JPH021007Y2 - - Google Patents
Info
- Publication number
- JPH021007Y2 JPH021007Y2 JP9905183U JP9905183U JPH021007Y2 JP H021007 Y2 JPH021007 Y2 JP H021007Y2 JP 9905183 U JP9905183 U JP 9905183U JP 9905183 U JP9905183 U JP 9905183U JP H021007 Y2 JPH021007 Y2 JP H021007Y2
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- drive coil
- conductive
- drive
- power supply
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 15
- 229910052742 iron Inorganic materials 0.000 description 7
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Dot-Matrix Printers And Others (AREA)
- Relay Circuits (AREA)
Description
【考案の詳細な説明】
(A) 考案の技術分野
本考案は、コイル駆動回路装置、特に駆動コイ
ルの両端に発生するフライバツク電圧を急速かつ
強制的に減少させ、例えばプリンタのハンマ駆動
を高速化できるようにした駆動回路装置に関する
ものである。[Detailed Description of the Invention] (A) Technical Field of the Invention The present invention rapidly and forcibly reduces the flyback voltage generated across the coil drive circuit device, especially the drive coil, thereby speeding up the hammer drive of a printer, for example. The present invention relates to a drive circuit device that enables the following.
(B) 考案の背景と問題点
コイル駆動回路装置、例えばハンマ駆動などの
リレーにおいては、駆動コイルの両端に発生する
フライバツク電圧により駆動用トランジスタが破
損しないようにするとともにリレーの動作速度を
速めるために、フライバツク電圧を急速に減少さ
せる駆動回路装置が望まれている。(B) Background and problems of the invention In coil drive circuit devices, such as hammer drive relays, it is necessary to prevent the drive transistor from being damaged by the flyback voltage generated across the drive coil and to increase the operating speed of the relay. What is desired is a drive circuit arrangement that rapidly reduces flyback voltage.
従来、第１図に示すように鉄心１に巻かれた駆
動コイル３とバネ性をもつ可動鉄片２とからなる
リレーの駆動回路は、第２図に示すように、駆動
コイル３の１端を電源に接続し、他端をトランジ
スタ４を介して接地するとともに駆動コイル３の
両端子間にダイオードＤ（５−１）とツエナダイ
オードZD（５−２）とを逆直列にしたものを接続
した構成からなつている。トランジスタ４を導通
状態にした場合、駆動コイル３に電流ILが流れ、
第１図に示す可動鉄片２が離れる。一方、トラン
ジスタ４を導通状態から非導通状態にした場合、
駆動コイル３に逆起電圧、即ちフライバツク電圧
が発生する。このフライバツク電圧はダイオード
Ｄ（５−１）とツエナダイオードZD（５−２）と
を介して循環電流を流すことにより、徐々に低下
し、ダイオードＤ（５−１）の順方向電圧とツエ
ナダイオードZD（５−１）のツエナー電圧との和
になつたときに、循環電流が流れなくなり、第１
図に示す可動鉄片が吸着される。このように、フ
ライバツク電圧による駆動トランジスタ４の破損
を防止するために、単にダイオードＤ（５−１）
とツエナダイオードZD（５−２）とにより定まる
電圧値まで低下させる循環電流を流していたので
は、第１図に示す可動鉄片２を高速に動作させる
ことができない問題があつた。 Conventionally, a relay drive circuit consisting of a drive coil 3 wound around an iron core 1 and a movable iron piece 2 having spring properties as shown in FIG. It was connected to a power supply, the other end was grounded through a transistor 4, and a diode D (5-1) and a Zener diode ZD (5-2) connected in reverse series were connected between both terminals of the drive coil 3. It consists of a structure. When the transistor 4 is made conductive, a current I L flows through the drive coil 3,
The movable iron piece 2 shown in FIG. 1 is separated. On the other hand, when the transistor 4 is changed from a conductive state to a non-conductive state,
A back electromotive force, ie, a flyback voltage, is generated in the drive coil 3. This flyback voltage gradually decreases by flowing a circulating current through the diode D (5-1) and the Zener diode ZD (5-2), and the forward voltage of the diode D (5-1) and the Zener diode When it becomes the sum of the Zener voltage of ZD(5-1), the circulating current stops flowing and the first
The movable iron piece shown in the figure is attracted. In this way, in order to prevent damage to the drive transistor 4 due to flyback voltage, simply connect the diode D(5-1).
