JPH06351282A - Controller for canned motor pump - Google Patents

Controller for canned motor pump

Info

Publication number
JPH06351282A
JPH06351282A JP5133253A JP13325393A JPH06351282A JP H06351282 A JPH06351282 A JP H06351282A JP 5133253 A JP5133253 A JP 5133253A JP 13325393 A JP13325393 A JP 13325393A JP H06351282 A JPH06351282 A JP H06351282A
Authority
JP
Japan
Prior art keywords
output
current
pump
canned motor
rotor
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
JP5133253A
Other languages
Japanese (ja)
Other versions
JP2656890B2 (en
Inventor
Kiyotomo Ishita
清倫 井下
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.)
Nidec Advanced Motor Corp
Original Assignee
Nidec Servo 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 Nidec Servo Corp filed Critical Nidec Servo Corp
Priority to JP5133253A priority Critical patent/JP2656890B2/en
Publication of JPH06351282A publication Critical patent/JPH06351282A/en
Application granted granted Critical
Publication of JP2656890B2 publication Critical patent/JP2656890B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/02Stopping of pumps, or operating valves, on occurrence of unwanted conditions
    • F04D15/0209Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid
    • F04D15/0218Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid the condition being a liquid level or a lack of liquid supply
    • F04D15/0236Lack of liquid level being detected by analysing the parameters of the electric drive, e.g. current or power consumption

Abstract

PURPOSE:To control a canned motor pump such that the operation thereof is interrupted before the bearing wears away when hot water can not be supplied sufficiently into the pump chamber. CONSTITUTION:The controller for canned motor pump comprises means 25 for detecting the output current from a drive circuit 27 being fed to the stator winding 6 of a canned motor, a decision circuit 24 including means for generating a reference current and means for comparing the stator winding current with the reference current, and means for stopping the output from the drive circuit 27 based on a command delivered from the decision circuit 27 when the stator winding current is lower than the reference current thus stopping the operation of a pump. Since the output current from the drive circuit 27 is low when hot water is not supplied sufficiently into the pump chamber, abnormal operation due to insufficient lubrication can be prevented by detecting the current.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、特に温水循環ポンプな
どに適するキャンドモ−タポンプの制御装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control system for a canned motor pump, which is particularly suitable for a hot water circulation pump.

【0002】[0002]

