JPH0140285Y2 - - Google Patents
Info
- Publication number
- JPH0140285Y2 JPH0140285Y2 JP4577782U JP4577782U JPH0140285Y2 JP H0140285 Y2 JPH0140285 Y2 JP H0140285Y2 JP 4577782 U JP4577782 U JP 4577782U JP 4577782 U JP4577782 U JP 4577782U JP H0140285 Y2 JPH0140285 Y2 JP H0140285Y2
- Authority
- JP
- Japan
- Prior art keywords
- panel
- electric circuit
- capacitor
- power
- 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
- 239000003990 capacitor Substances 0.000 claims description 26
- 230000006378 damage Effects 0.000 description 8
- 230000006866 deterioration Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 4
- 244000145845 chattering Species 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
Landscapes
- Control Of Voltage And Current In General (AREA)
- Power Conversion In General (AREA)
Description
【考案の詳細な説明】
(a) 考案の技術分野
本考案は、着脱式の電気回路パネル、即ち電気
部品が実装されているパネルを、電源を加えたま
まで抜き差しする必要のある電気回路パネルに関
する。[Detailed description of the invention] (a) Technical field of the invention The invention relates to a removable electrical circuit panel, that is, an electrical circuit panel on which electrical components are mounted and which needs to be inserted and removed while the power is still on. .
(b) 技術の背景
電子機器においてパネルの保守点検などを行な
う際、装置全体の電源を切断することができない
場合は、電源が加わつた状態でパネルを装置から
抜き差しするケースが多い。このように電源を加
わえたままで抜き差しするパネルは、第１図のよ
うに、複数種類の電源を必要とする場合は、アー
スは共用されるのが普通である。即ちコイルL1
とコンデンサC1（回路の容量成分も含む）から構
成される電源フイルタF1およびインピーダンス
成分R1を含む回路のアース端子GNDと、電源フ
イルタF2、およびインピーダンス成分R2を含む
回路のアース端子GNDとは、共通になつている。
なおR1，R2は、それぞれの回路における搭載部
品や配線導体などのインピーダンス成分を代表し
て等価的に表したものである。R3は両方の回路
に接続されるインピーダンス成分で、例えば電圧
レベル変換部などのインピーダンスである。(b) Technical Background When performing maintenance or inspection on a panel of electronic equipment, if it is not possible to turn off the power to the entire device, it is often the case that the panel is inserted and removed from the device while the power is still on. For panels that are inserted and removed while the power is still connected, as shown in FIG. 1, if multiple types of power sources are required, the ground is usually shared. i.e. coil L 1
and capacitor C 1 (including the capacitance component of the circuit), the ground terminal GND of the circuit that includes the power filter F 1 and the impedance component R 1 , and the ground terminal of the circuit that includes the power filter F 2 and the impedance component R 2 . It has become common with GND.
Note that R 1 and R 2 are equivalent representations representing impedance components such as mounted components and wiring conductors in each circuit. R3 is an impedance component connected to both circuits, for example, the impedance of a voltage level converter.
そしてこの回路は、VCC，GNDおよびVEで示
される端子部から装置本体に対し着脱できるよう
に、パネルに搭載されている。いまこの回路にお
いて、電源が加わつておれば、コンデンサC1に
VCC（Ｖ）、コンデンサC2にはVE（Ｖ）（本例では負
極性）の電圧がかかる。この回路を含むパネルが
装置から引き抜かれたときは、端子VCC，GND，
VEが装置から外れるので、コンデンサC1，C2に
蓄積されている電荷が移動し、VCC＋VE（Ｖ）の
電圧がコンデンサC1，C2の容量に逆比例して、
各々のコンデンサC1，C2に加わる。コンデンサ
C1，C2の容量をそれぞれC1，C2μFとすると、コ
ンデンサC1の両端に加わる電圧圧VCC′は、
（VCC＋VE）C2／C1＋C2（Ｖ）
コンデンサC2の両端に加わる電圧Ve′は、
（VCC＋VE）C1／C1＋C2（Ｖ）
となり、各々の供給電源電圧VCC，VEに対して異
なる電圧となる。 This circuit is mounted on a panel so that it can be attached to and detached from the main body of the device through terminals indicated by V CC , GND, and VE . Now in this circuit, if power is applied, capacitor C1 will be
V CC (V), and a voltage of V E (V) (negative polarity in this example) is applied to the capacitor C 2 . When the panel containing this circuit is removed from the equipment, the terminals V CC , GND,
Since V E is removed from the device, the charges stored in capacitors C 1 and C 2 move, and the voltage of V CC + V E (V) is inversely proportional to the capacitance of capacitors C 1 and C 2 .
