JPS59181004A - Driving circuit for coil of electromagnet device - Google Patents
Driving circuit for coil of electromagnet deviceInfo
- Publication number
- JPS59181004A JPS59181004A JP5479583A JP5479583A JPS59181004A JP S59181004 A JPS59181004 A JP S59181004A JP 5479583 A JP5479583 A JP 5479583A JP 5479583 A JP5479583 A JP 5479583A JP S59181004 A JPS59181004 A JP S59181004A
- Authority
- JP
- Japan
- Prior art keywords
- coil
- transistor
- current
- switch
- pulse signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
- H01H47/22—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for supplying energising current for relay coil
- H01H47/32—Energising current supplied by semiconductor device
- H01H47/325—Energising current supplied by semiconductor device by switching regulator
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Relay Circuits (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の属する技術分野〕
この発明は電磁開閉器等の電磁石装置のコイル駆動回路
に関する。この種のコイル駆動回路は一般に小形、低消
費電力、低騒音、動作時間および釈放時間が短かいこと
が望まれる０
〔従来技術とその問題点〕
この種の従来装置として第１図、第２図および第３図に
示す装置が知られている。DETAILED DESCRIPTION OF THE INVENTION [Field of the Invention] The present invention relates to a coil drive circuit for an electromagnetic device such as an electromagnetic switch. Generally, it is desirable for this type of coil drive circuit to be small, low power consumption, low noise, short operating time and short release time. The apparatus shown in FIG. 3 and FIG. 3 is known.
第１図は最も一般的に用いられている単相交流電圧を直
接電磁石のコイルに印加するものであり、１は単相交流
電源、２はスイッチ、３は電磁石のコイルである。今ス
イッチ２を閉成するとコイル３が励磁されて図示しない
可動鉄心が固定鉄心に吸引される。一般に交流電磁石は
可動鉄心と固定鉄心との間の空隙が大きい時、コイル３
のインダクタンスが小さく、コイル３には大きなラッシ
ュ電流が流れ、直流電磁石に比べ大きな吸引力が発生す
る０そして可動鉄心が吸引されて吸着が完了した後はイ
ンダクタンスが太き（なり、コイル３を流れる電流は小
さくなる。ところで、この装置は吸引力の脈動による可
動鉄心のうなりを防ぐためにシェーディングコイルが使
用されるが、完全なる脈動を避けることはできず、可動
鉄心の騒音が大きいという欠点を有する。さらにこの装
置は、鉄心内を磁束が交番するため、鉄心内のヒステリ
シス損及びシェーディングコイル損等により吸着状態で
の消５Ｒ電力が大きく轟然のことながら鉄心が完全に吸
引されない場合には大きな電流が流れ続けるのでコイル
が焼損する場合があるという欠点を有する。In FIG. 1, the most commonly used single-phase AC voltage is applied directly to the electromagnetic coil, where 1 is a single-phase AC power supply, 2 is a switch, and 3 is the electromagnetic coil. When the switch 2 is now closed, the coil 3 is excited and the movable core (not shown) is attracted to the fixed core. Generally, when the air gap between the movable iron core and the fixed iron core is large, AC electromagnets
The inductance is small, and a large rush current flows through the coil 3, generating a large attraction force compared to a DC electromagnet. The current becomes smaller.By the way, this device uses a shading coil to prevent the movable core from beating due to the pulsation of the attractive force, but it cannot completely avoid pulsation and has the disadvantage that the movable core makes a lot of noise. Furthermore, since the magnetic flux in this device alternates within the core, the 5R power dissipated in the attracted state is large due to hysteresis loss and shading coil loss within the core, but if the core is not completely attracted, a large current is generated. It has the disadvantage that the coil may burn out because the current continues to flow.
