JP5249704B2 - Electromagnetic operating mechanism drive circuit - Google Patents

Electromagnetic operating mechanism drive circuit Download PDF

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JP5249704B2
JP5249704B2 JP2008262446A JP2008262446A JP5249704B2 JP 5249704 B2 JP5249704 B2 JP 5249704B2 JP 2008262446 A JP2008262446 A JP 2008262446A JP 2008262446 A JP2008262446 A JP 2008262446A JP 5249704 B2 JP5249704 B2 JP 5249704B2
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怜 永安
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Mitsubishi Electric Corp
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Description

この発明は、例えば真空遮断器の真空バルブ等を開閉操作する電磁操作機構の駆動回路の改良に関する。   The present invention relates to an improvement of a drive circuit of an electromagnetic operation mechanism that opens and closes a vacuum valve of a vacuum circuit breaker, for example.

従来の真空遮断器の真空バルブを開閉操作する電磁操作機構の駆動回路は、例えば断面が角形で棒状の可動鉄心の両端部に配置された閉極用及び開極用のコイルに通電することにより可動鉄心を往復駆動して可動鉄心に連結された真空バルブの開閉接点を開閉操作している。主開閉接点の閉極は、閉極用のコイルを放電スイッチを介して充電されたコンデンサに接続し、放電スイッチを閉じることにより行い、閉極が完了すれば放電スイッチを開路して閉極用のコイルに流れていた電流を遮断する。このときに発生するサージ電圧を抑制するために、閉極用のコイルに並列にダイオードを接続し、投入完了後すなわち主開閉接点の閉路完了後閉極用のコイルに流れていた電流を遮断するときそれまで閉極用のコイルに流れていた電流を閉極用のコイルとダイオードとによるループ回路に流すようにされている（例えば、特許文献１参照）。   The drive circuit of the electromagnetic operation mechanism that opens and closes the vacuum valve of the conventional vacuum circuit breaker is, for example, by energizing the coil for closing and opening disposed at both ends of the rod-shaped movable iron core having a square cross section. The movable iron core is driven back and forth to open and close the open / close contact of the vacuum valve connected to the movable iron core. The main switching contact is closed by connecting a closing coil to a charged capacitor via a discharge switch and closing the discharge switch. When the closing is complete, the discharge switch is opened to close Cut off the current that was flowing in the coil. In order to suppress the surge voltage generated at this time, a diode is connected in parallel to the closing coil to cut off the current flowing in the closing coil after completion of closing, that is, after completion of closing of the main switching contact. In some cases, the current that has been flowing through the closing coil is passed through a loop circuit that includes a closing coil and a diode (see, for example, Patent Document 1).

特開２００２−２１６５９４号公報（段落番号００２０及び図１）JP 2002-216594 A (paragraph number 0020 and FIG. 1)

ところで、可動鉄心に対し、閉極用と開極用との２つのコイルを設け、それぞれのコイルに上記のようなダイオードを並列に接続した場合、一方のコイルへ電流を流した際に、もう一方の電流を流していないコイルに誘導電圧が発生する。このため、その誘導電圧によりコイルとダイオードとのループ回路に電流が流れ、閉極時あるいは開極時すなわちコイルを励磁するときにコンデンサからコイルへのエネルギー供給において電力損失が生じる。   By the way, when two coils for closing and opening are provided for the movable iron core, and the above diodes are connected in parallel to each of the coils, when the current is supplied to one coil, An induced voltage is generated in the coil that is not carrying one current. For this reason, current flows in the loop circuit of the coil and diode due to the induced voltage, and power loss occurs in energy supply from the capacitor to the coil at the time of closing or opening, that is, when exciting the coil.

この発明は、上記のような問題点を解決するためになされたものであり、コイルを励磁するときの電力損失を低減できる電磁操作機構の駆動回路を得ることを目的とする。   The present invention has been made to solve the above-described problems, and an object thereof is to obtain a drive circuit for an electromagnetic operation mechanism that can reduce power loss when exciting a coil.

