JPS59202613A - Alternative current electromagnet device - Google Patents

Abstract

PURPOSE:To make it titled device smaller in size as well as to contrive improvement in reliability by a method wherein a control coil is divided into a plurality of parts, said plurality of control coils are connected in parallel when a core is attracted, an attraction current is applied on the core, and the coils are series-connected after the core has been attracted, thereby enabling to reduce loss. CONSTITUTION:Both ends of a control circuit are connected to the DC terminal of a full wave rectifier 3 by connecting the control coil 1a, which is one of the splitted-in- two control coils 1a and 1b, to the other control coil 1b in series. A normally closed contact point 6a is connected between the connection point of the control coil 1a and the diode 7, and the full wave rectifier of the control coil 1b, and a normally closed contact point 6b is connected between the connection point of the DC terminal of the full wave rectifier 3 and the control coil 1a and the connection point of the diode 7 and the control coil 1b. When a DC current is applied to the two control coils 1a and 1b, a movable core is attracted to a fixed core. The two normally closed contact points 6a and 6b are opened when the movable coil is attracted or immediately before it is attracted, and two control coils 1a and 1b are series-connected through the intermediary of the diode 7.

Description

【発明の詳細な説明】 〔発明の属する技術分野〕 本発明は、単相交流電源を制御電源とする電磁接触器等
に用いられる交流電磁石装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical field to which the invention pertains] The present invention relates to an AC electromagnet device used in an electromagnetic contactor or the like using a single-phase AC power source as a control power source.

〔従来技術とその問題点〕[Prior art and its problems]

一般に電磁接触器等に用いられる電磁石装置は、操作コ
イルを巻いた固定鉄心とこの固定鉄心に空隙を介して相
対する可動鉄心を備え、操作コイルに通電すると可動鉄
心がほぼ空隙長だけ固定鉄心に吸引され、このときの可
動鉄心の移動ストロークが接点の動作ストロークとして
利用される。ところでこの電磁石装置が普通に得られる
単相交流電源で操作されるとき、操作コイルに交流電流
が流れると鉄心中の交流磁束にょる鉄損が発生するので
これを軽減するために電気鉄板を積層した鉄心が用いら
れているが、この鉄損を皆無にすることはできない。ま
た、電流零点における鉄心の吸引力を維持し、うなシを
小さくするためにくま取υコイルが用いられているが、
この損失も無視できないという欠点があり、かつ積層積
石、くま取りコイルなどその材料費や工数がかかるとい
う欠点がある。さらに電磁石装置は、制御電源が交流。Generally, an electromagnetic device used in an electromagnetic contactor, etc. has a fixed core wrapped around an operating coil and a movable core that faces the fixed core with an air gap between them.When the operating coil is energized, the movable core connects to the fixed core by approximately the length of the gap. The moving stroke of the movable core at this time is used as the operating stroke of the contact. By the way, when this electromagnet device is operated with a commonly available single-phase AC power source, when AC current flows through the operating coil, iron loss occurs due to AC magnetic flux in the iron core, so electric iron plates are laminated to reduce this. However, this iron loss cannot be completely eliminated. In addition, in order to maintain the attractive force of the iron core at the current zero point and to reduce the undulation, a shank υ coil is used.
There is a drawback that this loss cannot be ignored, and there is also a drawback that the materials and man-hours required for the use of laminated stones, shaded coils, etc. are high. Furthermore, the control power source for electromagnet devices is AC.

直流にかかわらず固定鉄心と可動鉄心との間に常時大き
な空隙があシ、かつ可動鉄心は普通駆動すべき負荷を負
うから、固定鉄心がこれを吸引するときは、大きなアン
ペアターンを必要とし、操作コイルに大電流を流さなけ
ればならない。しかし可動鉄心を吸着してしまえば空隙
はほぼなくなシ、鉄心はほぼ完全な磁気回路を形成する
ので固定鉄心と可動鉄心との吸引力は増大し、小さいコ
イル電流でこれを維持することができる。このような観
点から第１図または第２図に示すような交流電源を整流
した直流電流を鉄心と操作コイルを備えた電磁石部の操
作コイルに通電する交流電磁石装置が公知である。Regardless of direct current, there is always a large gap between the fixed core and the movable core, and the movable core usually carries the load that it must drive, so when the fixed core draws in this, a large ampere turn is required. A large current must be passed through the operating coil. However, once the movable core is attracted, there is almost no air gap, and the core forms an almost complete magnetic circuit, so the attractive force between the fixed core and the movable core increases, and this can be maintained with a small coil current. can. From this point of view, an AC electromagnet device as shown in FIG. 1 or 2 is known, in which a DC current obtained by rectifying an AC power supply is applied to an operating coil of an electromagnet section including an iron core and an operating coil.

