JP2006101565A - Power circuit, power system, and electronic equipment where protective function is reinforced each - Google Patents
Power circuit, power system, and electronic equipment where protective function is reinforced each Download PDFInfo
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Abstract
Description
本発明は、並列に接続して運転する電源回路、およびそれらを含む電源システムまたは電子装置に関する。 The present invention relates to a power supply circuit that is connected and operated in parallel, and a power supply system or electronic device including them.
従来の技術として、電子装置などに使用する電源回路は、出力電流の増加や信頼性向上などの目的のために、複数の電源回路を並列接続した構成にすることがある。 As a conventional technique, a power supply circuit used for an electronic device or the like may have a configuration in which a plurality of power supply circuits are connected in parallel for the purpose of increasing an output current or improving reliability.
出力電流の増加のための電源回路の並列接続については、DENSEI-LAMBDA社 スイッチング電源・ノイズフィルタ総合カタログ ２００４ Ver.１、B-３１ページ「４ 並列運転アプリケーションノート」の項に記載されている。この例では、並列接続する各電源回路の制御回路のPC端子と呼ばれる並列運転信号端子を接続し、各電源回路の出力電圧を一致させることで、各電源回路の出力電流がほぼ均等に分担されるようになる。この技術を用いれば、電子装置の負荷電流が、１個の電源回路の出力電流容量を超える場合でも、複数の電源回路を並列運転することで、所望の負荷電流を供給することができる。このようにして、複数の電源回路を有する電源システムを構成することができる。 The parallel connection of the power supply circuit for increasing the output current is described in the section “4 Parallel Operation Application Note” on page B-31, DENSEI-LAMBDA Switching Power Supply / Noise Filter General Catalog 2004 Ver.1. In this example, the parallel operation signal terminal called PC terminal of the control circuit of each power supply circuit connected in parallel is connected, and the output voltage of each power supply circuit is matched, so that the output current of each power supply circuit is almost equally shared. Become so. By using this technology, even when the load current of the electronic device exceeds the output current capacity of one power supply circuit, a desired load current can be supplied by operating a plurality of power supply circuits in parallel. In this manner, a power supply system having a plurality of power supply circuits can be configured.
また、信頼性向上のための電源回路の並列接続方法については、特開平７-１９４１１８号公報に記載されている。この技術を用いれば、高い信頼性が要求される電子装置の場合でも、電源回路N個分の負荷電流に対し、N+１個以上の電源回路を並列接続しておけば、電源回路が１個故障した場合でも、電源システムの運転を継続することが可能となり、また、電源システムあるいは電子装置を停止させることなく故障した電源回路のみを交換することが可能となる。但し、このように故障した電源回路で電子装置を停止させることなく交換して良いのは、故障した電源回路が他の電源の部品に故障を発生させない場合のみである。 A method for connecting power supply circuits in parallel for improving reliability is described in Japanese Patent Laid-Open No. 7-194118. If this technology is used, even in the case of an electronic device that requires high reliability, if N + 1 or more power supply circuits are connected in parallel to the load current of N power supply circuits, the power supply circuit will be 1 Even when an individual failure occurs, it is possible to continue the operation of the power supply system, and it is possible to replace only the failed power supply circuit without stopping the power supply system or the electronic device. However, the replacement of the electronic device without stopping the electronic device in such a failed power supply circuit is possible only when the failed power supply circuit does not cause a failure in other power supply components.
従来の技術では、電源回路への電流の逆流を防止する目的として、電源回路の出力段に保護ダイオードなどの保護素子を接続する。しかし、この保護素子によりコストや発熱損失が増大してしまう。 In the conventional technology, a protective element such as a protective diode is connected to the output stage of the power supply circuit for the purpose of preventing the backflow of current to the power supply circuit. However, this protection element increases cost and heat loss.
図５は従来の技術において、出力段の保護素子を無くした構成の図である。 FIG. 5 is a diagram showing a configuration in which the output stage protection element is eliminated in the prior art.