この発明に係る電磁操作機構の駆動回路は、
駆動対象物に連結される可動鉄心並びに可動鉄心を駆動する第１及び第２のコイルを有する電磁操作機構の駆動回路であって、第１及び第２のコイルをそれぞれ直流電源に接続する第１及び第２の開閉スイッチと、第１の並列接続用スイッチと第１の抵抗とが直列に接続された第１の直列回路が第１のコイルに並列に接続された第１の過電圧抑制回路と、第２の並列接続用スイッチと第２の抵抗とが直列に接続された第２の直列回路が第２のコイルに並列に接続された第２の過電圧抑制回路とを備え、
第１の開閉スイッチを閉路して第１のコイルを励磁することにより可動鉄心を第１の位置に駆動し、第２の開閉スイッチを閉路して第２のコイルを励磁することにより可動鉄心を第２の位置に駆動し、
第１の開閉スイッチが閉路されるとき第２の並列接続用スイッチが開路されており、
第１の並列接続用スイッチは、第１の開閉スイッチの閉路後第１の所定時間後に閉路するとともに第１の開閉スイッチの開路後第２の所定時間後に開路し、
第２の開閉スイッチが閉路されるとき第１の並列接続用スイッチが開路されており、
第２の並列接続用スイッチは、第２の開閉スイッチの閉路後第３の所定時間後に閉路するとともに第２の開閉スイッチの開路後第４の所定時間後に開路するものである。 The drive circuit of the electromagnetic operating mechanism according to the present invention is as follows:
A drive circuit for an electromagnetic operating mechanism having a movable iron core coupled to a driving object and first and second coils for driving the movable iron core, wherein the first and second coils are respectively connected to a DC power source. And a first overvoltage suppressing circuit in which a first series circuit in which a first open / close switch, a first parallel connection switch, and a first resistor are connected in series is connected in parallel to the first coil; A second overvoltage suppressing circuit in which a second series circuit in which a second switch for parallel connection and a second resistor are connected in series is connected in parallel to the second coil;
The movable iron core is driven to the first position by closing the first open / close switch and exciting the first coil, and the movable iron core is excited by closing the second open / close switch and exciting the second coil. Drive to the second position,
When the first open / close switch is closed, the second parallel connection switch is open;
The first parallel connection switch is closed after a first predetermined time after the first opening / closing switch is closed and opened after a second predetermined time after the opening of the first opening / closing switch,
When the second open / close switch is closed, the first parallel connection switch is open ;
The second parallel connection switch is closed after a third predetermined time after the second open / close switch is closed and opened after a fourth predetermined time after the second open / close switch is opened.

この発明は、駆動対象物に連結される可動鉄心並びに可動鉄心を駆動する第１及び第２のコイルを有する電磁操作機構の駆動回路であって、第１及び第２のコイルをそれぞれ直流電源に接続する第１及び第２の開閉スイッチと、第１の並列接続用スイッチと第１の抵抗とが直列に接続された第１の直列回路が第１のコイルに並列に接続された第１の過電圧抑制回路と、第２の並列接続用スイッチと第２の抵抗とが直列に接続された第２の直列回路が第２のコイルに並列に接続された第２の過電圧抑制回路とを備え、
第１の開閉スイッチを閉路して第１のコイルを励磁することにより可動鉄心を第１の位置に駆動し、第２の開閉スイッチを閉路して第２のコイルを励磁することにより可動鉄心を第２の位置に駆動し、
第１の開閉スイッチが閉路されるとき第２の並列接続用スイッチが開路されており、
第１の並列接続用スイッチは、第１の開閉スイッチの閉路後第１の所定時間後に閉路するとともに第１の開閉スイッチの開路後第２の所定時間後に開路し、
第２の開閉スイッチが閉路されるとき第１の並列接続用スイッチが開路されており、
第２の並列接続用スイッチは、第２の開閉スイッチの閉路後第３の所定時間後に閉路するとともに第２の開閉スイッチの開路後第４の所定時間後に開路するものであるので、
コイルを励磁するときの電力損失を低減できる。 The present invention is a drive circuit for an electromagnetic operating mechanism having a movable iron core coupled to a driving object and first and second coils for driving the movable iron core, wherein the first and second coils are used as DC power sources, respectively. A first series circuit in which a first and second open / close switch to be connected, a first parallel connection switch, and a first resistor are connected in series is connected in parallel to the first coil. An overvoltage suppression circuit, and a second overvoltage suppression circuit in which a second series circuit in which a second parallel connection switch and a second resistor are connected in series is connected in parallel to the second coil,
The movable iron core is driven to the first position by closing the first open / close switch and exciting the first coil, and the movable iron core is excited by closing the second open / close switch and exciting the second coil. Drive to the second position,
When the first open / close switch is closed, the second parallel connection switch is open;
The first parallel connection switch is closed after a first predetermined time after the first opening / closing switch is closed and opened after a second predetermined time after the opening of the first opening / closing switch,
When the second open / close switch is closed, the first parallel connection switch is open ;
Since the second parallel connection switch is closed after the third predetermined time after the second opening / closing switch is closed and opened after the fourth predetermined time after the opening of the second opening / closing switch ,
Power loss when exciting the coil can be reduced.

