JP2544215Y2 - Constant current circuit - Google Patents
Constant current circuitInfo
- Publication number
- JP2544215Y2 JP2544215Y2 JP16471688U JP16471688U JP2544215Y2 JP 2544215 Y2 JP2544215 Y2 JP 2544215Y2 JP 16471688 U JP16471688 U JP 16471688U JP 16471688 U JP16471688 U JP 16471688U JP 2544215 Y2 JP2544215 Y2 JP 2544215Y2
- Authority
- JP
- Japan
- Prior art keywords
- current
- constant
- circuit
- voltage
- resistor
- 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 - Lifetime
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- Control Of Voltage And Current In General (AREA)
- Control Of Electrical Variables (AREA)
- Continuous-Control Power Sources That Use Transistors (AREA)
Description
【考案の詳細な説明】 （イ）産業上の利用分野 この考案は遠隔制御装置の遠隔操作回路等に組込まれ
る定電流回路に関する。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a constant current circuit incorporated in a remote control circuit or the like of a remote control device.
（ロ）従来の技術 従来、遠隔制御装置では、例えば特開昭59-27390号公
報に開示されているように、直流電源及び電流検出回路
を有し、かつ、機器の制御を行う本体側制御回路と操作
部を有する遠隔操作回路とを２本のリモコン線で接続
し、操作部によるインピーダンス変化によってリモコン
線を流れる電流を制御し、その電流値を本体側制御回路
で検出することにより、機器の発停や運転状態を制御す
るものが知られている。(B) Conventional technology Conventionally, as disclosed in Japanese Patent Application Laid-Open No. 59-27390, for example, a remote control device has a DC power supply and a current detection circuit, and furthermore, a main body side control for controlling devices. The circuit is connected to a remote control circuit having an operation unit by two remote control lines, the current flowing through the remote control line is controlled by the impedance change by the operation unit, and the current value is detected by the control circuit on the main unit side. There are known devices that control the start / stop and operating state of the vehicle.
ところで、上述した遠隔制御装置では、本体側制御回
路の直流電源の電圧が変化すると、それに伴ってリモコ
ン線を流れる電流が変化するため、操作部による操作が
正確に行えなくなったり、電流の変化による影響度が小
さくなるように全体の電流を大きくしなければならなか
った。By the way, in the above-described remote control device, when the voltage of the DC power supply of the main body side control circuit changes, the current flowing through the remote control line changes with the change. The overall current had to be increased so as to reduce the influence.
そこで、上述した電圧の変化に伴う電流の変化を緩和
するために、従来の遠隔制御装置では遠隔操作回路に定
電流回路が組込まれている。第３図において、（１）は
直流電源、（２）は電圧発生回路及び電流検出回路等を
内蔵した本体側制御回路、（４）は遠隔操作回路、
（５）（６）は電源線及び伝送線を兼ねる２本のリモコ
ン線である。遠隔操作回路（４）はリモコン線（５）
（６）に接続された母線、（７）（８）と、母線（７）
に挿入された運転スイッチ（９）と、母線（７）（８）
間に接続された定電流回路（10）及び運転ランプ（11）
とで構成されている。定電流回路（10）は母線（７）
（８）間に直列接続された抵抗（11）及び定電圧素子
（12）と、定電圧素子（12）に並列接続された抵抗（1
3）、摺動抵抗（14）及び抵抗（15）の直列回路と、母
線（７）（８）にそれぞれ電源端子（161）（162）が接
続された演算増幅器（16）と、演算増幅器（16）の出力
端子（163）と母線（７）との間に接続された抵抗（1
7）とからなり、演算増幅器（16）のプラス側入力端子
（164）は摺動抵抗（14）の摺動接点（141）に接続さ
れ、マイナス側入力端子（165）は出力端子（163）に接
続されている。Therefore, in order to alleviate the above-mentioned change in current caused by the change in voltage, a constant current circuit is incorporated in a remote control circuit in a conventional remote control device. In FIG. 3, (1) is a DC power supply, (2) is a main body side control circuit including a voltage generation circuit and a current detection circuit, etc., (4) is a remote control circuit,
(5) and (6) are two remote control lines which also serve as a power supply line and a transmission line. Remote control circuit (4) is remote control line (5)
A bus connected to (6), (7) (8) and a bus (7)
Operation switch (9) inserted in the bus, and buses (7) (8)
Constant current circuit (10) and operation lamp (11) connected between
It is composed of The constant current circuit (10) is a bus (7)
(8) A resistor (11) and a constant voltage element (12) connected in series between the resistor (1) and a resistor (1) connected in parallel to the constant voltage element (12).