電源回路PsC１はパワー回路PC１と制御回路CC１、そして保護機構PT１から構成されている。電源回路PsC２は電源回路PsC１と同型である。電源回路のそれぞれの出力端子は共通に接続して、負荷Loに給電する構成である。パワー回路PC１から保護機構PT１へ入力電圧Vin１と出力電圧Vout１を入力する。制御回路CC１は、並列接続された他電源回路PsC２等の制御回路CC２等と制御線ＰＣＬにより並列接続されている。制御回路CC１では、停止信号Ssp１と、制御線ＰＣＬからの他電源の情報をもとに出力制御信号Ctl１を生成し、パワー回路PC１へ出力する。保護機構PT1では、入力電圧Vin１と出力電圧Vout１をもとに停止信号Ssp１を生成し、制御回路CC1に出力する。この電源システムは、出力段に保護ダイオードなどの保護素子が無い構成としているので、コストや電力損失が小さいなどのメリットがある。しかしパワー回路の出力の整流素子がショート故障する場合には、その整流素子を含む電源回路は自ら故障を検知して停止するが、他の電源はその故障を検知できないので動作し続けるため、そのショート故障した整流素子に他の電源回路から電流が流れ込み続けるので、その影響により他の電源の部品が故障する場合がある。このように、故障の被害が拡大する場合がある。 The power supply circuit PsC1 includes a power circuit PC1, a control circuit CC1, and a protection mechanism PT1. The power supply circuit PsC2 is the same type as the power supply circuit PsC1. Each output terminal of the power supply circuit is connected in common to supply power to the load Lo. The input voltage Vin1 and the output voltage Vout1 are input from the power circuit PC1 to the protection mechanism PT1. The control circuit CC1 is connected in parallel with a control circuit CC2 and the like such as another power supply circuit PsC2 connected in parallel by a control line PCL. The control circuit CC1 generates an output control signal Ctl1 based on the stop signal Ssp1 and information on the other power supply from the control line PCL, and outputs it to the power circuit PC1. The protection mechanism PT1 generates a stop signal Ssp1 based on the input voltage Vin1 and the output voltage Vout1, and outputs it to the control circuit CC1. Since this power supply system has a configuration without a protective element such as a protective diode in the output stage, there are advantages such as low cost and low power loss. However, when the rectifier element at the output of the power circuit has a short circuit failure, the power supply circuit that includes the rectifier element stops by detecting the failure itself, but other power supplies continue to operate because they cannot detect the failure. Since the current continues to flow from the other power supply circuit into the short-circuited rectifying element, other power supply components may fail due to the influence. In this way, the damage of failure may increase.
複数の電源回路を並列接続して構成される電源システム、特に冗長構成の電源システムにおいて、１台の電源回路の故障が他の電源の部品に故障を発生させ、被害が拡大する場合がある。 In a power supply system configured by connecting a plurality of power supply circuits in parallel, particularly in a redundant power supply system, a failure of one power supply circuit may cause a failure in other power supply components, resulting in a greater damage.
本発明の目的は、電源回路、電源システムあるいは電子装置において、電源回路の故障の被害拡大の防止を図ることにある。 SUMMARY OF THE INVENTION An object of the present invention is to prevent damage caused by power supply circuit failure in a power supply circuit, a power supply system, or an electronic device.
上記主たる目的は、並列接続している電源回路において、電源の異常状態を外部に出力する信号を備え、該信号により他の並列接続された電源回路を停止させる機構を設けることにより達成する。並列接続している電源回路のうち、少なくとも１台が異常状態となった場合、その異常状態の電源回路は自己のパワー回路を停止させ、また他の電源回路もパワー回路を停止させる。その結果、電源故障時の被害の拡大を防止することができる。 The above main object is achieved by providing a power supply circuit connected in parallel with a signal that outputs an abnormal power supply state to the outside and stopping another power supply circuit connected in parallel by the signal. If at least one of the power supply circuits connected in parallel is in an abnormal state, the power circuit in the abnormal state stops its own power circuit, and other power supply circuits also stop the power circuit. As a result, it is possible to prevent the spread of damage at the time of power failure.
