JPH04174928A - Relay circuit - Google Patents
Relay circuitInfo
- Publication number
- JPH04174928A JPH04174928A JP30504790A JP30504790A JPH04174928A JP H04174928 A JPH04174928 A JP H04174928A JP 30504790 A JP30504790 A JP 30504790A JP 30504790 A JP30504790 A JP 30504790A JP H04174928 A JPH04174928 A JP H04174928A
- Authority
- JP
- Japan
- Prior art keywords
- capacitor
- circuit
- voltage
- constant current
- coil
- 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
- 239000003990 capacitor Substances 0.000 claims abstract description 35
- 238000001816 cooling Methods 0.000 abstract description 4
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000009434 installation Methods 0.000 abstract 1
- 230000007423 decrease Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
Landscapes
- Video Image Reproduction Devices For Color Tv Systems (AREA)
- Relay Circuits (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は例えばテレビ受信機における受像管の消磁装
置に使用されるリレー回路に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a relay circuit used, for example, in a demagnetizing device for a picture tube in a television receiver.
第2図はこの種従来のリレー回路を適用した受像管の消
磁装置を示す回路図である。なお、受像管の消磁は、例
えば、電源投入時に消磁コイルに交流電流を通電しこの
電流を次第、に減衰させることによって消磁を行い地磁
気の影響による色むらを防止するものである。また、こ
こで、リレー回路は100Vと200vの電源電圧に対
して共用可能とするために採用されている。FIG. 2 is a circuit diagram showing a picture tube degaussing device to which this kind of conventional relay circuit is applied. Note that the picture tube is demagnetized by, for example, passing an alternating current through a degaussing coil when the power is turned on and gradually attenuating this current to prevent color unevenness due to the influence of earth's magnetism. Further, the relay circuit is adopted here so that it can be used commonly for power supply voltages of 100V and 200V.
図において、(1)は電源で、受信機本体の仕様によっ
て100Vの場合と200vの場合とかある。(2)は
電源スィッチ、(3)は消磁コイル、4)および(5)
はそれぞれ100V回路用および200V回路用のポジ
スタ−1(6)は消磁スイッチ、(7)はリレーて、そ
の固定接点(8a)および固定接点(8b)はそれぞれ
ポジスタ−(4)およびポジスタ−(5)の一端に接続
され、可動接点(8c)は接地部に接続されている。以
上か消磁装置の主回路部分て、次に、電源電圧の判別回
路およびリレーmの励磁回路について説明する。In the figure, (1) is the power supply, which may be 100V or 200V depending on the specifications of the receiver body. (2) is the power switch, (3) is the degaussing coil, 4) and (5)
POSISTOR 1 (6) is a degaussing switch for 100V circuit and 200V circuit, respectively, and POSISTOR (7) is a relay, and its fixed contact (8a) and fixed contact (8b) are POSISTOR (4) and POSISTOR ( 5), and the movable contact (8c) is connected to the ground part. Now that the main circuit of the degaussing device has been described above, the power supply voltage discrimination circuit and the excitation circuit for relay m will be explained.
(9)は整流ダイオード、(lO)は整流コンデンサ、
(11)は抵抗(+ 2) (13)を介して整流コン
デンサ(10)に接続された電圧検出回路で、電源(1
)の電圧で100■に相当する電圧を検出したときは切
替スイッチ(14)をオン、200vに相当する電圧の
ときは切替スイッチ(14)をオフとする。(9) is a rectifier diode, (lO) is a rectifier capacitor,
(11) is a voltage detection circuit connected to the rectifier capacitor (10) via a resistor (+2) (13),
) When a voltage corresponding to 100V is detected, the changeover switch (14) is turned on, and when the voltage corresponds to 200V, the changeover switch (14) is turned off.
(15)は電圧ブロックダイオード、(16)はリレー
(7)の回路時定数を調整するための時定数コンデンサ
、(+7) (18)は抵抗、(19)はリレーコイル
、(20)はスナバタイオート、(21)はりし−コイ
ル(1つ)と直列に接続された定電流回路で、トランジ
スタ(22) (23)および抵抗(24)から構成さ
れている。(15) is a voltage blocking diode, (16) is a time constant capacitor for adjusting the circuit time constant of relay (7), (+7) (18) is a resistor, (19) is a relay coil, (20) is a snubber (21) A constant current circuit connected in series with a coil (one), consisting of transistors (22) (23) and a resistor (24).
次に動作について説明する。先ず、100νの電源(1
)に適用された場合について説明する。電源スィッチ(
2)を投入すると、整流コンデンサ(10)か充電され
電R(1)の電圧、即ち100vの約37倍の端子電圧
となる。電圧検出回路(11)はこの整流コンデンサ(
10)の電圧から切替スイッチ(14)をオンとする。Next, the operation will be explained. First, a 100ν power supply (1
) is applied. Power switch (
2), the rectifying capacitor (10) is charged and the terminal voltage becomes approximately 37 times the voltage of the current R(1), that is, 100V. The voltage detection circuit (11) is connected to this rectifier capacitor (
10), turn on the selector switch (14).