実施の形態１．
図１及び図２は、この発明の実施の形態１を示す電磁操作機構の駆動回路を示すものであり、図１は電磁操作機構の駆動回路の構成を示す回路図、図２は動作を説明するためのタイミングチャートである。図１において、電磁操作機構は、可動鉄心と第１及び第２のコイルとしての閉極用及び開極用のコイル５，６を有している。可動鉄心２は、詳細は図示していないが、例えば板状の電磁鋼板が積層されて形成された断面が矩形の棒状のものであり、当該可動鉄心２の両端部に矩形環状の上記コイル５，６が配設されている。そして、コイル５あるいはコイル６に通電することにより可動鉄心２を駆動して図示しない固定鉄心に吸引させることにより、第１の位置と第２の位置との間を往復移動させ、可動鉄心２に連結された操作対象物を駆動する。操作対象物は、例えば真空遮断器の真空バルブの可動導体に固着された可動接点であり、可動導体を往復駆動することにより真空バルブを開閉する。なお、閉極用及び開極用のコイル５，６間には、かなり大きな相互インダクタンスが存在する。 Embodiment 1 FIG.
1 and 2 show a drive circuit of an electromagnetic operation mechanism according to Embodiment 1 of the present invention. FIG. 1 is a circuit diagram showing the configuration of the drive circuit of the electromagnetic operation mechanism, and FIG. 2 explains the operation. It is a timing chart for doing. In FIG. 1, the electromagnetic operating mechanism has a movable iron core and coils 5 and 6 for closing and opening as first and second coils. Although the details of the movable iron core 2 are not shown, for example, a rectangular bar-shaped cross section formed by laminating plate-shaped electromagnetic steel plates is formed, and the rectangular annular coil 5 is formed at both ends of the movable iron core 2. , 6 are arranged. Then, by energizing the coil 5 or the coil 6 to drive the movable iron core 2 and attract it to a fixed iron core (not shown), the movable iron core 2 is moved back and forth between the first position and the second position. Drive the connected operation objects. The operation target is, for example, a movable contact fixed to a movable conductor of a vacuum valve of a vacuum circuit breaker, and opens and closes the vacuum valve by reciprocating the movable conductor. There is a considerably large mutual inductance between the closing and opening coils 5 and 6.

閉極用のコイル５は、ダイオード１３及び第１の開閉スイッチとしてのスイッチ１４を介して、直流電源としてのコンデンサ１１に接続されている。ダイオード１３は、スイッチ１４をオン状態としたときにコイル５を流れる電流の方向が逆方向になることがないようするためのものである。ダイオード１６と抵抗１７とスイッチ１８とが直列に接続された直列回路１９が、閉極用のコイル５と並列に接続されている。なお、ダイオード１６がこの発明における第１の一方向導通装置であり、抵抗１７が第１の抵抗であり、スイッチ１８が第１の並列接続用スイッチであり、直列回路１９が第１の直列回路及び第１の過電圧抑制回路である。以上のコンデンサ１１、ダイオード１３、スイッチ１４、及び直列回路１９により、閉極側の駆動回路が構成されている。なお、スイッチ１４とスイッチ１８には電界効果トランジスタ（ＭＯＳＦＥＴ）が用いられている。   The closing coil 5 is connected to a capacitor 11 serving as a DC power source via a diode 13 and a switch 14 serving as a first opening / closing switch. The diode 13 is for preventing the direction of the current flowing through the coil 5 from being reversed when the switch 14 is turned on. A series circuit 19 in which a diode 16, a resistor 17, and a switch 18 are connected in series is connected in parallel with the closing coil 5. The diode 16 is the first one-way conduction device in the present invention, the resistor 17 is the first resistor, the switch 18 is the first parallel connection switch, and the series circuit 19 is the first series circuit. And a first overvoltage suppression circuit. The capacitor 11, the diode 13, the switch 14, and the series circuit 19 constitute a closed-side drive circuit. The switches 14 and 18 are field effect transistors (MOSFETs).