【従来の技術】図4および図5により従来技術を説明す
る。図4に従来技術によるキャンドモ−タの一実施例の
断面図を示す。モ−タケ−シング12と、エンドブラケ
ット14と、キャン(缶)11とにより囲まれた固定子
室2に巻線6を巻装した固定子4が設置されている。上
記キャン11は非磁性体で形成され、上記モ−タケ−シ
ング12とエンドブラケット14の内側端面に水密に固
着して取り付けられており、また、内側には回転子室3
が形成されている。回転子室3の中には回転軸9に取り
付けられた永久磁石8を備えた回転子7が設置され、上
記回転軸はモ−タケ−シング12とエンドブラケット1
4に取り付けられた軸受10により支えられている。モ
−タケ−シング12より突出した回転軸9の軸端にはイ
ンペラ15が固着され、さらに該インペラの外周に設け
られたポンプケ−シング13とモ−タケ−シング12に
よりポンプ室1が形成されている。また回転軸9の他端
はエンドブラケット14を貫通して突出し、該軸端には
位置検出用磁石21を取り付けた支持部材20がナット
19で固着されている。また上記位置検出用磁石21を
取り囲んで非磁性体のカバ−18がエンドブラケット1
4の端面に水密に取り付けられて設置され、さらに、該
カバ−18の外周には磁気検出器16が上記位置検出用
磁石21に対向するように設置されている。磁気検出器
16は基板17に電気的に接続している。図5は図4に
示したキャンドモ−タポンプの駆動装置のブロック図で
ある。駆動回路27は回転子7の位置を検出する磁気検
出器16からの信号を受けて、直流電源26から供給さ
れる直流を多相交流に変換する。モ−タの固定子巻線6
に供給された多相交流は固定子4の内面に回転磁界を発
生し、キャン11を隔てて設置された回転子7を駆動
し、さらに回転子7と一体をなすインペラを駆動してポ
ンプとしての機能を果たす。
2. Description of the Related Art A conventional technique will be described with reference to FIGS. FIG. 4 shows a sectional view of an embodiment of a conventional canned motor. A stator 4 having a winding 6 wound around a stator chamber 2 surrounded by a motor casing 12, an end bracket 14, and a can (can) 11 is installed. The can 11 is made of a non-magnetic material, is watertightly attached to the inner ends of the motor casing 12 and the end bracket 14, and is mounted inside the rotor chamber 3.
Are formed. A rotor 7 having a permanent magnet 8 attached to a rotary shaft 9 is installed in the rotor chamber 3, the rotary shaft being a motor casing 12 and an end bracket 1.
It is supported by a bearing 10 mounted on the shaft 4. An impeller 15 is fixed to the shaft end of the rotary shaft 9 protruding from the motor casing 12, and a pump chamber 1 is formed by a pump casing 13 and a motor casing 12 provided on the outer periphery of the impeller. ing. The other end of the rotary shaft 9 projects through the end bracket 14, and a support member 20 to which a position detecting magnet 21 is attached is fixed to the shaft end with a nut 19. Further, the cover 18 made of a non-magnetic material surrounds the position detecting magnet 21 and the end bracket 1
4 is installed in a watertight manner on the end face of No. 4, and a magnetic detector 16 is installed on the outer periphery of the cover 18 so as to face the position detecting magnet 21. The magnetic detector 16 is electrically connected to the substrate 17. FIG. 5 is a block diagram of a drive unit for the canned motor pump shown in FIG. The drive circuit 27 receives a signal from the magnetic detector 16 that detects the position of the rotor 7, and converts the direct current supplied from the direct current power supply 26 into a multi-phase alternating current. Motor stator winding 6
The multi-phase alternating current supplied to generates a rotating magnetic field on the inner surface of the stator 4, drives the rotor 7 installed with the can 11 separated, and further drives the impeller integrated with the rotor 7 to form a pump. Fulfill the function of.

【0003】[0003]

【発明が解決しようとする課題】上記のごとき従来のキ
ャンドモ−タにおいては、軸受10と回転軸9の隙間に
温水が浸透し潤滑の役目を果たすことによって回転子7
が滑らかに回転するものであるが、ポンプ室1内に温水
が十分得られない状態で回転すると潤滑作用が不十分と
なり、軸受10の摩耗が急激に早められ、軸受寿命が短
くなる問題があった。本発明は上記のごとき問題を解決
するためになされたものであり、ポンプ室1内に温水が
十分得られないときは、軸受10が摩耗する前に運転を
停止し、軸受10を保護し、信頼度の高いキャンドモ−
タポンプを提供することを目的とする。
In the conventional canned motor as described above, the hot water permeates into the gap between the bearing 10 and the rotary shaft 9 and plays the role of lubrication, thereby causing the rotor 7 to rotate.
Although it rotates smoothly, there is a problem that if it rotates in a state where sufficient hot water is not obtained in the pump chamber 1, the lubrication action becomes insufficient, the wear of the bearing 10 is rapidly accelerated, and the bearing life is shortened. It was The present invention has been made to solve the above problems, and when hot water is not sufficiently obtained in the pump chamber 1, the operation is stopped before the bearing 10 is worn to protect the bearing 10. Highly reliable candomo
The purpose is to provide a tap pump.

