JPS5850003A - Load driving circuit - Google Patents
Load driving circuitInfo
- Publication number
- JPS5850003A JPS5850003A JP56148575A JP14857581A JPS5850003A JP S5850003 A JPS5850003 A JP S5850003A JP 56148575 A JP56148575 A JP 56148575A JP 14857581 A JP14857581 A JP 14857581A JP S5850003 A JPS5850003 A JP S5850003A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- valve
- converter
- relay
- output
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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
- H01H47/002—Monitoring or fail-safe circuits
Landscapes
- Regulation And Control Of Combustion (AREA)
- Safety Devices In Control Systems (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は燃焼機器等における燃焼制御装置に関するもの
で、特に安全性の向上を図った負荷駆動回路を提供する
ことを目的とする。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a combustion control device for combustion equipment, etc., and particularly aims to provide a load drive circuit with improved safety.
第１図は従来の燃焼制御装置に於ける負荷駆動回路でそ
の動作は制御信号Ｓｏによってオン、オフするトランジ
スタＴＲでトランスＴを励磁し、その出力をダイオード
Ｄ１とコンデンサＣで平滑したｖ１電圧を電磁弁等の電
荷りに供給するものであるが、第２図に示すように、電
磁弁りの開放保持電圧ＶＳと開放電圧７０間のヒステリ
シス電圧で駆動するものでは電磁弁Ｌｔ７）開放電圧Ｖ
Ｏを得るために初期時、電源ＶＢをスイッチ９ｗとダイ
オードＤ２を介して重畳する。スイッチＢｗをオンする
と電磁弁りの端子電圧がｖｌからｖｐに達して開放し、
スイッチＢｗのオフによりて再びｖｙ電圧に復帰しても
電磁弁りは開放保持するものであるが、スイッチＢｗが
短絡故障すると、制御信号ＳＣに関係なく電磁弁りが開
放するため燃料の流出が起シ極めて不安全になシ得る。Figure 1 shows a load drive circuit in a conventional combustion control device. Its operation is such that a transformer T is excited by a transistor TR that is turned on and off by a control signal So, and the output is smoothed by a diode D1 and a capacitor C to generate a voltage v1. This supplies electrical charge to solenoid valves, etc., but as shown in Figure 2, in the case of a solenoid valve driven by a hysteresis voltage between the open holding voltage VS and the open voltage 70, the solenoid valve Lt7) open voltage V
In order to obtain O, at the initial stage, the power supply VB is superimposed via the switch 9w and the diode D2. When switch Bw is turned on, the terminal voltage of the solenoid valve reaches vp from vl and opens.
Even if the voltage is restored to vy by turning off the switch Bw, the solenoid valve remains open. However, if the switch Bw has a short-circuit failure, the solenoid valve will open regardless of the control signal SC, preventing fuel from flowing out. This can be extremely unsafe.
またスイッチＢｗを手動で操作するものに於ては機器の
自動運転、遠隔操作が困難になる等の問題があった。Further, in the case where the switch Bw is operated manually, there are problems such as making it difficult to automatically operate the device or remotely control the device.
本発明は上記の点に鑑み、電磁弁りに重畳する電圧を接
点ロジックで構成し、自動運転、遠隔操作を容易に行え
、極めて安全性の高い負荷駆動回路を実現したものであ
る。In view of the above points, the present invention has realized a highly safe load drive circuit that can easily perform automatic operation and remote control by configuring the voltage superimposed on the electromagnetic valve using contact logic.
以下、本発明をその一実施例を示す図面に基づいて説明
する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained below based on drawings showing one embodiment thereof.
第３図は本発明に於ける負荷駆動回路のシステム構成図
であシ、Ａは発振器、Ｓｏは制御信号電圧で、比較器Ｂ
とリレーＲに印加される、比較器Ｂの出力はＤＣ−ＤＣ
コンバータＦに入力される。FIG. 3 is a system configuration diagram of the load driving circuit in the present invention, where A is the oscillator, So is the control signal voltage, and the comparator B
and applied to relay R, the output of comparator B is DC-DC
It is input to converter F.