この結果、定電流回路(21)か短絡されリレーコイル
(19)は励磁されないので、可動接点(8C)は固定
接点(8a)側に保持されたままとなり、所定の設定時
開で消磁スイッチ(6)が投入されると消磁コイル(3
)とポジスタ−(4)とが電源(1)の回路に挿入され
ることになる。そして、消磁コイル(3)に電流が流れ
ることにより受像管の消磁動作が開始される。ポジスタ
−4)はその通電によって温度が上昇し、それに伴って
その抵抗値か増大して消磁コイル(3)の電流か次第に
減少し所定の消磁か達成される訳である。As a result, the constant current circuit (21) is short-circuited and the relay coil (19) is not excited, so the movable contact (8C) remains held on the fixed contact (8a) side, and the degaussing switch ( 6) is turned on, the degaussing coil (3
) and the POSISTOR (4) will be inserted into the circuit of the power supply (1). Then, a current flows through the demagnetizing coil (3), thereby starting the demagnetizing operation of the picture tube. The temperature of the POSISTOR 4) rises due to its energization, its resistance value increases accordingly, and the current in the demagnetizing coil (3) gradually decreases to achieve a predetermined level of demagnetization.
次に、この装置か200vコ〕電源(1)に適用された
場合には、電源ス、イッチ(2)の投入により電圧検出
回路(11)か動作して切替スイッチ(14)かオフと
なる。Next, when this device is applied to the 200v power supply (1), the voltage detection circuit (11) operates when the power switch (2) is turned on, and the changeover switch (14) is turned off. .
これにより、定電流回路(21)か動作してリレーコイ
ル(19)に電流か供給され可動接点(8c)か駆動さ
れて固定接点(8b)と接触する。ここで、消磁スイ・
ソチ(6)か投入されると消磁コイル(3)とポジスタ
−(5)とか200vの電源(1)の回路に挿入される
ことになり、100V回路の場合と同様、所定の消磁作
用が行われる。As a result, the constant current circuit (21) operates, current is supplied to the relay coil (19), and the movable contact (8c) is driven to come into contact with the fixed contact (8b). Here, use the degaussing switch.
When Sochi (6) is turned on, the degaussing coil (3), POSISTOR (5), and 200V power supply (1) will be inserted into the circuit, and the prescribed demagnetizing effect will be performed as in the case of the 100V circuit. be exposed.
ここで、時定数コンデンサ(16)はリレーコイル(1
9)に流れる電流の時定数を調整し、200vの電源回
路に誤って+00ν回路用のポジスタ−4)か挿入され
ることのないよう消磁スイッチ(6)の動作タイミング
との協調かとられている。Here, the time constant capacitor (16) is the relay coil (1
The time constant of the current flowing through 9) is adjusted and coordinated with the operation timing of the degaussing switch (6) to prevent the +00ν circuit POSISTOR 4) from being accidentally inserted into the 200V power supply circuit. .
従来のリレー回路は以上のように構成されているので、
特に時定数コンデンサ(16)には電源(1)の電圧を
整流した値が直接印加されるのでその分高耐圧什様の大
きなコンデンサとなる。また、同コンデンサは、所定の
時定数を得るためかなり大きな容量値のものとなってこ
の面からも大形化するとともに、容量か大きくなる結果
、定電流回路(21)の電′流か出力されて(時定数コ
ンデンサ(16)の電圧はあまり低下せず結果として定
電流回路(21)を構成するトランジスタ(221(2
31のコレクターエミッタ間で負担する電圧が大きくな
りコレクタ損失か増大する。このため冷却ファン等を設
けて冷却能力を増大させる必要が生じ得る。Conventional relay circuits are configured as described above, so
In particular, since a value obtained by rectifying the voltage of the power supply (1) is directly applied to the time constant capacitor (16), the capacitor becomes a large capacitor with a correspondingly high withstand voltage. In addition, the same capacitor has a considerably large capacitance value in order to obtain a predetermined time constant, and from this point of view as well, it becomes large in size.As a result of the large capacitance, the current of the constant current circuit (21) (The voltage of the time constant capacitor (16) does not decrease much, and as a result, the voltage of the transistor (221 (2) constituting the constant current circuit (21)
The voltage borne between the collector and emitter of 31 becomes large, and the collector loss increases. Therefore, it may be necessary to increase the cooling capacity by providing a cooling fan or the like.
この発明は以上のような問題点を解消するためになされ
たもので、コンデンサの定格を低減し定を流回路の発生
損失を低減して装置の小形、低兼化を図らんとするもの
である。This invention was made to solve the above-mentioned problems, and aims to reduce the rating of the capacitor and reduce the loss generated in the constant current circuit, thereby making the device smaller and less expensive. be.
この発明に係るリレー回路は、相互に直列となって直流
電源に接続されるリレーコイルおよび定電流回路と、上
記リレーコイルと並列に接続され上記リレーコイルの回
路時定数を調整するコンデンサとを備えたちのである。A relay circuit according to the present invention includes a relay coil and a constant current circuit that are connected in series with each other to a DC power source, and a capacitor that is connected in parallel with the relay coil and adjusts a circuit time constant of the relay coil. It's ours.