第２図は第１図に示す装置の欠点を除去するためにコイ
ル３を直流励磁化したものであり、４はダイオードブリ
ッジ回路からなる全波整流器、５はスイッチ２の投入時
と可動鉄心の吸着完了後に切換りかつ可動鉄心に連動し
た常時閉接点、６は経済抵抗である。この装置はスイッ
チ２を投入すると全波整流器４と閉接点５を介してコイ
ル３に大きなラッシュ電流が流れて可動鉄心が吸引され
、この可動鉄心の吸着時に閉接点５が開放して経済抵抗
６がコイル３に直列に挿入され、可動鉄心の吸着後にコ
イル３には可動鉄心の吸着を保持する保持電流のみを流
して大きな電流が流れ続けるのを防ぐものである。とこ
ろが、この装置では経済抵抗６による銅損により電力が
消費される。また、この経済抵抗６は発熱を伴ない、こ
のために経済抵抗は一般に電磁石の外部につけられるた
め外形寸法が大きくなるという欠点を有する。In Fig. 2, the coil 3 is excited by direct current to eliminate the drawbacks of the device shown in Fig. 1. 4 is a full-wave rectifier consisting of a diode bridge circuit, and 5 is a coil 3 that is connected to the movable iron core when the switch 2 is turned on. A normally closed contact 6, which is switched after completion of suction and is linked to the movable core, is an economical resistance. In this device, when the switch 2 is turned on, a large rush current flows through the coil 3 via the full-wave rectifier 4 and the closing contact 5, attracting the movable iron core, and when the movable iron core is attracted, the closing contact 5 opens and the economic resistance 6 is inserted in series with the coil 3, and after the movable core is attracted, only a holding current that maintains the attraction of the movable core is passed through the coil 3 to prevent a large current from continuing to flow. However, in this device, power is consumed due to copper loss due to the economical resistance 6. Furthermore, this economical resistor 6 generates heat, and therefore has the drawback that the external dimensions become large because the economical resistor is generally attached to the outside of the electromagnet.
第３図は第２図に示す装置の欠点を除去するために、全
波整流器４の前に常時閉接点５とコンデンサ７の並列回
路を挿入したものであり、コンデンサ７により第２図に
示す経済抵抗６の熱損失を解消したものである（特開昭
５７−８８７０７号公報）。In order to eliminate the drawbacks of the device shown in FIG. 2, FIG. 3 shows a parallel circuit consisting of a normally closed contact 5 and a capacitor 7 inserted in front of the full-wave rectifier 4. This eliminates the heat loss of economic resistance 6 (Japanese Patent Application Laid-Open No. 57-88707).
ところで前記第２図および第３図に示す従来装置におい
て、それぞれ経済抵抗６およびコンデンサ７を挿入する
ために用いられている常時閉接点５は、電磁開閉器の機
構に精密に連動することが必要である。何故ならばこの
常時閉接点５は鉄心が吸着完了したにもかかわらず接点
５が閉じていると過電流が流れ、吸着寸前に接点５が早
く動作すると鉄心が初期状態に戻りこれにより再び接点
５が閉じて鉄心の吸引が開始されというような反復動作
が繰り返えされる。従って、機構の摩耗。By the way, in the conventional devices shown in FIGS. 2 and 3, the normally closed contacts 5 used to insert the economical resistor 6 and the capacitor 7, respectively, must be precisely linked to the mechanism of the electromagnetic switch. It is. This is because if the contact 5 is closed even though the core has been completely attracted, an overcurrent will flow through the normally closed contact 5. If the contact 5 operates quickly just before the core is attracted, the core will return to its initial state and the contact 5 will close again. The valve closes and suction of the iron core begins, and this repetitive operation is repeated. Hence, the wear of the mechanism.
接点の消耗、異物の侵入等により常時閉接点５がｂ接点
機能を果さなくなった場合コイルが焼損することかある
。また、第２図および第３図に示す装置はスイッチ２を
開放した時、コイル３に流れていた直流電流が全波整流
器４を通してフライホイール電流として流れるため釈放
時間が長くなり、この結果高頻度開閉できないという欠
点がある。If the normally closed contact 5 no longer functions as a B contact due to wear of the contact, intrusion of foreign matter, etc., the coil may burn out. In addition, in the devices shown in FIGS. 2 and 3, when the switch 2 is opened, the direct current flowing through the coil 3 flows through the full-wave rectifier 4 as a flywheel current, which lengthens the release time, resulting in high frequency The drawback is that it cannot be opened or closed.