【0004】[0004]

【課題を解決するための手段】上記の目的を達成するた
め本発明においては、特許請求の範囲に記載するように
構成している。すなわち、請求項1に記載された発明の
キャンドモ−タ制御装置は、キャンドモ−タの固定子巻
線に供給される電流を検出する手段と、基準電流を発生
させる手段と、上記検出された固定子巻線電流と基準電
流とを比較する手段と、上記固定子巻線電流が所定値以
下の場合には、ポンプの運転を停止する手段とを具備し
ている。また、請求項2に記載された発明は、上記通電
制御装置によるポンプの運転を停止する手段に関するも
ので、キャンドモ−タポンプの起動と同時に作動を開始
するタイマ−と、該タイマ−出力と上記比較手段の出力
とを入力とするフリップフロップ回路とを具備してい
る。
In order to achieve the above object, the present invention is constructed as described in the claims. That is, the canned motor control device of the invention described in claim 1 is a means for detecting a current supplied to the stator winding of the canned motor, a means for generating a reference current, and the detected fixed current. It has means for comparing the child winding current with a reference current, and means for stopping the operation of the pump when the stator winding current is below a predetermined value. The invention described in claim 2 relates to a means for stopping the operation of the pump by the energization control device, and a timer for starting the operation at the same time as the activation of the canned motor pump, and the output of the timer and the comparison. And a flip-flop circuit that receives the output of the means.

【0005】[0005]

【作用】上述のごときキャンドモ−タにおいては、ポン
プ室に温水が無くなると、モ−タの負荷が小さくなるの
で、モ−タの固定子巻線に供給される電流は通常運転状
態の電流と比較して減少する。本発明においてはこの固
定子巻線の電流を検出して、温水の有無を検出してい
る。電流の減少を検出したときには、ポンプ室内に温水
がない状態、すなわち潤滑作用が不十分の状態と判定し
て、ポンプの運転を停止する。軸受寿命の低下を防ぐこ
とができる。
In the canned motor as described above, the load on the motor is reduced when hot water is removed from the pump chamber. Therefore, the current supplied to the stator winding of the motor is the same as the current in the normal operating state. Decrease in comparison. In the present invention, the presence or absence of hot water is detected by detecting the current in this stator winding. When a decrease in current is detected, it is determined that there is no hot water in the pump chamber, that is, the lubrication action is insufficient, and the pump operation is stopped. It is possible to prevent the bearing life from being shortened.

【0006】[0006]