If a circulating current was passed to lower the voltage to a voltage determined by the zener diode ZD(5-2) and the zener diode ZD(5-2), there was a problem in that the movable iron piece 2 shown in FIG. 1 could not be operated at high speed.
(c) 考案の目的と構成
本考案は、駆動コイルの１端を夫々正電源およ
び負電源に接続するトランジスタと、駆動コイル
の他端を接地するトランジスタおよび正電源に接
続するフライバツク電圧消去用のツエナダイオー
ドとからなり、ツエナダイオードを介してフライ
バツク電圧による循環電流を流すとともに、正電
源と負電源との間に駆動コイルを接続して強制的
に電流を流し、フライバツク電圧を急激に低下さ
せることにより、高速に可動鉄片２を動作させる
ことを目的としている。そのため、本考案のコイ
ル駆動回路装置は、駆動コイルの１端を正電源に
接続する正電源用トランジスタおよび負電源に接
続する負電源用トランジスタと、前記駆動コイル
の他端を接地する接地用トランジスタおよび正電
源に接続するツエナダイオードとからなり、前記
駆動コイルに電流を流す場合に前記正電源用トラ
ンジスタおよび前記接地用トランジスタを導通状
態にし、前記駆動コイルに流れている電流を遮断
する場合に前記接地用トランジスタを非導通状態
にし、所定時間経過後に前記正電源用トランジス
タを非導通状態にするとともに前記負電源用トラ
ンジスタを所定時間導通状態にすることにより前
記駆動コイルに電流を流し、フライバツク電圧を
低下させるように構成したことを特徴としてい
る。(c) Purpose and structure of the invention The invention consists of a transistor that connects one end of the drive coil to a positive power source and a negative power source, a transistor that connects the other end of the drive coil to ground, and a flyback voltage canceling transistor that connects the other end of the drive coil to the positive power source. It consists of a Zener diode, and in addition to passing a circulating current due to the flyback voltage through the Zener diode, a drive coil is connected between the positive power supply and the negative power supply to force the current to flow, thereby rapidly reducing the flyback voltage. The purpose is to operate the movable iron piece 2 at high speed. Therefore, the coil drive circuit device of the present invention includes a positive power supply transistor that connects one end of the drive coil to a positive power supply, a negative power supply transistor that connects to the negative power supply, and a grounding transistor that grounds the other end of the drive coil. and a Zener diode connected to a positive power supply, and when a current flows through the drive coil, the positive power supply transistor and the grounding transistor are made conductive, and when the current flowing through the drive coil is interrupted, the The grounding transistor is made non-conductive, and after a predetermined period of time, the positive power source transistor is made non-conductive, and the negative power source transistor is made conductive for a predetermined period of time, thereby causing current to flow through the drive coil and increasing the flyback voltage. It is characterized by being configured to lower the
(D) 考案の実施例
以下に図面を参照して詳細に本考案を説明す
る。(D) Embodiments of the invention The invention will be explained in detail below with reference to the drawings.
第３図は本考案の１実施例を示し、第４図は第
３図図示回路の動作を説明する図を示す。図中、
３は駆動コイル、，，は制御信号の入力端
子である。 FIG. 3 shows one embodiment of the present invention, and FIG. 4 shows a diagram explaining the operation of the circuit shown in FIG. 3. In the figure,
3 is a drive coil, and , , are input terminals for control signals.