ＤＣ−ＤＣコンバータＦの出力端子に負荷りとリレーＲ
の常開接点Ｒ３を接続する。 リレーＲの常閉接点Ｒ２
は電源ＶＢに、共通端子Ｒ１はコンデンサＣに接続する
。Load and relay R are applied to the output terminal of DC-DC converter F.
Connect the normally open contact R3. Normally closed contact R2 of relay R
is connected to the power supply VB, and the common terminal R1 is connected to the capacitor C.
上記構成でその動作を第４図の図とともに説明する。発
振器ＡはｆＯなる周波数で発振し、出力電圧はＥＡ電圧
を一下限値として比較器Ｂに入力される。The operation of the above configuration will be explained with reference to the diagram in FIG. Oscillator A oscillates at a frequency fO, and the output voltage is input to comparator B with the EA voltage as one lower limit.
比較器Ｂは制御信号電圧ＳＯと前記発振器Ａの出力電圧
を比較する、制御信号電圧ＳＯがＱ（Ｖ）の時、比較器
Ｂの出力は前記発振器Ａの出力を伝達せず、ＤＣ−ＤＣ
コンバータＦは静止する。よってコンデンサＣはリレー
Ｒの常閉端子Ｒ２と共通端子Ｒ１を介して電源ＶＢが充
電され待機する。次に制御信号電圧ＳＯをｔＯ刻で印加
すると比較器Ｂは発振器Ａの出力電圧ＥＡを越えた時点
よ多出力ＥＢをＤＣ−ＤＣコンバータＦに入力し能動域
にセットする。そして制御信号電圧ＳＯがＥＲに切換わ
る。Comparator B compares the control signal voltage SO with the output voltage of the oscillator A. When the control signal voltage SO is Q (V), the output of the comparator B does not transmit the output of the oscillator A, and is DC-DC.
Converter F is stationary. Therefore, the capacitor C is charged with the power supply VB via the normally closed terminal R2 of the relay R and the common terminal R1, and is on standby. Next, when the control signal voltage SO is applied at tO intervals, the comparator B inputs the multi-output EB to the DC-DC converter F and sets it in the active region at the time when the output voltage EA of the oscillator A is exceeded. Then, the control signal voltage SO is switched to ER.
この時電磁弁りにはコンデンサＣの電荷が放出され、電
磁弁りは開放電圧ｖＯを越すＶｐ電圧が印加して開放保
持する。コンデンサＣと電磁弁りの抵抗による放電時定
数は十分な様に選択することは言うまでもない。そして
コンデンサＣは電磁弁りと並列接続状態となシ前記ＤＣ
−ＤＣコンバータ出力の平滑コンデンサとして作男し、
開放保持電圧Ｖｓを越える電圧を維持する。At this time, the charge of the capacitor C is discharged to the solenoid valve, and a voltage Vp exceeding the open circuit voltage vO is applied to the solenoid valve to keep it open. It goes without saying that the discharge time constant due to the resistance of the capacitor C and the electromagnetic valve should be selected to be sufficient. The capacitor C is connected in parallel with the solenoid valve.
- Manufactured as a smoothing capacitor for DC converter output,
A voltage exceeding the open-circuit holding voltage Vs is maintained.
次にｔ１刻で制御信号電圧Ｂｏｆ停止するとリレー１．
！：ＤＣ−ＤＣコンバータＦがオフして電磁弁りを閉成
するのである。また前記リレーＲの共通端子が常開端子
Ｒ３と短絡故障した場合、初期起動時に印加する電磁弁
開放電圧ｖｐが得られないため電磁弁りは開放しない。Next, when the control signal voltage Bof stops at time t1, relay 1.
! :The DC-DC converter F is turned off and the solenoid valve is closed. Further, if the common terminal of the relay R is short-circuited to the normally open terminal R3, the solenoid valve will not open because the solenoid valve opening voltage vp applied at the initial start-up cannot be obtained.
逆にリレーＲがオンしない時は、電磁弁りの平滑コンデ
ンサが形成されず前記同様電磁弁りは開放しない。Conversely, when relay R is not turned on, the smoothing capacitor of the solenoid valve is not formed and the solenoid valve does not open as described above.
