公开(公告)号：US20030184937A1

公开(公告)日：2003-10-02

申请号：US10423869

申请日：2003-04-28

Applicant: Hitachi, Ltd. ,  Hitachi Maxell, Ltd. ,  Hitachi Computer Peripherals Co., Ltd.

Inventor： Akihiko Kanouda ,  Satoru Masuyama ,  Masato Isogai ,  Ryouhei Saga ,  Kenichi Onda ,  Norikazu Tokunaga

IPC: H02H003/20

CPC classification number: H02J9/061 ,  Y10T307/549 ,  Y10T307/587 ,  Y10T307/615 ,  Y10T307/625

Abstract: The present invention reduces the capacity of the AC-DC converter for the peak load and realizes low price and reduction in the volume of the power unit. The apparatus built-in backup power supply has the peak cut function for sharing a part of the load current at the time of peak load from the secondary battery. The two-way DC-DC converter 5 and the secondary battery 4 are installed on the DC output side of the AC-DC converter 3 and a current larger than a predetermined peak cut level is discharged from the secondary battery 4 at the time of peak load. Further, when the load is less than the predetermined cut level, the secondary battery 4 is charged from the AC-DC converter 3 via the two-way DC-DC converter 5. Furthermore, a most suitable peak cut level according to the SOC of the secondary battery and load pattern is automatically set and dynamically changed.

公开(公告)号：US09104328B2

公开(公告)日：2015-08-11

申请号：US13697830

申请日：2012-10-31

Applicant: Hitachi, Ltd. ,  Hitachi Computer Peripherals Co., Ltd.

Inventor： Mitsuo Hayasaka ,  Koji Yamasaki

IPC: G06F7/53 ,  G06F13/378 ,  G06F13/20 ,  G06F3/06 ,  G06F17/30

CPC classification number: G06F3/0608 ,  G06F3/0619 ,  G06F3/0641 ,  G06F3/065 ,  G06F3/067 ,  G06F17/30156

Abstract: Upon receipt of an I/O request instructing storage of data in a storage device 106 from a host apparatus, a storage apparatus 100 selects a de-duplication process method to be applied to the received data, based on at least any of influence on processing performance of the storage apparatus 100 to be performed by execution of a first de-duplication process method (inline method) in which the de-duplication process is performed on the data immediately after the receipt of the I/O request, influence on the processing performance of the storage apparatus 100 to be performed by execution of a second de-duplication process method (post-process method) in which the de-duplication process is performed on the data at later timing, and the size of a temporary storage device 106b to be required for the processing of the data by the second de-duplication process method.

Abstract translation: 在从主机装置接收到指示存储装置106中的数据存储的I / O请求时，存储装置100基于对处理的影响中的至少任一个选择对应用于所接收的数据的重复数据删除处理方法 通过执行对接收到I / O请求之后的数据进行重复数据删除处理的第一重复数据删除处理方法（内联方法）来执行存储装置100的性能，对处理 通过执行对稍后定时的数据进行重复数据删除处理的第二重复数据删除处理方法（后处理方法）以及临时存储装置106b的大小来执行存储装置100的性能 是通过第二重复数据删除处理方法处理数据所需要的。

公开(公告)号：US20030107906A1

公开(公告)日：2003-06-12

申请号：US10292542

申请日：2002-11-13

Applicant: Hitachi, Ltd. ,  Hitachi Computer Peripherals Co., Ltd. ,  Hitachi Tohbu Semiconductor, Ltd.

Inventor： Norikazu Tokunaga ,  Kenichi Onda ,  Takeshi Onaka ,  Satoru Masuyama ,  Ryouhei Saga ,  Katsunori Hayashi

IPC: H02M005/42

CPC classification number: H02M1/4208 ,  Y02B70/126 ,  Y10T307/615

Abstract: A DC power supply device comprises an AC/DC converter 1, a DC/DC converter 2, and a DC converter 3 converting DC power from a battery 4 to DC voltage for connecting to output terminals of the AC/DC converter. The DC power supply device is provided with a controlling circuit 100 which observes a charging control level and a load sharing level, impresses a charging command on a UPS controlling part controlling the DC converter, and simultaneously provides a PFC controlling part controlling the AC/DC converter with a current command when a voltage level is less than the charging control level, stops only the charging command when the voltage level is more than the charging level and less than the load sharing level, and provides the UPS controlling part and the PFC controlling part with current commands when the voltage level is more than the load sharing level. The AC/DC converter and the DC converter supply power in parallel when a load is more than a prescribed value, and the DC converter supplies power as a backup when a trouble is present in an AC power input.