摘要:
A circuit receives variable voltage and current from a renewable power source and optimally loads the source to maximize power delivered into a DC bus having constant voltage. A boost circuit and synchronous rectifier having a controlled duty cycle step up the voltage from the renewable source. A feedback control circuit senses delivered current and optimizes the duty cycle to maximize this current, and therefore maximize delivered power. Precision measurement of delivered current is not necessary, greatly reducing complexity and expense. The power source can be isolated from the DC bus, and an arc fault sensor can determine the presence of an electrical arc and shut down the power conditioner to prevent damage due to arcing or fire.
摘要:
A method of adjusting fields of a datagram in the handling of the datagram in a network device may comprising receiving a datagram, with the datagram having at least module identifier fields and port identifier fields, at a port of a network device, adding or subtracting an offset value to at least one of the module identifier fields and at least one of the port identifier fields of the datagram based on data registers in the network device, and forwarding the datagram to a legacy device based on the module and port identifier fields of the datagram. A size of each of the module identifier fields and the port identifier fields handled by the legacy device may be smaller than a size of the module identifier fields and port identifier fields handled by the network device.
摘要:
A method of forwarding data in a network switch fabric is disclosed. An incoming data packet is received at a first port of the fabric and a first packet portion, less than a full packet length, is read to determine particular packet information, the particular packet information including a source address and a destination address. An egress port bitmap is determined based on a lookup in a forwarding table and it is determined if the destination address belongs to a trunk group of trunked ports. The incoming data packet is forwarded based on the egress port bitmap, when the destination address does not belong to the trunk group. When the destination address does belong to the trunk group, a particular trunked port of the trunk group is determined and the incoming data packet is forwarded thereto. More specifically, the particular trunked port of the trunk group may be determined by calculating a hash value based on the source address and the destination value and selecting the particular trunked port based on the hash value. Additionally, a class of service for the incoming data packet is also determined from the particular packet information and a priority for forwarding is set based on the class of service.
摘要:
A system, method, and apparatus for wirelessly charging a load. A primary transformer coil from an energy source is provided to interface with a load application with a secondary transformer coil. The method of charging is independent of resonance frequency.
摘要:
A method and apparatus for modifying standard AC plugs and receptacles to flexibly furnish AC or DC power is disclosed. This can be accomplished by adding a “selector” pin between the non-ground pins used in traditional AC plugs. Alternately, an interposer can be manually applied to the plug to effect selection. Plug electronics can select AC or DC based on respective availability. A flexible power receptacle can manage AC/DC selection, regulate the supplied DC voltage and enable reversion to the AC supply if the DC supply is inadequate. Electronics within a flexible power receptacle can convert DC to AC when advantageous and can regulate the supplied voltage. Additional electronics within a flexible power plug or receptacle can enable communication.
摘要:
A method of forwarding data in a network switch fabric is disclosed. An incoming data packet is received at a first port of the fabric and a first packet portion, less than a full packet length, is read to determine particular packet information, the particular packet information including a source address and a destination address. An egress port bitmap is determined based on a lookup in a forwarding table and it is determined if the destination address belongs to a trunk group of trunked ports. The incoming data packet is forwarded based on the egress port bitmap, when the destination address does not belong to the trunk group. When the destination address does belong to the trunk group, a particular trunked port of the trunk group is determined and the incoming data packet is forwarded thereto. More specifically, the particular trunked port of the trunk group may be determined by calculating a hash value based on the source address and the destination value and selecting the particular trunked port based on the hash value. Additionally, a class of service for the incoming data packet is also determined from the particular packet information and a priority for forwarding is set based on the class of service.
摘要:
A method, apparatus and system for a secure memory with restricted access by processors. System has a plurality of processor units (PUs) coupled to a block of memory with at least one section secured (BMSS) against hacking by not allowing all PUs to access BMSS. One or more PUs has access to BMSS and is implemented with a dedicated function(s) that no other PU can perform such as a security function for encryption key checks. A thread running on a given PU that lacks access to a given memory location in BMSS is transferred to another PU with i) access to given memory location in BMSS; ii) implemented dedicated function; and/or iii) locked down instruction memory not free to run other code. Any attempt to breach protocol issues a fault. Existing code is hardened against less secure user code by only permitting authorized routines to transfer to the implemented PU.
摘要:
In an embodiment, a processing resource allocation method is disclosed. The method may include identifying an instruction mapped to data having a preselected data location. The method may also include determining whether to transfer a call of the instruction from a first processing unit (PU) to a second PU based on the preselected data location.
摘要:
A support structure (SS) and method for mounting SS and solar equipment on pitched roofs. Preassembled SS is installable/ removable, as a single module for reduced cost, installation time, and hazards. Optional housing for battery, electronics, and wireless equipment, is disposed in portion of preassembled SS that resides in protected interior of building. An elevated attach point on the SS optionally accepts cellular and high-frequency transceivers (for mesh network). SS penetrates roof, not on leak-prone roof face, but at roof apex using a main support coupleable to internal building structure. An interface member on the main support has a shape that is conformal to the roof apex to provide a weatherproof seal, load support, and a fulcrum to absorb equipment torque. Padded-standoffs support equipment weight on roof. Optionally, SS frame tubing acts as wire-conduit or SS frame is configured as power conductor for low-voltage, parallely-coupled, independently-troubleshootable, solar panels.
摘要:
A system, method, and apparatus is disclosed for interfacing and transferring power unidirectionally or bidirectionally between a direct current (DC) line and a single or multiphase alternating-current (AC) line for only half of any given phase and only a single phase at a time when polarity is matched between the DC and the AC system. A circuit with simplified, robust, and reduced-cost components perform the power conditioning and the synchronization as a system that simulates a half-wave rectifier/inverter.