JPH0650256A - Control method for automatic water feed device - Google Patents
Control method for automatic water feed deviceInfo
- Publication number
- JPH0650256A JPH0650256A JP4205316A JP20531692A JPH0650256A JP H0650256 A JPH0650256 A JP H0650256A JP 4205316 A JP4205316 A JP 4205316A JP 20531692 A JP20531692 A JP 20531692A JP H0650256 A JPH0650256 A JP H0650256A
- Authority
- JP
- Japan
- Prior art keywords
- switch
- electric motor
- automatic water
- signal
- water supply
- 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
Links
Landscapes
- Details Of Reciprocating Pumps (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Protection Of Generators And Motors (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、自動給水装置の制御方
法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of controlling an automatic water supply device.
【０００２】[0002]
【従来の技術】ポンプ駆動用電動機を発停制御するため
に設けられた半導体スイッチを有する自動給水装置にお
いては、ポンプの締切運転または過負荷運転、あるいは
短絡電流などに基づく焼損事故を防止するため、半導体
スイッチが短絡モードで故障した場合には電源から遮断
されるように、通常は電源側主開閉器として電磁接触器
等が設けられている。特に、電動機定格出力が０．７５
ｋＷ以下の自動給水装置においては、このような措置が
法的にも規定されている。2. Description of the Related Art In an automatic water supply apparatus having a semiconductor switch provided for controlling the start and stop of a pump driving electric motor, in order to prevent a burnout accident due to a shutoff operation or an overload operation of the pump or a short circuit current. An electromagnetic contactor or the like is usually provided as a power source side main switch so that the semiconductor switch is disconnected from the power source when the semiconductor switch fails in the short circuit mode. Especially, the motor rated output is 0.75
Such measures are legally prescribed for automatic water supply devices of kW or less.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、例えば
２台のポンプを交互または交互・並列運転するような自
動給水装置（図１参照）においては、主として所要スペ
ースおよびコスト等の点から通常は主開閉器は１個のみ
しか設けられていない。したがって、一方の半導体スイ
ッチが正常であっても、他方が故障すれば電源から遮断
されてしまうため装置が断水状態に陥ってしまう。However, in an automatic water supply system (see FIG. 1) in which, for example, two pumps are operated alternately or alternately / in parallel, the main opening / closing is usually performed mainly in terms of required space and cost. Only one container is provided. Therefore, even if one of the semiconductor switches is normal, if the other fails, the power is cut off from the power source, and the device is put into a water-off state.
【０００４】本発明は上述のような不具合を改善するた
めになされたもので、電動機電流が許容範囲内であれ
ば、半導体スイッチが短絡しても断水されない自動給水
装置の制御方法を提供することを目的とする。The present invention has been made to solve the above-mentioned problems, and provides a control method for an automatic water supply device in which water is not cut off even if a semiconductor switch is short-circuited if the electric motor current is within an allowable range. With the goal.
【０００５】[0005]
【課題を解決するための手段】本発明は、ポンプ駆動用
電動機を発停制御する半導体スイッチおよび、これの１
次側に設けられた主開閉器を有する自動給水装置におい
て、上記半導体スイッチに対するオフ信号送出後の電動
機電流が所定値以上の場合のみ上記主開閉器を遮断する
ことを特徴とするものである。SUMMARY OF THE INVENTION The present invention is a semiconductor switch for controlling the start and stop of a pump driving electric motor, and a semiconductor switch for the same.
An automatic water supply device having a main switch provided on the secondary side is characterized in that the main switch is shut off only when the electric motor current after the OFF signal is sent to the semiconductor switch is a predetermined value or more.
【０００６】[0006]
【作用】上記の構成において、電動機電流が所定値未満
の場合は半導体スイッチが短絡しても主開閉器が遮断さ
れず、引続き給水可能である。In the above structure, when the electric motor current is less than the predetermined value, the main switch is not cut off even if the semiconductor switch is short-circuited, and water can be continuously supplied.
【０００７】[0007]
【実施例】以下、本発明につき図１に示す一実施例を参
照しながら説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an embodiment shown in FIG.
