Abstract: Disclosed techniques include time-varying power management within datacenters. A set of power policies for managing power within a datacenter is obtained. The set of policies varies over time. A priority is determined for a policy within the set of policies for managing the power within the datacenter. The policy within the set varies over time. A situation within the datacenter is identified where the situation matches that described in the policy within the set of policies. A power arrangement within the datacenter is modified based on the policy within the set of policies. The power arrangement within the datacenter applies to a section of the datacenter including one or more IT racks. The modifying includes powering a set of loads within the datacenter by a specific power source, changing a topology within the datacenter, powering down a portion of the datacenter, or changing a service level agreement support level.

Abstract: An electrode block includes: an electrode group having a stacked structure with a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode; lid members disposed on two ends of the electrode group in the stacked direction; and a first holding member attached to outer surfaces of the electrode group and lid members. The first holding member is electrically connected to a first electrode which is one of the positive electrode and the negative electrode, and is not electrically connected to a second electrode which is the other one of the positive electrode and the negative electrode. Further, holes in the electrode group and lid members form a through hole, and a second holding member is attached to the through hole. Thus, the electrode block is fabricated. Then the plurality of electrode blocks is housed in an outer jacket in a stacked manner, and a current collector is inserted into the through hole. Thus, a layered cell is fabricated.

Abstract: Carbon or cobalt, which is used as a conductive agent in an electrode of an alkaline secondary cell, is oxidized by oxygen generated from a positive electrode. The conductive agent degraded by oxidization loses its conductivity through repetitive charge and discharge, resulting in shortening of the cycle life of the cell. In an alkaline secondary cell filled with hydrogen, hydrogen generated from a positive electrode is bound to the hydrogen. This prevents a conductive agent in an electrode from being degraded by oxidization. A cell with excellent cycle life characteristic is thus provided.

Abstract: A layer cell includes an outer casing, a positive electrode, a negative electrode, a separator disposed between the positive electrode and the negative electrode, and an electrically conductive current collector passing through the positive electrode, the negative electrode and the separator in an axial direction of the outer casing. The positive electrode, the negative electrode and the separator are stacked in the axial direction of the outer casing. A first electrode which is one of the positive electrode and the negative electrode is in contact with an inner surface of the outer casing, but is not in contact with the current collector. A second electrode which is the other electrode is not in contact with the outer casing, but is in contact with the current collector. An outer edge of the second electrode is covered with the separator. A peripheral edge of a hole, through which the current collector passes, in the first electrode is covered with the separator.

Abstract: A circuit assembly for a power converter includes power stage blocks. A power stage block includes a power stage IC die, an output inductor that is connected to a switch node of the power stage IC die, and capacitors that form an output capacitor of the power stage block. The output capacitors of the power stage blocks are symmetrically arranged. The output inductors can be placed on the same side of the substrate as the power stage IC dies, or on a side of the substrate that is opposite to the side where the power stage IC dies are disposed. A power stage block may generate two output phases of the power converter.

Abstract: A hybrid solar power generation system includes at least one solar panel, at least one first switch, a rectifying control unit, at least one rechargeable battery, a DC (Direct Current) to AC (Alternating Current) inverter, at least one second switch, and a DC to DC charging unit and a system control unit; wherein the system control unit controls the first switch and the second switch to form a grid-tied path and a standalone path, the solar panel supplies power to a utility grid by the grid-tied path, and the solar panel supplies power to an AC load by the standalone path.

Abstract: A testing system including an adapter and a testing circuit is provided. The adapter includes a converter having a first side and a second side, an inputting terminal and an outputting terminal. The testing circuit includes a testing switch having a first terminal and a second terminal, a detecting circuit and a first indicator. The first side is coupled to the inputting terminal. The second side is coupled to the outputting terminal. The converter is used to convert inputting power for providing outputting power to a load system. The first terminal is coupled to the outputting terminal. The detecting circuit is coupled to the second terminal. When the first terminal is couple with the outputting terminal and contacted with the second terminal, the detecting circuit is used to detect an outputting signal of converter for generating a detecting result. The first indicator sends a message according to the detecting result.

Abstract: The invention provides an uninterruptible power supply, which comprises a battery management circuit and a control circuit. The battery management circuit is electrically coupled to each battery of at least one battery string for measuring the voltage of each battery. When the battery strings discharge, the control circuit obtains the voltage of each battery through the battery management circuit to calculate the discharge current of each battery, and determines whether there is any measured voltage having dropped to an EOD voltage corresponding to a discharge current of a corresponding battery. When the determination result is positive, the control circuit controls the uninterruptible power system to stop the discharging of at least one battery string in which there is at least one measured voltage having dropped to an EOD voltage corresponding to a discharge current of a corresponding battery. Furthermore, a corresponding battery management apparatus is also provided.

