JPH02254968A - Voltage detection system - Google Patents

Voltage detection system

Info

Publication number
JPH02254968A
JPH02254968A JP7229389A JP7229389A JPH02254968A JP H02254968 A JPH02254968 A JP H02254968A JP 7229389 A JP7229389 A JP 7229389A JP 7229389 A JP7229389 A JP 7229389A JP H02254968 A JPH02254968 A JP H02254968A
Authority
JP
Japan
Prior art keywords
power supply
output voltage
output
load
detecting
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.)
Granted
Application number
JP7229389A
Other languages
Japanese (ja)
Other versions
JP2827263B2 (en
Inventor
Takeshi Tsutsumi
剛 堤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Priority to JP7229389A priority Critical patent/JP2827263B2/en
Publication of JPH02254968A publication Critical patent/JPH02254968A/en
Application granted granted Critical
Publication of JP2827263B2 publication Critical patent/JP2827263B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Power Conversion In General (AREA)
  • Protection Of Static Devices (AREA)
  • Dc-Dc Converters (AREA)

Abstract

PURPOSE:To prevent the malfunction of a system by a method wherein the value of a detecting voltage from an output voltage detecting unit is compared with the values of set voltages, set in two stages, and an alarm signal is outputted to a load upon the generation of abnormality, then, power supply is stopped with a time lag. CONSTITUTION:A system is provided with an input filter 1, a switching unit 2, opening and closing a circuit, a rectifying unit 3, an output filter 4, a load 5, an output voltage detecting unit 6, detecting the output voltage of a switching power supply, and control unit 7, comparing the values of detecting voltages from the output voltage detecting unit 6 with the values of set voltages set in two stages to output an alarm signal to the load 5 upon the generation of abnormality and, thereafter, stopping power supply with a time lag. By employing this detecting method, the backup time of the memory of the load 5 may be secured previously even when the output of the switching power supply become an abnormal voltage and the operation of the same is stopped. Accordingly, the malfunction of the system may be prevented.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明はスイッチング電源に関し、特にその出力電圧の
検出方式に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a switching power supply, and particularly to a method for detecting its output voltage.

〔従来の技術〕[Conventional technology]

従来、この種のスイッチング電源の出力電圧検出方式は
、定格出力電圧値を中心に過剰電圧値及び不足電圧値を
設定し、出力電圧が設定値に達すると、電源を停止する
方式であった。Conventionally, the output voltage detection method of this type of switching power supply has been a method in which an excess voltage value and an undervoltage value are set around the rated output voltage value, and when the output voltage reaches the set value, the power supply is stopped.

〔発明が解決しよう′とする課題〕[Problem that the invention attempts to solve]

上述した従来例では、出力電圧が過剰、不足電圧設定値
に達すると、スイッチング電源は直ちに停止するので、
負荷側でメモリーのバックアップ時間を確保するのが回
置となり、システムが誤動作するという欠点がある。In the conventional example described above, when the output voltage reaches the excessive or undervoltage setting value, the switching power supply immediately stops.
The disadvantage is that the memory backup time is secured on the load side, which causes the system to malfunction.

本発明の目的は前記課題を解決した電圧検出方式を提供
す°ることにある。An object of the present invention is to provide a voltage detection method that solves the above problems.

〔課題を解決するための手段〕[Means to solve the problem]

前記目的を達成するため、本発明に係る電圧検出方式は
、スイッチング電源の出力電圧を検出する出力電圧検出
部と、該出力電圧検出部からの検出電圧値を２段階に設
定した設定電圧値と比較し。In order to achieve the above object, the voltage detection method according to the present invention includes an output voltage detection section that detects the output voltage of a switching power supply, and a set voltage value in which the detected voltage value from the output voltage detection section is set in two stages. Compare.

異常発生時に負荷に対して警報信号を発した後、タイム
ラグをもって電源の停止を行う制御部とを有するもので
ある。The control unit includes a control unit that issues an alarm signal to the load when an abnormality occurs and then stops the power supply with a time lag.

〔実施例〕〔Example〕

以下、本発明の一実施例を図により説明する。 Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

第１図は本発明の一実施例を示すブロック図、第２図は
出力の異常電圧検出レベルの設定値を示す図である。FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a diagram showing a set value of an output abnormal voltage detection level.

図において、１は入力フィルタ、２は回路を開閉するス
イッチング部、３は整流部、４は出力フィルタ、５は負
荷である。６はスイッチング電源の出力電圧を検出する
出力電圧検出部、７は出力電圧検出部６からの検出電圧
値を２段階に設定した設定電圧値（第２図参照）と比較
し、異常発生時に負荷に対して警報信号を発した後、タ
イムラグをもって電源の停止を行う制御部である。In the figure, 1 is an input filter, 2 is a switching section that opens and closes the circuit, 3 is a rectifier, 4 is an output filter, and 5 is a load. 6 is an output voltage detection unit that detects the output voltage of the switching power supply, and 7 is an output voltage detection unit that compares the detected voltage value from the output voltage detection unit 6 with a set voltage value set in two stages (see Figure 2), and detects the load when an abnormality occurs. This is a control unit that stops the power supply with a time lag after issuing an alarm signal.