第３図において、駆動コイル３に電流を流す場
合、トランジスタTR１(6)およびトランジスタ
TR２(7)を導通状態にする信号（第４図および
）を夫々端子および端子に供給する。これ
により駆動コイル３に流れる電流ILは、第４図IL
に示すように駆動コイルのインダクタンスおよび
抵抗により定まる指数関数に従つて増大する。 In Fig. 3, when a current is passed through the drive coil 3, the transistor TR1(6) and the transistor
A signal (FIG. 4 and ) that makes TR2(7) conductive is applied to the terminal and the terminal, respectively. As a result, the current I L flowing through the drive coil 3 is as shown in Fig. 4 I L
As shown in , it increases according to an exponential function determined by the inductance and resistance of the drive coil.
一方、駆動コイル３に流れている電流を遮断す
る場合、トランジスタTR２(7)を非導通状態にす
べく信号（第４図）をオフする。これにより＋
Ｖ電源からの電流が駆動コイル３に供給されなく
なり、駆動コイル３に発生したフライバツク起電
力がツエナダイオード５−３およびトランジスタ
TR１(6)を介して指数関数的に減少する電流ILを
流し続ける。所定時間t0経過後、トランジスタ
TR１(6)を非導通状態にすべく信号（第４図）
をオフするとともに、トランジスタTR３(8)を導
通状態にする信号（第４図を端子に供給す
る。これにより＋Ｖ電源、ツエナダイオードZD
（５−３）、駆動コイルＬ(3)、トランジスタTR３
(8)および−Ｖ電源を介して電流が流れ、駆動コイ
ル３に貯えられたフライバツク起電力による電流
ILは短時間に減少する（第４図IL参照）。そして
所定時間t1経過後、トランジスタTR３(8)を非導
通状態にすべく信号（第４図）をオフする。こ
れにより、電流が駆動コイル３を流れなくなり、
第１図に示す可動鉄片２は、永久磁石に吸着され
る。 On the other hand, when cutting off the current flowing through the drive coil 3, the signal (FIG. 4) is turned off to make the transistor TR2(7) non-conductive. This results in +
Current from the V power source is no longer supplied to the drive coil 3, and the flyback electromotive force generated in the drive coil 3 is transferred to the Zener diode 5-3 and the transistor.
The exponentially decreasing current I L continues to flow through TR1(6). After the predetermined time t 0 has elapsed, the transistor
Signal to make TR1(6) non-conductive (Figure 4)
At the same time, a signal (Fig. 4) is supplied to the terminal to turn off the transistor TR3(8) and turn on the transistor TR3(8).
(5-3), drive coil L(3), transistor TR3
(8) A current flows through the -V power supply, and the current is caused by the flyback electromotive force stored in the drive coil 3.
I L decreases in a short time (see I L in Figure 4). After a predetermined time t1 has elapsed , the signal (FIG. 4) is turned off to make the transistor TR3(8) non-conductive. As a result, current no longer flows through the drive coil 3,
The movable iron piece 2 shown in FIG. 1 is attracted to a permanent magnet.
以上説明したように、第２図に示す従来の回路
装置のように、フライバツク電圧消去用のツエナ
ダイオードZD（５−２）およびダイオードＤ（５
−１）によつて、フライバツク起電力による電流
を減少させるのみでなく、本考案の回路装置で
は、更に最高電位である＋Ｖ電源から最低電位で
ある−Ｖ電源の間に駆動コイルを配置し、フライ
バツク起電力を減少させるように駆動コイルに強
制的に電流を流すため、短時間にフライバツク起
電力を減少させ、高速動作を可能とするものであ
る。例えば、第４図ILに示すように、従来はフラ
イバツク電圧消去のための時間T′を要したのに、
本考案の回路装置は時間Ｔと短縮される。 As explained above, as in the conventional circuit device shown in FIG.