すなわち、第７図に示すようにスイッチ２を投入したと
き、コイル３に流れる電流は徐々に大きくなり、鉄心が
吸着又は吸着直前のｔｏ時点で常時閉接点５が開放する
ことにより電流は減少して吸着保持に必要な電流が流れ
続ける０そしてスイッチ２を開放した場合には全波整流
器４を通してフライホイール電流が流れるため電流は徐
々に減少して零となる。That is, as shown in FIG. 7, when the switch 2 is turned on, the current flowing through the coil 3 gradually increases, and the normally closed contact 5 opens when the iron core is attracted or just before the attraction, and the current decreases. Then, when the switch 2 is opened, a flywheel current flows through the full-wave rectifier 4, so that the current gradually decreases to zero.
この発明の目的は上述の欠点を除去し、機構による常時
閉接点を省き、コイル焼損がなく、小形。The purpose of this invention is to eliminate the above-mentioned drawbacks, omit the normally closed contact by mechanism, prevent coil burnout, and be compact.
小消費電力、低騒音、釈放時間が短かい電磁開閉器等の
電磁石装置のためのコイル駆動回路を提供することにあ
る。An object of the present invention is to provide a coil drive circuit for an electromagnetic device such as an electromagnetic switch with low power consumption, low noise, and short release time.
前述の目的は本発明によれば、電源電圧開閉用のスイッ
チの投入から解放までの期間中導通常態に保たれる第１
のトランジスタ、この第１のトランジスタとサージアブ
ソーバとの並列回路にフライホイールダイオードが直列
接続された回路に並列に接続された電磁石装置のコイル
、このコイルに直列接続された第２のトランジスタおよ
び第２のトランジスタを制御し、かつ電磁石装置の吸着
に必要な所定の時間幅を有する投入パルス信号とこの所
定の時間幅を有する投入パルス信号が消滅してから一定
周期にて発生するパルス信号とを送出する信号発生器に
より電磁石装置のコイル駆動回路を構成することにより
達成される０〔発明の実施例〕
次に本発明の一実施例を図面に基づいて詳細に説明する
。According to the present invention, the above-mentioned object is achieved by providing a first switch which is kept in a conductive state during the period from the closing to the opening of the switch for switching on and off the power supply voltage.
a transistor, a coil of an electromagnetic device connected in parallel to a circuit in which a flywheel diode is connected in series to a parallel circuit of this first transistor and a surge absorber, a second transistor connected in series to this coil, and a second transistor connected in series to this coil. controls the transistor of the electromagnetic device, and sends out a pulse signal having a predetermined time width necessary for attracting the electromagnetic device and a pulse signal generated at a constant period after the pulse signal having the predetermined time width disappears. [Embodiment of the Invention] Next, an embodiment of the present invention will be described in detail with reference to the drawings.
第４図は本発明の原理回路図を示し、２０は直流電源、
２はスイッチ、３は電磁石装置のコイルである。８は信
号発生器であり、この信号発生器８は直流電源端子間に
接続された図示しないコンデンザとこのコンデンサに並
列に接続されたツェナーダイオードを有するＩＣ用電源
部８１と、ＩＣ用′ｉ＋！源８１からの基準電圧と直流
電源からの電圧を比較して直流電源電圧が基準電圧を越
える、すなわち電源′電圧が電磁開閉器等の可動鉄心を
吸引可能な電圧になったとき出力を発する電圧検出部８
２と、この′底圧検出部８２からの出力によって動作を
開始し、前記町ｍ鉄心の吸着を完了するに充分な時間＠
Ｔを有する投入パルス信号をゲート回路８５を介して端
子Ｓより出力するタイマ部羽と、タイマ部８３からの投
入パルス信号が終了してから一定周期のパルス信号をゲ
ート回路あを介して端子Ｓより出力する発振器８４とか
らなる。コイル３にエミッターコレクタが直列接続され
た第２のトランジスタ１２（以下単にトランジスタとい
う）のベースは信号発生器８の端子Ｓに接続され、第１
のトランジスタ１１（以下単にトランジスタという）の
エミッターコレクタとバリスタの一種の酸化亜鉛系の電
圧非直線抵抗体からなるサージアブソーバ９が並列回路
に直列にフライホイールダイオード１０を接続した回路
がコイル３に並列に接続され、トランジスタ１１のベー
スがスイッチ２を介して直流電源と接続されている。FIG. 4 shows a circuit diagram of the principle of the present invention, in which 20 is a DC power supply;
2 is a switch, and 3 is a coil of an electromagnetic device. 8 is a signal generator, and this signal generator 8 includes an IC power supply section 81 having a capacitor (not shown) connected between DC power supply terminals and a Zener diode connected in parallel to this capacitor, and an IC 'i+! The reference voltage from the source 81 is compared with the voltage from the DC power supply, and when the DC power supply voltage exceeds the reference voltage, that is, the power supply voltage reaches a voltage that can attract the movable iron core of an electromagnetic switch, etc., the voltage that outputs is generated. Detection section 8
2, the operation is started by the output from this 'bottom pressure detection section 82, and a sufficient time is required to complete the adsorption of the town m iron core.