開極用のコイル６は、ダイオード２３及び第２の開閉スイッチとしてのスイッチ２４を介して、直流電源としてのコンデンサ２１に接続されている。ダイオード２３は、スイッチ２４をオン状態としたときにコイル６を流れる電流の方向が逆方向になることがないようするためのものである。ダイオード２６と抵抗２７とスイッチ２８とが直列に接続された直列回路２９が開極用のコイル６と並列に接続されている。なお、ダイオード２６がこの発明における第２の一方向導通装置であり、抵抗２７が第２の抵抗であり、スイッチ２８が第２の並列接続用スイッチであり、直列回路２９が第２の直列回路及び第２の過電圧抑制回路である。以上のコンデンサ２１、ダイオード２３、スイッチ２４、及び直列回路２９により、開極側の駆動回路が構成されている。スイッチ２４とスイッチ２８には電界効果トランジスタ（ＭＯＳＦＥＴ）が用いられている。なお、コンデンサ１１，２１は、図示していない直流の電源から電力の供給を受け、充電される。   The opening coil 6 is connected to a capacitor 21 as a DC power source via a diode 23 and a switch 24 as a second opening / closing switch. The diode 23 is for preventing the direction of the current flowing through the coil 6 from being reversed when the switch 24 is turned on. A series circuit 29 in which a diode 26, a resistor 27, and a switch 28 are connected in series is connected in parallel with the opening coil 6. The diode 26 is the second one-way conduction device in the present invention, the resistor 27 is the second resistor, the switch 28 is the second parallel connection switch, and the series circuit 29 is the second series circuit. And a second overvoltage suppression circuit. The capacitor 21, diode 23, switch 24, and series circuit 29 described above constitute a drive circuit on the opening side. Field effect transistors (MOSFETs) are used for the switches 24 and 28. Capacitors 11 and 21 are charged with power supplied from a DC power source (not shown).

次に、このように構成された駆動回路の動作を、図１及び図２によって説明する。閉極側のコンデンサ１１から閉極用のコイル５に電流を流し図示しない真空バルブを閉極する場合、図２（ａ）〜（ｄ）に示すように、閉極側のスイッチ１４、スイッチ１８、開極側のスイッチ２４及びスイッチ２８はオフ状態にされている。そして、スイッチ１４をオン状態にすると（図２（ａ））、閉極用のコイル５に電流が流れ励磁される。このとき、スイッチ２４及びスイッチ２８がオフ状態であるため（図２（ｄ））、開極用のコイル６に誘導電圧が発生しても、流れる経路が存在しないため、コイル６による電力損失は生じない。スイッチ１８は、スイッチ１４がオン状態になった後すこし遅れて所定時間ｔ１後にオン状態になる（図２（ｂ））。スイッチ１８がスイッチ１４より所定時間ｔ１遅れてオン状態になるのは、スイッチ１８を含む回路の方がスイッチ１４を含む回路よりも時定数が大きいためである。   Next, the operation of the drive circuit configured as described above will be described with reference to FIGS. When a current is passed from the capacitor 11 on the closing side to the closing coil 5 to close the vacuum valve (not shown), as shown in FIGS. 2A to 2D, the switches 14 and 18 on the closing side are provided. The open side switch 24 and the switch 28 are in an OFF state. When the switch 14 is turned on (FIG. 2A), a current flows through the closing coil 5 and is excited. At this time, since the switch 24 and the switch 28 are in an OFF state (FIG. 2D), even if an induced voltage is generated in the opening coil 6, there is no flowing path. Does not occur. The switch 18 is turned on after a predetermined time t1 with a slight delay after the switch 14 is turned on (FIG. 2B). The switch 18 is turned on after the predetermined time t1 from the switch 14 because the circuit including the switch 18 has a larger time constant than the circuit including the switch 14.

そして、スイッチ１８がオン状態になってから所定時間ｔ２後にスイッチ１４がオフ状態となる（図２（ｂ））。スイッチ１４がオフ状態となるときに発生する開閉サージは、ダイオード１３、ダイオード１６、抵抗１７、スイッチ１８、閉極用のコイル５のループ回路により吸収される。ループ回路を流れる電流が減衰して小さくなった時点、すなわちスイッチ１４がオフ状態となったときから所定時間ｔ３後にスイッチ１８がオフ状態になる（図２（ｂ））。   Then, after a predetermined time t2 after the switch 18 is turned on, the switch 14 is turned off (FIG. 2B). The switching surge generated when the switch 14 is turned off is absorbed by the loop circuit of the diode 13, the diode 16, the resistor 17, the switch 18 and the closing coil 5. When the current flowing through the loop circuit decreases and decreases, that is, after the switch 14 is turned off, the switch 18 is turned off after a predetermined time t3 (FIG. 2B).

