JP2002031063A - Water hammering preventing device for motor-driven pump - Google Patents
Water hammering preventing device for motor-driven pumpInfo
- Publication number
- JP2002031063A JP2002031063A JP2000218546A JP2000218546A JP2002031063A JP 2002031063 A JP2002031063 A JP 2002031063A JP 2000218546 A JP2000218546 A JP 2000218546A JP 2000218546 A JP2000218546 A JP 2000218546A JP 2002031063 A JP2002031063 A JP 2002031063A
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- inverter
- pump
- switch
- electric pump
- 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
- Control Of Positive-Displacement Pumps (AREA)
- Stopping Of Electric Motors (AREA)
Abstract
Description
【０００１】[0001]
【発明の技術分野】本発明は、電源ポンプのウォータハ
ンマ防止装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water hammer prevention device for a power supply pump.
【０００２】[0002]
【従来技術とその問題点】従来、電動ポンプのウォータ
ハンマ防止対策としては一般的に、ポンプ軸にフライホ
イールを装着することにより、慣性モーメントを高めて
急停止させないようにするという手法が採られていた。
しかしこの手法によれば、十分な慣性モーメントを得る
ためには大径・大重量のフライホイールが必要で、ポン
プが大型化・大重量化すると共に構造的にも複雑とな
り、それが製造工期の長期化およびコストアップの要因
となっている。2. Description of the Related Art Conventionally, as a countermeasure against water hammer of an electric pump, a method has been generally adopted in which a flywheel is mounted on a pump shaft so as to increase a moment of inertia and prevent a sudden stop. I was
However, according to this method, a large-diameter / heavy flywheel is necessary to obtain a sufficient moment of inertia, and the pump becomes larger and heavier, and the structure becomes complicated. This is a factor of prolonging the cost and increasing costs.
【０００３】また、フライホイールを装着する代りに、
汎用インバータ装置の標準機能であるスロー停止機能に
よってウォータハンマを防止しようとする試みもあった
が、停電などで電源が遮断されると全く機能しないとい
う重大な欠陥があるため、実用化されるには至らなかっ
た。Also, instead of attaching a flywheel,
Attempts have been made to prevent water hammer by using the slow stop function, which is a standard function of general-purpose inverter devices, but there is a serious defect that it will not function at all if the power is cut off due to a power failure, etc. Did not reach.
【０００４】[0004]
【発明の目的】本発明の目的は、フライホイールの装着
が不要となってポンプを大型化・大重量化させることな
く、且つ、停電など主電源の遮断時においても有効に機
能する、電動ポンプのウォータハンマ防止装置を提供す
ることにある。SUMMARY OF THE INVENTION It is an object of the present invention to provide an electric pump which does not require the installation of a flywheel, does not increase the size and weight of the pump, and functions effectively even when the main power supply is cut off such as a power failure. To provide a water hammer prevention device.
【０００５】[0005]
【発明の構成】本発明に係る電動ポンプのウォータハン
マ防止装置では、インバータ装置の内部に交流主電源の
投入で直流電源を作るコンバータ部および平滑コンデン
サと、運転指令スイッチのＯＮで交流波形を作るインバ
ータ部を有し、インバータ部で作られた交流波形で運転
される電動ポンプにおいて、交流主電源から分岐し充電
部を介して蓄電源に蓄えられた直流補助電源が電源切換
スイッチを介してインバータ部へ至る直流補助電源供給
回路を付設し、電動ポンプ運転中は電源切換スイッチが
ＯＦＦ状態で直流補助電源が電動ポンプに供給されるこ
とがなく、運転指令スイッチのＯＦＦにより予め設定さ
れた減速レートに従ってインバータのスロー停止機能に
より電動ポンプが徐々に減速停止され、交流主電源の遮
断時には電源切換スイッチがＯＮとなって直流補助電源
が供給されると共に運転指令スイッチがＯＦＦとなり予
め設定された減速レートに従ってインバータのスロー停
止機能により電動ポンプが徐々に減速停止されるよう構
成した。In the water hammer prevention device for an electric pump according to the present invention, a converter section and a smoothing capacitor for generating a DC power supply by turning on an AC main power supply in an inverter device, and an AC waveform is formed by turning on an operation command switch. In an electric pump having an inverter section and driven by an AC waveform made by the inverter section, a DC auxiliary power supply branched from an AC main power supply and stored in a storage power supply via a charging section is supplied to the inverter via a power supply changeover switch. A DC auxiliary power supply circuit to the section is provided. During operation of the electric pump, the power supply switch is in the OFF state and DC auxiliary power is not supplied to the electric pump. The electric pump is gradually decelerated and stopped by the slow stop function of the inverter according to Switch is the operation command switch with the auxiliary DC power source turned ON supplied configured such that the electric pump is gradually decelerated stopped by the inverter slow stop function in accordance OFF next preset deceleration rate.