【０００８】図１において、２組のポンプ１，２は電動
機３，４を備え、吸込側は水槽５に導かれるとともに、
吐出側は流量検出部６，７および逆止弁８，９を介して
合流管１０に並列接続されている。上記合流管１０に
は、圧力検出部１１および蓄圧タンク１２が接続されて
いる。上記電動機３，４は、給電回路１３，１４に設け
られた電流検出部１５，１６および半導体スイッチ１
７，１８を介して主開閉器１９に並列接続されている。In FIG. 1, two sets of pumps 1 and 2 are equipped with electric motors 3 and 4, and the suction side is guided to a water tank 5 and
The discharge side is connected in parallel to the merging pipe 10 via the flow rate detecting units 6 and 7 and the check valves 8 and 9. A pressure detector 11 and an accumulator tank 12 are connected to the merging pipe 10. The electric motors 3 and 4 include the current detectors 15 and 16 provided in the power supply circuits 13 and 14 and the semiconductor switch 1.
It is connected in parallel to the main switch 19 via 7, 18.
【０００９】上記主開閉器１９を介して給電される主制
御部２０は、流量検出部６，７および圧力検出部１１の
各出力信号に関連してポンプ１，２を発停制御するため
半導体スイッチ１７，１８にオン・オフ信号を送出する
手段、半導体スイッチ１７，１８にオフ信号を送出した
のち電流検出部１５，１６の出力信号が所定値以上の場
合のみ主開閉器１９を遮断する信号を送出する手段、半
導体スイッチ１７，１８にオフ信号送出後に電流検出部
１５，１６の出力信号が上記所定値より小さく設定され
た他の所定値以上になったときスイッチ短絡警報を送出
する手段ならびに、半導体スイッチ１７，１８にオン信
号送出後に電流検出部１５，１６の出力信号が検出され
ない場合はスイッチ開放警報を送出する手段等を備えて
いる。次に上記実施例の作用を説明する。The main controller 20 supplied with power via the main switch 19 controls the pumps 1 and 2 in response to the output signals of the flow rate detectors 6 and 7 and the pressure detector 11, so that the semiconductors are controlled by a semiconductor. Means for sending an ON / OFF signal to the switches 17 and 18, a signal for sending an OFF signal to the semiconductor switches 17 and 18 and then shutting off the main switch 19 only when the output signals of the current detectors 15 and 16 are above a predetermined value. And a means for sending a switch short-circuit alarm when the output signals of the current detectors 15 and 16 become equal to or more than another predetermined value smaller than the above-mentioned predetermined value after the off signal is sent to the semiconductor switches 17 and 18. The semiconductor switches 17 and 18 are provided with means for sending a switch open alarm when the output signals of the current detectors 15 and 16 are not detected after the ON signals are sent. Next, the operation of the above embodiment will be described.
【００１０】通常は圧力検出部１１からの始動信号に応
じて例えばポンプ１が先に起動されると、その後に流量
検出部６または電流検出部１５からの停止信号に応じて
ポンプ１が停止され、次に圧力検出部１１からの始動信
号が入力されるとポンプ２が起動されることにより交互
運転が行われる。Normally, for example, when the pump 1 is first started in response to a start signal from the pressure detection unit 11, then the pump 1 is stopped in response to a stop signal from the flow rate detection unit 6 or the current detection unit 15. Next, when the start signal is input from the pressure detection unit 11, the pump 2 is started and the alternate operation is performed.
【００１１】あるいは、交互・並列運転モードに設定さ
れている場合は、ポンプ１が運転状態にあるとき電流検
出部１５から並列信号が送出されるとポンプ２が起動さ
れて２台の並列運転になり、この状態において解列信号
が送出されればポンプ１が解列されてポンプ２の単独運
転となる。Alternatively, when the alternate / parallel operation mode is set, when the parallel signal is sent from the current detection section 15 while the pump 1 is in the operating state, the pump 2 is started and the two parallel operations are performed. When the disconnection signal is sent in this state, the pump 1 is disconnected and the pump 2 is operated independently.
