JP2003009424A - Power supply system - Google Patents
Power supply systemInfo
- Publication number
- JP2003009424A JP2003009424A JP2001183526A JP2001183526A JP2003009424A JP 2003009424 A JP2003009424 A JP 2003009424A JP 2001183526 A JP2001183526 A JP 2001183526A JP 2001183526 A JP2001183526 A JP 2001183526A JP 2003009424 A JP2003009424 A JP 2003009424A
- Authority
- JP
- Japan
- Prior art keywords
- power
- power supply
- rectifier
- inverter
- unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Inverter Devices (AREA)
- Stand-By Power Supply Arrangements (AREA)
- Rectifiers (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、交流電源、整流
器、蓄電池、インバータ、負荷を有する停電対策機構付
きの電力供給システムに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply system having an AC power source, a rectifier, a storage battery, an inverter, and a power failure countermeasure mechanism having a load.
【０００２】[0002]
【従来の技術】インターネットの普及等により、電力供
給停止を許容しない装置やシステムが増加している。2. Description of the Related Art Due to the spread of the Internet and the like, the number of devices and systems that do not allow the suspension of power supply is increasing.
【０００３】図３は、従来の電力供給システムのブロッ
ク図である。FIG. 3 is a block diagram of a conventional power supply system.
【０００４】図３において、１は交流電源、２は負荷装
置、２−３は電力消費部、２−４は整流部、３は整流
器、４は蓄電池、５はインバータ、１０は交流スイッチ
（ＡＣスイッチ）である。In FIG. 3, 1 is an AC power source, 2 is a load device, 2-3 is a power consumption section, 2-3 is a rectification section, 3 is a rectifier, 4 is a storage battery, 5 is an inverter, and 10 is an AC switch (AC). Switch).
【０００５】図３に示すように、従来の停電対策機構付
き電力供給システム（無停電電力供給システム）では、
常時は交流電源１からの交流電力を整流器３で直流電力
に変換して蓄電池４を充電するとともにインバータ５に
供給し、インバータ５は直流電力を交流電力に変換し
て、交流スイッチ１０を介して負荷装置２に交流電力を
供給する。負荷装置２の整流部２−４では交流電力を直
流電力に変換して、ＣＰＵ（中央演算処理装置）、ＬＳ
Ｉ（大規模集積回路）、ＩＣ（集積回路）等の電気部品
である電力消費部２−３に直流電力を供給する。As shown in FIG. 3, in the conventional power supply system with a power failure countermeasure mechanism (uninterruptible power supply system),
Normally, the AC power from the AC power supply 1 is converted into DC power by the rectifier 3 to charge the storage battery 4 and also supplied to the inverter 5. The inverter 5 converts the DC power into AC power, and through the AC switch 10. AC power is supplied to the load device 2. The rectification unit 2-4 of the load device 2 converts AC power into DC power, and the CPU (Central Processing Unit), LS
DC power is supplied to the power consumption unit 2-3, which is an electric component such as I (large-scale integrated circuit) or IC (integrated circuit).
【０００６】また、交流電源１の停電時や電圧の瞬時低
下時には、蓄電池４に蓄えられている直流電力がインバ
ータ５により交流電力に変換され、負荷装置２−３に供
給される。Further, when the AC power source 1 is out of power or when the voltage is momentarily lowered, the DC power stored in the storage battery 4 is converted into AC power by the inverter 5 and supplied to the load device 2-3.
【０００７】さらに、整流器３やインバータ５が故障し
た場合は、交流スイッチ１０が交流電源１側に無瞬断で
切り替わるようになっており、交流電源１の交流電力が
負荷装置２に直接供給される。Further, when the rectifier 3 or the inverter 5 fails, the AC switch 10 is switched to the AC power supply 1 side without interruption, and the AC power of the AC power supply 1 is directly supplied to the load device 2. It
【０００８】このように、従来の電力供給システムで
は、交流電源１の停電時や瞬時電圧低下時、さらに整流
器３やインバータ５の故障時においても、負荷装置２に
安定した交流電力を供給することができるようになって
いる。As described above, in the conventional power supply system, stable AC power is supplied to the load device 2 even when the AC power supply 1 is out of service, the instantaneous voltage drops, or when the rectifier 3 or the inverter 5 fails. You can do it.
【０００９】[0009]
【発明が解決しようとする課題】しかしながら、図３の
従来の電力供給システムでは、インバータ５の出力と交
流電源１の出力とを切り替える交流スイッチ１０が故障
した場合は、交流電源１と負荷装置２を結ぶ回路が交流
スイッチ１０によって切断されてしまうので、負荷装置
２の電力消費部２−３に電力を供給できなくなるという
課題がある。However, in the conventional power supply system of FIG. 3, when the AC switch 10 for switching the output of the inverter 5 and the output of the AC power supply 1 fails, the AC power supply 1 and the load device 2 The AC switch 10 disconnects the circuit that connects the two components, which causes a problem that power cannot be supplied to the power consumption unit 2-3 of the load device 2.
【００１０】また、上述のように、常時は整流器３、イ
ンバータ５、負荷装置２の整流部２−４を介して電力を
負荷装置２の電力消費部２−３に供給しているので、各
装置で電力損失が発生し、システム効率が低いという課
題がある。Further, as described above, the power is constantly supplied to the power consumption unit 2-3 of the load device 2 through the rectifier 3, the inverter 5, and the rectification unit 2-4 of the load device 2, so that There is a problem that power loss occurs in the device and system efficiency is low.
【００１１】本発明の目的は、上記課題に鑑み、システ
ムを構成するいかなる装置の１つが故障した場合でも、
負荷装置の電力消費部に安定した電力を供給でき、シス
テムの効率が高い停電対策機構付き電力供給システムを
提供することにある。In view of the above-mentioned problems, an object of the present invention is to provide a system even if one of the devices constituting the system fails.
An object of the present invention is to provide a power supply system with a power failure countermeasure mechanism capable of supplying stable power to the power consuming portion of the load device and having high system efficiency.
【００１２】[0012]
【課題を解決するための手段】上記課題を解決するため
に、本発明の請求項１の電力供給システムは、交流電源
の出力を２分岐し、一方を第１の整流部、第１のダイオ
ードを介して負荷に接続し、他方を整流器、蓄電池、イ
ンバータ、第２の整流部、第２のダイオードを介して前
記負荷に接続することを特徴とする。In order to solve the above problems, a power supply system according to claim 1 of the present invention branches an output of an AC power supply into two, one of which is a first rectifying section and a first diode. Is connected to the load via the rectifier, the storage battery, the inverter, the second rectifying unit, and the second diode, and the other is connected to the load.
【００１３】また、本発明の請求項２の電力供給システ
ムは、請求項１の電力供給システムにおいて、前記第１
の整流部の出力電流に対する出力電圧特性と、前記第２
の整流部の出力電流に対する出力電圧特性とを異なら
せ、前記第１の整流部の出力電流が前記第２の整流部の
出力電流よりも常に多く流れるようにしたことを特徴と
する。The power supply system according to claim 2 of the present invention is the power supply system according to claim 1, wherein
The output voltage characteristic with respect to the output current of the rectifying unit of
The output voltage characteristic of the rectification unit with respect to the output current is made different so that the output current of the first rectification unit always flows more than the output current of the second rectification unit.
【００１４】このような構成により、システムを構成す
る交流電源、整流器、インバータ等の装置のいずれか１
つが故障しても、安定した電力を電力消費部に無停電で
供給することができる。また、交流電源が正常な場合、
交流電源の交流電力の全部または一部を直接電力消費部
に供給することができるので、整流器およびインバータ
で発生する電力損失を大幅に削減でき、効率の高い停電
対策機構付き電力供給システムを提供できる。With such a configuration, any one of devices such as an AC power source, a rectifier, an inverter, etc., which constitutes the system
Even if one of them fails, it is possible to supply stable power to the power consumption section without interruption. If the AC power supply is normal,
Since all or part of the AC power of the AC power supply can be directly supplied to the power consumption unit, the power loss generated in the rectifier and the inverter can be significantly reduced, and a highly efficient power supply system with a power failure countermeasure mechanism can be provided. .
【００１５】[0015]
【発明の実施の形態】以下、図面を用いて本発明の実施
の形態について詳細に説明する。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings.
【００１６】図１は、本発明の実施の形態の電力供給シ
ステムのブロック図である。FIG. 1 is a block diagram of a power supply system according to an embodiment of the present invention.
【００１７】図１において、１は交流電源、２は負荷装
置、２−１は第１の整流部、２−２は第２の整流部、Ｄ
１は第１のダイオード、Ｄ２は第２のダイオード、２−
３は電力消費部（負荷）、３は整流器、４は蓄電池、５
はインバータである。In FIG. 1, 1 is an AC power source, 2 is a load device, 2-1 is a first rectifying unit, 2-2 is a second rectifying unit, and D.
1 is a first diode, D2 is a second diode, 2-
3 is a power consumption unit (load), 3 is a rectifier, 4 is a storage battery, 5
Is an inverter.
【００１８】図１に示すように、本実施の形態の停電対
策機構付き電力供給システムは、交流電源１、整流器
３、蓄電池４、インバータ５、負荷装置２を有し、負荷
装置２は第１の整流部２−１、第２の整流部２−２、電
力消費部２−３、第１のダイオードＤ１、第２のダイオ
ードＤ２を有する。As shown in FIG. 1, the power supply system with a power failure countermeasure mechanism of the present embodiment has an AC power supply 1, a rectifier 3, a storage battery 4, an inverter 5, and a load device 2, and the load device 2 is a first device. The rectification unit 2-1, the second rectification unit 2-2, the power consumption unit 2-3, the first diode D1, and the second diode D2.
【００１９】電力消費部（すなわち、負荷）２−３はＣ
ＰＵ、ＬＳＩ、ＩＣなどの電気部品等で構成される。The power consuming unit (that is, the load) 2-3 is C
It is composed of electric components such as PU, LSI, and IC.
【００２０】なお、整流器３、蓄電池４、インバータ５
を１つの筐体に収め、ＵＰＳ（Uninterruptible Power
Supply(System)：無停電電源装置）と呼ばれる装置に置
き換えることも可能である。Incidentally, the rectifier 3, the storage battery 4, the inverter 5
The UPS (Uninterruptible Power)
Supply (System): It is also possible to replace with a device called an uninterruptible power supply.
【００２１】交流電源１の正常時は、交流電源１の交流
電力が負荷装置２の第１の整流部２−１に供給され、第
１の整流部２−１が直流電力に変換し、ダイオードＤ１
を介して電力消費部２−３に直流電力を供給するととも
に、交流電源１の交流電力が整流器３に入力され、整流
器３は交流電力を直流電力に変換して蓄電池４を充電す
るとともにインバータ５に直流電力を供給する。インバ
ータ５は直流電力を交流電力に変換して負荷装置２の第
２の整流部２−２に供給し、第２の整流部２−２が再び
直流電力に変換して、ダイオードＤ２を介して電力消費
部２−３に供給する。When the AC power supply 1 is normal, the AC power of the AC power supply 1 is supplied to the first rectification unit 2-1 of the load device 2, and the first rectification unit 2-1 converts the AC power into DC power. D1
The DC power is supplied to the power consumption unit 2-3 via the AC power supply unit 1, the AC power of the AC power supply 1 is input to the rectifier 3, and the rectifier 3 converts the AC power into DC power to charge the storage battery 4 and the inverter 5 Supply DC power to. The inverter 5 converts the DC power into the AC power and supplies the AC power to the second rectifying unit 2-2 of the load device 2, the second rectifying unit 2-2 converts the DC power into the DC power again, and through the diode D2. It is supplied to the power consumption unit 2-3.
【００２２】このように、負荷装置２の電力消費部２−
３は、交流電源１とインバータ５から電力を供給され
る。As described above, the power consumption unit 2- of the load device 2
Electric power 3 is supplied from the AC power supply 1 and the inverter 5.
【００２３】なお、ダイオードＤ１、Ｄ２は第１の整流
部２−１または第２の整流部２−２が故障した場合、逆
流を防ぎ、故障しない方の健全な整流部（２−１、２−
２）や電力消費部２−３に対して悪影響を与えないため
のものである。When the first rectifying section 2-1 or the second rectifying section 2-2 fails, the diodes D1 and D2 prevent backflow and provide a sound rectifying section (2-1, 2) that does not fail. −
2) and the power consumption unit 2-3 are not adversely affected.
【００２４】本実施の形態の電力供給システムでは、第
１、第２の整流部２−１、２−２の１つが故障しても、
電力消費部２−３に電力を供給できることはいうまでも
ない。また、交流電源１の停電時や瞬時電圧低下時、さ
らに整流器３やインバータ５の故障時においても、負荷
装置２に安定した交流電力を供給することができること
はいうまでもない。In the power supply system of the present embodiment, even if one of the first and second rectifying units 2-1 and 2-2 fails,
It goes without saying that power can be supplied to the power consumption unit 2-3. It goes without saying that stable AC power can be supplied to the load device 2 even when the AC power supply 1 is out of service, when the instantaneous voltage drops, or when the rectifier 3 or the inverter 5 fails.
【００２５】図２は、本実施の形態の電力供給システム
における第１の整流部２−１と第２の整流部２−２の出
力電流に対する出力電圧特性を示す図である。FIG. 2 is a diagram showing output voltage characteristics with respect to output currents of the first rectifying section 2-1 and the second rectifying section 2-2 in the power supply system of the present embodiment.
【００２６】ここで、第１の整流部２−１の出力電流に
対する出力電圧特性と、第２の整流部２−２の出力電流
に対する出力電圧特性を異ならせ、図２に示すように両
整流部２−１、２−２の出力電圧特性の交点●を第１の
整流部２−１の出力電流／電力消費部の消費電流が１０
０％、または１００％に近いところに設計し、常に第１
の整流部２−１の出力電流が第２の整流部２−２の出力
電流よりも多く流れるようにする。これにより、交流電
源１から直接負荷装置２へ供給する電流が増え、インバ
ータ５の出力電流が減少することになる。この結果、整
流器３とインバータ５を通過する電流が減少することか
ら、整流器３とインバータ５の電力損失が減少し、交流
電源１から負荷装置２までの電力損失を減少させること
ができる。Here, the output voltage characteristic with respect to the output current of the first rectifying section 2-1 and the output voltage characteristic with respect to the output current of the second rectifying section 2-2 are made different, and both rectifications are performed as shown in FIG. The intersection point ● of the output voltage characteristics of the parts 2-1 and 2-2 indicates that the output current of the first rectifying part 2-1 / the consumption current of the power consumption part is 10
Design near 0% or 100%, always first
The output current of the rectifying unit 2-1 is made to flow more than the output current of the second rectifying unit 2-2. As a result, the current directly supplied from the AC power supply 1 to the load device 2 increases, and the output current of the inverter 5 decreases. As a result, the current passing through the rectifier 3 and the inverter 5 is reduced, so that the power loss of the rectifier 3 and the inverter 5 is reduced, and the power loss from the AC power source 1 to the load device 2 can be reduced.
【００２７】また、交流電源１の停電時は、蓄電池４に
蓄えられた直流電力がインバータ５により交流電力に変
換され、第２の整流部２−２で直流電力に再び変換され
てダイオードＤ２を介して電力消費部２−３に供給され
る。When the AC power source 1 is out of power, the DC power stored in the storage battery 4 is converted into AC power by the inverter 5, and is converted again into DC power by the second rectifying unit 2-2 to drive the diode D2. The power is supplied to the power consumption unit 2-3 via the power consumption unit 2-3.
【００２８】また、整流器３、またはインバータ５が故
障した場合は、交流電源１の交流電力が第１の整流部２
−１に供給され、第１の整流部２−１で直流電力に変換
されてダイオードＤ１を介して電力消費部２−３に供給
される。When the rectifier 3 or the inverter 5 fails, the AC power of the AC power source 1 is changed to the first rectifier unit 2.
-1, is converted into DC power by the first rectification unit 2-1, and is supplied to the power consumption unit 2-3 via the diode D1.
【００２９】以上説明したように、本実施の形態では、
交流電源１の出力を２分岐し、一方を第１の整流部２−
１、第１のダイオードＤ１を介して負荷、すなわち、電
力消費部２−３に接続し、他方を整流器３、蓄電池４、
インバータ５、第２の整流部２−２、第２のダイオード
Ｄ２を介して電力消費部２−３に接続することにより、
システムを構成する装置のいずれか１つが故障したとし
ても、一瞬たりとも停電しないで（図３の従来技術では
交流スイッチ１０が切り替わるとき、一瞬停電する）、
安定した電力を電力消費部２−３に無停電で供給するこ
とができる。また、交流電源１が正常な場合、交流電源
１の交流電力の全部または一部を直接電力消費部２−３
に供給することができるので、整流器３およびインバー
タ５で発生する電力損失を大幅に削減でき、効率の高い
停電対策機構付き電力供給システムを実現できる。As described above, in the present embodiment,
The output of the AC power supply 1 is branched into two, one of which is the first rectifying unit 2-
1, the load is connected via the first diode D1, that is, the power consumption unit 2-3, and the other is connected to the rectifier 3, the storage battery 4,
By connecting to the power consumption unit 2-3 via the inverter 5, the second rectification unit 2-2, and the second diode D2,
Even if any one of the devices that make up the system fails, there is no power outage even for a moment (in the prior art of FIG. 3, when the AC switch 10 switches, a power outage occurs for a moment).
It is possible to supply stable power to the power consumption unit 2-3 without interruption. When the AC power supply 1 is normal, all or part of the AC power of the AC power supply 1 is directly supplied to the power consumption unit 2-3.
The power loss generated in the rectifier 3 and the inverter 5 can be significantly reduced, and a highly efficient power supply system with a power failure countermeasure mechanism can be realized.
【００３０】以上本発明を実施の形態に基づいて具体的
に説明したが、本発明は上記実施の形態に限定されるも
のではなく、その要旨を逸脱しない範囲において種々変
更可能であることは勿論である。例えば、図１の実施の
形態では、第１の整流部２−１、第１のダイオードＤ
１、第２の整流部２−２、第２のダイオードＤ２を負荷
装置２内に設けた例を示したが、これらを負荷装置２の
外部に設け、インバータを介して、個別の負荷装置の電
力消費部に交流を供給するようにしてもよい。Although the present invention has been specifically described based on the embodiments above, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the invention. Is. For example, in the embodiment of FIG. 1, the first rectifying unit 2-1 and the first diode D
Although the example in which the first, second rectifying unit 2-2, and second diode D2 are provided inside the load device 2 has been shown, these are provided outside the load device 2 and are connected to the individual load devices via the inverter. Alternating current may be supplied to the power consumption unit.
【００３１】[0031]
【発明の効果】以上説明したように、本発明によれば、
システムを構成する交流電源、整流器、インバータ等の
装置のいずれか１つが故障しても、安定した電力を電力
消費部に無停電で供給することができる。また、交流電
源が正常な場合、交流電源の交流電力の全部または一部
を直接電力消費部に供給することができるので、整流器
およびインバータで発生する電力損失を大幅に削減で
き、効率の高い停電対策機構付き電力供給システムを実
現できる。As described above, according to the present invention,
Even if any one of the devices such as the AC power supply, the rectifier, and the inverter that constitute the system fails, stable power can be supplied to the power consumption unit without interruption. In addition, when the AC power supply is normal, all or part of the AC power of the AC power supply can be directly supplied to the power consumption unit, so that the power loss generated in the rectifier and the inverter can be significantly reduced, and a highly efficient power outage can be achieved. A power supply system with a countermeasure mechanism can be realized.
【図１】本発明の実施の形態の電力供給システムのブロ
ック図である。FIG. 1 is a block diagram of a power supply system according to an embodiment of the present invention.
【図２】本実施の形態の電力供給システムにおける第１
の整流部２−１と第２の整流部２−２の出力電流に対す
る出力電圧特性を示す図である。FIG. 2 is a first diagram of the power supply system according to the present embodiment.
FIG. 3 is a diagram showing output voltage characteristics with respect to output currents of the rectifying unit 2-1 and the second rectifying unit 2-2.
【図３】従来の電力供給システムのブロック図である。FIG. 3 is a block diagram of a conventional power supply system.
【符号の説明】
１…交流電源、２…負荷装置、２−１…第１の整流部、
２−２…第２の整流部、Ｄ１…第１のダイオード、Ｄ２
…第２のダイオード、２−３…電力消費部、３…整流
器、４…蓄電池、５…インバータ、２−４…整流部、１
０…交流スイッチ。[Explanation of Codes] 1 ... AC power source, 2 ... Load device, 2-1 ... First rectifying unit,
2-2 ... second rectifying unit, D1 ... first diode, D2
... second diode 2-3, power consumption section 3, rectifier, 4 storage battery, 5 inverter, 2-4 rectification section, 1
0 ... AC switch.
フロントページの続き (72)発明者 武田 隆 東京都千代田区大手町二丁目３番１号 日 本電信電話株式会社内 Ｆターム(参考） 5G015 FA16 GB03 HA16 JA06 JA52 5H006 BB06 CA07 CC01 CC04 FA04 5H007 BB05 CC09 FA02 Continued front page (72) Inventor Takashi Takeda 2-3-1, Otemachi, Chiyoda-ku, Tokyo Inside Telegraph and Telephone Corporation F-term (reference) 5G015 FA16 GB03 HA16 JA06 JA52 5H006 BB06 CA07 CC01 CC04 FA04 5H007 BB05 CC09 FA02
Claims (2)
整流部、第１のダイオードを介して負荷に接続し、他方
を整流器、蓄電池、インバータ、第２の整流部、第２の
ダイオードを介して前記負荷に接続することを特徴とす
る電力供給システム。1. An output of an AC power supply is branched into two, one of which is connected to a load through a first rectifier and a first diode, and the other of which is a rectifier, a storage battery, an inverter, a second rectifier, and a second rectifier. An electric power supply system, characterized in that the electric power supply system is connected to the load through the diode.