【０００６】[0006]
【実施例】以下実施例の図面により説明をする。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments will be described below with reference to the drawings.
【０００７】１はインバータ装置であり、内部には交流
電源２の投入で直流電源を作るコンバータ部３および平
滑コンデンサ４と、運転指令スイッチ５の閉（ＯＮ）で
交流波形を作るインバータ部６を有している。７はイン
バータ部６で作られた交流波形で運転される電動ポン
プ、８は直流補助電源を蓄える蓄電源であり、交流主電
源２から分岐して充電部９を介して該蓄電源８に蓄えら
れた直流補助電源が電源切換スイッチ１０を介してイン
バータ部６へ至る直流補助電源供給回路が構成される。
上記蓄電源８としては例えば電気二重層コンデンサや鉛
蓄電池などが好適であるが、所定の減速時間だけエネル
ギーが保たれるものであれば必ずしもその種類を特定す
るものではない。Reference numeral 1 denotes an inverter device, which internally includes a converter unit 3 and a smoothing capacitor 4 for generating a DC power supply when an AC power supply 2 is turned on, and an inverter unit 6 for generating an AC waveform when the operation command switch 5 is closed (ON). Have. Reference numeral 7 denotes an electric pump operated by the AC waveform generated by the inverter unit 6, and 8 denotes a storage power source for storing a DC auxiliary power source, which branches off from the AC main power source 2 and stores the power in the storage power source 8 via the charging unit 9. A DC auxiliary power supply circuit is provided in which the supplied DC auxiliary power reaches the inverter unit 6 via the power switch 10.
The storage power source 8 is preferably, for example, an electric double layer capacitor or a lead storage battery, but the type is not necessarily specified as long as the energy can be maintained for a predetermined deceleration time.
【０００８】交流主電源２を投入するとインバータ装置
１のコンバータ部３および平滑コンデンサ４を介して直
流電源が作られ、同時に電源切換スイッチ１０のｂ接点
は開（ＯＦＦ）となるが蓄電源８には充電部９を介して
直流補助電源が蓄えられる。そして例えば外部シーケン
スなどから運転指令スイッチ５のａ接点を閉（ＯＮ）に
すると、インバータ装置１は内部のインバータ部６から
交流波形を作って電動ポンプ７を運転させるが、その
間、電源切換スイッチ１０はＯＦＦであって蓄電源８か
らの直流補助電源は供給されない。When the AC main power supply 2 is turned on, a DC power supply is generated via the converter unit 3 and the smoothing capacitor 4 of the inverter device 1. At the same time, the contact b of the power supply changeover switch 10 is opened (OFF). Stores a DC auxiliary power supply via the charging unit 9. When the a-contact of the operation command switch 5 is closed (ON) from an external sequence or the like, for example, the inverter device 1 generates an AC waveform from the internal inverter section 6 to operate the electric pump 7. Is OFF, and no DC auxiliary power is supplied from the storage power supply 8.
【０００９】通常のポンプ停止時には、外部シーケンス
などから運転指令スイッチ５のａ接点を開（ＯＦＦ）に
すると、インバータ装置１は予め設定された減速レート
に従って徐々に電動ポンプ７を減速停止させてウォータ
ハンマ現象の発生を防止する。When the pump is normally stopped, when the a-contact of the operation command switch 5 is opened (OFF) from an external sequence or the like, the inverter device 1 gradually decelerates and stops the electric pump 7 in accordance with a preset deceleration rate. Prevent the hammer phenomenon from occurring.
【００１０】停電などで交流主電源２が遮断されたとき
は、電源切換スイッチ１０がＯＮとなって蓄電源８に蓄
えられていた直流補助電源が供給され、同時に外部シー
ケンスなどから運転指令スイッチ５がＯＦＦとなり、イ
ンバータ装置１は直流補助電源を使って予め設定された
減速レートに従って徐々に電動ポンプ７を減速停止させ
てウォータハンマ現象の発生を防止する。尚、運転指令
スイッチ５や電源切換スイッチ１０などのスイッチ類は
有接点のものに限らず無接点のものでもよい。When the AC main power supply 2 is cut off due to a power failure or the like, the power supply changeover switch 10 is turned on and the DC auxiliary power stored in the storage power supply 8 is supplied. Is turned off, and the inverter device 1 uses the DC auxiliary power supply to gradually decelerate and stop the electric pump 7 according to a preset deceleration rate, thereby preventing the occurrence of the water hammer phenomenon. The switches such as the operation command switch 5 and the power supply switch 10 are not limited to those having a contact, but may be those having no contact.