It is added to each capacitor C 1 and C 2 . capacitor
Assuming that the capacitances of C 1 and C 2 are C 1 and C 2 μF, respectively, the voltage V CC ′ applied across the capacitor C 1 is (V CC +V E )C 2 /C 1 +C 2 (V) Capacitor C The voltage V e ' applied to both ends of 2 is (V CC +V E )C 1 /C 1 +C 2 (V), which is a different voltage for each supply power supply voltage V CC and V E.
この電圧がVCC＜VCC′のときに、VCCの電源系
の電気部品の最大定格をVCC(H)とすると、VCC＜
VCC(H)＜VCC′になつた際、電気部品の劣化、破壊
が発生する。また同様の理由で、VE＜Ve′のとき
もVEの電源系の電気部品の劣化、破壊が生じる
ことがある。 When this voltage is V CC <V CC ′, and the maximum rating of the electrical components in the V CC power supply system is V CC (H), then V CC <
When V CC (H) < V CC ′, electrical parts will deteriorate or be destroyed. Furthermore, for the same reason, when V E <V e ′, deterioration or destruction of the electrical components of the power supply system of V E may occur.
例えば、VCC＝5V、VE＝−21V、C1＝10μF、
C2＝100μFで、VCC電源の実装部品が5VのTTL
ICとすると、上記式より
VCC′＝（５＋21）100／1000＋10＝23.6V
となり、VCC電源系に実装されているTTL ICの
最大定格の7Vを越えるので、ICが劣化あるいは
破壊する。 For example, V CC = 5V, V E = -21V, C 1 = 10μF,
C 2 = 100μF and the mounted components of the V CC power supply are 5V TTL
In the case of an IC, from the above formula, V CC ′ = (5 + 21) 100/1000 + 10 = 23.6V, which exceeds the maximum rating of 7V of the TTL IC installed in the V CC power supply system, so the IC will deteriorate or be destroyed.
パネルを装置から引き抜くときだけでなく、パ
ネルに装着するときにも、短い時間でみると、実
際には端子が接触したり離間したりしていわゆる
チヤタリングを発生し、電源のオン・オフを高速
で繰り返しながらパネルの端子が装置側と結合さ
れる。そのため、前記のようなパネル搭載部品の
劣化・破壊はパネルの装着時も発生し、特にパネ
ルの装置からの離脱時や装置への装着時のチヤタ
リングによつて、部品を劣化・破壊する頻度が一
層増え、パネル搭載部品の寿命低下を来す。 Not only when you pull out the panel from the device, but also when you attach it to the panel, if you look at it over a short period of time, the terminals will actually touch or separate, causing so-called chattering, which causes the power to turn on and off at high speed. Repeat this step to connect the terminals on the panel to the equipment side. Therefore, the deterioration and destruction of panel-mounted components as described above also occurs when the panel is installed, and the frequency of deterioration and destruction of components is particularly high due to chattering when the panel is removed from the device or when it is installed on the device. This further increases the lifespan of panel-mounted components.