A timer unit outputs an input pulse signal having T from a terminal S via a gate circuit 85, and a pulse signal of a fixed period after the input pulse signal from the timer unit 83 ends is outputted to a terminal S via a gate circuit A. It consists of an oscillator 84 that outputs more. The base of a second transistor 12 (hereinafter simply referred to as a transistor) whose emitter collector is connected in series to the coil 3 is connected to the terminal S of the signal generator 8,
A circuit in which a flywheel diode 10 is connected in series to a surge absorber 9 consisting of the emitter collector of a transistor 11 (hereinafter simply referred to as a transistor) and a varistor, which is a type of zinc oxide voltage non-linear resistor, is connected in parallel to the coil 3. The base of the transistor 11 is connected to a DC power supply via the switch 2.
第４図に示す回路の動作を第８図に示す波形図を用いて
説明する０第８図に示すようにスイッチ２を閉成すると
、信号発生器８には電源電圧が印加され、電圧検出部８
２により電源電圧かｔｍ開閉器等の可動鉄心が吸着可能
な電圧以上であることが検出されるとタイマ部８２から
ゲート回路８５を介して端子（Ｓ）に第８図に示すよう
な可動鉄心が吸着を完了するに充分な時間巾Ｔを有する
投入パルス信号を出力し、吸着完了後発振器８４からゲ
ート回路８５を介して端子Ｓに一定周期のパルス信号を
出力する。前記投入パルス信号によりトランジスタ化が
動作するとコイル３に流れるコイル電流は第８図に示す
ように時間Ｔの間はトランジスタ１１のベース、エミッ
タ→コイル３→トランジスタ１２を通して大きな電流が
流れる。このとき、フライホイールダイオード１０はト
ランジスタ１１にコイル３に発生する逆電圧が印加され
て被板するのを防いでいる。時間Ｔの経過後はトランジ
スタ化が一定周期のパルス信号で駆動されるためコイル
３に流れるコイル電流は減少して吸着を保持するに充分
な小さな電流となる。このトランジスタ１２が一定周期
のパルス信号で駆動されるとき、トランジスタ化がＯＮ
のときはコイル３に流れるコイル電流路は前記と同一で
あるが、トランジスタ１２がＯＦＦの期間は、トランジ
スタ１１のベース電流がトランジスタ１１のベース、エ
ミッタ間を通して信号発生器８の電流端子Ｐに流れるの
で、トランジスタ１１がＯＮしており、これによりコイ
ル３にはフライホイールダイオード１０、トランジスタ
１１を通してフライホイール電流が流れる。第８図に示
すコイル電流から明らかなようにコイル電流には零点が
発生しないため可動鉄心は安定して吸着しうなりを生じ
ることはない。The operation of the circuit shown in Fig. 4 will be explained using the waveform diagram shown in Fig. 8.0 When the switch 2 is closed as shown in Fig. 8, the power supply voltage is applied to the signal generator 8, and the voltage Part 8
2, when it is detected that the power supply voltage is higher than the voltage at which the movable core of a TM switch or the like can be attracted, the timer section 82 connects the movable core to the terminal (S) via the gate circuit 85 as shown in FIG. After the suction is completed, the oscillator 84 outputs a constant-cycle pulse signal to the terminal S via the gate circuit 85. When the transistorization is activated by the input pulse signal, a large coil current flows through the coil 3 through the base of the transistor 11, the emitter, the coil 3, and the transistor 12 during time T, as shown in FIG. At this time, the flywheel diode 10 prevents the reverse voltage generated in the coil 3 from being applied to the transistor 11 and covering it. After time T has elapsed, since the transistor is driven by a pulse signal of a constant period, the coil current flowing through the coil 3 decreases to a small enough current to maintain the attraction. When this transistor 12 is driven by a pulse signal of a constant period, transistorization is turned on.