第１図において、操作コイル１は常閉接点６と抵抗２と
の並列回路を介して全波整流装置３の直流端子に接続さ
れ、との全波整流装置３の交流端子がスイッチ４を介し
て交流電源５に接続されている。常閉接点６は可動鉄心
に連動し投入前と投入後で切換わる接点である。この電
磁石装置は、スイッチ４を閉じると金波整流装置３を介
して整流された直流電流が操作コイル１に流れて可動鉄
、心を吸引する。そして可動鉄心が吸着する′と常閉接
点６は開いて操作コイルｌに直列に抵抗２を挿入する。In FIG. 1, the operating coil 1 is connected to the DC terminal of a full-wave rectifier 3 through a parallel circuit of a normally closed contact 6 and a resistor 2, and the AC terminal of the full-wave rectifier 3 is connected to the DC terminal of the full-wave rectifier 3 through a switch 4. and is connected to an AC power source 5. The normally closed contact 6 is a contact that is linked to the movable iron core and is switched before and after closing. In this electromagnet device, when a switch 4 is closed, a DC current rectified through a gold wave rectifier 3 flows into an operating coil 1 and attracts the movable iron and the core. When the movable core is attracted, the normally closed contact 6 opens and the resistor 2 is inserted in series with the operating coil 1.

このような構成にすると操作コイルには直流電流が流れ
るから可動鉄心はその鉄損とうなυを除くことができ、
積層鉄心は軟鋼などの囲域鉄心とし、くま取シコイルを
除いて材料費や工数を節約することができる。また可動
鉄心が吸着された後は、抵抗が挿入されてコイル電流が
低減されるから、操作コイルの銅損は小さく、コイル自
体も小さくできる。しかし、この場合は抵抗２の銅損が
大きく大きな許容入力をもつ抵抗器が必要となる。次に
第２図は、全波整流装置３の交流端子に直列に常閉接点
６と無極性コンデンサ７の並列回路を接続し、スイッチ
４を介して交流電源５に接続されている。コンデンサ７
は、投入前には常閉接点６にょシ短絡されている。操作
コイル１は全波整流装置３の直流端子に直接接続されて
いる。この電磁石装置は、スイッチ４が閉じると、全波
整流装置３で整流された直流電流が操作コイル１に流れ
、固定鉄心が可動鉄心を吸引する。そして可動鉄心が吸
着すると常閉接点６が開いてコンデンサ７が全波整流装
置３の交流端子に直列に挿入され操作コイル１に流れる
電流が低減される。With this configuration, direct current flows through the operating coil, so the movable core can eliminate the iron loss υ.
The laminated core is an enclosed core made of mild steel, etc., and the material cost and man-hours can be saved by eliminating the square coil. Furthermore, after the movable core is attracted, a resistor is inserted to reduce the coil current, so the copper loss of the operating coil is small and the coil itself can be made smaller. However, in this case, the copper loss of the resistor 2 is large and a resistor with a large allowable input is required. Next, in FIG. 2, a parallel circuit of a normally closed contact 6 and a non-polar capacitor 7 is connected in series to the AC terminal of the full-wave rectifier 3, and is connected to an AC power source 5 via a switch 4. capacitor 7
is short-circuited to the normally closed contact 6 before it is turned on. The operating coil 1 is directly connected to the DC terminal of the full-wave rectifier 3. In this electromagnet device, when a switch 4 is closed, a direct current rectified by a full-wave rectifier 3 flows into an operating coil 1, and a fixed iron core attracts a movable iron core. When the movable iron core is attracted, the normally closed contact 6 opens and the capacitor 7 is inserted in series with the AC terminal of the full-wave rectifier 3, thereby reducing the current flowing through the operating coil 1.

このような構成とすれば、第１図に示したものと同様に
交流電流に基づく損失やうな）がないほかにコンデンサ
の損失も少ないという利点を有する。This configuration has the advantage that, like the configuration shown in FIG. 1, there is no loss due to alternating current (such as that caused by alternating current), and there is also little loss in the capacitor.

ところが投入後の無効電力が大きくなり、容量性負荷を
開閉するため接点の寿命が短くなるという欠点がある。However, there are disadvantages in that the reactive power increases after turning on, and the life of the contacts is shortened because they open and close a capacitive load.

