Abstract: A planar matrix transformer assembly. In one embodiment, the assembly comprises (a) a core comprising multiple center posts in a matrix pattern; and multiple edge posts along edges of the core for a magnetic flux return path; (b) a single-turn layer comprising a top winding on the top the layer to form a single turn around each center post; and a bottom winding electrically coupled to the top winding and on the bottom of the layer to form a single turn around each center post; and (c) a multi-turn layer comprising multiple top-side windings on top of the layer, wherein each top-side winding is a multi-turn winding around a different center post; and multiple bottom-side windings on the bottom of the multi-turn layer, wherein each bottom-side winding is (i) electrically coupled to a different top-side winding in a one-to-one correspondence, and (ii) a multi-turn winding around a different center post.

Abstract: A method and apparatus for maximum power point tracking (MPPT). In one embodiment, the method comprises (i) modulating an operating voltage of a first DC source by a first perturbation function to generate a first output power; (ii) modulating an operating voltage of a second DC source by a second perturbation function to generate a second output power, wherein the first and the second perturbation functions are synchronized with one another and out of phase with one another; (iii) comparing the first and the second output powers; and (iv) adjusting MPPT set points for both the first and the second DC sources in the same direction based on a result of comparing the first and the second output powers.

Abstract: The present invention is directed towards an aqueous lubricant composition comprising hyaluronic acid, organic acid, salts and water, and has a pH of between 5.5 and 7.0 and an osmolality between about 150 and 1,500 mOsm/kg. The lubricant surprisingly has long-lasting lubricity and low osmolality as compared to conventional lubricants on the market.

Abstract: A method and apparatus for power converter current control. In one embodiment, the method comprises controlling an instantaneous current generated by a power converter that is part of an AC battery such that (i) the power converter appears, from the perspective of an AC line coupled to the power converter, as a virtual AC voltage source in series with a virtual impedance, wherein real and reactive phasor currents for the power converter are indirectly controlled by modifying amplitude and phase of a virtual AC voltage waveform that defines the virtual AC voltage source, and (ii) active power flow is prioritized while the AC battery is operating in a charge mode.

Abstract: A method and apparatus for autonomously operating a microgrid power generator. In one embodiment, the method comprises obtaining a first measurement of at least one grid parameter of a microgrid transmission line coupled to a power generator in a microgrid; comparing the first measurement to a turn-on threshold; initiating, when the first measurement is less than the turn-on threshold, power generation by the power generator; obtaining, after initiation of the energy generation, a second measurement of the at least one grid parameter of the microgrid transmission line; comparing the second measurement to a shut-down threshold that is greater than the turn-on threshold; and stopping, when the second measurement exceeds the shut-down threshold, the power generation by the power generator.

Abstract: System and apparatus for electrically coupling a microgrid to and from a power distribution grid. In one embodiment, the apparatus comprises an interconnect device, coupled to the microgrid and the power distribution grid, comprising (i) an overcurrent protection component (OPC) for interrupting a circuit during an overcurrent condition; and (2) a contactor component, coupled in series with the OPC and independently operable from the OPC, comprising (a) a set of contacts movable between a first position and a second position; (b) a first coil energizable to move the set of contacts from the first position into the second position; and (c) a second coil energizable, independently of the first coil, to maintain the contacts in the second position after the first coil is de-energized until a level of current flowing through the set of contacts is less than a lower current level.

Abstract: A system for depositing an imprint onto a substrate includes a deposition surface having at least one outlet disposed therein, a substrate holder for holding the substrate against the deposition surface, means operatively associated with the deposition surface for supplying a material through said at least outlet to deposit said material onto the substrate, and a spacer member disposed in contact between the deposition surface and the substrate.