Abstract: A method of fabricating an electronic device includes providing a III-V substrate having a hexagonal crystal structure and a normal to a growth surface characterized by a misorientation from the <0001> direction of between 0.15° and 0.65°. The method also includes growing a first III-V epitaxial layer coupled to the III-V substrate and growing a second III-V epitaxial layer coupled to the first III-V epitaxial layer. The method further includes forming a first contact in electrical contact with the III-V substrate and forming a second contact in electrical contact with the second III-V epitaxial layer.

Abstract: A DC-DC converter with transient control. The DC-DC converter includes a power switching circuit, a current to voltage converter, a PI circuit 403, a voltage to current converter 404 and a logic and control circuit 405. The DC-DC converter obtains the transient information of a current flowing through the power switching circuit, to slow down the variation of the output voltage, so as to eliminate the overshot issue.

Abstract: A charging circuit adopts a plurality of feedback control circuits, a constant time signal generator and a logic circuit to control the operation of a power switch. The charge circuit needs no oscillator with high frequency, error amplifier with high speed and high accuracy, or compensation circuit with complicated structure, so the system portability is highly improved.

Abstract: A LED driving system for a LED matrix having a plurality of LEDs connected in parallel. The LED driving system includes a plurality of driving modules. Each one of the plurality of driving modules drives a corresponding one of the plurality of LEDs. Each one of the plurality of driving modules can include a local current driver receiving a reference current and providing a driving current to the corresponding one LED, and a local current tuning module receiving a U-bit current tuning command to tune the driving current for the corresponding one LED to reach a desired driving current using the U-bit current tuning command which provides a predetermined number of tuning steps ranging from 0 to 2U.

Abstract: A power distribution unit comprising at least two conductors, a plurality of outlets, a plurality of indicator lights, an AC-DC conversion circuit, and a control circuit is provided. Each outlet is electrically coupled to two of the conductors. Each indicator light corresponds to one of the outlets. The input of the AC-DC conversion circuit is electrically coupled to two of the conductors. The control circuit is electrically coupled to the indicator lights and the output of the AC-DC conversion circuit. The control circuit is configured for sequentially driving the indicator lights, and is configured for controlling, according to the group information of each grouped outlet, a corresponding indicator light to display a corresponding color of a group to which the grouped outlet belongs.

Abstract: A method of regrowing material includes providing a III-nitride structure including a masking layer and patterning the masking layer to form an etch mask. The method also includes removing, using an in-situ etch, a portion of the III-nitride structure to expose a regrowth region and regrowing a III-nitride material in the regrowth region.

Abstract: A robotic gripper for grasping a target object includes a linear actuator and a gripping assembly. The gripping assembly is coupled to the linear actuator and includes a plurality of fingers that are positioned to selectively grasp and release the target object. The linear actuator includes an air cylinder and a linearly movable rod that reciprocates within the air cylinder between a retracted position and an extended position. The gripping assembly includes a finger holder and a finger closer. The fingers are affixed to the finger holder and extend from the finger holder through openings formed in the finger closer. The finger closer is coupled to the linearly movable rod which reciprocatingly drives the finger closer over the fingers to adjust the fingers between a first position in which the fingers grasp the target object and a second position in which the fingers release the target object.

Abstract: A reconfigurable energy storage system comprising energy modules comprising interconnected circuits, each circuit having at least two terminals, which can function as input or output terminals; an energy storage unit with a positive and a negative terminal, either of which can be interposed between the terminals; a switch connected to the storage unit, and where the switch module provides parallel, series, and/or bypass connectivity for and enables the ability to reverse polarity in the storage unit, and enables the ability to simultaneously charge and discharge storage units within the system; and a control unit that monitors an operational state of the energy storage unit in the energy modules and controls the switches, to bypass, connect the storage unit in parallel, series, and/or change the polarity of the storage unit, wherein the control unit determines a number of storage units available for use from the storage units in the circuits.

Abstract: A PDA (power distribution apparatus) having capability for color management has at least one PDU (power distribution unit). The PDU has a plurality of outlets and a display; wherein the screen color of the display can display different colors according to the management item, thereby enhancing visualization of the management of the PDA.

Abstract: A system includes at least one variable speed generator system configured to provide power to a load bus and at least one fixed speed generator configured to provide power to the load bus. The system also includes a solid state generator (SSG) system including at least one energy storage device and a converter coupled to the at least one energy storage device and configured to transfer power between the at least one energy storage device and the load bus. The system further includes a control system configured to control the at least one variable speed generator system, the at least one fixed speed generator and the SSG system responsive to changes in a load on the load bus.

Abstract: A boost converter having an inductor having a first terminal coupled to an input port to receive the input voltage; a high side switch coupled between the inductor and an output port; a low side switch coupled between the inductor and a ground reference; and a control circuit configured to receive a feedback signal indicative of the output voltage and a reference signal, and to provide a high side control signal and a low side control signal based on the feedback signal and the reference signal; wherein the low side switch on time period is controlled to be constant by the low side control signal when the input voltage and the output voltage are fixed.