また電源電圧を分担するために耐圧の高い容量の大きい
、しだがって外形の大きいコンデンサを付属させるため
に装置が大形化するという欠点がある。Another disadvantage is that the device becomes larger because a capacitor with a high withstand voltage, large capacity, and therefore a large external shape is attached to share the power supply voltage.

〔発明の目的〕[Purpose of the invention]

本発明は上述の欠点を除去し、損失が少なく、小形で信
頼性の高い交流電磁石装置を提供することを目的とする
。It is an object of the present invention to eliminate the above-mentioned drawbacks and to provide an AC electromagnet device which has low loss, is small in size, and has high reliability.

〔発明の要点〕[Key points of the invention]

本発明は上述の目的を達成するため、一つの可動鉄心を
吸引する固定鉄心に巻かれた複数の操作コイルと、この
操作コイルをその直流端子に接続るダイオードと、前記
鉄心が吸引されると動作しそれぞれの操作コイルを接続
換えする接点とを備え、前記それぞれの操作コイルが鉄
心を吸引するときは並列に接続され、鉄心吸引後は直列
に接続されるようにした交流電磁石装置である。すなわ
ち、鉄心を吸引する操作コイルに全波整流装置で整流し
た直流電流を流して励磁し、交流電流に基づく欠点を除
くとともに、複数に分割した操作コイルを鉄心吸引時に
は並列に接続して操作コイルに大電流を流して鉄心の吸
引を確実にし、鉄心吸列後は、この操作コイルを直列に
接続して小電流で吸引した鉄心を維持させることによシ
ミ力の節約と操作コイルの小形化をはかる構成としたも
のである。なお接点はこの種の器具に普通性われるよう
に可動鉄心と連動する常閉接点を用いてもよいが、鉄心
吸引時に流れる電流によ多動作する限時動作形の常閉接
点または電源投入によシ閉じ、鉄心吸引後開くワンショ
ト形常開接点としてもよく、これらの接点を無接点スイ
ッチとすると信頼性はさらに向上する。In order to achieve the above-mentioned object, the present invention includes a plurality of operating coils wound around a fixed core that attracts one movable core, a diode that connects the operating coil to its DC terminal, and a diode that connects the operating coil to its DC terminal. The AC electromagnet device is equipped with a contact point that operates to change the connection of each operating coil, and the respective operating coils are connected in parallel when attracting an iron core, and are connected in series after attracting an iron core. In other words, a direct current rectified by a full-wave rectifier is passed through the operating coil that attracts the iron core to excite it, eliminating the drawbacks caused by alternating current, and the operating coil is divided into multiple parts and connected in parallel when attracting the iron core. A large current is applied to the core to ensure attraction of the core, and after the core has been drawn in, this operating coil is connected in series to maintain the attracted core with a small current, thereby saving staining force and downsizing the operating coil. The structure is designed to measure the following. Note that the contact may be a normally closed contact that works with the movable core as is common in this type of equipment, but it is also possible to use a normally closed contact that operates in response to the current flowing when the core is attracted, or a normally closed contact that operates only when the power is turned on. It is also possible to use a one-shot type normally open contact that closes and opens after the core is drawn in. If these contacts are used as non-contact switches, reliability will be further improved.

〔発明の実施例〕[Embodiments of the invention]

本発明の実施例を第３図ないし第６図に示す各実施例の
結線図に基づいて詳細に説明する。いずれの実施例にお
いても電磁石装置は、図示しない固定鉄心、この固定鉄
心に吸引される可動鉄心、同一固定鉄心に複数個に分割
して巻かれた操作コイル１（分割された場合１ａ、　ｌ
ｂ、　Ｉｃ・・・とする）を備えた電磁石部と、可動鉄
心に連動する幾つかの常閉接点６（複数個の場合６ａ、
　６ｂ・・・・・・とする）と、この電磁石装置に直流
電流を給電する全波整流装置３（複数個の場合３ａ、　
　３ｂ・・とする）と、電流方向を決定する幾つかのダ
イオード７．８゜９（複数個の場合それぞれａ、ｂ、ｃ
の添字を付す）とを備えだ制御回路とを備えている。Embodiments of the present invention will be described in detail based on the connection diagrams of each embodiment shown in FIGS. 3 to 6. In any of the embodiments, the electromagnet device includes a fixed core (not shown), a movable core attracted to the fixed core, and an operating coil 1 that is divided and wound around the same fixed core (1a, 1 in the case of divided parts).
b, Ic...), and several normally closed contacts 6 (in the case of multiple contacts, 6a,
6b...), and a full-wave rectifier 3 (in the case of multiple units, 3a,
3b...) and several diodes 7.8°9 (in case of multiple diodes, a, b, c, respectively) that determine the current direction.
) and a control circuit.