In this case, the coil current path flowing through the coil 3 is the same as above, but while the transistor 12 is OFF, the base current of the transistor 11 flows between the base and emitter of the transistor 11 to the current terminal P of the signal generator 8. Therefore, the transistor 11 is turned on, and a flywheel current flows through the coil 3 through the flywheel diode 10 and the transistor 11. As is clear from the coil current shown in FIG. 8, since no zero point occurs in the coil current, the movable iron core is stably attracted and no beat occurs.
また、スイッチ２を開放した時にはトランジスタ化はｏ
ＦＦＬ、）ランジスタ１１もベース電流が無くなるため
直ちにＯＦＦするので、コイル電流はダイオード１０と
サージアブソーバ９を流れる。このときコイル３に蓄え
られて〜・たエネルキー（まコイル３の抵抗とサージア
ブソーバく９の抵抗により（肖費されるためコイル電流
は急激に減哀するＯ第７図および第８図に示したコイル
電流の波形図から明らかｌ了ように本発明にＪ６−・て
（まスイッチ２を開放してから電磁開閉器等の或磁石装
置力≦釈放するまでの時間が着しく短かくなる０なお、
時間Ｔの経過以前にスイッチ２を開放した場合、トラン
ジスタ１１．１２がともにＯＦＦするので、コイル電流
はフライホイールダイオード１０とサージアブソーバ９
により消費され１〈放時：司尋よ短かい０
次に第５図は本発明の異なる実施例を示し、直流、交流
電源を共用することができるようなこしたものでめる０
図の場合は単相交流Ｉ！！源１にスイッチ２を介して全
波整流器４を接続して交流電源を用いた場合を示してい
る。第５図にお〜・て第４図に示すものと異なる点はコ
イル３に直列にツェナーダイオード１３を接続して過電
圧がコイル３ｅこ印加されるのを防止するとともにトラ
ンジスタ１１のベースに保護用抵抗１４を接続した点で
ある。第５図に示した実施例の動作は第４図に示した装
置の動作と同様であり、ただトランジスタ１２がＯＮし
たときにコイル３に流れるコイル電流がツェナーダイオ
ード１３が導通したときにはツェナーダイオード１３を
流れる電流となり、ツェナーダイオード１３が不導通の
ときには抵抗１４からトランジスタ１１のベース、エミ
ッタを介して流れる電流となる点のみである。Also, when switch 2 is opened, transistorization is o.
Since the transistor 11 (FFL, ) is also immediately turned off due to the loss of base current, the coil current flows through the diode 10 and the surge absorber 9. At this time, the energy stored in the coil 3 (due to the resistance of the coil 3 and the resistance of the surge absorber 9) causes the coil current to decrease rapidly. As is clear from the waveform diagram of the coil current, the present invention significantly shortens the time from opening the switch 2 until the force of a certain magnet device such as an electromagnetic switch is released. In addition,
If the switch 2 is opened before the elapse of the time T, both the transistors 11 and 12 are turned off, so that the coil current flows through the flywheel diode 10 and the surge absorber 9.
Figure 5 shows a different embodiment of the present invention, in which a strained product can be used in which both DC and AC power sources can be used.
In the case of the figure, single-phase AC I! ! A case is shown in which a full-wave rectifier 4 is connected to the source 1 via a switch 2 and an AC power source is used. The difference between FIG. 5 and FIG. 4 is that a Zener diode 13 is connected in series with the coil 3 to prevent overvoltage from being applied to the coil 3e, and a protection is provided to the base of the transistor 11. This is the point where the resistor 14 is connected. The operation of the embodiment shown in FIG. 5 is similar to the operation of the device shown in FIG. When the Zener diode 13 is non-conductive, the current flows from the resistor 14 through the base and emitter of the transistor 11.