同様に、開極側のコンデンサ２１から開極用のコイル６に電流を流し図示しない真空バルブを開極する場合、図２（ａ）〜（ｄ）に示すように、スイッチ１４及びスイッチ１８はオフ状態にされている。そして、スイッチ２４をオン状態とすると（図２（ｃ））、開極用のコイル６に電流が流れ励磁される。このとき、スイッチ１４及びスイッチ１８がオフ状態であるため（図２（ｂ））、閉極用のコイル５に誘導電圧が発生したとしても、流れる経路が存在しないため、コイル５による電力損失は生じない。スイッチ２８は、スイッチ２４がオン状態になった後すこし遅れて所定時間ｔ４後にオン状態になる（図２（ｄ））。スイッチ２８がスイッチ２４より所定時間ｔ４遅れてオン状態になるのは、スイッチ２８を含む回路の方がスイッチ２４を含む回路よりも時定数が大きいためである。   Similarly, when a current is passed from the opening-side capacitor 21 to the opening coil 6 to open a vacuum valve (not shown), as shown in FIGS. It is turned off. When the switch 24 is turned on (FIG. 2C), a current flows through the opening coil 6 and is excited. At this time, since the switch 14 and the switch 18 are in an OFF state (FIG. 2B), even if an induced voltage is generated in the closing coil 5, there is no flowing path. Does not occur. The switch 28 is turned on after a predetermined time t4 with a slight delay after the switch 24 is turned on (FIG. 2D). The switch 28 is turned on after a predetermined time t4 from the switch 24 because the circuit including the switch 28 has a larger time constant than the circuit including the switch 24.

そして、スイッチ２８がオン状態になってから所定時間ｔ５後にスイッチ２４がオフ状態となる（図２（ｃ））。スイッチ２４がオフ状態となるときに発生する開閉サージは、ダイオード２３、ダイオード２６、抵抗２７、スイッチ２８、閉極用のコイル６のループ回路により吸収される。ループ回路を流れる電流が減衰して小さくなった時点、すなわちスイッチ２４がオフ状態となったときから所定時間ｔ６後にスイッチ２８がオフ状態になる（図２（ｄ））。   Then, after a predetermined time t5 after the switch 28 is turned on, the switch 24 is turned off (FIG. 2 (c)). The switching surge generated when the switch 24 is turned off is absorbed by the loop circuit of the diode 23, the diode 26, the resistor 27, the switch 28, and the closing coil 6. When the current flowing through the loop circuit decreases and decreases, that is, when the switch 24 is turned off, the switch 28 is turned off after a predetermined time t6 (FIG. 2D).

なお、時間ｔ１〜ｔ６について、一例をあげれば次の通りである。この値は、可動鉄心２が駆動する真空バルブの大きさ等により異なる。
ｔ１：数ｍｓ程度（この発明における第１の所定時間）
ｔ２：５０ｍｓ程度
ｔ３：５０ｍｓ程度（この発明における第２の所定時間）
ｔ４：数ｍｓ程度（この発明における第３の所定時間）
ｔ５：５０ｍｓ程度
ｔ６：１００ｍｓ程度（この発明における第４の所定時間） An example of the times t1 to t6 is as follows. This value varies depending on the size of the vacuum valve driven by the movable iron core 2.
t1: about several ms (first predetermined time in the present invention)
t2: about 50 ms t3: about 50 ms (second predetermined time in the present invention)
t4: about several ms (third predetermined time in the present invention)
t5: about 50 ms t6: about 100 ms (fourth predetermined time in the present invention)

この実施の形態における電磁操作機構の駆動回路は、以上のように構成されているので、相互インダクタンスを有する２つのコイルを駆動する駆動回路において、一方のコイルを励磁する場合に、励磁しない方のコイルを循環する電流回路がないので、コイルを励磁するときの電力損失を低減できる。   Since the drive circuit of the electromagnetic operating mechanism in this embodiment is configured as described above, in the drive circuit that drives two coils having mutual inductance, when one coil is excited, the one that is not excited Since there is no current circuit circulating through the coil, power loss when exciting the coil can be reduced.