Abstract: A method and apparatus for line-cycle storage of a single-phase cycloconverter. The method includes receiving input power from an input port of the singe-phase cycloconverter and monitoring an AC output port of the single-phase cycloconverter. The method measures energy stored in a line-cycle energy storage circuit coupled to one line of the AC output port of the single-phase cycloconverter, and determines a phase difference between a monitored AC voltage of the AC output port and the measured voltage of the line-cycle energy storage circuit. The method controls switches in the single-phase cycloconverter to selectively store energy in the line-cycle energy storage circuit based on the phase difference.

Abstract: A condom together with a lubrication composition the lubricating composition containing a minimal amount of free water, and comprising one or more glycols, such that the glycols in the lubricant release heat and warmth when contacted with compositions containing free water.

Abstract: An apparatus and system for arc fault protection during power conversion. In one embodiment, the apparatus comprises a power converter comprising a first and a second pair of DC input terminals, coupled in series, for coupling to a first and a second DC source, respectively; an input bridge; an inductor; a first and a second arc fault protection capacitor, wherein (i) the series combination of the first and the second pair of DC input terminals is coupled across the input bridge, (ii) a first terminal of the inductor is coupled between the first and the second pair of DC input terminals, (iii) a second terminal of the inductor is coupled between switches on one leg of the input bridge, and (iv) the first and the second arc fault protection capacitors are coupled across the first and the second pair of DC input terminals, respectively.

Abstract: Apparatus and system for powering an isolated gate driver. In one embodiment, the apparatus comprises a gate driver power supply unit (PSU), coupled to a transistor and to an isolated gate driver that couples control signals to the transistor, for (i) harnessing energy from commutation action across the transistor, and (ii) using the harnessed energy to power the isolated gate driver.

Abstract: Apparatus and method for controlling reactive power. In one embodiment, the apparatus comprises a bidirectional power converter comprising a switched mode cycloconverter for generating AC power having a desired amount of a reactive power component.

Abstract: A condom together with a lubrication composition, the lubricating composition containing a minimal amount of free water, and comprising one or more glycols, such that the glycols in the lubricant release heat and warmth when contact with compositions containing free water.

Abstract: An apparatus, method and system for operating a power converter of a plurality of serially connected power converters coupled using chaotic democratic control includes: a DC voltage module generating a set current value for the power converter to bias a DC source at a set point voltage and a switching controller. The switching controller determining an upper threshold and lower threshold based on the set current value, and comparing a system current value to the upper and lower thresholds to determine an operating state of the power converter, where the system current is generated by the plurality of converters.

Abstract: A composition for depositing an imprint onto an elastomeric substrate, includes an aqueous film-forming polymeric emulsion suspended in an aqueous medium. The present invention is further directed to methods of depositing the same as an imprint onto the elastomeric substrate, and articles formed therefrom.

Abstract: A composition for depositing textured imprints onto an elastomeric substrate includes an aqueous film-forming polymeric emulsion suspended in an aqueous medium. In particular, the composition is formulated for deposition onto a substrate to impart visual or tactile texture to the substrate upon deposition. The present invention is further directed to methods for depositing the same as textured imprints onto the elastomeric substrate, and articles formed therefrom.

Abstract: A system for depositing an imprint onto a substrate includes a deposition surface having at least one outlet disposed therein, a substrate holder for holding the substrate against the deposition surface, means operatively associated with the deposition surface for supplying a material through said at least outlet to deposit said material onto the substrate, and a spacer member disposed in contact between the deposition surface and the substrate.

Abstract: The present invention is directed towards an aqueous lubricant composition comprising hyaluronic acid, organic acid, salts and water, and has a pH of between 5.5 and 7.0 and an osmolality between about 150 and 1,500 mOsm/kg. The lubricant surprisingly has long-lasting lubricity and low osmolality as compared to conventional lubricants on the market.

Abstract: A non-irritating personal lubricant composition comprises a silicone fluid carrier and at least one sensorial agent, the composition having a viscosity of at least 175 centistokes.

Abstract: The present invention provides a personal lubricant composition that includes (a) at least one silicone-containing component, and (b) a hydrophilic component comprising water and a polyol in respective amounts, which provide advantages such as to tactile and sensory, feel.