3), a series circuit of a sliding resistance (14) and a resistance (15), an operational amplifier (16) in which power supply terminals (161) and (162) are connected to buses (7) and (8), respectively, and an operational amplifier ( 16) The resistor (1) connected between the output terminal (163) and the bus (7)
The positive input terminal (164) of the operational amplifier (16) is connected to the sliding contact (141) of the sliding resistor (14), and the negative input terminal (165) is the output terminal (163). It is connected to the.
上述した遠隔制御装置では運転スイッチ（９）を投入
すると、本体側制御回路（２）の出力電圧VDがリモコン
線（５）（６）を介して母線（７）（８）間に供給さ
れ、運転ランプ（11）が点灯するとともに、リモコン線
（６）から流入する電流Ｉ′Ｔが本体側制御回路（２）
で検出され、本体側制御回路（２）が機器（例えば温水
ボイラ等の熱機器や、空気調和機）を運転させる。ま
た、摺動抵抗（14）の摺動接点（141）の位置に応じて
演算増幅器（16）のプラス側入力端子（164）の電圧
Ｖ′Ｂが変化し、その出力側の抵抗（17）には電圧Ｖ′
Ｂに応じた定電流Ｉ′Ｏが流れるため、リモコン線
（８）の電流Ｉ′Ｔが変化し、本体側制御回路（４）で
はその電流値に応じた機器の運転状態の制御（例えば温
度制御）が行われる。When in the above-described remote control device turning on the operation switch (9), is provided between the main body control circuit (2) of the output voltage V D is the remote control line (5) bus via a (6) (7) (8) , The operation lamp (11) is turned on, and the current I ′ T flowing from the remote control line (6) is supplied to the main body side control circuit (2).
And the main body side control circuit (2) operates a device (for example, a heat device such as a hot water boiler or an air conditioner). Further, positive voltage V 'B changes the input terminal (164), of the output-side resistor of the operational amplifier (16) depending on the position of the sliding contact (141) of the sliding resistance (14) (17) Has a voltage V '
'Since the O flows, the current I of the remote control line (8)' the constant current I corresponding to B is T changes, the main body control circuit (4) the control of the operating state of the device corresponding to the current value thereof (e.g., temperature Control) is performed.
（ハ）考案が解決しようとする課題 上述した遠隔操作回路（４）の定電流回路（10）では
電圧VDの変化に対して抵抗（15）を流れる電流Ｉ′Ｂと
抵抗（17）を流れる電流Ｉ′Ｏを一定にすることができ
るものの、定電圧素子（12）を流れる電流Ｉ′ZD、演算
増幅器（16）の内部消費電流Ｉ′Ｃ、及び運転ランプ
（11）の電流Ｉ′Ｌを一定にすることができないため、
全体としては定電流が得られず、信頼性が低い欠点があ
った。(C) resistance and current I 'B flowing resistance (15) with respect to the change of the constant current circuit (10) the voltage V D of the remote control circuit devised the problems described above to be solved (4) (17) 'although it is possible to make O constant, the current I flowing through the constant voltage element (12)' the current I flowing ZD, internal current consumption I of the operational amplifier (16) 'C, and operating the lamp (11) of the current I' Since L cannot be constant,
As a whole, a constant current could not be obtained and there was a drawback that reliability was low.