実施例において、出力電圧が変動し、出力電圧検出部６
の検出出力電圧が第２図に示す過剰電圧■及び不足電圧
Ｉに達すると、制御部７は負荷に対し警報信号を負荷５
に送出する。この時点ではスイッチング電源の動作は停
止させない、さらに出力電圧が変動し、過剰電圧■、不
足電圧■に達した時点で制御部７はスイッチング部２に
対しスイッチング電源の動作を停止する指令を発し、ス
イッチング電源からの供給を停止させる。負荷５側では
、警報信号を受けた時点からメモリーのバックアップを
行うが、この時点ではスイッチング電源は動作を停止し
ていないので、バックアップ時間を十分数ることができ
、システムの誤動作を防止することができる。In the embodiment, the output voltage varies and the output voltage detection section 6
When the detected output voltage reaches the excessive voltage (■) and undervoltage (I) shown in FIG.
Send to. At this point, the operation of the switching power supply is not stopped, and when the output voltage fluctuates and reaches excessive voltage (■) and undervoltage (■), the control unit 7 issues a command to the switching unit 2 to stop the operation of the switching power supply, Stop the supply from the switching power supply. On the load 5 side, the memory is backed up from the time the alarm signal is received, but since the switching power supply has not stopped operating at this point, the backup time can be sufficiently increased to prevent system malfunctions. I can do it.

〔発明の効果〕〔Effect of the invention〕

以上説明したように本発明は、スイッチング電源の出力
の異常電圧検出において二段階の検出方式を用いること
により、スイッチング電源の出力が異常電圧になり動作
が停止に至る状態になっても、事前に負荷のメモリーの
バックアップ時間を確保することが可能であり、システ
ムの誤動作を防止することができるという効果がある。As explained above, the present invention uses a two-step detection method to detect abnormal voltage at the output of a switching power supply, so that even if the output of the switching power supply reaches an abnormal voltage and the operation stops, it can be detected in advance. It is possible to secure backup time for the load memory, and has the effect of preventing system malfunctions.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本発明の一実施例を示すブロック図、第２図は
出力の異常電圧検出レベルの設定値を示す図である。 １・・・入力フィルタ　　　　２・・・スイッチング部
３・・・整流部　　　　　　　４・・・出力フィルタ５
・・・負荷　　　　　　　　６・・・出力電圧検出部７
・・・制御部 過剰電圧■ 過重り電圧工 出力電圧 不足電圧工 不足電圧■ 第２図FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a diagram showing a set value of an output abnormal voltage detection level. 1... Input filter 2... Switching section 3... Rectifier section 4... Output filter 5
...Load 6...Output voltage detection section 7
...Control unit excess voltage■ Overload voltage unit output voltage Undervoltage unit Undervoltage■ Figure 2

Claims (1)

【特許請求の範囲】[Claims] （１）スイッチング電源の出力電圧を検出する出力電圧
検出部と、該出力電圧検出部からの検出電圧値を２段階
に設定した設定電圧値と比較し、異常発生時に負荷に対
して警報信号を発した後、タイムラグをもって電源の停
止を行う制御部とを有することを特徴とする電圧検出方
式。(1) An output voltage detection section detects the output voltage of the switching power supply, and the detected voltage value from the output voltage detection section is compared with a set voltage value set in two stages, and an alarm signal is sent to the load when an abnormality occurs. A voltage detection method characterized by comprising a control section that stops the power supply with a time lag after the voltage is generated.
JP7229389A 1989-03-25 1989-03-25 Voltage detection method Expired - Lifetime JP2827263B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7229389A JP2827263B2 (en) 1989-03-25 1989-03-25 Voltage detection method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7229389A JP2827263B2 (en) 1989-03-25 1989-03-25 Voltage detection method

Publications (2)

Publication Number Publication Date
JPH02254968A true JPH02254968A (en) 1990-10-15
JP2827263B2 JP2827263B2 (en) 1998-11-25

Family

ID=13485076

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7229389A Expired - Lifetime JP2827263B2 (en) 1989-03-25 1989-03-25 Voltage detection method

Country Status (1)

Country Link
JP (1) JP2827263B2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004320825A (en) * 2003-04-10 2004-11-11 Densei Lambda Kk Power supply
GB2392501B (en) * 2002-08-30 2005-10-19 Lattice Intellectual Property Meter condition monitoring device
JP2008160934A (en) * 2006-12-21 2008-07-10 Sharp Corp Power supply circuit and electronic equipment using the same
JP2009100500A (en) * 2007-10-15 2009-05-07 Nichicon Corp Power supply unit
JP2018064324A (en) * 2016-10-11 2018-04-19 Ｎｅｃプラットフォームズ株式会社 Power supply circuit and power supply control method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2392501B (en) * 2002-08-30 2005-10-19 Lattice Intellectual Property Meter condition monitoring device
JP2004320825A (en) * 2003-04-10 2004-11-11 Densei Lambda Kk Power supply
JP2008160934A (en) * 2006-12-21 2008-07-10 Sharp Corp Power supply circuit and electronic equipment using the same
JP2009100500A (en) * 2007-10-15 2009-05-07 Nichicon Corp Power supply unit
JP2018064324A (en) * 2016-10-11 2018-04-19 Ｎｅｃプラットフォームズ株式会社 Power supply circuit and power supply control method

Also Published As

Publication number Publication date
JP2827263B2 (en) 1998-11-25

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