【実施例】以下本発明を実施例に基づいて説明する。図
1は本発明の一実施例を示すキャンドモ−タポンプの制
御装置のブロック図である。キャンドモ−タポンプの回
転軸に取り付けられた位置検出用磁石21と対向して磁
気検出器16(エンコ−ダ)が装着されており、該磁気
検出器の出力信号は駆動回路27に入力し、ここで、直
流電源26より供給される直流を交流電流に変換する。
交流電流に変換された上記駆動回路27の出力電流は上
記キャンドモ−タの複数個の固定子巻線6に順次、分配
通電されている。また、駆動回路27の出力電流は電流
検出器25により検出され、判定回路24によりモニタ
−されている。すなわち、上記電流検出器25の出力値
は判定回路24において設定値と比較され、検出器25
の出力値が設定値以下のとき、判定回路24から上記駆
動回路27に通電停止指令を出力する。次に本実施例回
路の動作を図2および図3を参照して説明する。図2は
判定回路24の構成を示す回路図である。28は電流検
出器25の出力(a)を整流する絶対値回路で、この絶
対値回路28の出力(b)は第1の比較器29(コンパ
レ−タ)に入力し、基準電圧(h)との大小が比較され
る。基準電圧(h)は基準電源電圧を抵抗R1、R2で分
割して得られている。言うまでもなく第1の比較器29
では電圧の大小が比較されているので、比較すべき電流
は電圧に変換されている。そして図2における基準電圧
(h)の発生回路は特許請求の範囲で記載した基準電流
を発生する手段に相当するものである。この第1の比較
器29の出力(c)は抵抗R3とコンデンサCからなる
フィルタ30により平滑化され、さらにこの平滑化され
た電圧(d)は第2の比較器(コンパレ−タ)31に入
力し、基準電圧(i)との大小が比較される。基準電圧
(i)は基準電源電圧をR4、R5で分割して得られてい
る。第2の比較器31の出力(e)はロジックレベルの
出力を持ち、フリップフロップ回路33のデ−タ入力に
入る。また、タイマ−32の出力(f)はフリップフロ
ップ回路33のクロック入力に入り、このクロックによ
りフリップフロップ回路の出力が制御される。図3は本
実施例の動作を示すタイムチャ−トで、温水があると
き、および温水がないときの回路各部における出力波形
を示す。電流検出器25は固定子巻線6の電流Iaを検
出し、出力には図の(a)に示すごとき交流波形の電流
が流れている。電流値は温水の有無により、すなわちモ
−タ負荷の大小により、大きさが異なり、本発明は、こ
の負荷電流の大小と温水の有無の関係に着目したもので
ある。絶対値回路28ではこの交流を絶対値に変換し、
絶対値に比例する電圧(b)を出力している。第1の比
較器29ではこの絶対値回路28の出力電圧(b)と基
準電圧(h)を比較し、基準電圧(h)よりも絶対値回
路28の出力電圧(b)が大きいときにのみハイレベル
電圧を出力する。図の(c)が第1比較器の出力波形を
示す。温水があるときは方形波電圧が出力され、温水が
ないときは出力電圧は零である。基準電圧(h)は前述
のごとく抵抗R1、R2によって任意に設定される。第1
の比較器29の出力(c)はフィルタ−30で平滑さ
れ、図の(d)に示す出力が得られる。さらに第2の比
較器31では基準電圧(i)と比較され、ロジックレベ
ルに変換された電圧(e)が出力される。図の(e)で
は温水があるときはハイレベル電圧が出力され、温水が
ないときロウレベル電圧が出力されている。すでに述べ
たごとくフィルタ−30は抵抗R3とコンデンサ−Cに
よって構成され、また基準電圧(i)はR4、R5によっ
て任意に設定されている。一方タイマ−32はキャンド
モ−タと並列に電源に接続され、スタ−トしてから所定
の時間経過した後、例えば軸受10が温水無しで使用し
ても急激に摩耗しない程度の数分間が経過した後、パル
ス出力(f)を発生し、フリップフロップ回路33のク
ロック入力に入力する。上記フリップフロップ回路33
はこのパルス(f)に同期して、第2の比較器31の出
力電圧(e)を取り込み、出力する。(e)がハイレベ
ル電圧のときはハイレベル電圧(g)を出力して、駆動
回路27の動作を継続し、(e)がロウレベル電圧のと
きは駆動回路27に通電停止の指令(g)を発生する。
本実施例では、巻線6の電流Iaを検出しているが、こ
の代わりに、直流電源26から駆動回路27に流入する
直流電流Ibを検出する構成でもよい。
EXAMPLES The present invention will be described below based on examples. FIG. 1 is a block diagram of a control unit for a canned motor pump showing an embodiment of the present invention. A magnetic detector 16 (encoder) is mounted so as to face the position detecting magnet 21 attached to the rotary shaft of the canned motor pump, and the output signal of the magnetic detector is input to the drive circuit 27. Then, the direct current supplied from the direct current power supply 26 is converted into an alternating current.
The output current of the drive circuit 27 converted into an alternating current is sequentially distributed and energized to the plurality of stator windings 6 of the canned motor. The output current of the drive circuit 27 is detected by the current detector 25 and monitored by the determination circuit 24. That is, the output value of the current detector 25 is compared with the set value in the determination circuit 24, and the detector 25
When the output value of is less than or equal to the set value, the determination circuit 24 outputs an energization stop command to the drive circuit 27. Next, the operation of the circuit of this embodiment will be described with reference to FIGS. FIG. 2 is a circuit diagram showing the configuration of the determination circuit 24. Reference numeral 28 denotes an absolute value circuit for rectifying the output (a) of the current detector 25. The output (b) of this absolute value circuit 28 is input to the first comparator 29 (comparator) and the reference voltage (h) is supplied. The size of and is compared. The reference voltage (h) is obtained by dividing the reference power supply voltage by the resistors R 1 and R 2 . Needless to say, the first comparator 29