この考案は上述した事実に鑑みてなされたものであ
り、電源電圧の変化や回路部品のバラツキ、さらには温
度変化に対して優れた定電流特性が得られる定電流回路
を提供することを目的とする。The present invention has been made in view of the above-described facts, and has as its object to provide a constant current circuit that can obtain excellent constant current characteristics with respect to changes in power supply voltage and variations in circuit components, and even temperature changes. I do.
（ニ）課題を解決するための手段 この考案では直流電圧が供給される２本の母線と、こ
れらの母線間に接続された定電圧素子及び演算増幅器
と、前記母線のうち一方の母線に挿入され、少なくとも
定電圧素子の電流と演算増幅器の内部消費電流及び出力
電流とが流れる抵抗と、この抵抗に発生する電圧を演算
増幅器に帰還する帰還回路とを備え、帰還電圧と定電圧
素子から得られた定電圧とが比較され、前記抵抗に発生
する電圧が一定になるように構成した。(D) Means for Solving the Problems In the present invention, two buses to which a DC voltage is supplied, a constant voltage element and an operational amplifier connected between these buses, and inserted into one of the buses A resistor through which at least the current of the constant voltage element, the internal consumption current and the output current of the operational amplifier flow, and a feedback circuit that feeds back the voltage generated at the resistor to the operational amplifier. The obtained constant voltage is compared with the constant voltage, and the voltage generated at the resistor is made constant.
（ホ）作用 このように構成すると、電源電圧の変化に伴って、定
電圧素子を流れる電流や演算増幅器の内部消費電流が変
化しても、その変化分を補うように演算増幅器の出力電
流が増減されるため、全体としての電流変化は殆ど無
い。また、回路部品のバラツキや温度変化による演算増
幅器の内部消費電流の変化も補償されるなど、安定した
定電流動作が行われる。(E) Function With this configuration, even if the current flowing through the constant voltage element or the internal current consumption of the operational amplifier changes with the change of the power supply voltage, the output current of the operational amplifier is compensated for the change. Since it is increased or decreased, there is almost no change in current as a whole. Further, a stable constant current operation is performed, for example, a change in internal current consumption of the operational amplifier due to a variation in circuit components and a change in temperature is compensated.
（ヘ）実施例 以下、この考案を図面に示す実施例について説明す
る。(F) Embodiment An embodiment of the present invention shown in the drawings will be described below.
第１図はこの考案の一実施例を示す定電流回路を示す
ものであり、第３図の定電流回路と共通する部分には同
一符号が付されている。FIG. 1 shows a constant current circuit showing one embodiment of the present invention, and the same reference numerals are given to parts common to the constant current circuit of FIG.
この実施例では母線（８）に、定電圧素子（12）に流
れる電流IZDと演算増幅器（16）の内部消費電流IC及び
出力電流IOと運転ランプの電流ILとが流れる抵抗（18）
を挿入してある。また、定電圧素子（12）と抵抗（18）
との接続点を演算増幅器（16）のマイナス側入力端子
（165）に接続するとともに、抵抗（18）の他端を抵抗
（15）を介して演算増幅器（16）のプラス側入力端子
（164）に接続してある。The bus (8) in this embodiment, the internal consumption current I C and the output current I O and the current I L and the flow resistance of the operating lamp to flow current I ZD operational amplifier constant voltage element (12) (16) ( 18)
Has been inserted. In addition, constant voltage element (12) and resistor (18)
Is connected to the negative input terminal (165) of the operational amplifier (16), and the other end of the resistor (18) is connected to the positive input terminal (164) of the operational amplifier (16) via the resistor (15). ).
