摘要:
The present invention provides a non-cyanide based Au—Sn alloy plating solution capable of performing a Au—Sn alloy plating treatment by a plating solution composition that is neutral and does not contain cyanide. In the present invention, a non-cyanide soluble gold salt, a Sn compound composed of tetravalent Sn, and a thiocarboxylic acid-based compound are contained. The non-cyanide based Au—Sn alloy plating solution of the present invention can further contain sugar alcohols, and, in addition, can further contain a dithioalkyl compound.
摘要:
The disk array device supplies appropriate power to various parts in accordance with the operating mode in cases where the output of the main power supply drops. The disk array device adjusts the power from a commercial power source 6 with an AC/DC power supply 5, and supplies this power to a power supply common bus 7. A disk drive group 1 and a control circuit board group 2 constituting electrical loads are respectively connected to the power supply common bus 7. When the supply of power from the main power supply stops, the capacitor box 3 supplies a relatively large current for a short time only, in order to retain data during an instantaneous power outage. Then, the battery boxes 4 supply power to the power supply common bus 7 for a relatively long period of time, in order to perform destage control and memory backup. The battery boxes 4 perform balancing control of the output current in order to suppress variation in the output current value among the battery boxes 4.
摘要:
A step down type DC-DC power-supply device implements both the stabilization of the control loop and the responsibility at the same time. In the power-supply device, an output power signal is fed back to an error amplifier after having passed through a CR smoothing filter provided independently of a power LC smoothing filter. Also, independently of the duty controls over Power MOSFETs, i.e., upper-side/lower-side semiconductor switching components in the steady state, an output from the power LC smoothing filter is added to an upper and lower limit-mode-equipped control circuit, thereby, at the transient state, forcefully setting the duty α at either 0% or 100%.
摘要:
The invention relates to a power supply system having plural converters connected in parallel. The current of each of the plural converters is detected and each of the converters is controlled so as to match each of the converters to a maximum current value from among the detected current values. In the parallel converters, when one or more converter fails, having an output current of zero, the remaining converters are each partially charged equally to maintain the load current. Since a common bus is arranged between plural converters and plural loads, it is possible to carry out a redundant operation having a high reliability. Since a stable output can be obtained without being affected by the failed converter, a power supply system having the redundancy and the high reliability can be attained.
摘要:
The present invention provides a non-cyanide based Au—Sn alloy plating solution capable of performing a Au—Sn alloy plating treatment by a plating solution composition that is neutral and does not contain cyanide. In the present invention, a non-cyanide soluble gold salt, a Sn compound composed of tetravalent Sn, and a thiocarboxylic acid-based compound are contained. The non-cyanide based Au—Sn alloy plating solution of the present invention can further contain sugar alcohols, and, in addition, can further contain a dithioalkyl compound.
摘要:
A distribution method is performed in a distribution system including a distribution source device for distributing data and a plurality of distribution destination devices. The distribution method includes searching, by the distribution source device, for the distribution destination devices by expanding a search range by plural stages; executing in each stage, by the distribution source device, an allowance process of allowing distribution of the data to the distribution destination devices found by searching in each stage; detecting in a predetermined range, by the distribution destination device, another distribution destination device that has acquired the data before the distribution destination device performing the detecting; and executing, by the distribution destination device, an acquiring process of acquiring the data from the other distribution destination device, according to allowance of distribution.
摘要:
Provided is a highly reliable disk array device. Specifically, this disk array device has a number of hard disk drives for respectively storing data, and which converts a first direct voltage supplied to each of the hard disk drives via a common power supply bus into a second direct voltage required by the hard disk drives at each of the hard disk drives, wherein each of the hard disk drives includes a voltage converter for converting the first direct voltage into the second direct voltage; a control unit for controlling the voltage converter so as to suppress the fluctuation of the second direct voltage based on the second direct voltage output from the voltage converter; and a response characteristics switching unit for switching the response characteristics of the control unit against the fluctuation of the second direct voltage so as to improve the response characteristics of the control unit against the fluctuation of the second direct voltage when a transitional voltage fluctuation of the second direct voltage occurs.
摘要:
A photocurable resin composition comprising a (meth)acrylate ester with a sulfur content of no more than 5 ppm is disclosed. This photocurable resin composition is preferably used in a coating material or an adhesive, or in an adhesive layer or a protective layer formed on top of the metal layer of an optical disk.
摘要:
HDD boxes 831 to 83n are each incorporated with a secondary battery box 87, a non-isolated DC/DC converter 89, and an HDD 91. Logical circuit boards 851 to 85n are each incorporated with the secondary battery box 87, fast-transient-response-type non-isolated DC/DC converters 931 to 933, and a plurality of loads 951 to 953. Every secondary battery box 87 is provided with a charge/discharge circuit 97, and a plurality of in-line secondary batteries 99. In the HDD box, the output voltage from the secondary battery box 87 goes to an HDD 91 via the DC/DC converter 89. In the logical circuit board, the output voltage from the secondary battery box 87 goes to the corresponding loads 951 to 953 via the DC/DC converters 931 to 933. With such a structure, in a disk array apparatus, realized are higher energy efficiency and less space occupation through reducing power loss and optimizing power capacity setting for a backup power.
摘要:
A step-down type DC-DC power-supply device implements both the stabilization of the control loop and the responsibility at the same time. In the power-supply device, an output power signal is fed back to an error amplifier after having passed through a CR smoothing filter provided independently of a power LC smoothing filter. Also, independently of the duty controls over Power MOSFETs, i.e., upper-side/lower-side semiconductor switching components in the steady state, an output from the power LC smoothing filter is added to an upper and lower limit-mode-equipped control circuit, thereby, at the transient state, forcefully setting the duty α at either 0% or 100%.