(c) 従来技術とその問題点
このようなパネル搭載部品の劣化・破壊を防止
するために、従来の方式としては、(1)パネルに電
源フイルタを実装しない方式、(2)複数電源を使用
する回路は、各々の電源ごとにパネルを分離して
構成する方式、(3)各電源系の電源フイルタ部のコ
ンデンサ容量を電源電圧に反比例するように定数
を決定する方式などがある。ところが(1)の方式
は、入力電源の雑音が入るため、回路が誤動作す
る可能性がある。電圧のレベル変換を要する回路
のように、電気回路を電源系ごとに必ずしも分離
できないこともあるので、このような場合は(2)の
方式は適用できない。(3)の方式は、各電源で要求
されている電源フイルタの時定数が、電源電圧に
反比例しない場合は、各々の所要電源フイルタ時
定数が設定値と異なる欠点がある。(c) Conventional technology and its problems In order to prevent such deterioration and destruction of panel-mounted components, conventional methods include (1) not mounting a power filter on the panel, and (2) using multiple power supplies. There are two types of circuits: (3) a method in which a panel is separated for each power supply, and (3) a constant is determined so that the capacitance of the capacitor in the power filter section of each power supply system is inversely proportional to the power supply voltage. However, method (1) introduces noise from the input power supply, which may cause the circuit to malfunction. In some cases, such as circuits that require voltage level conversion, it is not always possible to separate electrical circuits for each power supply system, so method (2) cannot be applied in such cases. The method (3) has the disadvantage that if the time constant of the power filter required by each power source is not inversely proportional to the power supply voltage, the required power filter time constant of each power source differs from the set value.
従つて第１図のように、パネル側に電源フイル
タを実装し、アース端子を共通にせざるをえない
のが実情である。その結果前記のように、搭載部
品の劣化・破壊を来す問題が避けられない。 Therefore, as shown in FIG. 1, the reality is that it is necessary to mount a power filter on the panel side and use a common ground terminal. As a result, as mentioned above, the problem of deterioration and destruction of mounted components is unavoidable.
(d) 考案の目的
本考案は、従来の方式におけるこのような問題
を解消し、電気的動作特性を満足するために、各
電源系とも電源フイルタを持たせ、且つ電気回路
設計上の制約をなくし実装効率の良い電気部品実
装パネルの電気回路方式を実現するものであり、
特にパネルの抜き差し時に各電源のコンデンサに
残留する電荷による電圧が各電源系の電気部品の
最大定格を越えて搭載部品を劣化・破壊すること
の無いようにすることを目的とする。(d) Purpose of the invention In order to solve these problems with the conventional system and satisfy the electrical operating characteristics, the present invention provides a power filter for each power supply system and eliminates restrictions on the electrical circuit design. It realizes an electrical circuit system for electrical component mounting panels that has high mounting efficiency without any problems.
In particular, the purpose is to prevent the voltage due to the charge remaining in the capacitors of each power supply system from exceeding the maximum rating of the electrical components of each power supply system when the panel is inserted or removed, thereby preventing deterioration or destruction of the mounted components.
(e) 考案の構成
この目的を達成するために本考案は、複数の電
源を有する本体装置と分離可能で、前記複数の電
源に対応した電気回路系ごとに少なくともコンデ
ンサを有するフイルタが設けてある着脱式電気回
路パネルに於いて、該着脱式電気回路パネルのア
ースを、各々の電気回路系ごとに分離独立させ、
本体装置と着脱式電気回路パネルを接続する端子
部に、前記分離独立したそれぞれのアースの接続
端子を設け、本体装置に装着したときに前記アー
スの接続端子が接地されるような構成を採つてい
る。(e) Structure of the invention In order to achieve this object, the invention is separable from a main unit having multiple power supplies, and a filter having at least a capacitor is provided for each electric circuit system corresponding to the plurality of power supplies. In a removable electric circuit panel, the earth of the removable electric circuit panel is separated and independent for each electric circuit system,
Separate and independent ground connection terminals are provided in the terminal section connecting the main unit and the removable electric circuit panel, and the structure is such that the ground connection terminals are grounded when attached to the main unit. There is.