第３図において、制御回路は、二つに分割された操作コ
イルｌａ、　　ｌｂの一方の操作コイル１ａとダイオー
ド７と他方の操作コイル１ｂとを直列に接続して、この
両端が全波整流装置３の直流端子に接続されている。そ
して操作コイル１ａとダイオード接続されている。いい
かえればこの制御回路は、二つの常閉接点６ａ、　６ｂ
が閉じているとき二つの操作コイル］、ａ、　ｌｂか並
列に接続され、この間にダイオード７が接続されている
１、 全波整流装置３の交流端子Ｒ，Ｓに単相交流電圧が印加
されると、との全波整流装置３の直流端子に現われる電
圧は、操作コイル１ａと常閉“接点６ａの直列回路と、
常閉接点６ｂと操作回路１ｂの直列回路にそれぞれ印加
されて、それぞれの操作コイルＩａ、　　ｌｂに別個に
直流電流が流れる。このときダイオード７のアノード側
はカンード側よシミ位が低いので、ダイオード７には電
流は流れない。In FIG. 3, the control circuit connects in series one of the two operating coils la and lb, one operating coil 1a, a diode 7, and the other operating coil 1b, with both ends connected to a full-wave rectifier. It is connected to the DC terminal of 3. It is diode-connected to the operating coil 1a. In other words, this control circuit has two normally closed contacts 6a and 6b.
When the two operating coils], a, and lb are connected in parallel, and a diode 7 is connected between them, a single-phase AC voltage is applied to the AC terminals R and S of the full-wave rectifier 3. Then, the voltage appearing at the DC terminal of the full-wave rectifier 3 is the same as that of the series circuit of the operating coil 1a and the normally closed contact 6a.
A DC current is applied to the series circuit of the normally closed contact 6b and the operating circuit 1b, and flows separately to the respective operating coils Ia and lb. At this time, since the anode side of the diode 7 has a lower stain level than the cand side, no current flows through the diode 7.

二つの操作コイルｌａ、　ｌｂに直流電流が流れると可
動鉄心は固定鉄心に吸引される。そして可動鉄心が吸着
されるかまたは吸着される直前に二つの常閉接点６ａ、
　６ｂが開き、二つの操作コイルｌａ。When a direct current flows through the two operating coils la and lb, the movable core is attracted to the fixed core. Then, two normally closed contacts 6a,
6b opens and the two operating coils la.

１ｂはダイオード７を介して直列接続されることになる
。したがって二つの操作コイルｌａ、　　ｌｂは全波整
流装置３の直流端子の電圧をそれぞれ分担することにな
シ、それぞれの操作コイルｌａ、　ｌｂに流れる電流は
可動鉄心の吸引時のほぼ半分になる。1b are connected in series via a diode 7. Therefore, the two operating coils la and lb share the voltage of the DC terminal of the full-wave rectifier 3, and the current flowing through each operating coil la and lb becomes approximately half that when the movable iron core is attracted.

この電流は吸引した鉄心を十分維持できる。このとき投
入時に必要な電流が２人であるとすると投入後は１／２
となるので結局投入後の電流は投入前のほぼ１／４に減
少する。This current is sufficient to maintain the attracted iron core. At this time, if the current required for turning on is 2 people, the current required after turning on is 1/2.
Therefore, the current after turning on is reduced to approximately 1/4 of the current before turning on.

第４図は本発明の異なる実施例を示し、図では、４分割
された操作コイルＩａ、　ｌｂ、　Ｉｃ、　ｌｄ　カタ
イオード８ａ、　８ｂ、　８ｃとダイオード９ａ、　９
ｂ、　９ｃによ多並列に接続されている。そしてこの直
列回路が全波整流装置３の正極側（以下■端子という）
直流端子に操作コイル１ａの一端と常閉接点６ｂが負極
側（以下○端子とい°う）操作コイル１ｄの一端と常閉
接点６ａが接続されている。そして常閉接点６ａ。FIG. 4 shows a different embodiment of the present invention, in which the operating coils Ia, lb, Ic, ld are divided into four, cathodes 8a, 8b, 8c and diodes 9a, 9.
b and 9c are connected in parallel. This series circuit is the positive terminal of the full-wave rectifier 3 (hereinafter referred to as ■ terminal).
One end of the operating coil 1a and the normally closed contact 6b are connected to the DC terminal, and one end of the operating coil 1d on the negative electrode side (hereinafter referred to as the ○ terminal) and the normally closed contact 6a are connected. and a normally closed contact 6a.