第６図は本発明の一実施例である具体回路を示す。FIG. 6 shows a specific circuit which is an embodiment of the present invention.
以上の様に本発明の負荷駆動回路によれば、ＤＣ−ＤＣ
コンバータの出力に接続された負荷に。As described above, according to the load driving circuit of the present invention, the DC-DC
to the load connected to the output of the converter.
リレー接点を介して接続されるコンデンサの電荷を重畳
し、しかも重畳後は平滑作用として負荷に対応するため
、リレー接点の故障に対する安全性が向上し、かつＤＣ
−ＤＣコンバータのトランクを小型化することができる
。また制御信号電圧によってＤＣ，−ＤＣコンバータが
起動しリレーが制御できるため自動運転や遠隔操作が可
能となる等の効果を奏する。The charges of the capacitors connected via the relay contacts are superimposed, and after the superposition, the load is handled as a smoothing action, improving safety against failures of the relay contacts, and reducing DC
- The trunk of the DC converter can be made smaller. Further, since the DC and -DC converters can be activated and the relays can be controlled by the control signal voltage, automatic operation and remote control are possible.
第１図は従来の負荷駆動回路の回路図、第２図は負荷駆
動波形図、第３図は本発明の一実施例の負荷駆動回路の
回路−、第４図は同負荷駆動回路Ａ・・・・・・発振器
、Ｂ・・・・・・比較器、Ｒ・・・・・・リレー、Ｆ・
・・・・・ＤＣ−ＤＣコンバータ、Ｌ・・・−・負荷、
ｃ・・・・・・コンデンサ、Ｓｏ・・・・・・制御信号
電圧。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名第２
５１
第３図
第４１１Fig. 1 is a circuit diagram of a conventional load driving circuit, Fig. 2 is a load driving waveform diagram, Fig. 3 is a circuit diagram of a load driving circuit according to an embodiment of the present invention, and Fig. 4 is a circuit diagram of the load driving circuit A. ...Oscillator, B ...Comparator, R ...Relay, F.
...DC-DC converter, L...--Load,
c... Capacitor, So... Control signal voltage. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
51 Figure 3 411
Claims (3)
発振器出力電圧と制御信号電圧を比較する比較器を備え
、前記比較器の出力でＤＣ−ＤＣコンバータを駆動する
と共に、前記リレー接点出力でＤＣ−ＤＣコンバータの
出力端子に接続された負荷にコンデンサの電荷を重畳す
る負荷駆動回路。(1) A relay excited by an oscillator and a control signal voltage, and a comparator for comparing the oscillator output voltage and the control signal voltage, and the output of the comparator drives a DC-DC converter, and the relay contact output drives a DC-DC converter. A load drive circuit that superimposes the charge of a capacitor on the load connected to the output terminal of a DC-DC converter.
電源、常開端子に負荷を接続してなる特許請求の範囲第
１項記載の負荷駆動回路。(2) A load drive circuit according to claim 1, in which a capacitor is connected to a common terminal of the relay, a power source is connected to a normally closed terminal, and a load is connected to a normally open terminal.
コンデンサとする特許請求の範囲第１項記載の負荷駆動
回路。(3) The load drive circuit according to claim 1, wherein the load smoothing capacitor is connected through the common terminal and the normally open terminal of the relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56148575A JPS5850003A (en) | 1981-09-18 | 1981-09-18 | Load driving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56148575A JPS5850003A (en) | 1981-09-18 | 1981-09-18 | Load driving circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5850003A true JPS5850003A (en) | 1983-03-24 |
| JPH0136121B2 JPH0136121B2 (en) | 1989-07-28 |
Family
ID=15455805
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56148575A Granted JPS5850003A (en) | 1981-09-18 | 1981-09-18 | Load driving circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5850003A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4821537U (en) * | 1971-07-20 | 1973-03-12 | ||
| JPS4845082U (en) * | 1971-10-04 | 1973-06-12 |
-
1981
- 1981-09-18 JP JP56148575A patent/JPS5850003A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4821537U (en) * | 1971-07-20 | 1973-03-12 | ||
| JPS4845082U (en) * | 1971-10-04 | 1973-06-12 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0136121B2 (en) | 1989-07-28 |
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