(f) 考案の実施例
次に本考案による着脱式電気回路パネルの実施
例を第２図で説明する。この図でVCC電源側に接
続された電源フイルタF1およびインピーダンス
成分R1を含む回路は、アース端子も独立してい
て、アース端子GND1に接続されている。同様に
VE電源側に接続された電源フイルタF2およびイ
ンピーダンス成分R2を含む回路も、独立したア
ース端子GND2に接続されている。R3は、第１図
の場合と同様に両方の回路に接続されるインピー
ダンス成分である。(f) Embodiment of the invention Next, an embodiment of the removable electric circuit panel according to the invention will be described with reference to FIG. In this figure, the circuit including the power filter F 1 and the impedance component R 1 connected to the V CC power supply side also has an independent ground terminal, and is connected to the ground terminal GND 1 . similarly
The circuit containing the power supply filter F 2 and the impedance component R 2 connected to the V E power supply side is also connected to an independent ground terminal GND 2 . R 3 is an impedance component connected to both circuits as in FIG.
このパネルが装置に実装されておれば、コンデ
ンサC1にVCC（Ｖ）、コンデンサC2にはVE（本例で
は負極性）（Ｖ）の電圧が加わる。該パネルを抜
き差しするためにパネルが装置から外れたときに
は、アース端子の分離独立によりコンデンサC1，
C2が電気的に分離されているために、各々のコ
ンデンサに蓄えられる電圧は各々装置からパネル
が引き抜かれる直前の電圧と同一である。そして
コンデンサC1を含むVCC系回路では、コンデンサ
C1とインピーダンスR1で形成される閉ループI1の
みによつてコンデンサC1の電荷が放電されるの
で、VCC系の電気部品には電源電圧VCCより大き
い電圧が加わらず、電気部品の劣化、破壊は生じ
ない。また同様にVe系回路でも、閉ループI2のみ
でコンデンサC2の電荷が放電されるので、電源
電圧VEより大きい電圧は加わらず、従つて閉ル
ープI2側の電気部品も劣化、破壊を来す恐れは無
い。 If this panel is mounted on a device, a voltage of V CC (V) is applied to the capacitor C 1 and a voltage of V E (negative polarity in this example) (V) is applied to the capacitor C 2 . When the panel is removed from the device to be inserted or removed, the capacitor C 1 ,
Because C 2 is electrically isolated, the voltage stored on each capacitor is the same as the voltage just before the panel was removed from each device. In a V CC circuit that includes capacitor C 1 , the capacitor
Since the charge in capacitor C 1 is discharged only through the closed loop I 1 formed by C 1 and impedance R 1 , a voltage higher than the power supply voltage V CC is not applied to the V CC system electrical components, and the electrical components No deterioration or destruction will occur. Similarly, in the V e system circuit, the charge in the capacitor C 2 is discharged only in the closed loop I 2 , so a voltage higher than the power supply voltage V E is not applied, and the electrical components on the closed loop I 2 side are also prevented from deteriorating or being destroyed. There is no fear that it will come.
また、一般的に、本体装置側においては複数電
源のアースを共通として使用する場合が殆どであ
るが、前記本体装置側の複数電源の各々のアース
が別々に独立していて、着脱式電気回路パネルの
アース端子と個別に接続される場合においても、
本考案の作用と効果は全く変わらない。 In addition, in most cases, the ground of multiple power supplies on the main unit side is commonly used, but the ground of each of the multiple power supplies on the main unit side is separate and independent, and the removable electric circuit Even when connected separately to the panel ground terminal,
The function and effect of the present invention remain the same.