次に第６図は本発明のさらに異なる実施例を示し、交流
電源専用のものである。第６図において第５図に示すも
のと異なる点はトランジスタ１２のエミッターコレクタ
に並列にサイリスタ１５のアノード−カソードを接続し
、サイリスタ１５のケートに信号発生器８の端子Ｓ１か
ら送出される投入パルス信号を印加するようにし、トラ
ンジスタ１２のゲートに信号発生器８の端子Ｓ２から送
出される一定周期のパルス信号を印加するようにした点
であり、その波形図を第９図に示す。スイッチ２を閉成
してから信号発生器８の端子Ｓ１から時間Ｔだけ投入パ
ルス信号が送出されろことによりサイリスタ１５が点弧
すると、ツェナーダイオード１３および抵抗１４、トラ
ンジスタ１１のベース、エミッタ→コイル３→サイリス
タ１５を通して大きなコイル電流が流れる。交流電源の
ために脈流する電流の零点近くでサイリスタ１５はＯＦ
Ｆする。時間Ｔの経過後端子８２からの一定周期のパル
ス信号により トランジスタ１２がＯＮ、ＯＦＦを繰返
す。スイッチ２を解放したときの動作は前述の実施列と
同一であるので説明は省略する。Next, FIG. 6 shows yet another embodiment of the present invention, which is dedicated to an AC power source. The difference in FIG. 6 from that shown in FIG. 5 is that the anode and cathode of the thyristor 15 are connected in parallel to the emitter collector of the transistor 12, and the input pulse is sent from the terminal S1 of the signal generator 8 to the gate of the thyristor 15. The difference is that a pulse signal of a constant period sent from the terminal S2 of the signal generator 8 is applied to the gate of the transistor 12, and its waveform diagram is shown in FIG. When the thyristor 15 is ignited by sending a closing pulse signal from the terminal S1 of the signal generator 8 for a time T after the switch 2 is closed, the Zener diode 13 and resistor 14, the base and emitter of the transistor 11, and the coil 3→A large coil current flows through the thyristor 15. The thyristor 15 is turned off near the zero point of the pulsating current due to the AC power supply.
F. After time T has elapsed, the transistor 12 is repeatedly turned on and off by a pulse signal of a constant period from the terminal 82. The operation when the switch 2 is released is the same as in the above-mentioned embodiment, so the explanation will be omitted.
なお、前述の各実施例において、ツェナーダイオード１
３はダイオードか抵抗に替えることも可能で、サージア
ブソーバ９はツェナーダイオードか抵抗に替えることも
可能である。またサージアブソーバ９．ダイオード１０
によりトランジスタ１１の耐電圧が電源電圧より低いも
のを使用できるためコストの安いトランジスタを使用で
きる。In addition, in each of the above-mentioned embodiments, the Zener diode 1
3 can be replaced with a diode or a resistor, and the surge absorber 9 can also be replaced with a Zener diode or a resistor. Also surge absorber 9. diode 10
As a result, it is possible to use a transistor 11 whose withstand voltage is lower than the power supply voltage, and therefore, a low-cost transistor can be used.
以上に説明したとおり本発明によれば、電源電圧開閉用
のスイッチの投入から解放までの期間中導通常態に保た
れる第１のトランジスタ、この第１のトランジスタとサ
ージアブソーバとの並列回路にフライホイールダイオー
ドが直列接続された回路に並列に接続された電磁石装置
のコイル、このコイルに直列接続された第２のトランジ
スタおよび第２のトランジスタを制御し、かつ電磁石装
置の吸着に必要な所定の時間幅を有する投入パルス信号
とこの所定の時間幅を有する投入パルス信号が消滅して
から一定周期にて発生するパルス信号とを送出する信号
発生器を具えることにより、第２のトランジスタがＯＮ
のときは第１のトランジスタのベース−エミッタを介し
てコイル電流が流れ、第２のトランジスタがＯＦＦのと
きは第１のトランジスタがＯＮしていることによりフラ
イホイールダイオードと第１のトランジスタを介してコ
イル電流をフライホイール電流として流すことにより、
可動鉄心を安定して吸着しておくことができるので低騒
音でかつ消費電力が少なく、電源電圧を開閉するスイッ
チを開放すると第２のトランジスタがＯＦＦすることに
よりコイルのエネルギーがサージアブソーバにより吸収
されるので釈放時間を短縮することができるという利点
を有する０As explained above, according to the present invention, a first transistor that is kept in a conductive state during the period from turning on to releasing a switch for switching on and off the power supply voltage, and a parallel circuit of this first transistor and a surge absorber are provided with a A coil of an electromagnetic device connected in parallel to a circuit in which wheel diodes are connected in series, a second transistor connected in series to this coil, and a predetermined time required for controlling the second transistor and attracting the electromagnetic device. The second transistor is turned on by including a signal generator that sends out an input pulse signal having a width and a pulse signal that is generated at a constant period after the input pulse signal having a predetermined time width disappears.