【００１１】[0011]
【発明の効果】本発明によれば、フライホイールを用い
ることなくポンプ停止時のウォータハンマを防止できる
ので、従来のように電動ポンプの大型化・大重量化およ
びそれに起因する製造工期の長期化やコストアップを招
くことがなく、且つ、上記ウォータハンマ防止作用が停
電時などにおいても有効に機能するので、産業上の利用
性は多大である。According to the present invention, it is possible to prevent a water hammer when the pump is stopped without using a flywheel, so that the electric pump becomes larger and heavier, and the manufacturing time required for the electric pump is prolonged. Since the water hammer prevention function effectively functions even during a power outage or the like without causing any cost increase and cost, industrial applicability is enormous.
【図面の簡単な説明】[Brief description of the drawings]
【図１】 本発明の実施例におけるブロック図である。FIG. 1 is a block diagram according to an embodiment of the present invention.
１ インバータ装置 ２ 交流主電源 ３ コンバータ部 ４ 平滑コンデンサ ５ 運転指令スイッチ ６ インバータ部 ７ 電動ポンプ ８ 蓄電源 ９ 充電部 １０ 電源切換スイッチ DESCRIPTION OF SYMBOLS 1 Inverter apparatus 2 AC main power supply 3 Converter part 4 Smoothing capacitor 5 Operation command switch 6 Inverter part 7 Electric pump 8 Storage power source 9 Charging part 10 Power switch
Claims (1)
入で直流電源を作るコンバータ部および平滑コンデンサ
と、運転指令スイッチのＯＮで交流波形を作るインバー
タ部を有し、インバータ部で作られた交流波形で運転さ
れる電動ポンプにおいて、交流主電源から分岐して充電
部を介して蓄電源に蓄えられた直流補助電源が電源切換
スイッチを介してインバータ部へ至る直流補助電源供給
回路を付設し、電動ポンプ運転中は電源切換スイッチが
ＯＦＦ状態で直流補助電源が電動ポンプに供給されるこ
とがなく、運転指令スイッチのＯＦＦにより予め設定さ
れた減速レートに従ってインバータのスロー停止機能に
より電源ポンプが徐々に減速停止され、交流主電源の遮
断時には電源切換スイッチがＯＮとなって直流補助電源
が供給されると共に運転指令スイッチがＯＦＦとなり予
め設定された減速レートに従ってインバータのスロー停
止機能により電動ポンプが徐々に減速停止されるよう構
成したことを特徴とする、電動ポンプのウォータハンマ
防止装置。An inverter device includes a converter unit and a smoothing capacitor for generating a DC power supply by turning on an AC main power supply, and an inverter unit for generating an AC waveform when an operation command switch is turned on. In the electric pump driven by the waveform, a DC auxiliary power supply circuit that branches from the AC main power supply and is stored in the storage power supply through the charging unit and reaches the inverter unit through the power supply changeover switch is provided. During the operation of the electric pump, the power supply switch is in the OFF state and the DC auxiliary power is not supplied to the electric pump, and the power supply pump is gradually turned on by the inverter's slow stop function according to the preset deceleration rate by turning off the operation command switch. When the AC main power supply is cut off, the power supply switch is turned on and the DC auxiliary power is supplied. A water hammer prevention device for an electric pump, wherein the operation command switch is turned off and the electric pump is gradually decelerated and stopped by a slow stop function of the inverter according to a preset deceleration rate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000218546A JP2002031063A (en) | 2000-07-19 | 2000-07-19 | Water hammering preventing device for motor-driven pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000218546A JP2002031063A (en) | 2000-07-19 | 2000-07-19 | Water hammering preventing device for motor-driven pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002031063A true JP2002031063A (en) | 2002-01-31 |
Family
ID=18713474
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000218546A Pending JP2002031063A (en) | 2000-07-19 | 2000-07-19 | Water hammering preventing device for motor-driven pump |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002031063A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015177603A (en) * | 2014-03-13 | 2015-10-05 | 株式会社東芝 | Inverter apparatus for driving motor |
| CN112628128A (en) * | 2020-12-02 | 2021-04-09 | 上海威派格智慧水务股份有限公司 | Water hammer prevention control method and system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04131150U (en) * | 1991-05-21 | 1992-12-02 | 株式会社三陽電機製作所 | Uninterruptible power system |
-
2000
- 2000-07-19 JP JP2000218546A patent/JP2002031063A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04131150U (en) * | 1991-05-21 | 1992-12-02 | 株式会社三陽電機製作所 | Uninterruptible power system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015177603A (en) * | 2014-03-13 | 2015-10-05 | 株式会社東芝 | Inverter apparatus for driving motor |
| CN112628128A (en) * | 2020-12-02 | 2021-04-09 | 上海威派格智慧水务股份有限公司 | Water hammer prevention control method and system |
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