本発明によれば、１個の電源回路が故障した場合の被害の拡大を防止することができ、損失金額の削減、修理費用の削減、修理時間の短縮などの効果がある。 ADVANTAGE OF THE INVENTION According to this invention, the expansion of damage when one power supply circuit fails can be prevented, and there are effects, such as reduction of a loss amount, reduction of repair cost, and shortening of repair time.
以下、本発明の実施の形態を図面に基づいて詳細に説明する。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
図１は本発明の第１の実施例を示す電源システムのブロック図である。 FIG. 1 is a block diagram of a power supply system showing a first embodiment of the present invention.
電源回路PsC１はパワー回路PC１と制御回路CC１、そして保護機構PT１から構成されている。電源回路PsC２は電源回路PsC１と同型である。電源回路のそれぞれの出力端子は共通に接続され、負荷Loに給電する構成である。パワー回路PC１から保護機構PT１へ入力電圧Vin１と出力電圧Vout１を入力する。制御回路CC１は、並列接続された他電源回路PsC２等の制御回路CC２等と、制御線ＰＣＬにより接続されている。制御回路CC１では、停止信号Ssp１と制御線ＰＣＬからの他電源の情報をもとに出力制御信号Ctl１を生成し、パワー回路PC１へ出力する。保護機構PT１では、入力電圧Vin１と出力電圧Vout１と並列電源の異常情報入力ＡＢｉｎを基に停止信号Ssp１を生成し、保護回路CC1に出力する。また保護機構PT１からは異常情報出力ABout１が電源回路外部へ出力する。並列電源の異常情報入力ＡＢｉｎは、電源回路PsC１の異常情報出力ABout１と電源回路PsC２の異常情報出力ABout２をOR回路OR１により論理ORをとることで生成され、並列接続された全ての電源回路の保護機構へ入力される。このように並列接続された全電源回路の異常情報出力の論理ORをとって異常情報入力を生成することにより、１つの電源回路が異常状態により停止する場合に、他の電源回路も停止させることができ、被害の拡大を防止することができる。 The power supply circuit PsC1 includes a power circuit PC1, a control circuit CC1, and a protection mechanism PT1. The power supply circuit PsC2 is the same type as the power supply circuit PsC1. Each output terminal of the power supply circuit is connected in common and is configured to supply power to the load Lo. The input voltage Vin1 and the output voltage Vout1 are input from the power circuit PC1 to the protection mechanism PT1. The control circuit CC1 is connected to a control circuit CC2 and the like such as another power supply circuit PsC2 connected in parallel by a control line PCL. In the control circuit CC1, the output control signal Ctl1 is generated based on the stop signal Ssp1 and the information of the other power supply from the control line PCL, and is output to the power circuit PC1. The protection mechanism PT1 generates a stop signal Ssp1 based on the input voltage Vin1, the output voltage Vout1, and the abnormality information input ABin of the parallel power supply, and outputs it to the protection circuit CC1. Further, the abnormality information output ABout1 is output from the protection mechanism PT1 to the outside of the power supply circuit. The parallel power supply abnormality information input ABin is generated by logically ORing the abnormality information output ABout1 of the power supply circuit PsC1 and the abnormality information output ABout2 of the power supply circuit PsC2 by the OR circuit OR1, and protecting all the power supply circuits connected in parallel Input to the mechanism. In this way, by taking a logical OR of the abnormality information output of all the power supply circuits connected in parallel and generating the abnormality information input, when one power supply circuit is stopped due to an abnormal state, the other power supply circuit is also stopped. Can prevent the spread of damage.
