Fujitsu Corporation

Koichi Onodera

Naofumi Kosugi

Hiroshi Shimamori

Shuji Yamamura

Hironobu Kageyama

Toru Hikichi

A burning stop apparatus includes: a detector that detects a gas component generated by burning occurring in an electronic device immersed in a coolant stored in a liquid immersion tank; a first pipe that introduces the gas component in the liquid immersion tank to the detector; a second pipe that returns the gas component introduced to the detector into the liquid immersion tank; and a breaker that cuts off supply of power to the electronic device when a detection value of the detector is higher than a preset first threshold value for concentration of the gas component.

Burning stop apparatus and immersion cooling system

A power supply unit includes a conversion circuit that performs power conversion of power input into the power supply unit to supply direct-current power to an output path of the power supply unit, a control circuit that controls the conversion circuit so that output voltage supplied from the conversion circuit to the output path has a fixed value if output current supplied from the conversion circuit to the output path is lower than or equal to an overcurrent trip point and controls the conversion circuit so that the output voltage is decreased if the output current exceeds the overcurrent trip point, a monitoring circuit that monitors a discharge output from a discharge circuit to the output path, and a trip point changing circuit that increases the overcurrent trip point if the discharge output monitored by the monitoring circuit is decreased to a threshold value.

Power supply unit

A cooling apparatus includes an assembly including an electronic device and a potting material that covers a side portion and an upper portion of the electronic device, the assembly having a conical upper portion, and a cooling plate including a conical hole, into which the upper portion of the assembly is fitted, and a flow path, through which a coolant flows.

Cooling apparatus and information processing apparatus

A switching power supply includes: a resonant circuit; a switching circuit including a switching element and configured to supply a voltage to the resonant circuit; a smoothing circuit configured to smooth a voltage output from the resonant circuit and outputs an output voltage; a resonance controller configured to, when a control instruction signal is input, cause the switching element to be turned on and off at a first frequency in such a manner that the output voltage becomes a specific voltage; and a controller configured to discontinuously output the control instruction signal to the resonance controller at a second frequency after an operation instruction signal is input until the output voltage becomes higher than a threshold voltage, and continuously output the control instruction signal to the resonance controller after the output voltage becomes higher than the threshold voltage until the operation instruction signal is not input.

Switching power supply, method for controlling switching power supply, and power supply system

A computational processing device includes: a computational-processor that outputs access requests to a storage device; a plurality of request-holding-units that respectively hold access requests output by the computational processor according to individual access types, the access types being types of access requests; an arbitration-unit that arbitrates access requests held in the plurality of request holding units; a buffer-unit that includes a plurality of entries that hold data; and a buffer-controller that causes one of the plurality of entries to hold data output by the storage device in response to an access request arbitrated by the arbitration unit, on the basis of a result of comparing, for each access type, a count value that counts, for each access type, the number of entries holding data from among the plurality of entries against a maximum value for the number of entries made to hold data for each access type.

Computational processing device including request holding units each provided for each type of commands, information processing device including request holding units each provided for each type of commands, and method of controlling information processing device

Growing community of inventors

Kawasaki, Japan

Koichi Onodera