(g) 効案の効果
以上のように本考案によれば、複数の電源を有
する本体装置と分離可能で、前記複数の電源に対
応した電気回路系ごとに少なくともコンデンサを
有するフイルタが設けてある着脱式電気回路パネ
ルに於いて、該着脱式電気回路パネルのアース
を、各々の電気回路系ごとに分離独立させ、本体
装置と着脱式電気回路パネルを接続する端子部
に、前記分離独立したそれぞれのアースの接続端
子を設け、本体装置に装着したときに前記アース
の接続端子が接地されるような構成になつてい
る。そのため、パネルが装置から電気的に分離し
た際、各々の電源系の電源フイルタ用コンデンサ
に蓄えられている電荷が、各コンデンサ間で移動
して各々のコンデンサに供給電源以上の電圧が加
わるようなことが無くなる。その結果各回路構成
部品に、対応する電源電圧以上の過大な電圧が印
加されるようなことはなく、回路構成部品の劣
化・破壊が確実に防止される。(g) Effects of the invention As described above, according to the present invention, a filter that can be separated from the main unit having multiple power sources and that has at least a capacitor is provided for each electric circuit system that corresponds to the plurality of power sources. In a removable electric circuit panel, the earth of the removable electric circuit panel is separated and independent for each electric circuit system, and each of the separate and independent A ground connection terminal is provided, and the structure is such that the ground connection terminal is grounded when attached to the main unit. Therefore, when the panel is electrically isolated from the equipment, the charge stored in the power filter capacitors of each power supply system will move between each capacitor, causing a voltage higher than the power supply to be applied to each capacitor. Things disappear. As a result, an excessive voltage higher than the corresponding power supply voltage is not applied to each circuit component, and deterioration and destruction of the circuit components are reliably prevented.
第１図は従来の着脱式電気回路パネルを示す
図、第２図は本考案による着脱式電気回路パネル
の実施例を示す図である。
図において、VCC，VEは電源端子、GND，
GND1，GND2はアース端子、F1，F2は電源フイ
ルタ、L1，L2はコイル、C1，C2はコンデンサ
（回路の容量成分も含む）、R1，R2，R3はインピ
ーダンス成分をそれぞれ示す。
FIG. 1 is a diagram showing a conventional removable electric circuit panel, and FIG. 2 is a diagram showing an embodiment of the removable electric circuit panel according to the present invention. In the figure, V CC and V E are power supply terminals, GND,
GND 1 and GND 2 are ground terminals, F 1 and F 2 are power filters, L 1 and L 2 are coils, C 1 and C 2 are capacitors (including circuit capacitance components), R 1 , R 2 , and R 3 represent impedance components, respectively.
Claims (1)
記複数の電源に対応した電気回路系ごとに少なく
ともコンデンサを有するフイルタが設けてある着
脱式電気回路パネルに於いて、 該着脱式電気回路パネルのアースを、各々の電
気回路系ごとに分離独立させ、本体装置と着脱式
電気回路パネルを接続する端子部に、前記分離独
立したそれぞれのアースの接続端子を設け、本体
装置に装着したときに前記アースの接続端子が接
地されるようにしたことを特徴とする着脱式電気
回路パネル。[Claims for Utility Model Registration] In a removable electric circuit panel that is separable from a main unit having a plurality of power sources and is provided with a filter having at least a capacitor for each electric circuit system corresponding to the plurality of power sources, The ground of the removable electric circuit panel is separated and independent for each electric circuit system, and a connection terminal for each of the separate and independent earths is provided in the terminal section that connects the main unit and the removable electric circuit panel. 1. A removable electrical circuit panel, characterized in that the ground connection terminal is grounded when attached to a device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4577782U JPS58150335U (en) | 1982-03-31 | 1982-03-31 | Removable electrical circuit panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4577782U JPS58150335U (en) | 1982-03-31 | 1982-03-31 | Removable electrical circuit panel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58150335U JPS58150335U (en) | 1983-10-08 |
| JPH0140285Y2 true JPH0140285Y2 (en) | 1989-12-01 |
Family
ID=30056787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4577782U Granted JPS58150335U (en) | 1982-03-31 | 1982-03-31 | Removable electrical circuit panel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58150335U (en) |
-
1982
- 1982-03-31 JP JP4577782U patent/JPS58150335U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58150335U (en) | 1983-10-08 |
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