本発明の制御機構の詳細例を図２より説明する。過電流検出機構Isと過電圧検出機構Vsには、入力電圧Vin１と出力電圧Vout１が入力される。過電流検出機構Isの出力と過電圧検出機構Vsの出力と過熱検出機構Tsの出力と並列電源の異常情報入力ＡＢｉｎは、OR回路OR２により論理ORをとり、保持回路LatCに入力される。保持回路LatCでは、OR回路OR２の出力がアクティブになるとそれを保持し、それに応じて停止信号Ssp１と異常情報出力ABout１が生成される。なおLatCの値は、Ｃｌｅａｒ信号によりリセット可能であり、Ｃｌｅａｒ信号端子は適宜上位の電源制御機構に接続される。 A detailed example of the control mechanism of the present invention will be described with reference to FIG. An input voltage Vin1 and an output voltage Vout1 are input to the overcurrent detection mechanism Is and the overvoltage detection mechanism Vs. The output of the overcurrent detection mechanism Is, the output of the overvoltage detection mechanism Vs, the output of the overheat detection mechanism Ts, and the abnormality information input ABin of the parallel power supply are logically ORed by the OR circuit OR2 and input to the holding circuit LatC. In the holding circuit LatC, when the output of the OR circuit OR2 becomes active, it is held, and accordingly, the stop signal Ssp1 and the abnormality information output ABout1 are generated. Note that the value of LatC can be reset by a Clear signal, and the Clear signal terminal is appropriately connected to a host power control mechanism.
図３は本発明の第２の実施例を示す電源システムのブロック図である。 FIG. 3 is a block diagram of a power supply system showing a second embodiment of the present invention.
電源回路の構成は、第１の実施例の電源回路と同型である。電源回路のそれぞれの出力には電流・電圧異常検知センサＳＥＮＳ１，ＳＥＮＳ２を接続し、出力はそのセンサを介した後で共通に接続され、負荷Loに給電する構成である。電流・電圧異常検知センサＳＥＮＳ１，ＳＥＮＳ２は、過電流，逆電流，過電圧などの電流・電圧の異常状態を検知するセンサである。並列電源の異常情報入力ＡＢｉｎは、電流・電圧異常検知センサＳＥＮＳ１，ＳＥＮＳ２のそれぞれの異常情報出力Sout１，Sout２をOR回路OR３により論理ORをとった信号である。このように接続された電源回路の電流・電圧の異常情報出力の論理ORをとって異常情報入力を生成することにより、１つの電源回路の出力が異常状態になる場合に、並列接続されている電源回路を停止させることができ、被害の拡大を防止することができる。 The configuration of the power supply circuit is the same as that of the power supply circuit of the first embodiment. A current / voltage abnormality detection sensor SENS1, SENS2 is connected to each output of the power supply circuit, and the output is connected in common after passing through the sensor to supply power to the load Lo. The current / voltage abnormality detection sensors SENS1, SENS2 are sensors that detect current / voltage abnormality states such as overcurrent, reverse current, and overvoltage. The abnormality information input ABin of the parallel power supply is a signal obtained by logically ORing the abnormality information outputs Sout1 and Sout2 of the current / voltage abnormality detection sensors SENS1 and SENS2 by the OR circuit OR3. When the output of one power supply circuit is in an abnormal state by taking the logical OR of the current / voltage abnormality information output of the power supply circuit thus connected and generating the abnormality information input, the power supply circuits are connected in parallel. The power supply circuit can be stopped, and the spread of damage can be prevented.
図４は本発明の第３の実施例を示す電源システムのブロック図である。 FIG. 4 is a block diagram of a power supply system showing a third embodiment of the present invention.