上述した実施例の定電流回路では抵抗（18）に発生し
た電圧が抵抗（15）を介して演算増幅器（16）に帰還さ
れ、この電圧が定電圧素子（12）によって得られた電圧
と比較され、抵抗（18）の発生電圧が一定になる働きが
ある。すなわち、抵抗（15）（18）の電圧降下が等しく
なり、VB＝VA＝一定となるように定電流回路は動作す
る。このため、電源電圧VDが変化し、定電圧素子（12）
を流れる電流IZDや演算増幅器（16）の内部消費電流IC
や運転ランプ電流ILが変化しても、その変化分を補うべ
く出力電流IOが増減して抵抗（18）を流れる電流IXが一
定になる。また、抵抗（15）を流れる電流は小さくで
き、電圧変化による影響も殆どないので、全体の電流IT
は電圧変化に拘らず一定になる。しかも、回路部品のバ
ラツキや温度変化によって抵抗（18）を流れる電流が変
化しても、同様に出力電流IOによって補償され、電流IT
が一定になるなど、温度特性も良好である。In the constant current circuit of the embodiment described above, the voltage generated at the resistor (18) is fed back to the operational amplifier (16) via the resistor (15), and this voltage is compared with the voltage obtained by the constant voltage element (12). This has the function of making the voltage generated by the resistor (18) constant. That is, the constant current circuit operates so that the voltage drops of the resistors (15) and (18) become equal and V B = V A = constant. Therefore, the power supply voltage V D is changed, a constant voltage element (12)
Current I ZD flowing through the circuit and the internal consumption current I C of the operational amplifier (16)
And operating the lamp current be I L is varied, the current I X flowing through the resistor and the output current I O is increased or decreased to compensate for the variation (18) is constant. The resistance (15) can be reduced, the current flowing through, since almost no influence of the voltage change, the total current I T
Becomes constant regardless of the voltage change. In addition, even if the current flowing through the resistor (18) changes due to variations in circuit components or changes in temperature, the current is similarly compensated by the output current IO and the current IT
And the temperature characteristics are good, for example, is constant.
第２図は上述した定電流回路を温水ボイラの遠隔制御
装置に応用したものであり、第１図及び第３図と共通す
る部分には同一符号が付されている。第２図では運転ラ
ンプ（11）と並列に定電圧素子（19）及び燃焼ランプ
（20）の直列回路が設けられている。FIG. 2 shows an application of the above-described constant current circuit to a remote control device for a hot water boiler, and the same reference numerals are given to the parts common to FIG. 1 and FIG. In FIG. 2, a series circuit of a constant voltage element (19) and a combustion lamp (20) is provided in parallel with the operation lamp (11).
この実施例では運転スイッチ（９）が投入されると、
リモコン線（６）に電流ITが流れ、本体側制御回路
（２）は温水ボイラを運転させる。また、出力電圧VDを
5Vとし、運転ランプ（11）を点灯させる。温水ボイラの
温水温度が摺動抵抗（14）にて設定された温度より低い
とき、本体側制御回路（２）はバーナを作動させるとと
もに、出力電圧VDを12Vにする。このとき、燃焼ランプ
（20）は定電圧素子（19）を介して電流が流れ、点灯す
る。このように、本体側制御回路（２）からリモコン線
（５）（６）を介して遠隔操作回路（４）に供給される
電圧VDが変化し、定電圧素子（12）の電流、演算増幅器
（16）の内部消費電流、運転ランプ（11）及び燃焼ラン
プ（20）の電流などが変化しても、リモコン線（６）の
電流ITは摺動抵抗（14）の操作位置で決まる一定電流に
なり、回路部品のバラツキや温度変化による影響も殆ど
ない。In this embodiment, when the operation switch (9) is turned on,
A current I T flows to the remote control line (6), the main body control circuit (2) is to operate the hot water boiler. Also, the output voltage V D
5V, and turn on the operation lamp (11). When the hot water temperature of the hot water boiler is lower than the temperature set by the sliding resistance (14), the main body control circuit (2) together with operating the burner, the output voltage V D to 12V. At this time, a current flows through the combustion lamp (20) via the constant voltage element (19), and the combustion lamp (20) is turned on. Thus, current remote control line from the main body control circuit (2) (5) through (6) voltage V D supplied to the remote operation circuit (4) is changed, the constant voltage element (12), computing internal current consumption of the amplifier (16), even if such a current operating lamp (11) and combustion lamp (20) is changed, the current I T of the remote control line (6) is determined by the operating position of the sliding resistance (14) The current becomes constant, and there is almost no influence from variations in circuit components and changes in temperature.
