Fremont, CA, United States
Fremont, CA, United States
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A method for testing a photovoltaic device electrically coupled to an input port of a maximum power point tracking (MPPT) controller, where the MPPT controller includes a switching circuit adapted to transfer power between the input port and an output port of the MPPT controller, includes the steps of: (a) driving a test current into the output port of the MPPT controller; (b) detecting presence of the test current; and (c) in response to detecting presence of the test current, causing the switching circuit to provide a path for the test current from the output port to the photovoltaic device.


Patent
Volterra | Date: 2015-12-18

A coupled inductor array includes a monolithic magnetic core formed of magnetic materials having a distributed gap, first and second windings, and a low-permeability magnetic structure. The first and second windings form respective first and second winding turns around a common winding axis extending in the height direction. The low-permeability magnetic structure is embedded in the monolithic magnetic core and forms a loop around the common winding axis. The low-permeability magnetic structure separates the first and second winding turns in the height direction, and the low-permeability magnetic structure is formed of a magnetic material having a lower magnetic permeability than the one or more magnetic materials forming the monolithic magnetic core. One possible application of the coupled inductor array is in a multi-phase switching power converter.


Patent
Volterra | Date: 2016-12-09

Various applications of interconnect substrates in power management systems are described.


A coupled inductor includes a ladder magnetic core including two opposing rails extending in a lengthwise direction and joined by a plurality of rungs. The coupled inductor further includes a respective winding wound around each of the plurality of rungs. The plurality of rungs are divided into at least two groups of rungs, and a lengthwise separation distance between adjacent rungs in each group of rungs is less than a lengthwise separation distance between adjacent rungs of different groups of rungs.


An electric power system includes N electric power sources and N switching circuits, where N is an integer greater than one. Each switching circuit includes an input port electrically coupled to a respective one of the N electric power sources, an output port, and a first switching device adapted to switch between its conductive and non-conductive states to transfer power from the input port to the output port. The output ports of the N switching circuits are electrically coupled in series and to a load to establish an output circuit. Each of the N switching circuits uses an interconnection inductance of the output circuit as a primary energy storage inductance of the switching circuit.


Patent
Volterra | Date: 2015-09-28

The subject matter of this document can be embodied in a method that includes a voltage regulator having an input terminal and an output terminal. The voltage regulator includes a high-side transistor between the input terminal and an intermediate terminal, and a low-side transistor between the intermediate terminal and ground. The voltage regulator includes a low-side driver circuit including a capacitor and an inverter. The output of the inverter is connected to the gate of the low-side transistor. The voltage regulator also includes a controller that drives the high-side and low-side transistors to alternately couple the intermediate terminal to the input terminal and ground. The controller is configured to drive the low-side transistor by controlling the inverter. The voltage regulator further includes a switch coupled to the low-side driver circuit. The switch is configured to block charge leakage out of the capacitor during an off state of the low-side transistor.


An integrated circuit includes a semiconductor die including one or more switching circuits, a magnetic core having length and width, first and second metallic leads, and integrated circuit packaging material. The first metallic lead forms a first winding turn around a portion of the magnetic core, and the first metallic lead is electrically coupled to the semiconductor die. The second metallic lead forms a second winding turn around a portion of the magnetic core. The first and second winding turns are offset from each other along both of the width and length of the magnetic core. The integrated circuit is, for example, included in an integrated electronic assembly.


Patent
Volterra | Date: 2015-06-29

A semiconductor package can include a semiconductor die having an integrated circuit, a first die surface, and an opposite second die surface. A packaging can be attached to the die and have a holder surface opposite the first die surface. A heat spreader can be configured to cover the second die surface and the packaging surface and can be attached thereto by a layer of adhesive positioned between the heat spreader and the semiconductor die. A semiconductor package array can include an array of semiconductor dies and a heat spreader configured to cover each semiconductor die. A conductive lead can be electrically connected to the integrated circuit in a semiconductor die and can extend from the first die surface. Manufacturing a semiconductor package can include applying thermally conductive adhesive to the heat spreader and placing the heat spreader proximate the semiconductor die.


Various applications of interconnect substrates in power management systems are described.


Grant
Agency: European Commission | Branch: H2020 | Program: IA | Phase: FTIPilot-1-2015 | Award Amount: 1.52M | Year: 2016

Global land resources are under pressure in the face of growing demand from an exponentially growing population and the impacts of climate change. The numbers demonstrate that we are wasting our natural capital at an accelerating pace. The time to act is now, by initiating large scale land restoration programs involving tree plantings. The ecosystem restoration market is globally estimated at US $300 billion. Towards this goal we have developed a unique, fully functional product (TRL 7), called Cocoon, to promote tree establishment in dryland environments. Acting as a tree incubator the Cocoon nourishes tree seedlings, resulting in high survival rates and increased resilience to adverse growing conditions, while maintaining water efficiency. The scope of this FTI is to prototype an innovative manufacturing line in the EU with the following objectives: 1. Reach a production capacity of 1 million Cocoons per year 2. Achieve a production output of 125 units per hour (as compared to 40 units in status quo) 3. Reduce the manufacturing costs per Cocoon from 5 (currently) to 1 (target costs) 4. Reduce energy consumption by 50% & manufacture with 100% recycled energy from waste heat, solar heat and PV 5. Integrate local agriculture waste materials or grasses in the product When production cost can go down to 1, completely new, large-scale markets will open up. Our project will stimulate private sector investment in land regeneration projects and promote trans-disciplinary research & innovation (industrial design, organic waste recycling, biomass, renewable energy). Our sustainable innovations address societal needs of restoring degraded areas, especially in times of increasing pressures from climate change. They also create a viable business opportunity for the private tree planting sector (forestry companies, fruit & nut producers, etc.). FTI Cocoon is highly business-driven and clearly demonstrates a realistic potential for quick deployment and market take-up.

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