Since the magnitudes of the voltages are compared with each other, the current to be compared is converted into a voltage. The circuit for generating the reference voltage (h) in FIG. 2 corresponds to the means for generating the reference current described in the claims. The output (c) of the first comparator 29 is smoothed by a filter 30 composed of a resistor R 3 and a capacitor C, and the smoothed voltage (d) is supplied to a second comparator (comparator) 31. And the magnitude of the reference voltage (i) is compared. The reference voltage (i) is obtained by dividing the reference power supply voltage by R 4 and R 5 . The output (e) of the second comparator 31 has a logic level output and enters the data input of the flip-flop circuit 33. The output (f) of the timer-32 enters the clock input of the flip-flop circuit 33, and the output of the flip-flop circuit is controlled by this clock. FIG. 3 is a time chart showing the operation of this embodiment, showing output waveforms at various parts of the circuit when hot water is present and when hot water is not present. The current detector 25 detects the current Ia of the stator winding 6, and the output has an alternating current waveform as shown in FIG. The current value varies depending on the presence or absence of hot water, that is, the magnitude of the motor load, and the present invention focuses on the relationship between the magnitude of the load current and the presence or absence of hot water. The absolute value circuit 28 converts this alternating current into an absolute value,
The voltage (b) proportional to the absolute value is output. The first comparator 29 compares the output voltage (b) of the absolute value circuit 28 with the reference voltage (h), and only when the output voltage (b) of the absolute value circuit 28 is larger than the reference voltage (h). Output high level voltage. (C) of the figure shows the output waveform of the first comparator. When there is warm water, a square wave voltage is output, and when there is no warm water, the output voltage is zero. The reference voltage (h) is arbitrarily set by the resistors R 1 and R 2 as described above. First
The output (c) of the comparator 29 is smoothed by the filter 30 to obtain the output shown in (d) of the figure. Further, the second comparator 31 compares with the reference voltage (i) and outputs the voltage (e) converted into the logic level. In (e) of the figure, a high level voltage is output when there is hot water, and a low level voltage is output when there is no hot water. As described above, the filter 30 is composed of the resistor R 3 and the capacitor C, and the reference voltage (i) is arbitrarily set by R 4 and R 5 . On the other hand, the timer 32 is connected to the power source in parallel with the canned motor, and after a predetermined time has passed after the start, for example, a few minutes have passed until the bearing 10 does not wear rapidly even if it is used without hot water. After that, a pulse output (f) is generated and input to the clock input of the flip-flop circuit 33. The flip-flop circuit 33
Takes in and outputs the output voltage (e) of the second comparator 31 in synchronization with this pulse (f). When (e) is a high level voltage, the high level voltage (g) is output to continue the operation of the drive circuit 27, and when (e) is a low level voltage, the drive circuit 27 is commanded to stop energization (g). To occur.
In the present embodiment, the current Ia of the winding 6 is detected, but instead of this, a configuration may be adopted in which the DC current Ib flowing from the DC power supply 26 into the drive circuit 27 is detected.