６ｂが開放したときに操作コイル１ａ〜１ｄが直列接続
されるようにダイオード７ａ〜７ｃが挿入されている。Diodes 7a to 7c are inserted so that when 6b is opened, operating coils 1a to 1d are connected in series.

常閉接点６ａは操作コイル１ａの○端子側と全波整流装
置３の○端子との間に接続され、常閉接点６ｂは操作コ
イル１ｄの■端子側と全波整流装置３の■端子との間に
接続されている。この実施例において二つの常閉接点６
’ａ、　６ｂが閉じているとき次の（ａ）　（ｂ）　（
ｃ）　（ｄ）の主な４回路が形成されている。The normally closed contact 6a is connected between the ○ terminal side of the operating coil 1a and the ○ terminal of the full-wave rectifier 3, and the normally closed contact 6b is connected between the ■ terminal side of the operating coil 1d and the ■ terminal of the full-wave rectifier 3. connected between. In this embodiment two normally closed contacts 6
When 'a, 6b are closed, the following (a) (b) (
c) The four main circuits shown in (d) are formed.

（ａ）・・・■端子−コイルｌａ　　ｍＡ６ａ−ｅ端子 （ハ）・・・■端子−接点６ｂ−ダイオード３ｃ、８ｂ
　−コイル１ｂ−ダイオード９ａ−接点 ６ａ　−（）端子 （ｃ）・・・■端子−接点６ｂ−ダイオード８ｃ−コイ
ルＩＣ−ダイオード９ａ。(a)...■Terminal - Coil la mA6a-e terminal (c)...■Terminal - Contact 6b - Diode 3c, 8b
- Coil 1b - Diode 9a - Contact 6a - () Terminal (c)...■Terminal - Contact 6b - Diode 8c - Coil IC - Diode 9a.

９ｂ−接点６ａ　−０端子 （ｄ）・・■端子−接点６ｂ−コイル１ｄ−θ端子 このように常閉接点６ａ、　６ｂが閉じているときには
各回路には必ず１個の操作コイルが挿入されている。従
って全波整流装置３の交流端子Ｒ，Ｓに単相交流電圧が
印加δれると、との全波整流装置３の直流端子に現われ
る電圧は、前記（ａ）　（ｂ）　（ｃ）　（ｄ）の４回
路にそれぞれ印加されて各操作コイルｌａ。9b - Contact 6a - 0 terminal (d)... ■ Terminal - Contact 6b - Coil 1d - θ terminal When the normally closed contacts 6a and 6b are closed in this way, one operating coil is always inserted in each circuit. ing. Therefore, when a single-phase AC voltage is applied to the AC terminals R and S of the full-wave rectifier 3, the voltages appearing at the DC terminals of the full-wave rectifier 3 are (a), (b), (c), and (d). ) is applied to each of the four circuits of each operating coil la.

ｌｂ、　ｌｃ、　ｌｄには直流電流が流れる。このとき
一部の操作コイルｌｂ、　ｌｃには他の操作コイルＩａ
。Direct current flows through lb, lc, and ld. At this time, some operating coils lb and lc are connected to other operating coils Ia.
.

１ｄよシも多くのダイオードを介して電流が流れるが、
このダイオードの順方向抵抗は操作コイルｌａ。Although current flows through many diodes in 1d,
The forward resistance of this diode is the operating coil la.

ｌｂ、　ｌｃ、　Ｉｄの抵抗に比べて非常に小さいから
、各操作コイルｌａ、　ｌｂ、　ｌｃ、　ｌｄの電流は
ほぼ等しい。この電流によシ可動鉄心は固定鉄心に吸引
される。可動鉄心が吸着されるか吸着される直前にこの
鉄心に連動する常閉接点６ａ、’６ｂが開き、この回路
は、■端子−コイル１ａ−ダイオード７ａ’−コイル１
ｂ−ダイオード７ｂ−コイルＩＣ−ダイオード７ｃｍコ
イル１ｄ−θ端子とつぎつぎに接続される一つの直列回
路になる。したがって各操作コイルｌａ、　ｌｂ、　ｌ
ｃ、　Ｉｄは全波整流装置３の直流端子の電圧を互いに
分担するから、各操作コイルに流れる電流は可動鉄心吸
引時のほぼ１／４に減少する。Since the resistances of lb, lc, and ld are very small compared to the resistances of lb, lc, and ld, the currents of each operating coil la, lb, lc, and ld are approximately equal. This current causes the movable core to be attracted to the fixed core. Normally closed contacts 6a and '6b linked to the movable iron core are opened when the movable iron core is attracted or just before it is attracted, and this circuit is formed as follows: ■Terminal - Coil 1a - Diode 7a' - Coil 1
b-Diode 7b-Coil IC-Diode 7cm coil 1d-Theta terminal are connected one after another to form one series circuit. Therefore, each operating coil la, lb, l
Since c and Id mutually share the voltage at the DC terminals of the full-wave rectifier 3, the current flowing through each operating coil is reduced to approximately 1/4 of that when the movable iron core is attracted.

