JPH0579850U - Relay temperature compensation circuit - Google Patents
Relay temperature compensation circuitInfo
- Publication number
- JPH0579850U JPH0579850U JP2601092U JP2601092U JPH0579850U JP H0579850 U JPH0579850 U JP H0579850U JP 2601092 U JP2601092 U JP 2601092U JP 2601092 U JP2601092 U JP 2601092U JP H0579850 U JPH0579850 U JP H0579850U
- Authority
- JP
- Japan
- Prior art keywords
- relay
- thermistor
- coil
- resistance
- 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.)
- Pending
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- Relay Circuits (AREA)
Abstract
(57)【要約】
【目的】 並列に接続されたサーミスタ３と抵抗４をリ
レー２に直列に接続することによりリレー２を安定に動
作させる。
【構成】 リレー駆動回路１で駆動され、コイル２Ａに
流れる電流によりリレー接点２Ｂが接断されるリレー２
に対し、並列に接続されたサーミスタ３と抵抗４をリレ
ー２に直列に接続する。
(57) [Summary] [Purpose] The relay 2 is stably operated by connecting the thermistor 3 and the resistor 4 connected in parallel to the relay 2 in series. [Structure] A relay 2 driven by a relay drive circuit 1, and a relay contact 2B is disconnected by a current flowing through a coil 2A.
On the other hand, the thermistor 3 and the resistor 4 connected in parallel are connected in series to the relay 2.
Description
【０００１】[0001]
この考案は、温度変化の大きい環境内のリレーを安定に動作させるリレーの温 度補償回路についてのものである。 The present invention relates to a temperature compensation circuit for a relay that stably operates the relay in an environment where the temperature changes greatly.
【０００２】[0002]
次に、従来技術によるリレー回路を図２により説明する。図２の１はリレー駆 動回路、２はリレーであり、リレー２はコイル２Ａとリレー接点２Ｂで構成され る。コイル２Ａの抵抗値をＲｃ、コイル２Ａの巻数をＮ、コイル２Ａに流れる電 流をＩｃとすれば、接点２Ｂの感動値はＩｃ×Ｎで決まる。コイル２Ａに供給さ れる電圧をＶとすれば、電流ＩｃはＶ÷Ｒｃで決まる。しかし、コイル２Ａの抵 抗値Ｒｃは、周囲温度の上昇により銅線の温度係数約 0.4％／℃だけ高くなる。 このため、温度がＴ℃上がれば、コイル電流Ｉｃ＝Ｖ÷Ｒｃ（１＋ 0.004×Ｔ） となり、コイル２Ａには十分な電流が流れず、接点２Ｂの感動値が温度により変 化し安定な動作ができない。 Next, a conventional relay circuit will be described with reference to FIG. 2 is a relay drive circuit, 2 is a relay, and the relay 2 is composed of a coil 2A and a relay contact 2B. When the resistance value of the coil 2A is Rc, the number of turns of the coil 2A is N, and the current flowing through the coil 2A is Ic, the moving value of the contact 2B is determined by Ic × N. If the voltage supplied to the coil 2A is V, the current Ic is determined by V / Rc. However, the resistance value Rc of the coil 2A increases by a temperature coefficient of about 0.4% / ° C. of the copper wire due to the increase in ambient temperature. Therefore, if the temperature rises by T ° C., the coil current Ic = V ÷ Rc (1 + 0.004 × T), the sufficient current does not flow through the coil 2A, and the moving value of the contact 2B changes depending on the temperature, so that stable operation can be achieved. Can not.
【０００３】[0003]
図２では、コイル２Ａの抵抗値Ｒｃの温度変化により、リレー接点２Ｂを駆動 するのに必要な電流を一定に保つことが困難である。この考案は、並列に接続さ れたサーミスタと抵抗をリレー２に直列に接続することにより温度変化を補償す るリレーの温度補償回路の提供を目的とする。 In FIG. 2, it is difficult to keep the current required to drive the relay contact 2B constant due to the temperature change of the resistance value Rc of the coil 2A. It is an object of the present invention to provide a temperature compensating circuit for a relay, in which a thermistor and a resistor connected in parallel are connected to the relay 2 in series to compensate for temperature change.
【０００４】[0004]
この目的を達成するため、この考案では、リレー駆動回路１で駆動され、コイ ル２Ａに流れる電流によりリレー接点２Ｂが接断されるリレー２に対し、並列に 接続されたサーミスタ３と抵抗４をリレー２に直列に接続する。 In order to achieve this object, in the present invention, a thermistor 3 and a resistor 4 connected in parallel are provided for a relay 2 which is driven by a relay drive circuit 1 and whose relay contact 2B is cut off by a current flowing through a coil 2A. Connect to relay 2 in series.