「作 用〕
コ〉・テンサは、リレーコイルの電圧で動作するので、
その印加電圧は直流電源の電圧より低くなる。また、直
流電源のレキュレージョンを適当に設定することにより
、定電流回路て負担する電圧を低減させることか可能と
なる。``Function〕 The tensa operates with the voltage of the relay coil, so
The applied voltage will be lower than the voltage of the DC power supply. Furthermore, by appropriately setting the regulation of the DC power supply, it is possible to reduce the voltage borne by the constant current circuit.
第1図はこの発明の一実施例によるリレー回路を適用し
た消磁装置を示す回路図である0図において従来の第2
図の回路と異なるのは、従来の時定数コンデンサ(16
)に替って時定数コンデンサ(25)をリレーコイル(
1つ)と並列に接続した点である。FIG. 1 is a circuit diagram showing a degaussing device to which a relay circuit according to an embodiment of the present invention is applied.
What is different from the circuit shown in the figure is the conventional time constant capacitor (16
) instead of the time constant capacitor (25) and the relay coil (
1) in parallel.
電源(1)の電圧が100vまたは200vの場合の基
本的な動作は従来と同一であるので重複を避けるため説
明は省略するが、この場合、リレーコイル(19)の電
流の時定数は時定数コンデンサ(25)によって調整す
ることになる。The basic operation when the voltage of the power supply (1) is 100v or 200v is the same as before, so the explanation will be omitted to avoid duplication, but in this case, the time constant of the current of the relay coil (19) is the time constant. It will be adjusted by a capacitor (25).
従って、直流電源である整流コンデンサ(10)に直接
接続する従来の時定数コンデンサ(16)の場合に比較
してコンデンサの定格電圧を低減することができその分
コンデンサの小形化が可能となる。Therefore, compared to the case of a conventional time constant capacitor (16) directly connected to a rectifying capacitor (10) which is a DC power source, the rated voltage of the capacitor can be reduced, and the capacitor can be made smaller accordingly.
また、定電流回路(21)の動作、即ち通電により整流
コンデンサ(10)の電圧か適度に低下し、その分定電
流回路(21)での分担電圧が低減してそのコレクタ損
失が減少する。従って、冷却ファン等の設備軽減が実現
する訳である。In addition, the voltage of the rectifying capacitor (10) decreases appropriately due to the operation of the constant current circuit (21), that is, energization, and the voltage shared by the constant current circuit (21) decreases accordingly, reducing its collector loss. Therefore, equipment such as cooling fans can be reduced.
なお、上記実施例では受像管の消磁装置に適用した場合
について説明したか、この発明はリレーコイルと定電流
回路とを直列にして直流電源に接続する種々のリレー回
路に同様に適用することができ同等の効果を奏する。Although the above embodiments have been described with reference to the case of application to a picture tube degaussing device, the present invention can be similarly applied to various relay circuits in which a relay coil and a constant current circuit are connected in series to a DC power source. It has the same effect.
この発明は以上のように構成されているので、コンデン
サの定格電圧を低減して小形化が可能となり、定電圧回
路での発生損失の低減も可能となる。Since the present invention is configured as described above, it is possible to reduce the rated voltage of the capacitor and downsize it, and it is also possible to reduce the loss generated in the constant voltage circuit.
第1図はこの発明の一実施例によるリレー回路を適用し
た受像管の消磁装置を示す回路図、第2図は従来のちの
の同様の回路図である。
図において、(7)はりし−1(10)は(σ流電源と
しての整流コンデンサ、(19)はりし−コイル、(2
1)は定電流回路、(25)はコンデンサとしての時定
数コンデンサである。
なお、各図中同一符号は同一または相当部分を示す。
代理人 弁理士 大 岩 増 雄FIG. 1 is a circuit diagram showing a picture tube degaussing device to which a relay circuit according to an embodiment of the present invention is applied, and FIG. 2 is a similar circuit diagram of a conventional circuit. In the figure, (7) beam-1 (10) is (a rectifier capacitor as a σ current power source, (19) beam-coil, (2
1) is a constant current circuit, and (25) is a time constant capacitor as a capacitor. Note that the same reference numerals in each figure indicate the same or corresponding parts. Agent: Masuo Oiwa, patent attorney
Claims (1)
および定電流回路と、上記リレーコイルと並列に接続さ
れ上記リレーコイルの回路時定数を調整するコンデンサ
とを備えたリレー回路。A relay circuit comprising a relay coil and a constant current circuit that are connected in series to a DC power source, and a capacitor that is connected in parallel with the relay coil and adjusts a circuit time constant of the relay coil.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP30504790A JPH04174928A (en) | 1990-11-07 | 1990-11-07 | Relay circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP30504790A JPH04174928A (en) | 1990-11-07 | 1990-11-07 | Relay circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH04174928A true JPH04174928A (en) | 1992-06-23 |
Family
ID=17940475
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP30504790A Pending JPH04174928A (en) | 1990-11-07 | 1990-11-07 | Relay circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH04174928A (en) |
-
1990
- 1990-11-07 JP JP30504790A patent/JPH04174928A/en active Pending
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