実施の形態２．
図３は、この発明の実施の形態２である電磁操作機構の駆動回路の構成を示す回路図である。この実施の形態は、図１の電磁操作機構の駆動回路において、部品を削減して構成を簡易化したものである。すなわち、図１におけるダイオード１３，１６，２３，２６を省いたものである。第１の過電圧抑制回路としての第１の直列回路５９は、抵抗１７とスイッチ１８とが直列に接続されて構成されている。第２の過電圧抑制回路としての第２の直列回路６９は、抵抗２７とスイッチ２８とが直列に接続されて構成されている。このように、ダイオード１３，１６，２３，２６を省いた場合でも、スイッチ１４とスイッチ１８との開閉タイミング及びスイッチ２４とスイッチ２８との開閉タイミングを適切に制御すれば、電力損失の増加を抑制できる。例えば、スイッチ１８がオン状態となるタイミングをスイッチ１４がオフ状態になる直前に設定することにより、第１の直列回路５９すなわち抵抗１７における電力損失を最小限に抑制でき、かつ回路を簡略化できる。スイッチ２４とスイッチ２８との開閉タイミングについても同様である。 Embodiment 2. FIG.
FIG. 3 is a circuit diagram showing the configuration of the drive circuit of the electromagnetic operating mechanism according to the second embodiment of the present invention. In this embodiment, the configuration of the drive circuit of the electromagnetic operation mechanism shown in FIG. 1 is simplified by reducing the number of components. That is, the diodes 13, 16, 23, and 26 in FIG. 1 are omitted. A first series circuit 59 as a first overvoltage suppression circuit is configured by connecting a resistor 17 and a switch 18 in series. The second series circuit 69 as a second overvoltage suppression circuit is configured by connecting a resistor 27 and a switch 28 in series. Thus, even when the diodes 13, 16, 23, and 26 are omitted, an increase in power loss can be suppressed by appropriately controlling the opening / closing timing of the switch 14 and the switch 18 and the opening / closing timing of the switch 24 and the switch 28. it can. For example, by setting the timing at which the switch 18 is turned on immediately before the switch 14 is turned off, the power loss in the first series circuit 59, that is, the resistor 17, can be minimized, and the circuit can be simplified. . The same applies to the opening / closing timing of the switch 24 and the switch 28.

なお、以上の各実施の形態においては、電磁操作機構は真空遮断器の真空バルブの開閉操作に用いる場合について説明したが、これに限られるものではなく、扉の開閉、バルブの開閉その他の操作のためのアクチュエータとして用いられるものであっても、同様の効果を奏する。また、直流電源として充電されたコンデンサを用いるものを示したが、蓄電池や交流を整流して得た直流電源であっても、同様の効果を奏する。   In each of the above embodiments, the electromagnetic operation mechanism has been described for use in opening and closing the vacuum valve of the vacuum circuit breaker. However, the present invention is not limited to this. Even if it is used as an actuator for the above, the same effect is obtained. Moreover, although what used the capacitor | condenser charged as DC power supply was shown, even if it is DC power supply obtained by rectifying a storage battery or alternating current, there exists the same effect.

この発明の実施の形態１である電磁操作機構の駆動回路の構成を示す回路図である。It is a circuit diagram which shows the structure of the drive circuit of the electromagnetic operating mechanism which is Embodiment 1 of this invention. 図１の電磁操作機構の駆動回路の動作を説明するためのタイミングチャートである。It is a timing chart for demonstrating operation | movement of the drive circuit of the electromagnetic operating mechanism of FIG. この発明の他の実施の形態である電磁操作機構の駆動回路の構成を示す回路図である。It is a circuit diagram which shows the structure of the drive circuit of the electromagnetic operating mechanism which is other embodiment of this invention.

符号の説明Explanation of symbols

２ 可動鉄心、５ 開極用のコイル、６ 閉極用のコイル、
１１，２１ コンデンサ、１４，２４ スイッチ、１６，２６ ダイオード、
１７，２７ 抵抗、１８，２８ スイッチ、１９，２９，５９，６９ 直列回路。 2 movable iron core, 5 coil for opening, 6 coil for closing,
11, 21 capacitors, 14, 24 switches, 16, 26 diodes,
17, 27 resistors, 18, 28 switches, 19, 29, 59, 69 series circuit.