In addition to reducing the current caused by the flyback electromotive force by -1), the circuit device of the present invention further disposes the drive coil between the +V power supply at the highest potential and the -V power supply at the lowest potential, Since current is forced to flow through the drive coil so as to reduce the flyback electromotive force, the flyback electromotive force is reduced in a short time and high-speed operation is possible. For example, as shown in FIG. 4 I L , conventionally it took time T' to erase the flyback voltage;
The circuit arrangement of the present invention reduces the time T.
尚、第４図ILに示す駆動コイル３に流れる電流
は、駆動コイル両端をツエナダイオードZD（５−
３）などを介して接続した場合に、零にする必要
はなく、スイツチング用のトランジスタTR１
(6)、TR２(7)あるいはTR３(8)などの素子が破損
しないフライバツク電圧値以下にすればよい。こ
の方が本考案のコイル駆動回路が動作する毎に駆
動コイルＬ(3)に貯えられる電磁エネルギを全て放
出することなく、電源利用率が高くなるととも
に、駆動コイルの高速動作が可能となる。 Note that the current flowing through the drive coil 3 shown in FIG .
3), etc., there is no need to set it to zero, and the switching transistor TR1
(6), TR2 (7) or TR3 (8) may be set below the flyback voltage value that will not damage the elements. This method does not release all the electromagnetic energy stored in the drive coil L(3) every time the coil drive circuit of the present invention operates, which increases the power utilization rate and enables high-speed operation of the drive coil.
また、第３図の実施例では、電源として零電位
を基準として＋Ｖ電源と−Ｖ電源を使用したけれ
ども、これに限ることなく、３つの状態の電位が
あればよい。 Further, in the embodiment shown in FIG. 3, +V power and -V power were used as power supplies with zero potential as a reference, but the present invention is not limited to this, and it is sufficient to have potentials in three states.
(E) 考案の効果
以上説明した如く、本考案の回路装置によれ
ば、駆動コイルに流れる電流を遮断する場合、駆
動コイルの両端に生じたフライバツク起電力によ
りツエナダイオードを介して循環電流を流すのみ
でなく、最高電位である＋Ｖ電源から最低電位で
ある−Ｖ電源の間に駆動コイルを配置し、フライ
バツク電圧を低下させるように駆動コイルに電流
を流すため、従来に比し、短時間にフライバツク
電圧を低下させることが可能となり、本考案の回
路装置を採用したリレーなどは高速動作をする効
果がある。(E) Effect of the invention As explained above, according to the circuit device of the invention, when the current flowing through the drive coil is interrupted, a circulating current is caused to flow through the Zener diode due to the flyback electromotive force generated at both ends of the drive coil. In addition, the drive coil is placed between the highest potential, +V power supply, and the lowest potential, -V power supply, and a current is passed through the drive coil to reduce the flyback voltage, which reduces the flyback voltage in a shorter time than before. It becomes possible to lower the flyback voltage, and relays and the like employing the circuit device of the present invention have the effect of operating at high speed.
第１図は駆動装置の例を示し、第２図は従来の
コイル駆動回路装置を示し、第３図は本考案の回
路装置の一実施例を示し、第４図は第３図図示回
路装置の動作を説明する図を示す。
図中、１は駆動装置、２は可動鉄片、３は駆動
コイル、５−２，５−３はツエナダイオード、
６，７，８はトランジスタ、Ｔは本考案に係るフ
ライバツク電圧消去時間、T′は従来の回路のフ
ライバツク電圧消去時間である。
FIG. 1 shows an example of a drive device, FIG. 2 shows a conventional coil drive circuit device, FIG. 3 shows an embodiment of the circuit device of the present invention, and FIG. 4 shows the circuit device shown in FIG. A diagram illustrating the operation of is shown. In the figure, 1 is a drive device, 2 is a moving iron piece, 3 is a drive coil, 5-2, 5-3 are Zener diodes,
6, 7, and 8 are transistors, T is the flyback voltage erasing time according to the present invention, and T' is the flyback voltage erasing time of the conventional circuit.