電源回路の構成は、第１の実施例の電源回路と同型である。電源回路のそれぞれの出力は共通に接続され、負荷Loに給電する構成である。それぞれの電源回路の近傍に温度異常検知センサＴｓｅｎｓ１，Ｔｓｅｎｓ２を配置している。並列電源の異常情報入力ＡＢｉｎは、温度異常検知センサＴｓｅｎｓ１，Ｔｓｅｎｓ２のそれぞれの異常情報出力Tsout１，Tsout２をOR回路OR４により論理ORをとった信号である。このように並列接続された全電源回路の近傍の温度の異常情報出力のORをとって異常情報入力を生成することにより、１つの電源回路の温度が異常状態になる場合に、並列接続されている電源回路を停止させることができ、電源回路による異常発熱を無くすことにより、被害の拡大を防止することができる。 The configuration of the power supply circuit is the same as that of the power supply circuit of the first embodiment. Each output of the power supply circuit is connected in common and is configured to supply power to the load Lo. Temperature abnormality detection sensors Tsen1 and Tsens2 are arranged in the vicinity of each power supply circuit. The abnormality information input ABin of the parallel power supply is a signal obtained by logically ORing the abnormality information outputs Tsout1 and Tsout2 of the temperature abnormality detection sensors Tsens1 and Tsens2 by the OR circuit OR4. By generating an abnormal information input by ORing the temperature abnormal information output in the vicinity of all power supply circuits connected in parallel in this way, when the temperature of one power supply circuit becomes an abnormal state, it is connected in parallel The power supply circuit can be stopped, and the abnormal heat generation by the power supply circuit can be eliminated to prevent the damage from spreading.
本発明は前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で種々変更可能であることは言うまでもない。例えば、電源システムを構成する並列接続の電源回路の数は２個以上でも構わないし、異常状態を検知するセンサの数は電源回路１個あたり１個以上でも構わない。そして、上記の実施例を２つ以上組み合わせた構成でも構わない。 It goes without saying that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. For example, the number of parallel-connected power supply circuits constituting the power supply system may be two or more, and the number of sensors for detecting an abnormal state may be one or more per power supply circuit. And the structure which combined two or more said Example may be sufficient.
本発明は、電子装置に一般に広く利用することができる。すなわち、電子産業界で広く利用・応用が可能である。 The present invention can be widely used for electronic devices in general. That is, it can be widely used and applied in the electronic industry.
ＰｓＣ１，ＰｓＣ２，ＰｓＣ３ … 電源回路
ＰＣ１，ＰＣ２ … パワー回路
ＣＣ１，ＣＣ２ … 制御回路
ＰＴ１，ＰＴ２ … 保護機構
ＰＣＬ … 制御線
Ｖｉｎ１，Ｖｉｎ２ … 入力電圧
Ｖｏｕｔ１，Ｖｏｕｔ２ … 出力電圧
Ｃｔｌ１，Ｃｔｌ２ … パワー回路停止信号
Ｃｌｅａｒ … クリア信号
ＡＢｉｎ … 並列電源の異常情報入力
ＡＢｏｕｔ１，ＡＢｏｕｔ２，Ｓｏｕｔ１，Ｓｏｕｔ２，Ｔｓｏｕｔ１，Ｔｓｏｕｔ２ … 異常情報出力
ＯＲ１，ＯＲ２，ＯＲ３，ＯＲ４ … OR回路
ＳＥＮＳ１，ＳＥＮＳ２ … 電流・電圧異常検知センサ
Ｔｓｅｎｓ１，Ｔｓｅｎｓ２ … 温度異常検知センサ
Ｓｓｐ１，Ｓｓｐ２ … 停止信号
Ｓ … 電源ソース
Ｌｏ … 負荷
Ｉｓ … 過電流検出機構
Ｖｓ … 過電圧検出機構
Ｔｓ … 過熱検出機構
ＬａｔＣ … 保持回路
PsC1, PsC2, PsC3 ... Power supply circuit PC1, PC2 ... Power circuit CC1, CC2 ... Control circuit PT1, PT2 ... Protection mechanism PCL ... Control line Vin1, Vin2 ... Input voltage Vout1, Vout2 ... Output voltage Ctl1, Ctl2 ... Power circuit stop signal Clear ... Clear signal ABin ... Parallel power supply abnormality information input ABout1, ABout2, Sout1, Sout2, Tsout1, Tsout2 ... Abnormal information output OR1, OR2, OR3, OR4 ... OR circuit SENS1, SENS2 ... Current / voltage abnormality detection sensors Tsens1, Tsens2 ... Temperature abnormality detection sensors Ssp1, Ssp2 ... Stop signal S ... Power source Lo ... Load Is ... Overcurrent detection mechanism Vs ... Overvoltage detection mechanism Ts ... Overheat detection mechanism LatC ... Holding circuit
Claims (6)