【０００５】[0005]
【作用】 次に、この考案によるリレーの温度補償回路の構成を図１により説明する。図 １の３はサーミスタ、４は抵抗であり、その他は図２と同じである。サーミスタ ３と抵抗４は並列に接続され、リレー２に直列に接続される。すなわち、図１は 図２のリレー２に対し、並列に接続されたサーミスタ３と抵抗４を直列に接続し たものである。並列に接続されたサーミスタ３と抵抗４は温度変化によるコイル ２Ａの抵抗増加を打ち消す作用をする。Next, the configuration of the temperature compensation circuit for the relay according to the present invention will be described with reference to FIG. In FIG. 1, 3 is a thermistor, 4 is a resistor, and the others are the same as in FIG. The thermistor 3 and the resistor 4 are connected in parallel and are connected in series to the relay 2. That is, FIG. 1 shows the relay 2 of FIG. 2 in which a thermistor 3 and a resistor 4 connected in parallel are connected in series. The thermistor 3 and the resistor 4 connected in parallel have a function of canceling out the increase in the resistance of the coil 2A due to the temperature change.
【０００６】 周囲温度が上昇すると、コイル２Ａの抵抗値Ｒｃは銅線の温度係数 0.4％／℃ 分だけ増加するが、サーミスタ３は温度上昇によって抵抗が下がるので、コイル ２Ａの抵抗値Ｒｃの増加分を打ち消す。抵抗４はサーミスタ３の抵抗減少を調整 するためのものであり、温度上昇を△Ｔとすると、各定数は次の式(1) 〜式(5) により決定する。[0006] When the ambient temperature rises, the resistance value Rc of the coil 2A increases by a temperature coefficient of 0.4% / ° C of the copper wire, but the resistance of the thermistor 3 decreases due to the temperature rise, so the resistance value Rc of the coil 2A increases. Cancel the minutes. The resistor 4 is for adjusting the resistance decrease of the thermistor 3. When the temperature rise is ΔT, each constant is determined by the following equations (1) to (5).
【０００７】 コイル２Ａの抵抗値Ｒｃ（ΔＴ）＝Ｒｃ（１＋βΔＴ）…………(1) サーミスタ３の抵抗値Ｒｓ（ΔＴ）＝Ｒｓ（１−γΔＴ）………(2) βはコイル２Ａの温度係数であり、γはサーミスタ３の温度係数である。 サーミスタ３と抵抗４の合成抵抗Ｚｔを次の式(3) とする。 抵抗Ｚｔ（ΔＴ）＝Ｚ（１−αΔＴ）……………………(3) ΔＴ℃の回路インピーダンス変動をなくすには、Ｚα＝Ｒｃβの関係から、次 の式(4) が成立するように、サーミスタ３の抵抗値Ｒｓを決める。 Ｒｓ＝γＺ（Ｚ／Ｒｃβ−ΔＴ）／（１−γΔＴ）………(4)Resistance value of the coil 2A Rc (ΔT) = Rc (1 + βΔT) (1) Resistance value of the thermistor 3 Rs (ΔT) = Rs (1-γΔT) (2) β is the coil 2A Is the temperature coefficient of the thermistor 3, and γ is the temperature coefficient of the thermistor 3. The combined resistance Zt of the thermistor 3 and the resistance 4 is given by the following equation (3). Resistance Zt (ΔT) = Z (1−αΔT) (3) To eliminate the circuit impedance fluctuation of ΔT ° C, the following formula (4) is established from the relationship of Zα = Rcβ. Thus, the resistance value Rs of the thermistor 3 is determined. Rs = γZ (Z / Rcβ-ΔT) / (1-γΔT) ... (4)
【０００８】 サーミスタ３の抵抗値Ｒｓが決まれば、抵抗４の抵抗値Ｒｒは、次の式(5) に より求められる。 抵抗４の抵抗値Ｒｒ＝Ｚ・Ｒｓ／（Ｒｓ−Ｚ）…………(5) サーミスタ３の抵抗値Ｒｓと抵抗４の抵抗値Ｒｒを式(4) と式(5) により決め ることにより、回路のインピーダンス変動はなくなり、リレー２を安定して動作 させることができる。Once the resistance value Rs of the thermistor 3 is determined, the resistance value Rr of the resistor 4 is obtained by the following equation (5). Resistance value of resistor 4 Rr = Z · Rs / (Rs−Z) (5) Determine the resistance value Rs of the thermistor 3 and the resistance value Rr of resistor 4 by the formula (4) and the formula (5). As a result, the impedance variation of the circuit is eliminated, and the relay 2 can be operated stably.