When , the coil current flows through the base-emitter of the first transistor, and when the second transistor is OFF, the first transistor is ON, so the coil current flows through the flywheel diode and the first transistor. By passing the coil current as a flywheel current,
The movable iron core can be stably attracted, resulting in low noise and low power consumption. When the switch that opens and closes the power supply voltage is opened, the second transistor turns OFF, and the energy of the coil is absorbed by the surge absorber. This has the advantage of shortening the release time.
Ｍ１図ないし第３図はそれぞれ従来装置を示す回路図、
第４図ないし第６図はそれぞれ本発明の異なる実施例を
示す回路図、第７図ないし第９図はそれぞれ動作を説明
するための波形図である。
１：単相交流電源、２：スイッチ、３：コイル、８；信
号発生器、９；サージアブソーバ、１０：フライホイー
ルダイオード、ｌｌ：ｉｔのトランジスタ、’ １２
： ｆＡ ２のトランジスタ、】３；ツェナーダイオー
ド、１５：サイリスク。Figures M1 to 3 are circuit diagrams showing conventional devices, respectively;
4 to 6 are circuit diagrams showing different embodiments of the present invention, and FIGS. 7 to 9 are waveform diagrams for explaining the operation, respectively. 1: Single-phase AC power supply, 2: Switch, 3: Coil, 8: Signal generator, 9: Surge absorber, 10: Flywheel diode, ll: IT transistor, ' 12
: Transistor of fA 2, ]3; Zener diode, 15: Cyrisk.
Claims (1)
間中導通常態に保たれる第１のトランジスタ、この第１
のトランジスタとサージアブソーバとの並列回路にフラ
イホイールダイオードが直列接続された回路に並列に接
続された電磁石装置のコイル、このコイルに直列接続さ
れた第２のトランジスタおよび第２のトランジスタを制
御し、かつ電磁石装置の吸着に必要な所定の時間幅を有
する投入パルス信号とこの所定の時間幅を有する投入パ
ルス信号が消滅してから一定周期にて発生するパルス信
号とを送出する信号発生器を具えてなる電磁石装置のコ
イル駆動回路。1) A first transistor that is kept in a conductive state during the period from when the switch for switching on and off the power supply voltage is turned on to when it is released;
A coil of an electromagnetic device connected in parallel to a circuit in which a flywheel diode is connected in series to a parallel circuit of a transistor and a surge absorber, a second transistor connected in series to this coil, and a second transistor; and a signal generator that sends out a closing pulse signal having a predetermined time width necessary for attracting the electromagnetic device and a pulse signal generated at a constant period after the closing pulse signal having the prescribed time width disappears. Coil drive circuit for electromagnet device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5479583A JPS59181004A (en) | 1983-03-30 | 1983-03-30 | Driving circuit for coil of electromagnet device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5479583A JPS59181004A (en) | 1983-03-30 | 1983-03-30 | Driving circuit for coil of electromagnet device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59181004A true JPS59181004A (en) | 1984-10-15 |
Family
ID=12980685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5479583A Pending JPS59181004A (en) | 1983-03-30 | 1983-03-30 | Driving circuit for coil of electromagnet device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59181004A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6362305A (en) * | 1986-09-03 | 1988-03-18 | Hitachi Ltd | Coil exciting circuit |
| JPS63132406A (en) * | 1986-11-21 | 1988-06-04 | Fuji Electric Co Ltd | Electromagnet driving device |
| JPS63158818A (en) * | 1986-12-23 | 1988-07-01 | Fuji Electric Co Ltd | Electromagnet driving equipment |
| JPS63246805A (en) * | 1987-04-02 | 1988-10-13 | Fuji Electric Co Ltd | Electromagnet driving apparatus |
| JPS63246804A (en) * | 1987-04-02 | 1988-10-13 | Fuji Electric Co Ltd | Electromagnet driving apparatus |