【0007】[0007]

【発明の効果】以上説明したように、この発明によれ
ば、キャンドモ−タポンプの制御装置はモ−タの負荷電
流を検出して基準値と比較し、基準値以下の状態が所定
の時間経過したときはポンプ室1に温水がない状態と判
断し、ポンプの運転を停止する。そのため、軸受10が
摩耗する前にポンプの運転は停止され、該軸受は保護さ
れるので、キャンドモ−タポンプの信頼度を高めること
ができるという効果がある。
As described above, according to the present invention, the control device of the canned motor pump detects the load current of the motor and compares it with the reference value, and the state below the reference value has passed the predetermined time. If so, it is determined that there is no hot water in the pump chamber 1, and the pump operation is stopped. Therefore, the pump operation is stopped before the bearing 10 is worn, and the bearing is protected, so that the reliability of the canned motor pump can be improved.

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

【図1】本発明によるキャンドモ−タポンプの制御装置
の一実施例のブロック図。
FIG. 1 is a block diagram of an embodiment of a control device for a canned motor pump according to the present invention.

【図2】本発明によるキャンドモ−タポンプの制御装置
の判定回路の一実施例の回路図。
FIG. 2 is a circuit diagram of an embodiment of a determination circuit of a control device for a canned motor pump according to the present invention.

【図3】本発明によるキャンドモ−タポンプの制御回路
の動作を示すタイムチャ−ト。
FIG. 3 is a time chart showing the operation of the control circuit of the canned motor pump according to the present invention.

【図4】従来技術になるキャンドモ−タポンプの構造を
示す断面図。
FIG. 4 is a sectional view showing the structure of a conventional canned motor pump.

【図5】従来技術になるキャンドモ−タポンプの駆動回
路のブロック図。
FIG. 5 is a block diagram of a drive circuit for a conventional canned motor pump.

【符号の説明】[Explanation of symbols]

1…ポンプ室 12…モ−タケ−シング 2…固定子室 13…ポンプケ−シング 3…回転子室 14…エンドブラケット 4…固定子 15…インペラ 5…鉄心 16…磁気検出器 6…固定子巻線 17…基板 7…回転子 18…非磁性体材料で形成さ
れたカバ− 8…永久磁石 19…ナット 9…回転軸 20…支持部材 10…軸受 21…位置検出用磁石 11…キャン 24…判定回路 29…第1の比較器 25…電流検出器 30…フィルタ− 26…直流電源 31…第2の比較器 27…駆動回路 32…タイマ− 28…絶対値回路 33…フリップフロップ回路
DESCRIPTION OF SYMBOLS 1 ... Pump chamber 12 ... Motor casing 2 ... Stator chamber 13 ... Pump casing 3 ... Rotor chamber 14 ... End bracket 4 ... Stator 15 ... Impeller 5 ... Iron core 16 ... Magnetic detector 6 ... Stator winding Wire 17 ... Substrate 7 ... Rotor 18 ... Cover 8 made of non-magnetic material 8 ... Permanent magnet 19 ... Nut 9 ... Rotating shaft 20 ... Support member 10 ... Bearing 21 ... Position detecting magnet 11 ... Can 24 ... Judgment Circuit 29 ... 1st comparator 25 ... Current detector 30 ... Filter-26 ... DC power supply 31 ... Second comparator 27 ... Drive circuit 32 ... Timer-28 ... Absolute value circuit 33 ... Flip-flop circuit

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】駆動巻線を巻装した固定子をモ−タケ−シ
ングと、エンドブラケットとにより囲まれた固定子室に
配置し、 上記固定子の内周には、非磁性体のキャンを上記モ−タ
ケ−シングとエンドブラケットの内側の端面に水密に固
着して設置し、 上記非磁性体のキャンはその内側に回転子室を形成し、
該回転子室には上記モ−タケ−シングとエンドブラケッ
トに設けた軸受により支承された回転軸および該回転軸
に固着された永久磁石を備えた回転子を配置し、 上記回転軸の一端は上記モ−タケ−シング側に突出し、
突出部にインペラを取り付け、該インペラの外周にポン
プケ−シングを設け、 上記回転軸の他端は上記エンドブラケット側に突出し、
突出部に回転子の位置検出装置を設け、 該位置検出装置の出力で制御される通電制御装置を介し
て上記駆動巻線の通電を制御する構成のキャンドモ−タ
ポンプの制御装置において、 通電制御装置の出力電流を検出する手段と、 基準電流を発生させる手段と、 上記検出した出力電流と上記基準電流とを比較する手段
と、 検出した電流が基準電流より小さいときに上記通電制御
装置の出力を停止せしめる制御手段と、 を設けたことを特徴とするキャンドモ−タポンプの制御
装置。
1. A stator around which a drive winding is wound is arranged in a stator chamber surrounded by a motor casing and an end bracket, and a non-magnetic material can is disposed inside the stator. Is watertightly attached to the inner surface of the motor casing and the end bracket, and the can of the non-magnetic material forms a rotor chamber inside thereof.
A rotor having a rotary shaft supported by a bearing provided on the motor casing and the end bracket and a rotor having a permanent magnet fixed to the rotary shaft is arranged in the rotor chamber, and one end of the rotary shaft is Projected to the above-mentioned motor casing side,
An impeller is attached to the projecting portion, a pump casing is provided on the outer periphery of the impeller, and the other end of the rotating shaft projects toward the end bracket side.
A controller for a canned motor pump having a configuration in which a rotor position detecting device is provided on a protrusion and the energization of the drive winding is controlled via an energizing controller controlled by the output of the position detecting device. Means for detecting the output current, a means for generating a reference current, a means for comparing the detected output current with the reference current, and an output of the energization control device when the detected current is smaller than the reference current. A control device for a canned motor pump, which is provided with a control means for stopping.
【請求項2】キャンドモ−タポンプの起動と同時に作動
を開始するタイマと、 該タイマの出力をクロックとして入力し、上記比較手段
の出力をデ−タとして入力するフリップフロップ回路と
を設け、 上記フリップフロップ回路の出力を、上記通電制御装置
を停止せしめる制御手段に入力するようにしたことを特
徴とする請求項1に記載のキャンドモ−タポンプの制御
装置
2. A flip-flop circuit for starting the operation of the canned motor pump at the same time when it is activated, and a flip-flop circuit for inputting the output of the timer as a clock and for inputting the output of the comparison means as data. 2. The control device for a canned motor pump according to claim 1, wherein the output of the pump circuit is input to control means for stopping the energization control device.
JP5133253A 1993-06-03 1993-06-03 Control device for canned motor pump Expired - Fee Related JP2656890B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5133253A JP2656890B2 (en) 1993-06-03 1993-06-03 Control device for canned motor pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5133253A JP2656890B2 (en) 1993-06-03 1993-06-03 Control device for canned motor pump