【０００９】[0009]
リレー２のコイル抵抗Ｒｃ＝ 160Ω、感動電圧 4Ｖとする。また、サーミスタ ３は、Ｂ定数が3500［Ｋ］のものを使用する。リレー駆動回路１から 5Ｖを供給 すると、Ｚ＝Ｒｒ・Ｒｓ／（Ｒｒ＋Ｒｓ）＝40Ωとなり、回路全体の抵抗は 200 Ωになる。 Coil resistance Rc of relay 2 = 160Ω, touching voltage 4V. The thermistor 3 has a B constant of 3500 [K]. When 5V is supplied from the relay drive circuit 1, Z = Rr.Rs / (Rr + Rs) = 40Ω, and the resistance of the entire circuit becomes 200Ω.
【００１０】 温度変化が△Ｔ＝20℃を基準として、温度25℃のときのサーミスタ３の抵抗Ｒ ｓ、抵抗４の抵抗値Ｒｒを式(4) 〜式(5) から求めると、Ｒｓ＝93Ω、Ｒｒ＝70 Ωになる。周囲温度が10℃上昇したときの回路の合成抵抗は、Ｒｓが式(1) から 68Ω、Ｒｃが式(2) から 166Ω、回路全体の合成抵抗は 200Ωになる。温度が20 ℃上昇したときは、Ｒｓ＝44Ω、Ｒｃ＝ 173Ω、回路全体の合成抵抗は 200Ωと なり、抵抗変動がなく、リレー２を安定に動作させることができる。When the resistance R s of the thermistor 3 and the resistance value Rr of the resistor 4 at the temperature of 25 ° C. are calculated from the equations (4) to (5) with reference to the temperature change of ΔT = 20 ° C., Rs = It becomes 93Ω and Rr = 70Ω. When the ambient temperature rises by 10 ° C, the combined resistance of the circuit is Rs = 68Ω from Eq. (1), Rc = 166Ω from Eq. (2), and the combined resistance of the entire circuit is 200Ω. When the temperature rises by 20 ° C., Rs = 44Ω, Rc = 173Ω, the combined resistance of the entire circuit becomes 200Ω, and there is no resistance fluctuation, and the relay 2 can be operated stably.
【００１１】[0011]
この考案によれば、サーミスタと抵抗でコイル抵抗の温度変化を打ち消し、イ ンピーダンス変動をなくすので、リレーを安定に動作させることができる。 According to this invention, the temperature change of the coil resistance is canceled by the thermistor and the resistance and the impedance fluctuation is eliminated, so that the relay can be operated stably.
【図１】この考案によるリレーの温度補償回路の構成図
である。FIG. 1 is a block diagram of a temperature compensation circuit for a relay according to the present invention.
【図２】従来技術によるリレー回路の構成図である。FIG. 2 is a configuration diagram of a relay circuit according to a conventional technique.
１ リレー駆動回路 ２ リレー ２Ａ リレー２のコイル ２Ｂ リレー２の接点 ３ サーミスタ ４ 抵抗 1 Relay drive circuit 2 Relay 2A Relay 2 coil 2B Relay 2 contact 3 Thermistor 4 Resistance
Claims (1)
(2A)に流れる電流によりリレー接点(2B)が接断されるリ
レー(2) に対し、 並列に接続されたサーミスタ(3) と抵抗(4) をリレー
(2) に直列に接続することを特徴とするリレーの温度補
償回路。1. A coil driven by a relay drive circuit (1)
For the relay (2) whose relay contact (2B) is disconnected due to the current flowing in (2A), relay the thermistor (3) and resistor (4) connected in parallel.
A temperature compensation circuit for a relay, which is connected in series with (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2601092U JPH0579850U (en) | 1992-03-27 | 1992-03-27 | Relay temperature compensation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2601092U JPH0579850U (en) | 1992-03-27 | 1992-03-27 | Relay temperature compensation circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0579850U true JPH0579850U (en) | 1993-10-29 |
Family
ID=12181734
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2601092U Pending JPH0579850U (en) | 1992-03-27 | 1992-03-27 | Relay temperature compensation circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0579850U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005532689A (en) * | 2002-07-09 | 2005-10-27 | スマート エレクトロニクス インク | Fuse resistor and manufacturing method thereof |
-
1992
- 1992-03-27 JP JP2601092U patent/JPH0579850U/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005532689A (en) * | 2002-07-09 | 2005-10-27 | スマート エレクトロニクス インク | Fuse resistor and manufacturing method thereof |
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