JP2007325413A - Current divider - Google Patents

Current divider Download PDF

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Publication number
JP2007325413A
JP2007325413A JP2006152952A JP2006152952A JP2007325413A JP 2007325413 A JP2007325413 A JP 2007325413A JP 2006152952 A JP2006152952 A JP 2006152952A JP 2006152952 A JP2006152952 A JP 2006152952A JP 2007325413 A JP2007325413 A JP 2007325413A
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Prior art keywords
communication device
power supply
current
diode
protection fuse
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Tadatoshi Babasaki
忠利 馬場崎
Jun Sato
佐藤　　淳
Hidenori Matsuo
英徳 松尾
Mikio Yamazaki
幹夫 山崎
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Nippon Telegraph and Telephone Corp
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Nippon Telegraph and Telephone Corp
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Priority to JP2006152952A priority Critical patent/JP2007325413A/en
Publication of JP2007325413A publication Critical patent/JP2007325413A/en
Pending legal-status Critical Current

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  • Power Conversion In General (AREA)
  • Protection Of Static Devices (AREA)
  • Direct Current Feeding And Distribution (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a current divider by which each system is safely intercepted and protected, respectively, even if dispersion of a rated current of connected load equipment is larger, in a DC electric power supply system having the current divider which branches a current from a rectifier to a plurality of communications equipment. <P>SOLUTION: Diodes 11, 12 for preventing reversed flow are arranged in the current divider 2 or at an input stage of the load equipment, by which system down is prevented in the normal load equipment caused by a short circuit accident of other load equipment. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、整流装置から通信装置に電流を分岐する電流分配装置に関する。   The present invention relates to a current distribution device that branches a current from a rectifier to a communication device.

特許第330878号公報Japanese Patent No. 330878

図３は、従来の直流給電システムの回路図である。図３に示す直流給電システムは、整流装置１０１、従来の電流分配装置１０２、通信装置１０３、１０４、各通信装置の前段に接続された入力コンデンサ１０６、１０９、通信装置ユニット１０７、１１０から構成される。従来の電流分配装置１０２の内部回路は、系統保護用ヒューズ１０５、１０８により構成される。
整流装置１０１から給電される直流電力は電流分配装置１０２において分岐され、系統保護用ヒューズ１０５を介して、通信装置１０３の入力コンデンサ１０６を充電しながら通信装置ユニット１０７に給電されるとともに、同様に系統保護用ヒューズ１０８を介して、通信装置１０４の入力コンデンサ１０９を充電しながら通信装置ユニット１１０に給電される。
ここで、例えば、通信装置ユニット１０７に短絡事故が発生した場合、整流装置１０１及び入力コンデンサ１０６から通信装置ユニット１０７に過電流が流れ、系統保護用ヒューズ１０５が溶断し、通信装置１０３を給電系統から速やかに切り離すことにより給電システムを保護している。この保護を速やかに行い、かつ長寿命で用いるため、通常、系統保護用ヒューズ１０５及び系統保護用ヒューズ１０８は、それぞれ通信装置１０３及び通信装置１０４の定格電流の４/3倍程度の定格電流のヒューズが使用される。 FIG. 3 is a circuit diagram of a conventional DC power supply system. The DC power supply system shown in FIG. 3 includes a rectifier 101, a conventional current distribution device 102, communication devices 103 and 104, input capacitors 106 and 109 connected in front of each communication device, and communication device units 107 and 110. The The internal circuit of the conventional current distribution device 102 includes system protection fuses 105 and 108.
The DC power supplied from the rectifier 101 is branched in the current distribution device 102 and supplied to the communication device unit 107 through the system protection fuse 105 while charging the input capacitor 106 of the communication device 103, and similarly. Power is supplied to the communication device unit 110 through the system protection fuse 108 while charging the input capacitor 109 of the communication device 104.
Here, for example, when a short circuit accident occurs in the communication device unit 107, an overcurrent flows from the rectifier 101 and the input capacitor 106 to the communication device unit 107, the system protection fuse 105 is blown, and the communication device 103 is connected to the power supply system. The power supply system is protected by quickly disconnecting from the power supply. In order to perform this protection promptly and with a long life, the system protection fuse 105 and the system protection fuse 108 usually have a rated current of about 4/3 times the rated current of the communication device 103 and the communication device 104, respectively. A fuse is used.

前記したヒューズ定格電流の設定基準に従うと、通信装置１０４の定格電流が通信装置１０３の定格電流に対し著しく小さい場合、系統保護用ヒューズ１０８の定格電流は系統保護用ヒューズ１０５の定格電流に対し著しく小さくなる。また、通信装置１０３及び通信装置１０４の入力コンデンサ容量は、EMI対策や給電系統の安定性のために近年大容量のコンデンサが選定される場合がある。このため、従来の電流分配装置では、通信装置ユニット１０７に短絡事故が発生した場合、整流装置１０１、入力コンデンサ１０６からだけでなく、入力コンデンサ１０９からも通信装置ユニット１０７に過電流が流れ、系統保護用ヒューズ１０５が溶断するとともに、系統保護用ヒューズ１０８も溶断し、健全な通信装置１０４をシステムダウンさせてしまうという問題があった。   If the rated current of the fuse rated current described above is followed, when the rated current of the communication device 104 is significantly smaller than the rated current of the communication device 103, the rated current of the system protection fuse 108 is significantly higher than the rated current of the system protection fuse 105. Get smaller. In addition, as the input capacitor capacity of the communication device 103 and the communication device 104, a large-capacity capacitor may be selected in recent years for EMI countermeasures or stability of the power feeding system. For this reason, in the conventional current distribution device, when a short circuit accident occurs in the communication device unit 107, an overcurrent flows not only from the rectifying device 101 and the input capacitor 106 but also from the input capacitor 109 to the communication device unit 107. The protection fuse 105 is blown, and the system protection fuse 108 is also blown, causing a problem that the sound communication device 104 is brought down.

本発明（１）は、電源装置と前記電源装置から供給される電力を複数の負荷装置に分配する電流分配装置とからなる直流給電システムにおいて、過電流保護用のヒューズに直列に逆流防止用のダイオードを接続したことを特徴とする電流分配装置である。   The present invention (1) is a DC power supply system comprising a power supply device and a current distribution device that distributes power supplied from the power supply device to a plurality of load devices. A current distribution device having a diode connected thereto.

本発明（２）は、前記発明（１）の電流分配装置を有する直流給電システムである。   The present invention (2) is a DC power feeding system having the current distribution device of the invention (1).

本発明（３）は、電源装置と前記電源装置から供給される電力を複数の負荷装置に分配する電流分配装置とからなる直流給電システムから電力を供給され、供給電力を入力する端子と入力コンデンサの間に逆流防止用のダイオードを配置したことを特徴とする負荷装置である。   According to the third aspect of the present invention, there is provided a terminal and an input capacitor that are supplied with power from a DC power supply system including a power supply device and a current distribution device that distributes the power supplied from the power supply device to a plurality of load devices. The load device is characterized in that a backflow preventing diode is arranged between the two.

本発明により、電流分配装置に複数の負荷装置が接続される直流給電システムにおいて、接続された負荷装置の定格電流にばらつきが大きい場合でも、各系統をそれぞれ安全に遮断及び保護することが可能となる。   According to the present invention, in a DC power supply system in which a plurality of load devices are connected to a current distribution device, it is possible to safely shut off and protect each system even when there is a large variation in the rated current of the connected load devices. Become.

本発明の直流給電システムは、電流分配装置内、又は、負荷装置の入力段に逆流防止用のダイオードを配置したことに特徴がある。複数の負荷装置に電流を供給する給電システムにおいて、逆流防止用のダイオードを設けることで、一部負荷装置の短絡事故により正常な負荷装置の入力コンデンサからヒューズに電流が逆流し、該ヒューズが溶断することで正常な負荷装置がシステムダウンする問題を防止することが可能である。   The DC power supply system according to the present invention is characterized in that a diode for preventing backflow is arranged in the current distribution device or in the input stage of the load device. In a power supply system that supplies current to multiple load devices, by providing a diode to prevent backflow, current flows back from the input capacitor of the normal load device to the fuse due to a short circuit accident in some load devices, and the fuse blows. By doing so, it is possible to prevent a problem that a normal load device goes down the system.

（第一の具体例）
図１は、本発明の直流給電システムの第一の具体例である。図１に示す直流給電システムは、負荷装置として、例えば、通信装置に電力を供給する給電システムである。また、電流分配装置２の内部において、逆流防止用のダイオードが系統保護用ヒューズと直列に接続されている点で、図３に示す従来の直流給電システムと異なる。整流装置１から給電される直流電力は電流分配装置２にて分岐され、系統保護用ヒューズ５、ダイオード１１を介して、通信装置３の入力コンデンサ６を充電しながら通信装置ユニット７に給電される。同様に、直流電力は、系統保護用ヒューズ８、ダイオード１２を介して、通信装置４の入力コンデンサ９を充電しながら通信装置ユニット１０に給電される。ここで、通信装置ユニット７に短絡事故が発生した場合、整流装置１及び入力コンデンサ６から通信装置ユニット７に過電流が流れ、系統保護用ヒューズ５が溶断し、通信装置３を給電系統から速やかに切り離す。しかし、入力コンデンサ９からの電流は、ダイオード１２により阻止されるので、系統保護用ヒューズ８は溶断せず、通信装置４のシステムダウンを防ぐことが可能になる。 (First example)
FIG. 1 is a first specific example of a DC power supply system of the present invention. The DC power supply system shown in FIG. 1 is a power supply system that supplies power to, for example, a communication device as a load device. Also, the current distribution device 2 is different from the conventional DC power supply system shown in FIG. 3 in that a backflow prevention diode is connected in series with a system protection fuse. The DC power fed from the rectifier 1 is branched by the current distribution device 2 and fed to the communication device unit 7 through the system protection fuse 5 and the diode 11 while charging the input capacitor 6 of the communication device 3. . Similarly, DC power is supplied to the communication device unit 10 through the system protection fuse 8 and the diode 12 while charging the input capacitor 9 of the communication device 4. Here, when a short circuit accident occurs in the communication device unit 7, an overcurrent flows from the rectifier 1 and the input capacitor 6 to the communication device unit 7, the system protection fuse 5 is blown, and the communication device 3 is quickly disconnected from the power supply system. Disconnect. However, since the current from the input capacitor 9 is blocked by the diode 12, the system protection fuse 8 is not blown and it is possible to prevent the system of the communication device 4 from being down.

（第二の具体例）
図２(a)は、本発明の直流給電システムの第二の具体例である。図２(a)に示す直流給電システムは、電流分配装置２の内部において、逆流防止用のダイオードが系統保護用ヒューズと直列に接続されている。第一の具体例が、系統保護用ヒューズが整流装置側に配置され、ダイオードが通信装置側に配置されていたのに対し、第二の具体例では、系統保護用ヒューズが通信装置側に配置され、ダイオードが整流装置側に配置されている。整流装置１から給電される直流電力は電流分配装置２にて分岐され、ダイオード１１、系統保護用ヒューズ５を介して、通信装置３の入力コンデンサ６を充電しながら通信装置ユニット７に給電される。同様に、直流電力は、ダイオード１２、系統保護用ヒューズ８を介して、通信装置４の入力コンデンサ９を充電しながら通信装置ユニット１０に給電される。ここで、通信装置ユニット７に短絡事故が発生した場合、整流装置１及び入力コンデンサ６から通信装置ユニット７に過電流が流れ、系統保護用ヒューズ５が溶断し、通信装置３を給電系統から速やかに切り離す。しかし、入力コンデンサ９からの電流は、ダイオード１２により阻止されるので、系統保護用ヒューズ８は溶断せず、通信装置４のシステムダウンを防ぐことが可能になる。 (Second specific example)
FIG. 2 (a) is a second specific example of the DC power feeding system of the present invention. In the DC power supply system shown in FIG. 2A, a backflow prevention diode is connected in series with a system protection fuse inside the current distribution device 2. In the first specific example, the system protection fuse is arranged on the rectifying device side and the diode is arranged on the communication device side, whereas in the second specific example, the system protection fuse is arranged on the communication device side. The diode is arranged on the rectifier side. The DC power supplied from the rectifier 1 is branched by the current distributor 2 and supplied to the communication device unit 7 through the diode 11 and the system protection fuse 5 while charging the input capacitor 6 of the communication device 3. . Similarly, the DC power is supplied to the communication device unit 10 through the diode 12 and the system protection fuse 8 while charging the input capacitor 9 of the communication device 4. Here, when a short circuit accident occurs in the communication device unit 7, an overcurrent flows from the rectifier 1 and the input capacitor 6 to the communication device unit 7, the system protection fuse 5 is blown, and the communication device 3 is quickly disconnected from the power supply system. Disconnect. However, since the current from the input capacitor 9 is blocked by the diode 12, the system protection fuse 8 is not blown and it is possible to prevent the system of the communication device 4 from being down.

（第三の具体例）
図２(b)は、本発明の直流給電システムの第三の具体例である。第一、第二の具体例において、逆流防止用ダイオードが電流分配装置内部に配置されていたのに対し、第三の具体例においては、逆流防止用ダイオードが通信装置の内部、入力端子と入力コンデンサの間に配置されている。整流装置１から給電される直流電力は電流分配装置２にて分岐され、系統保護用ヒューズ５、ダイオード１１を介して、通信装置３の入力コンデンサ６を充電しながら通信装置ユニット７に給電される。同様に、直流電力は、系統保護用ヒューズ８、ダイオード１２を介して、通信装置４の入力コンデンサ９を充電しながら通信装置ユニット１０に給電される。ここで、通信装置ユニット７に短絡事故が発生した場合、整流装置１及び入力コンデンサ６から通信装置ユニット７に過電流が流れ、系統保護用ヒューズ５が溶断し、通信装置３を給電系統から速やかに切り離す。しかし、入力コンデンサ９からの電流は、ダイオード１２により阻止されるので、系統保護用ヒューズ８は溶断せず、通信装置４のシステムダウンを防ぐことが可能になる。 (Third example)
FIG. 2B is a third specific example of the DC power supply system of the present invention. In the first and second specific examples, the backflow prevention diode is arranged inside the current distribution device, whereas in the third specific example, the backflow prevention diode is arranged inside the communication device, the input terminal and the input. It is arranged between the capacitors. The DC power fed from the rectifier 1 is branched by the current distribution device 2 and fed to the communication device unit 7 through the system protection fuse 5 and the diode 11 while charging the input capacitor 6 of the communication device 3. . Similarly, DC power is supplied to the communication device unit 10 through the system protection fuse 8 and the diode 12 while charging the input capacitor 9 of the communication device 4. Here, when a short circuit accident occurs in the communication device unit 7, an overcurrent flows from the rectifier 1 and the input capacitor 6 to the communication device unit 7, the system protection fuse 5 is blown, and the communication device 3 is quickly disconnected from the power supply system. Disconnect. However, since the current from the input capacitor 9 is blocked by the diode 12, the system protection fuse 8 is not blown and it is possible to prevent the system of the communication device 4 from being down.

本発明の直流給電システムの第一の具体例の回路図である。It is a circuit diagram of the 1st example of the direct-current power feeding system of the present invention. (a)、(b)は、それぞれ、本発明の直流給電システムの第二、第三の具体例の回路図である。(a), (b) is a circuit diagram of the second and third specific examples of the DC power feeding system of the present invention, respectively. 従来の直流給電システムの回路図である。It is a circuit diagram of the conventional DC power supply system.

符号の説明Explanation of symbols

１、１０１ 整流装置
２、１０２ 電流分配装置
３、４、１０３、１０４ 通信装置
５、８、１０５、１０８ 系統保護用ヒューズ
６、９、１０６、１０９ 入力コンデンサ、
７、１０、１０７、１１０ 通信装置ユニット
１１、１２ ダイオード
1, 101 Rectifier 2, 102 Current distributor 3, 4, 103, 104 Communication device 5, 8, 105, 108 System protection fuse 6, 9, 106, 109 Input capacitor,
7, 10, 107, 110 Communication device unit 11, 12 Diode

Claims (3)

電源装置と前記電源装置から供給される電力を複数の負荷装置に分配する電流分配装置とからなる直流給電システムにおいて、過電流保護用のヒューズに直列に逆流防止用のダイオードを接続したことを特徴とする電流分配装置。 In a DC power supply system including a power supply device and a current distribution device that distributes power supplied from the power supply device to a plurality of load devices, a backflow prevention diode is connected in series to an overcurrent protection fuse. A current distribution device. 請求項１記載の電流分配装置を有する直流給電システム。 A DC power supply system comprising the current distribution device according to claim 1. 電源装置と前記電源装置から供給される電力を複数の負荷装置に分配する電流分配装置とからなる直流給電システムから電力を供給され、供給電力を入力する端子と入力コンデンサの間に逆流防止用のダイオードを配置したことを特徴とする負荷装置。 Power is supplied from a DC power supply system that includes a power supply device and a current distribution device that distributes the power supplied from the power supply device to a plurality of load devices. A load device comprising a diode.
JP2006152952A 2006-06-01 2006-06-01 Current divider Pending JP2007325413A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009240019A (en) * 2008-03-26 2009-10-15 Nippon Telegr & Teleph Corp <Ntt> Current distribution device
JP2009273353A (en) * 2008-05-07 2009-11-19 Northern Lights Semiconductor Corp Energy storage system
JP2010263709A (en) * 2009-05-08 2010-11-18 Nippon Telegr & Teleph Corp <Ntt> Limiting current control device and current distribution device using the same, and method of controlling limiting current
JP2011130636A (en) * 2009-12-21 2011-06-30 Nippon Telegr & Teleph Corp <Ntt> Current distribution apparatus
JP2012070110A (en) * 2010-09-22 2012-04-05 Yaskawa Electric Corp Overcurrent protection device and laser device
CN104682373A (en) * 2013-11-29 2015-06-03 欧姆龙株式会社 Backdraft prevention device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5473931U (en) * 1977-11-05 1979-05-25
JPS5666147U (en) * 1979-10-24 1981-06-02
JP2005251702A (en) * 2004-03-08 2005-09-15 Ntt Power & Building Facilities Inc Fuse with rush current suppression function and current distribution device using this

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5473931U (en) * 1977-11-05 1979-05-25
JPS5666147U (en) * 1979-10-24 1981-06-02
JP2005251702A (en) * 2004-03-08 2005-09-15 Ntt Power & Building Facilities Inc Fuse with rush current suppression function and current distribution device using this

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009240019A (en) * 2008-03-26 2009-10-15 Nippon Telegr & Teleph Corp <Ntt> Current distribution device
JP2009273353A (en) * 2008-05-07 2009-11-19 Northern Lights Semiconductor Corp Energy storage system
JP2010263709A (en) * 2009-05-08 2010-11-18 Nippon Telegr & Teleph Corp <Ntt> Limiting current control device and current distribution device using the same, and method of controlling limiting current
JP2011130636A (en) * 2009-12-21 2011-06-30 Nippon Telegr & Teleph Corp <Ntt> Current distribution apparatus
JP2012070110A (en) * 2010-09-22 2012-04-05 Yaskawa Electric Corp Overcurrent protection device and laser device
CN104682373A (en) * 2013-11-29 2015-06-03 欧姆龙株式会社 Backdraft prevention device

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