（ト）考案の効果 この考案は以上のように構成されているので、電源電
圧が変化したり、回路部品にバラツキがあっても、常に
一定の電流を流すことができ、温度特性も優れているな
ど、従来の回路と殆ど同一の部品で、バラツキの極めて
少ない、安定した定電流特性を得ることができるもので
あり、特に、本体側制御回路と遠隔操作回路とが電源線
及び伝送線を兼ねる２本のリモコン線で接続された遠隔
制御装置に最適である。(G) Effect of the invention Since the invention is configured as described above, a constant current can always flow even if the power supply voltage changes or the circuit components vary, and the temperature characteristics are excellent. It is possible to obtain stable and constant current characteristics with very little variation using almost the same components as the conventional circuit.In particular, the main unit side control circuit and the remote operation circuit connect the power supply line and the transmission line. It is most suitable for a remote control device connected by two remote control lines that also serve as the remote controller.
第１図はこの考案の一実施例を示す定電流回路の電気回
路図、第２図はこの考案の応用例を示す遠隔制御装置の
電気回路図、第３図は従来例を示す電気回路図である。 （７）（８）……母線、（12）……定電圧素子、（16）
……演算増幅器、（15）……抵抗（帰還回路）、（18）
……抵抗。1 is an electric circuit diagram of a constant current circuit showing an embodiment of the present invention, FIG. 2 is an electric circuit diagram of a remote control device showing an application example of the present invention, and FIG. 3 is an electric circuit diagram showing a conventional example. It is. (7) (8) ... bus, (12) ... constant voltage element, (16)
…… Operational amplifier, (15) …… Resistance (feedback circuit), (18)
……resistance.
Claims (1)
らの母線間に接続された定電圧素子及び演算増幅器と、
前記母線のうち一方の母線に挿入され、少なくとも前記
定電圧素子の電流と前記演算増幅器の内部消費電流及び
出力電流とが流れる抵抗と、この抵抗に発生する電圧を
前記演算増幅器に帰還する帰還回路とを備え、帰還電圧
と定電圧素子から得られた定電圧とが比較され、前記抵
抗に発生する電圧が一定になるように構成したことを特
徴とする定電流回路。1. A system comprising: two buses to which a DC voltage is supplied; a constant voltage element and an operational amplifier connected between these buses;
A resistor that is inserted into one of the buses and through which at least the current of the constant voltage element, the internal current consumption and the output current of the operational amplifier flows, and a feedback circuit that feeds back the voltage generated at the resistor to the operational amplifier Wherein the feedback voltage is compared with a constant voltage obtained from a constant voltage element, and the voltage generated at the resistor is made constant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16471688U JP2544215Y2 (en) | 1988-12-20 | 1988-12-20 | Constant current circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16471688U JP2544215Y2 (en) | 1988-12-20 | 1988-12-20 | Constant current circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0284926U JPH0284926U (en) | 1990-07-03 |
| JP2544215Y2 true JP2544215Y2 (en) | 1997-08-13 |
Family
ID=31450562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16471688U Expired - Lifetime JP2544215Y2 (en) | 1988-12-20 | 1988-12-20 | Constant current circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2544215Y2 (en) |
-
1988
- 1988-12-20 JP JP16471688U patent/JP2544215Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0284926U (en) | 1990-07-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |