller; an edge detector and pulse generating circuit operably connected to the RF source and PWM controller; a transformer comprising a primary side and a secondary side, the primary side of the transformer operably connected to an output of the edge detector and pulse generating circuit, the secondary side of the transformer operably connected to a rectifier circuit and a signal recovery circuit; and a drive circuit operably connected to the rectifier circuit and the signal recovery circuit.

Abstract: In an embodiment, a computer-implemented method provides mechanisms for load balancing of L2VPN traffic over multiple IPsec VPN tunnels. In an embodiment, a method comprises: performing, by a gateway, a lookup of available virtual tunnel interfaces (“VTIs”) implemented in the gateway to determine a plurality of VTIs; generating a hash value from contents of one or more inner headers of the packet; based on the hash value, determining a VTI device identifier; wherein the VTI device identifier uniquely identifies a particular VTI from the plurality of VTIs; and relaying the packet on a gateway output port that is associated with the particular VTI to allow forwarding of the packet via a particular IPsec VPN tunnel of a plurality of IPsec VPN tunnels.

Abstract: An objective of the present invention is to provide a method for determining and controlling a robot to move straightly on a sloping plane to solve a technical issue that a deviation of a conventional robot from a predetermined straight path is difficult to detect when the robot moves on a sloping plane and cannot be corrected, and moving on the straight path is difficult to guarantee.

Abstract: Provided are a positioning device for a solar panel cleaning robot (100) and a positioning method thereof. The positioning device is used to obtain a real-time position of a vehicle body (10) on a solar panel (200). The positioning device comprises an image acquisition unit (11), a border recognition unit (12), a latitude and longitude recognition unit (13), a vehicle body position calculation unit (14), an image acquisition unit position calculation unit (15), a vehicle body center point position calculation unit (16), a GPS unit (17), a panel determination unit (18), a wireless communication unit (19) and a memory (20).

Abstract: Certain embodiments described herein are generally directed to methods and apparatus for providing a security parameter index (SPI) value for use in establishing a security association between a source tunnel endpoint and a destination tunnel endpoint. In some embodiments, utilization of the SPI bit space is optimized to allow the scaling of key policies within a network. In some embodiment, using an SPI derivation formula, a server in the network is able to generate SPI values whose bit spaces are optimized to allow key policies to scale out.

Abstract: Within a direct current hybrid circuit breaker (DC HCB), a commutation unit (CU) is provided in a semiconductor switch path in series with a semiconductor switch to facilitate opening the DC HCB. The semiconductor switch path is connected in parallel with a mechanical switch path that includes a mechanical switch. The CU is a controlled voltage source which applies a reverse biased voltage on the semiconductor switch path. The CU causes the current through the mechanical switch to ramp down while the current through the semiconductor switch ramps up to a supply current. The CU maintains the current through the mechanical switch to remain at a zero vale by compensating for the voltage drop across the semiconductor switch and the self-inductance of the semiconductor switch path. The mechanical switch can open without current and against no recovery voltage.

Abstract: In various embodiments the invention is directed to a structured filament for use in fused filament fabrication comprising an inner core comprising an first polymer or polymer blend; and an outer shell surrounding said inner core comprising a second polymer or polymer blend having ionic or crystalline functionality; wherein said first polymer or polymer blend has a higher solidification temperature than said second polymer or polymer blend. The ionic or crystalline functionality of the outer shell material strengthen the interface between the printed layers. This structured filament leads to printed 3D structures having improved dimensional fidelity and impact resistance in comparison to the individual components. The impact resistance of structures printed from these is greatly increased as energy is dissipated by delamination of the shell from the core near the crack tip, while the core remains intact to provide stability to the part after impact.

Abstract: An objective of the present invention is to provide a method for determining and controlling a robot to move straightly on a sloping plane to solve a technical issue that a deviation of a conventional robot from a predetermined straight path is difficult to detect when the robot moves on a sloping plane and cannot be corrected, and moving on the straight path is difficult to guarantee.

Abstract: Certain embodiments described herein are generally directed to methods and apparatus for providing a security parameter index (SPI) value for use in establishing a security association between a source tunnel endpoint and a destination tunnel endpoint. In some embodiments, utilization of the SPI bit space is optimized to allow the scaling of key policies within a network. In some embodiment, using an SPI derivation formula, a server in the network is able to generate SPI values whose bit spaces are optimized to allow key policies to scale out.

Abstract: A securing apparatus configured to mount a data storage device in an enclosure includes a shielding assembly configured to be secured to a panel of the enclosure and a sliding pole. The shielding assembly includes a frame and a rotating plate rotatably mounted to the frame. The sliding pole is slidably mounted to the frame and defines a plurality of latching slots. The frame defines an aperture for the data storage device to pass through; the rotating plate comprises a plurality of hooks. The sliding pole is slidable relative to the frame to engage the hooks in the latching slots. The rotating plate is secured to the frame and shields the aperture, preventing the data storage device from being taken out of the enclosure.

Abstract: A securing apparatus configured to mount a data storage device in an enclosure includes a shielding assembly configured to be secured to a panel of the enclosure and a sliding pole. The shielding assembly includes a frame and a rotating plate rotatably mounted to the frame. The sliding pole is slidably mounted to the frame and defines a plurality of latching slots. The frame defines an aperture for the data storage device to pass through; the rotating plate comprises a plurality of hooks. The sliding pole is slidable relative to the frame to engage the hooks in the latching slots. The rotating plate is secured to the frame and shields the aperture, preventing the data storage device from being taken out of the enclosure.

Abstract: One or more values associated with a first configuration setting for a first circuit may be stored in a first set of one or more registers when an operation of the first circuit is based at least in part on one or more values associated with a second configuration setting stored in a second set of one or more registers. In response to receiving an indication of a change in an operating frequency or voltage of the first circuit, the one or more values stored in the second set of one or more registers may be changed by loading the one or more values associated with the first configuration setting stored in the first set of one or more registers into the second set of one or more registers in a parallel fashion.

Abstract: A multi-channel memory system has a memory device, a plurality of channels, and a control circuit. The memory device has a plurality of memory storage spaces. The channels are coupled to the memory storage spaces, respectively, wherein each of the channels is configured to act as a memory interface for accessing a corresponding memory storage space independently. The control circuit controls clock frequencies of clocks on the channels, respectively. At a same time point, the channels include at least a first channel operating at a first clock frequency set by the control circuit and a second channel operating at a second clock frequency set by the control circuit at a same time point, and the second clock frequency is different from the first clock frequency.

Abstract: A multi-channel memory system has a memory device, a plurality of channels, and a control circuit. The memory device has a plurality of memory storage spaces. The channels are coupled to the memory storage spaces, respectively, wherein each of the channels is configured to act as a memory interface for accessing a corresponding memory storage space independently. The control circuit controls clock frequencies of clocks on the channels, respectively. At a same time point, the channels include at least a first channel operating at a first clock frequency set by the control circuit and a second channel operating at a second clock frequency set by the control circuit at a same time point, and the second clock frequency is different from the first clock frequency.