電圧特性と、前記第２の整流部の出力電流に対する出力
電圧特性とを異ならせ、前記第１の整流部の出力電流が
前記第２の整流部の出力電流よりも常に多く流れるよう
にしたことを特徴とする請求項１記載の電力供給システ
ム。2. An output voltage characteristic with respect to an output current of the first rectifying section and an output voltage characteristic with respect to an output current of the second rectifying section are made different from each other so that the output current of the first rectifying section becomes 2. The power supply system according to claim 1, wherein the output current of the rectifying unit 2 is always larger than the output current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001183526A JP2003009424A (en) | 2001-06-18 | 2001-06-18 | Power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001183526A JP2003009424A (en) | 2001-06-18 | 2001-06-18 | Power supply system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003009424A true JP2003009424A (en) | 2003-01-10 |
Family
ID=19023466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001183526A Pending JP2003009424A (en) | 2001-06-18 | 2001-06-18 | Power supply system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003009424A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7501720B2 (en) | 2003-02-11 | 2009-03-10 | O2Micro International Limited | Selector circuit for power management in multiple battery systems |
| US7791314B2 (en) | 2000-09-21 | 2010-09-07 | O2Micro International Limited | Power management topologies to control power between a DC power source and one or more batteries to a system load |
| WO2012067171A1 (en) * | 2010-11-18 | 2012-05-24 | 株式会社 日立メディコ | Mobile x-ray apparatus |
| US8350534B2 (en) | 2000-09-21 | 2013-01-08 | O2Micro International, Ltd. | Method and electronic circuit for efficient battery wake up charging |
| JP2015226428A (en) * | 2014-05-29 | 2015-12-14 | 日本電信電話株式会社 | Power supply switching circuit |
-
2001
- 2001-06-18 JP JP2001183526A patent/JP2003009424A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7791314B2 (en) | 2000-09-21 | 2010-09-07 | O2Micro International Limited | Power management topologies to control power between a DC power source and one or more batteries to a system load |
| US8350534B2 (en) | 2000-09-21 | 2013-01-08 | O2Micro International, Ltd. | Method and electronic circuit for efficient battery wake up charging |
| US7501720B2 (en) | 2003-02-11 | 2009-03-10 | O2Micro International Limited | Selector circuit for power management in multiple battery systems |
| WO2012067171A1 (en) * | 2010-11-18 | 2012-05-24 | 株式会社 日立メディコ | Mobile x-ray apparatus |
| JPWO2012067171A1 (en) * | 2010-11-18 | 2014-05-12 | 株式会社日立メディコ | Mobile X-ray device |
| US9131592B2 (en) | 2010-11-18 | 2015-09-08 | Hitachi Medical Corporation | Mobile X-ray apparatus |
| JP2015226428A (en) * | 2014-05-29 | 2015-12-14 | 日本電信電話株式会社 | Power supply switching circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4102964B2 (en) | Standby uninterruptible power generation system and method using rectified AC voltage and storage battery | |
| US8782449B2 (en) | Power supply system with a plurality of power supply units capable of powering a plurality of load units depending on the type and operation state of each load unit | |
| US8203234B2 (en) | Power safety system | |
| US6479974B2 (en) | Stacked voltage rails for low-voltage DC distribution | |
| US20030080625A1 (en) | Low cost redundant AC to DC power supply | |
| US8723364B2 (en) | Uninterruptible power supply having integrated charge/discharge circuit | |
| ES2713754T3 (en) | Device and method of power supply, power reception device | |
| JP2000152496A (en) | Method and device for supplying redundant power by connecting power source to segment or ring | |
| US7847435B2 (en) | Intrinsically balanced direct current uninterruptible power supply | |
| JP2005224097A (en) | Redundant input power supply system | |
| US7763993B2 (en) | DC UPS with auto-ranging backup voltage capability | |
| EP3503366B1 (en) | Uninterruptible power supply apparatus | |
| TWI661642B (en) | Uninterruptible power operating apparatus | |
| US20220232726A1 (en) | Power distribution system and server system | |
| CN111262331A (en) | Flight battery with AC switch PFC front end for UPS | |
| JP2003009424A (en) | Power supply system | |
| US6621180B2 (en) | Method and system for maintaining full power during a power interruption in a multiple power supply system | |
| JP2000358370A (en) | Multi-output stabilized dc power supply | |
| CN113629697A (en) | Power supply control system | |
| US11996689B2 (en) | Bridge supply circuit of multipath Efuse chip and server | |
| JP3169916B2 (en) | Battery power supply control system | |
| JPH08154349A (en) | Uninterruptible ac power supply apparatus | |
| JPH04304160A (en) | Dc power supply with battery backup function | |
| JP4404264B2 (en) | Power supply system | |
| US10992220B2 (en) | Power supply circuit for fiber laser oscillator use |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20050603 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20050614 |
|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20051018 |