この電流は吸引した鉄心を維持するには十分である。こ
のとき全波整流装置の負担する電流は投入に必要な電流
を４Ａとすると投入後は投入前のほぼＬ／１６である。This current is sufficient to maintain the attracted core. At this time, assuming that the current required for turning on is 4A, the current borne by the full-wave rectifier after turning on is approximately L/16 of the current before turning on.

第４図に示す回路は操作コイルを２個以上の任意の個数
に分割することができ分割個数に応じて電流が変化する
。In the circuit shown in FIG. 4, the operating coil can be divided into two or more arbitrary numbers, and the current changes according to the number of divisions.

第５図は本発明の異なる実施例を示し、二つに分割され
た操作コイルｌａ、　Ｉｂ０間に二つのダイオード７ａ
、　７ｂの直列回路と他の二つのダイオード８ａ、　８
ｂの直列回路とを並列に接続した回路を挿入した操作コ
イルｌａ、　ｌｂの直列回路を形成させ、この直列回路
の両端がダイオード３ａ、　３ｂ。FIG. 5 shows a different embodiment of the present invention, in which two diodes 7a are connected between the operating coils la and Ib0, which are divided into two.
, 7b in series circuit and other two diodes 8a, 8
A series circuit of operating coils la and lb is formed by inserting a circuit connected in parallel with the series circuit of b, and both ends of this series circuit are connected to diodes 3a and 3b.

３ｃ、　３ｄで形成された全波整流装置の直流端子■ｅ
に接続され、ダイオード７ａ、　　７ｂの接続点と一方
の交流端子Ｒとの間およびダイオード８ａ、　　８ｂの
接続点と他方の交流端子Ｓとの間にそれぞれ常閉接点６
ａ、　６ｂが接続されている。DC terminal of the full wave rectifier formed by 3c and 3d■e
A normally closed contact 6 is connected between the connection point of the diodes 7a and 7b and one AC terminal R, and between the connection point of the diodes 8a and 8b and the other AC terminal S.
a and 6b are connected.

また第６図は本発明の異なる実施例を示し、二つに分割
された操作コイルｌａ、　ｌｂが二つの直列に接続され
たダイオード８ａ、　８ｂを介して直列に接続され、こ
の直列回路の両端がダイオード３ａ。Further, FIG. 6 shows a different embodiment of the present invention, in which two divided operating coils la and lb are connected in series via two series-connected diodes 8a and 8b, and both ends of this series circuit are connected in series. is diode 3a.

３ｂ、　３ｃ、　３ｄで形成された全波整流装置の直流
端子■○にダイオード８ａ、　ｓｂのアノード側の操作
コイル１ａが■端子にカソード側の操作コイル１ｂが○
端子になるように接続され、操作コイル１ａとダイオー
ド８ａとの全波整流装置の一方の交流端子例えばＲ端子
との間にダイオード７ａがそのカソードを交流端子Ｒ側
として接続され、操作コイル１ｂとダイオード８ｂとの
接続点と全波整流装置の同じ交流端子Ｒとの間にダイオ
ード７ｂがそのアノードを交流端子Ｒ側として接続され
ている。また直列に接続された二つのダイオード８ａ、
　８ｂの接続点と他方の交流端子Ｓとの間に常閉接点６
ａが接続されている。第５図に示す回路と第６図に示す
回路は、いいかえれば常閉接点６ｂ、　６ｂ　（第６図
では６ｂを除く）が閉じているとき、４個のダイオード
３ａ。The diode 8a is connected to the DC terminal ■○ of the full-wave rectifier formed by 3b, 3c, and 3d, and the operating coil 1a on the anode side of sb is connected to the ■terminal, and the operating coil 1b on the cathode side is connected to ○.
A diode 7a is connected with its cathode on the AC terminal R side between the operation coil 1a and one AC terminal, for example, the R terminal, of a full-wave rectifier device consisting of the operation coil 1a and the diode 8a, and the operation coil 1b and A diode 7b is connected between the connection point with the diode 8b and the same AC terminal R of the full-wave rectifier, with its anode facing the AC terminal R side. Also, two diodes 8a connected in series,
A normally closed contact 6 is connected between the connection point of 8b and the other AC terminal S.
a is connected. In other words, in the circuit shown in FIG. 5 and the circuit shown in FIG. 6, when the normally closed contacts 6b and 6b (excluding 6b in FIG. 6) are closed, the four diodes 3a