| JPH01132108A (en) * | 1987-08-05 | 1989-05-24 | Toshiba Corp | Driving device for coil of electromagnet |
| US4878147A (en) * | 1987-08-05 | 1989-10-31 | Kabushiki Kaisha Toshiba | Electromagnetic coil drive device |
| EP0727566A2 (en) * | 1995-02-15 | 1996-08-21 | Toyota Jidosha Kabushiki Kaisha | A valve driving apparatus using an electromagnetic coil to move a valve body with reduced noise |
| WO2012157174A1 (en) * | 2011-05-19 | 2012-11-22 | 富士電機機器制御株式会社 | Electromagnetic contactor |
| WO2011038969A3 (en) * | 2009-09-29 | 2013-04-18 | Siemens Aktiengesellschaft | Free-wheeling circuit |
| EP2747287A1 (en) * | 2012-12-18 | 2014-06-25 | Siemens Aktiengesellschaft | Circuit arrangement for braking a moving mass by switching off an electromechanical switching device with an inductive load |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50116950A (en) * | 1974-02-28 | 1975-09-12 | ||
| JPS5578508A (en) * | 1978-12-11 | 1980-06-13 | Aisin Seiki Co Ltd | Excitation control circuit for electromagnet coil |
-
1983
- 1983-03-30 JP JP5479583A patent/JPS59181004A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50116950A (en) * | 1974-02-28 | 1975-09-12 | ||
| JPS5578508A (en) * | 1978-12-11 | 1980-06-13 | Aisin Seiki Co Ltd | Excitation control circuit for electromagnet coil |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6362305A (en) * | 1986-09-03 | 1988-03-18 | Hitachi Ltd | Coil exciting circuit |
| JPS63132406A (en) * | 1986-11-21 | 1988-06-04 | Fuji Electric Co Ltd | Electromagnet driving device |
| JPS63158818A (en) * | 1986-12-23 | 1988-07-01 | Fuji Electric Co Ltd | Electromagnet driving equipment |
| JPS63246805A (en) * | 1987-04-02 | 1988-10-13 | Fuji Electric Co Ltd | Electromagnet driving apparatus |
| JPS63246804A (en) * | 1987-04-02 | 1988-10-13 | Fuji Electric Co Ltd | Electromagnet driving apparatus |
| JPH0782941B2 (en) * | 1987-04-02 | 1995-09-06 | 富士電機株式会社 | Electromagnet drive |
| JPH01132108A (en) * | 1987-08-05 | 1989-05-24 | Toshiba Corp | Driving device for coil of electromagnet |
| US4878147A (en) * | 1987-08-05 | 1989-10-31 | Kabushiki Kaisha Toshiba | Electromagnetic coil drive device |
| EP0727566A2 (en) * | 1995-02-15 | 1996-08-21 | Toyota Jidosha Kabushiki Kaisha | A valve driving apparatus using an electromagnetic coil to move a valve body with reduced noise |
| EP0727566A3 (en) * | 1995-02-15 | 1996-10-16 | Toyota Motor Co Ltd | A valve driving apparatus using an electromagnetic coil to move a valve body with reduced noise |
| WO2011038969A3 (en) * | 2009-09-29 | 2013-04-18 | Siemens Aktiengesellschaft | Free-wheeling circuit |
| US8830649B2 (en) | 2009-09-29 | 2014-09-09 | Siemens Aktiengesellschaft | Free-wheeling circuit |
| WO2012157174A1 (en) * | 2011-05-19 | 2012-11-22 | 富士電機機器制御株式会社 | Electromagnetic contactor |
| JP2012243590A (en) * | 2011-05-19 | 2012-12-10 | Fuji Electric Fa Components & Systems Co Ltd | Electromagnetic contactor |
| CN103329236A (en) * | 2011-05-19 | 2013-09-25 | 富士电机机器制御株式会社 | Electromagnetic contactor |
| EP2711954A4 (en) * | 2011-05-19 | 2015-03-11 | Fuji Elec Fa Components & Sys | Electromagnetic contactor |
| US9048051B2 (en) | 2011-05-19 | 2015-06-02 | Fuji Electric Co., Ltd. | Electromagnetic contactor |
| EP2747287A1 (en) * | 2012-12-18 | 2014-06-25 | Siemens Aktiengesellschaft | Circuit arrangement for braking a moving mass by switching off an electromechanical switching device with an inductive load |
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