Publications (2)

Publication Number Publication Date
JPH06351282A true JPH06351282A (en) 1994-12-22
JP2656890B2 JP2656890B2 (en) 1997-09-24

Family

ID=15100293

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5133253A Expired - Fee Related JP2656890B2 (en) 1993-06-03 1993-06-03 Control device for canned motor pump

Country Status (1)

Country Link
JP (1) JP2656890B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19860828A1 (en) * 1998-10-16 2000-07-13 Samsung Electronics Co Ltd Ion implantation equipment used for semiconductor manufacture, includes main controller which detects current level to generate control signal based on which ion implantation turbine pump operation is controlled
US20110150628A1 (en) * 2008-08-13 2011-06-23 Norbert Wagner Fluid energy machine
JP2015202017A (en) * 2014-04-10 2015-11-12 日産自動車株式会社 waveform comparator
CN114665445A (en) * 2022-05-20 2022-06-24 上海华建电力设备股份有限公司 Motor monitoring device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4838503A (en) * 1971-09-20 1973-06-06
JPH02161196A (en) * 1988-12-12 1990-06-21 Aisan Ind Co Ltd Motor-driven type fuel pump

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4838503A (en) * 1971-09-20 1973-06-06
JPH02161196A (en) * 1988-12-12 1990-06-21 Aisan Ind Co Ltd Motor-driven type fuel pump

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19860828A1 (en) * 1998-10-16 2000-07-13 Samsung Electronics Co Ltd Ion implantation equipment used for semiconductor manufacture, includes main controller which detects current level to generate control signal based on which ion implantation turbine pump operation is controlled
DE19860828C2 (en) * 1998-10-16 2001-09-20 Samsung Electronics Co Ltd Ion implantation system and method for monitoring an ion implantation operation
US20110150628A1 (en) * 2008-08-13 2011-06-23 Norbert Wagner Fluid energy machine
JP2015202017A (en) * 2014-04-10 2015-11-12 日産自動車株式会社 waveform comparator
CN114665445A (en) * 2022-05-20 2022-06-24 上海华建电力设备股份有限公司 Motor monitoring device
CN114665445B (en) * 2022-05-20 2022-08-16 上海华建电力设备股份有限公司 Motor monitoring device

Also Published As

Publication number Publication date
JP2656890B2 (en) 1997-09-24

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