亡 ３ｂ、　７ａ、　８ａで形成される全波整流装置３逃の
直流端子に操作コイル１ａが接続され、他の４個のダイ
オード７ｂ、　８ｂ、　３％、３ｄで形成される全波整
流装置３ｂの直流端子に操作コイル１ｂが接続されてい
る。The operating coil 1a is connected to the DC terminal of the full-wave rectifier 3 formed by the diodes 3b, 7a, and 8a, and the full-wave rectifier 3b is formed by the other four diodes 7b, 8b, 3%, and 3d. The operating coil 1b is connected to the DC terminal of the controller.

はそれぞれ共通のＲ，Ｓ端子に接続されている。are connected to common R and S terminals, respectively.

第５図と第６図に示す回路はいずれも、Ｒ，Ｓ端子に単
相交流電圧が印加されると、それぞれの全波整流装置３
８．３！ｌの直流端子に現われる電圧によシ、それぞれ
の操作コイルｌａ、　ｌｂに単独に直流電流が流れる。In both the circuits shown in FIGS. 5 and 6, when a single-phase AC voltage is applied to the R and S terminals, each full-wave rectifier 3
8.3! Depending on the voltage appearing at the DC terminal of I, a DC current flows independently through each of the operating coils la and lb.

すると可動鉄心が固定鉄心に吸着され、このとき可動鉄
心に連動する常閉接点５ａ、　６ｂ　（第６図の場合は
６ｂを除く）が開く。これにより回路は、ダイオード３
ａ、　３ｂ、　３ｃ、　３ｄからなる全波整流装置の直
流端子に二つの分割された操作コイルｌａ、ｌｂがダイ
オード７ａ、　７ｂ、　８ａ。Then, the movable core is attracted to the fixed core, and at this time, the normally closed contacts 5a and 6b (excluding 6b in the case of FIG. 6) which are interlocked with the movable core are opened. This makes the circuit diode 3
A, 3b, 3c, and 3d have two divided operation coils la and lb connected to the DC terminals of the full-wave rectifier including diodes 7a, 7b, and 8a.

８ｂ（第６図では８ａ、　８ｂを除く）を介して接続さ
れた直列回路となる。したがって２つの操作コイルｌａ
、　　ｌｂは全波整流装置で整流された直流電圧を分担
するのでそれぞれの操作コイルｌａ、１ｂｉＣ流れる電
流は可動鉄心を吸引するときのほぼ半分に減少する。こ
の電流は吸引した可動鉄心を維持するには十分な値であ
る。しかも全波整流装置の負担する電流は鉄心を吸引す
る時の電流のほぼ１／４である。8b (excluding 8a and 8b in FIG. 6), forming a series circuit. Therefore, the two operating coils la
, lb share the DC voltage rectified by the full-wave rectifier, so the current flowing through each of the operating coils la and 1biC is reduced to approximately half that when the movable iron core is attracted. This current is sufficient to maintain the attracted movable core. Moreover, the current borne by the full-wave rectifier is approximately 1/4 of the current when attracting the iron core.