Claims (1)
トランジスタおよび負電源に接続する負電源用ト
ランジスタと、前記駆動コイルの他端を接地する
接地用トランジスタおよび正電源に接続するツエ
ナダイオードとからなり、前記駆動コイルに電流
を流す場合に前記正電源用トランジスタおよび前
記接地用トランジスタを導通状態にし、前記駆動
コイルに流れている電流を遮断する場合に前記接
地用トランジスタを非導通状態にし、所定時間経
過後に前記正電源用トランジスタを非導通状態に
するとともに前記負電源用トランジスタを所定時
間導通状態にすることにより前記駆動コイルに電
流を流し、フライバツク電圧を低下させるように
構成したことを特徴とするコイル駆動回路装置。 It consists of a positive power transistor that connects one end of the drive coil to a positive power source, a negative power transistor that connects to a negative power source, a grounding transistor that grounds the other end of the drive coil, and a Zener diode that connects to the positive power source. , the positive power supply transistor and the grounding transistor are made conductive when a current flows through the drive coil, the grounding transistor is made non-conductive when the current flowing through the drive coil is cut off, and the grounding transistor is made non-conductive for a predetermined period of time. After the time has elapsed, the positive power supply transistor is made non-conductive and the negative power supply transistor is made conductive for a predetermined period of time, thereby allowing current to flow through the drive coil and reducing the flyback voltage. Coil drive circuit device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9905183U JPS607142U (en) | 1983-06-27 | 1983-06-27 | Coil drive circuit device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9905183U JPS607142U (en) | 1983-06-27 | 1983-06-27 | Coil drive circuit device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS607142U JPS607142U (en) | 1985-01-18 |
| JPH021007Y2 true JPH021007Y2 (en) | 1990-01-11 |
Family
ID=30234901
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9905183U Granted JPS607142U (en) | 1983-06-27 | 1983-06-27 | Coil drive circuit device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS607142U (en) |
-
1983
- 1983-06-27 JP JP9905183U patent/JPS607142U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS607142U (en) | 1985-01-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS5821405B2 (en) | Denji Coil Youkudo Cairo | |
| JPS60187006A (en) | Drive circuit | |
| JPH04504942A (en) | Dual current sensing driver circuit | |
| US5304863A (en) | Transformer driver having unlimited duty cycle capability by inserting narrow pulses during unlimited duty cycles | |
| US4933609A (en) | Dynamic control system for braking DC motors | |
| JPS60180032A (en) | Solenoid drive circuit | |
| EP0059326B1 (en) | A stepper motor drive circuit for synchronous switching of core winding | |
| JPS6249967B2 (en) | ||
| JPS61187304A (en) | Direct current electromagnet device | |
| US4620260A (en) | Circuit for driving solenoid | |
| DE112022005886T5 (en) | SYSTEMS AND METHODS FOR REDUCING INDUCED GROUND BOUNCE VOLTAGE IN MOTOR DRIVERS | |
| EP0418408B1 (en) | Method and circuit arrangement for controlling a semiconductor switch by using an inductive transformer | |
| US4066956A (en) | Semiconductor switch device having means for supplying control current to a control electrode | |
| US4067055A (en) | High-speed inductance driver | |
| JP3004540B2 (en) | Impact print head drive circuit | |
| JP2520526Y2 (en) | Solenoid drive circuit | |
| JP2542582B2 (en) | Inductance load drive circuit | |
| JPS6110995A (en) | Driving method of stepping motor | |
| RU2017328C1 (en) | E flip-flop | |
| CN116864346A (en) | Relay driving circuit and electronic equipment | |
| JPH0627926Y2 (en) | Drive circuit for electromagnet | |
| JPS5947801A (en) | Ferrite switch driving circuit | |
| JPS6176026A (en) | Preventive circuit for inrush current | |
| JP2508023Y2 (en) | Solenoid valve solenoid drive circuit | |
| JPS61100020A (en) | Drive circuit of fet |