Claims (3)

駆動対象物に連結される可動鉄心並びに上記可動鉄心を駆動する第１及び第２のコイルを有する電磁操作機構の駆動回路であって、上記第１及び第２のコイルをそれぞれ直流電源に接続する第１及び第２の開閉スイッチと、第１の並列接続用スイッチと第１の抵抗とが直列に接続された第１の直列回路が上記第１のコイルに並列に接続された第１の過電圧抑制回路と、第２の並列接続用スイッチと第２の抵抗とが直列に接続された第２の直列回路が上記第２のコイルに並列に接続された第２の過電圧抑制回路とを備え、
上記第１の開閉スイッチを閉路して上記第１のコイルを励磁することにより上記可動鉄心を第１の位置に駆動し、上記第２の開閉スイッチを閉路して上記第２のコイルを励磁することにより上記可動鉄心を第２の位置に駆動し、
上記第１の開閉スイッチが閉路されるとき上記第２の並列接続用スイッチが開路されており、
上記第１の並列接続用スイッチは、上記第１の開閉スイッチの閉路後第１の所定時間後に閉路するとともに上記第１の開閉スイッチの開路後第２の所定時間後に開路し、
上記第２の開閉スイッチが閉路されるとき上記第１の並列接続用スイッチが開路されており、
上記第２の並列接続用スイッチは、上記第２の開閉スイッチの閉路後第３の所定時間後に閉路するとともに上記第２の開閉スイッチの開路後第４の所定時間後に開路するものである
電磁操作機構の駆動回路。 A drive circuit for an electromagnetic operating mechanism having a movable iron core coupled to a drive object and first and second coils for driving the movable iron core, wherein the first and second coils are connected to a DC power source, respectively. A first overvoltage in which a first series circuit in which a first and second open / close switch, a first parallel connection switch, and a first resistor are connected in series is connected in parallel to the first coil. A second overvoltage suppression circuit in which a suppression circuit, a second series circuit in which a second parallel connection switch and a second resistor are connected in series are connected in parallel to the second coil;
The first open / close switch is closed to excite the first coil to drive the movable iron core to the first position, and the second open / close switch is closed to excite the second coil. To drive the movable iron core to the second position,
When the first open / close switch is closed, the second parallel connection switch is open;
The first parallel connection switch is closed after a first predetermined time after the first open / close switch is closed and opened after a second predetermined time after the first open / close switch is opened,
When the second open / close switch is closed, the first parallel connection switch is open ;
The second parallel connection switch is closed after a third predetermined time after the second open / close switch is closed, and is opened after a fourth predetermined time after the second open / close switch is opened. /> Drive circuit for electromagnetic operation mechanism. 上記第１の直列回路は、第１の一方向導通装置を有し、上記第１の一方向導通装置と上記第１の並列接続用スイッチと上記第１の抵抗とが直列に接続されたものであって、上記第１の一方向導通装置の極性が上記直流電源の極性と逆極性になるようにして上記第１のコイルに並列に接続されたものであり、
上記第２の直列回路は、第２の一方向導通装置を有し、上記第２の一方向導通装置と上記第２の並列接続用スイッチと上記第２の抵抗とが直列に接続されたものであって、上記第２の一方向導通装置の極性が上記直流電源の極性と逆極性になるようにして上記第２のコイルに並列に接続されたものであることを特徴とする請求項１に記載の電磁操作機構の駆動回路。 The first series circuit includes a first one-way conduction device, and the first one-way conduction device, the first parallel connection switch, and the first resistor are connected in series. And the first one-way conduction device is connected in parallel to the first coil such that the polarity of the first one-way conduction device is opposite to the polarity of the DC power supply,
The second series circuit includes a second one-way conduction device, and the second one-way conduction device, the second parallel connection switch, and the second resistor are connected in series. The second one-way conduction device is connected in parallel to the second coil such that the polarity of the second one-way conduction device is opposite to the polarity of the DC power supply. The drive circuit of the electromagnetic operation mechanism described in 1. 上記直流電源は、それぞれ充電された第１及び第２のコンデンサであることを特徴とする請求項１または請求項２に記載の電磁操作機構の駆動回路。 3. The drive circuit for an electromagnetic operating mechanism according to claim 1, wherein the DC power source is a first capacitor and a second capacitor which are charged, respectively.
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