【００１２】そして、主制御部２０においては電動機
３，４の定格電流Ｉおよび係数ｋ（ｋ≦１）を用いて主
開閉器１９を遮断すべき電動機電流の最小値ｋＩを演算
しておき、半導体スイッチ１７，１８にオフ信号を送出
したのちに電動機電流ｉが上記最小値ｋＩより小さく設
定された他の所定値以上になったときはスイッチ短絡警
報を送出し、かつｉ≧ｋＩであれば主開閉器１９に遮断
信号を送出するように構成されている。すなわち、ｋＩ
を連続通電が許容される最大値に等しく設定しておけ
ば、電動機３，４はｉ＜ｋＩの領域では焼損事故を生ず
ることな継続運転され、ｉ≧ｋＩになれば主開閉器１９
が遮断されることになる。したがって、半導体スイッチ
１７，１８の短絡が検出されると直ちに停止される従来
例に比較すれば断水の機会が大幅に低減される。Then, the main controller 20 calculates the minimum value kI of the electric motor current for shutting off the main switch 19, using the rated current I of the electric motors 3 and 4 and the coefficient k (k≤1). After the OFF signal is sent to the semiconductor switches 17 and 18, when the electric motor current i becomes equal to or more than another predetermined value smaller than the minimum value kI, a switch short circuit alarm is sent, and if i ≧ kI. It is configured to send a shutoff signal to the main switch 19. That is, kI
Is set to the maximum value that allows continuous energization, the motors 3 and 4 are continuously operated without causing a burnout accident in the region of i <kI, and when i ≧ kI, the main switch 19
Will be shut off. Therefore, as compared with the conventional example in which the semiconductor switches 17 and 18 are stopped immediately when a short circuit is detected, the chance of water interruption is greatly reduced.
【００１３】また、ポンプの停止状態において連続通電
が許容される最大電流値が例えばＩ／２であるならば、
主開閉器１９を遮断すべき電動機電流の最小値をＩ／２
に設定しておくことが最も安全と考えられる。しかし、
ポンプが正常な運転状態にある場合にはポンプケーシン
グおよび電動機等が充分に冷却されるから、通常はｉ≦
Ｉであれば安全であるとも言え、このように設定してお
けば連続運転が許容される電流領域がさらに拡張される
から、断水の機会をさらに少なくし得ることはいうまで
もない。このような場合にはスイッチ短絡警報が送出さ
れる電流値を、例えばＩ／２程度に設定しておくことが
望ましい。If the maximum current value allowed for continuous energization when the pump is stopped is, for example, I / 2,
The minimum value of the electric motor current that should shut off the main switch 19 is I / 2.
It is considered safest to set to. But,
When the pump is in a normal operating state, the pump casing, the electric motor, etc. are sufficiently cooled.
If it is I, it can be said that it is safe, and needless to say, if it is set in this way, the current region in which continuous operation is allowed is further expanded, so that the chance of water interruption can be further reduced. In such a case, it is desirable to set the current value at which the switch short circuit alarm is sent to, for example, about I / 2.
【００１４】さらに、主制御部２０においては、半導体
スイッチ１７，１８に対するオン信号送出後に電動機電
流ｉが検出されない場合、当該半導体スイッチが開放モ
ードで故障したものとしてスイッチ開放警報を送出する
とともに、未故障の半導体スイッチ側のみの単独運転が
行われる。Further, in the main control section 20, when the motor current i is not detected after the ON signal is sent to the semiconductor switches 17 and 18, it is determined that the semiconductor switch has failed in the open mode, and a switch open alarm is sent out. Only the faulty semiconductor switch side is operated independently.