An electronic device comprising at least one power supply system according to claim 3 or 4.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013188102A (en) * | 2012-03-12 | 2013-09-19 | Denso Corp | On-board power system |
| US8884627B2 (en) | 2009-06-18 | 2014-11-11 | Toyota Jidosha Kabushiki Kaisha | Apparatus for detecting short-circuit of output diode in converter |
| EP2820748A4 (en) * | 2012-03-01 | 2015-03-04 | Ericsson Telefon Ab L M | Method for remote control of a power converter module and a device therefor |
| JP2016134951A (en) * | 2015-01-16 | 2016-07-25 | Fdk株式会社 | Switching power supply device with reverse current protection |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5432732A (en) * | 1977-08-17 | 1979-03-10 | Nec Corp | Power source apparatus |
| JPS6323518A (en) * | 1986-07-14 | 1988-01-30 | 日本電気株式会社 | Electric source protecting system |
| JPH01318506A (en) * | 1988-06-16 | 1989-12-25 | Fujitsu Ltd | Protective circuit against overvoltage |
| JPH02142322A (en) * | 1988-11-18 | 1990-05-31 | Fujitsu Ltd | Power source start/stop controlling circuit |
| JPH05168232A (en) * | 1991-12-18 | 1993-07-02 | Koufu Nippon Denki Kk | Switching power system |
| JPH07194118A (en) * | 1993-12-27 | 1995-07-28 | Hitachi Ltd | Power supply system |
| JP2001095257A (en) * | 1999-09-22 | 2001-04-06 | Yuasa Corp | Multi-phase power factor improved converter |
| JP2001178022A (en) * | 1999-12-22 | 2001-06-29 | Origin Electric Co Ltd | Control method and device for dc uninterruptive power supply |
-
2004
- 2004-09-28 JP JP2004280835A patent/JP4617804B2/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5432732A (en) * | 1977-08-17 | 1979-03-10 | Nec Corp | Power source apparatus |
| JPS6323518A (en) * | 1986-07-14 | 1988-01-30 | 日本電気株式会社 | Electric source protecting system |
| JPH01318506A (en) * | 1988-06-16 | 1989-12-25 | Fujitsu Ltd | Protective circuit against overvoltage |
| JPH02142322A (en) * | 1988-11-18 | 1990-05-31 | Fujitsu Ltd | Power source start/stop controlling circuit |
| JPH05168232A (en) * | 1991-12-18 | 1993-07-02 | Koufu Nippon Denki Kk | Switching power system |
| JPH07194118A (en) * | 1993-12-27 | 1995-07-28 | Hitachi Ltd | Power supply system |
| JP2001095257A (en) * | 1999-09-22 | 2001-04-06 | Yuasa Corp | Multi-phase power factor improved converter |
| JP2001178022A (en) * | 1999-12-22 | 2001-06-29 | Origin Electric Co Ltd | Control method and device for dc uninterruptive power supply |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8884627B2 (en) | 2009-06-18 | 2014-11-11 | Toyota Jidosha Kabushiki Kaisha | Apparatus for detecting short-circuit of output diode in converter |
| EP2820748A4 (en) * | 2012-03-01 | 2015-03-04 | Ericsson Telefon Ab L M | Method for remote control of a power converter module and a device therefor |
| US9584013B2 (en) | 2012-03-01 | 2017-02-28 | Telefonaktiebolaget L M Ericsson (Publ) | Method for remote control of a power converter module and a device therefor |
| JP2013188102A (en) * | 2012-03-12 | 2013-09-19 | Denso Corp | On-board power system |
| US9030140B2 (en) | 2012-03-12 | 2015-05-12 | Denso Corporation | In-vehicle power supply system with multiple voltage-reducing devices |
| JP2016134951A (en) * | 2015-01-16 | 2016-07-25 | Fdk株式会社 | Switching power supply device with reverse current protection |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4617804B2 (en) | 2011-01-26 |
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