以上の実施例では分割された複数の操作コイルを並列か
ら直列に接続換えする接点は、可動接点と連動する常閉
接点としたが、これを鉄心吸引時に流れる電流により動
作する限時動作形の常閉接点としてもよく、またこれを
電源投入によシ瞬時動作し、鉄心吸引時だけ閉じる限時
タイマ付きのワンショット常開接点としてもよい。さら
にこれらの接点をそれぞれ上述の動作をする無接点スイ
ッチとすると信頼性が向上する。ただしこのような無接
点スイッチを用いる場合のスイッチ素子は第３崗および
第４図に示す回路では直流電流を開閉するのでトランジ
スタでよいが第５図および第６図に示す回路では交流電
流を開閉するので２方〔発明の効果〕 以上述べたように本発明による交流電磁石装置は、電磁
石部が全波整流装置により整流された直流電流を操作コ
イルに流して操作され、小形で消費電力を小さくされる
とともに操作コイルは複数個に分割され、鉄心吸引時に
はこの複数個の操作コイルを並列に接続して鉄心に吸引
電流を流し、鉄心吸引後は直列に接続して吸引した鉄心
を維持するだけの低電流とされるから、電力の消費が少
なく、かつ操作コイルと全波整流装置は短時間定格とし
て小形にすることができ、大形部品を付属させることも
ないから全体として小形にまとめることができる。なお
接点は無接点素子を用いてさらに信頼度を向上させるこ
とができる。In the above embodiment, the contact that connects the plurality of divided operation coils from parallel to series is a normally closed contact that works with a movable contact. It may be a closed contact, or it may be a one-shot normally open contact with a timer that operates instantly when the power is turned on and closes only when the core is attracted. Furthermore, if these contacts are each non-contact switches that operate as described above, reliability will be improved. However, when using such a non-contact switch, the switching element can be a transistor because the circuits shown in Figures 3 and 4 switch on and off DC current, but the circuits shown in Figures 5 and 6 switch on and off AC current. [Effects of the Invention] As described above, in the AC electromagnet device according to the present invention, the electromagnet section is operated by passing a DC current rectified by a full-wave rectifier to the operating coil, and is small and consumes little power. At the same time, the operation coil is divided into multiple pieces, and when the core is attracted, these multiple operation coils are connected in parallel to flow a suction current to the core, and after the core is attracted, they are connected in series to maintain the attracted core. Since the current is low, power consumption is low, and the operation coil and full-wave rectifier can be made compact for short-time ratings, and the overall size can be made small because no large parts are attached. Can be done. Note that the reliability can be further improved by using non-contact elements as the contacts.

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

第１図および第２図はそれぞれ従来の交流電磁石装置の
主壁部を示す結線図、第３図ないし第６図は本発明によ
る交流電磁石装置のそれぞれ異なる実施例の主要部を示
す結線図である。 ９ｂ、　９ｃ・・・ダイオード。 ヤ（（２） 一″￥′Ｚ（２）1 and 2 are wiring diagrams showing the main wall portions of a conventional AC electromagnet device, respectively, and FIGS. 3 to 6 are wiring diagrams showing main parts of different embodiments of the AC electromagnet device according to the present invention. be. 9b, 9c...diodes. ya ((2) 1″￥′Z(2)

Claims (1)

【特許請求の範囲】 １）一つの可動鉄心を吸引する固定鉄心に巻かれかつ複
数に分割された操作コイルと、この操作コイルがその直
流端子に接続される全波整流装置と、前記それぞれの操
作コイルに接続されこれらの操作コイルの電流方向を決
定するダイオードと、常時は閉成し、前記可動鉄心が吸
引されると動作して切換わる接点とを備え、前記それぞ
れの操作コイルが接点の閉成時には並列に接続され、接
点開成時には直列に接続される制御回路を有することを
特徴とする交流電磁石装置。 ２、特許請求の範囲第１項に記載の交流電磁石装置にお
いて、前記接点は鉄心吸引時に流れる電流により動作す
る限時動作形の常閉接点であることを特徴とする交流電
磁石装置。 ３）特許請求の範囲第１項に記載の交流電磁石装置にお
いて、前記接点は電源投入により閉じ、鉄心吸引後開く
フンショット形常開接点であることを特徴とする交流電
磁石装置。 ４ン特許請求の範囲第１項ないし第３項のいすかに記載
の交流電磁石装置において、前記接点は無接点スイッチ
であることを特徴とする交流電磁石装置。[Scope of Claims] 1) An operating coil wound around a fixed core that attracts one movable core and divided into a plurality of parts, a full-wave rectifier to which this operating coil is connected to its DC terminal, and each of the above-mentioned A diode connected to the operating coils determines the current direction of these operating coils, and a contact that is normally closed and operates to switch when the movable core is attracted, and each of the operating coils has a contact point. An AC electromagnet device characterized by having a control circuit that is connected in parallel when the contact is closed and connected in series when the contact is opened. 2. The AC electromagnet device according to claim 1, wherein the contact is a normally closed contact of a time-limited operation type that is operated by a current flowing when the iron core is attracted. 3) The AC electromagnet device according to claim 1, wherein the contact is a normally open contact that closes when the power is turned on and opens after the core is attracted. 4. An AC electromagnet device according to any one of claims 1 to 3, wherein the contact is a non-contact switch.