【００１５】上記実施例においては、上記半導体スイッ
チ１７，１８に対するオフ信号送出後の電動機電流ｉが
所定値ｋＩ（例えばｋ＝１または１／２）以上の場合の
み上記主開閉器１９を遮断するようにしたので、半導体
スイッチ１７，１８が短絡しても電動機３，４が直ちに
停止されることがなく、したがって断水の機会が従来よ
りも大幅に低減される。なお、本発明は上記実施例のみ
に限定されるものではなく、本発明の要旨とするところ
の範囲内で種々の変更ないし応用が可能である。In the above embodiment, the main switch 19 is shut off only when the motor current i after the OFF signal is sent to the semiconductor switches 17 and 18 is a predetermined value kI (eg, k = 1 or 1/2) or more. Therefore, even if the semiconductor switches 17 and 18 are short-circuited, the electric motors 3 and 4 are not immediately stopped, and therefore the chance of water cutoff is greatly reduced compared to the conventional case. It should be noted that the present invention is not limited to the above embodiments, and various modifications and applications are possible within the scope of the gist of the present invention.
【００１６】[0016]
【発明の効果】以上説明したように本発明によれば、電
動機電流が許容範囲内であれば、半導体スイッチが短絡
しても断水されない自動給水装置の制御方法を提供する
ことができる。As described above, according to the present invention, it is possible to provide a control method for an automatic water supply device in which water is not cut off even if a semiconductor switch is short-circuited if the electric motor current is within an allowable range.
【図１】本発明の一実施例を示す系統図。FIG. 1 is a system diagram showing an embodiment of the present invention.
１，２…ポンプ、３，４…電動機、１５，１６…電流検
出部、１７，１８…半導体スイッチ、１９…主開閉器、
２０…主制御部。1, 2 ... Pump, 3, 4 ... Electric motor, 15, 16 ... Current detecting part, 17, 18 ... Semiconductor switch, 19 ... Main switch,
20 ... Main control unit.
Claims (3)
体スイッチおよび、これの１次側に設けられた主開閉器
を有する自動給水装置において、上記半導体スイッチに
対するオフ信号送出後の電動機電流が所定値以上の場合
のみ上記主開閉器を遮断することを特徴とする自動給水
装置の制御方法。1. An automatic water supply device having a semiconductor switch for controlling the start and stop of a pump driving electric motor and a main switch provided on the primary side of the semiconductor switch, wherein the electric motor current after the OFF signal is sent to the semiconductor switch is predetermined. A method of controlling an automatic water supply device, characterized in that the main switch is shut off only when the value is equal to or more than a value.
後の電動機電流が上記所定値より小さく設定された他の
所定値以上になったときスイッチ短絡警報を送出するこ
とを特徴とする請求項１の自動給水装置の制御方法。2. A switch short-circuit alarm is sent when the electric motor current after sending an OFF signal to the semiconductor switch becomes equal to or more than another predetermined value set to be smaller than the predetermined value. Control method of water supply device.
後に電動機電流が検出されない場合はスイッチ開放警報
を送出することを特徴とする請求項１または請求項２の
自動給水装置の制御方法。3. The control method for the automatic water supply device according to claim 1 or 2, wherein a switch open alarm is transmitted when the electric motor current is not detected after the ON signal is transmitted to the semiconductor switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20531692A JP3356800B2 (en) | 1992-07-31 | 1992-07-31 | Control method of automatic water supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20531692A JP3356800B2 (en) | 1992-07-31 | 1992-07-31 | Control method of automatic water supply device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0650256A true JPH0650256A (en) | 1994-02-22 |
| JP3356800B2 JP3356800B2 (en) | 2002-12-16 |
Family
ID=16504935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20531692A Expired - Lifetime JP3356800B2 (en) | 1992-07-31 | 1992-07-31 | Control method of automatic water supply device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3356800B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9156905B2 (en) | 2001-10-24 | 2015-10-13 | Vib Vzw | Functional heavy chain antibodies, fragments thereof, library thereof and methods of production thereof |
-
1992
- 1992-07-31 JP JP20531692A patent/JP3356800B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9156905B2 (en) | 2001-10-24 | 2015-10-13 | Vib Vzw | Functional heavy chain antibodies, fragments thereof, library thereof and methods of production thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3356800B2 (en) | 2002-12-16 |
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