JPH01314318A - Power switching circuit - Google Patents
Power switching circuitInfo
- Publication number
- JPH01314318A JPH01314318A JP14570488A JP14570488A JPH01314318A JP H01314318 A JPH01314318 A JP H01314318A JP 14570488 A JP14570488 A JP 14570488A JP 14570488 A JP14570488 A JP 14570488A JP H01314318 A JPH01314318 A JP H01314318A
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- transistor
- switch
- load
- switching circuit
- 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
Landscapes
- Continuous-Control Power Sources That Use Transistors (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はマイコンのリセット回路等瞬時の電圧降下で誤
動作全行なう回路を有り九＃Ｉｔ源切換回路に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a 9#It source switching circuit that includes a circuit that malfunctions due to an instantaneous voltage drop, such as a microcomputer reset circuit.
電源リレー等を用いて負荷回路への電源供給を割判する
場合、電ｙＪ ＯＮ時に負荷瞥動によって電源電圧が瞬
時に下がり、制御回路が＃ｉ４動作する。When a power supply relay or the like is used to determine the power supply to a load circuit, when the power is turned ON, the power supply voltage drops instantly due to load fluctuation, and the control circuit operates #i4.
従来は負荷の変動によろ゛区圧変ｗ１を少なくする為、
負荷を小さくするか、１ｇ時の負荷９ｍによっても１手
ｆ＃が少ない電源を用いる（例えば、昭和６２年８月発
売の日立Ｂ８チェーナＴＴ−Ｂ’ｌ’１６１）必要があ
り設計時の制約が大きく、又合理化を行なう上で大きな
障害となっている。Conventionally, in order to reduce the section pressure change w1 due to load fluctuations,
It is necessary to reduce the load or use a power supply with low f# per hand even with a load of 9 m at 1 g (for example, Hitachi B8 Chena TT-B'l'161 released in August 1985), which is a design constraint. This is a major obstacle to rationalization.
〔発明が解決しようとする課題」
マイコンの制御回路等′、・工圧ｆ動に弱い回路へ電源
を供給する嗜、メカスイッチ等切ｊｓ８時間の短かいス
イッチを用いると、切換時に誤動作を起す原因となる。[Problem to be solved by the invention] Microcomputer control circuits, mechanical switches, etc. that supply power to circuits that are susceptible to mechanical pressure movements, etc.If a switch with a short turn-off time of 8 hours is used, malfunctions will occur when switching. Cause.
本発明は電源や負荷を変更する事な（、切換瞬時の負荷
の変動に対して亀圧変ｍを少な（押えて誤動作を防ぐ手
？目的とする。The purpose of the present invention is to prevent malfunctions by minimizing the pressure change due to instantaneous load fluctuations without changing the power supply or load.
上記目的を違底する為にメカスイッチ等の立上が９時間
の短かい切換（瞬時の負荷変動）を、定電圧源として負
荷変動に追従する長い立上がり特性にし、立上がり時間
を長くする為に２電源を同時に開閉できるスイッチの、
低い電圧の出力に立上がりを長（したトランジスタを負
荷との間に挿入し１高いぼ圧のスイッチの出力でこのト
ランジスタを開閉したものでめろ。In order to overcome the above purpose, we changed the short switching time (instantaneous load fluctuation) of mechanical switches, etc., which takes 9 hours to rise, to a long rise characteristic that follows load fluctuations as a constant voltage source, and in order to lengthen the rise time. A switch that can open and close two power supplies at the same time.
Insert a transistor with a low voltage output with a long rise time between it and the load, and use the output of a switch with a higher voltage to open and close this transistor.
制御回路へ供給する電源Ｂ、側と負荷との間にトランジ
スタ′ｆ：ｌｉｉ！源・コレクタ・エミッタ・負荷（Ｎ
ＰＮの場合）の順に接続し、Ｂ１厖圧より高いに圧を供
給する別電源Ｊ３．が電源ＯＮ後Ｂ、より抵抗を介して
上記トランジスタのベースの１位を上げＢ１と負荷が接
続さｒしる。その時のベース４位の立上がり時間はこの
抵抗と、ベース・アース間に接続されているコンデンサ
で決まり、この時定数を適切に設定する事によって制御
回路の誤動作を防ぐ拳ができる。A transistor 'f:lii!' is connected between the power supply B, which supplies the control circuit, and the load. Source, collector, emitter, load (N
In the case of PN), a separate power supply J3. After the power is turned on, the base of the transistor is raised to the first position through the resistor, and B1 and the load are connected. The rise time of the base 4 at that time is determined by this resistor and the capacitor connected between the base and ground, and by setting this time constant appropriately, you can prevent malfunctions of the control circuit.
〔実九例］ 以下２１１：発明の一実月例を第１図により説明する。[Nine real cases] 211: An actual example of the invention will be explained below with reference to FIG.
電源ＯＮ時、制御回路１２によジスイッチ４をオンし、
端子８と９はそれぞれの電源電圧Ｂ１、Ｂ、になるがト
ランジスタ５がＯＦＦ状態でまだ負荷１（１０）に電源
を供給していない。次に第２−図に示す様に抵抗６を介
してトランジスタ５のベース屯圧Ｖ、がα７ｖに達する
ｔ７時間から第３図に示すコレクタ電流１ｃが流れ時め
１１時間で飽和に達する。When the power is turned on, the control circuit 12 turns on the switch 4,
Although the terminals 8 and 9 are at their respective power supply voltages B1 and B, the transistor 5 is in the OFF state and power is not yet supplied to the load 1 (10). Next, as shown in FIG. 2, from time t7 when the base voltage V of the transistor 5 reaches α7v via the resistor 6, the collector current 1c shown in FIG. 3 stops flowing and reaches saturation at 11 hours.
この時の１１時間は抵抗６とコンデンサ７で決まる値で
制御回路１２に応じて設定する。実回路としては几ｗｍ
ａｙａｒｒｓ ｃｗｍｌａａｔｓｙｓ ｔ、−ａ、ａａ
ｙ秒で誤動作が防げた。11 hours at this time is a value determined by the resistor 6 and capacitor 7 and is set according to the control circuit 12. As a real circuit, wm
ayarrs cwmlaatsys t, -a, aa
Malfunction was prevented in y seconds.
本発明は制御回路の誤動作を防げる為、電源回路を簡略
化できるという効果がある。Since the present invention prevents malfunctions of the control circuit, it has the effect of simplifying the power supply circuit.
第１図は本発明の一実施例の回路図、第２図はＷＪｊ図
のトランジスタのリレーＯＮ後からのベース電圧の変化
特性図、第３図はその時のコ・レクタ電流の変化特性図
である。
１・・・制御回路を駆動している電源
２・・・１より高い電圧をもつ別電源
３・・・制御回路
４・・・電源リレー
５・・・トランジスタ
６・・・抵抗
７・・・コンデンサ
８・・・リレー出力端子
９・・・リレー出力端子Figure 1 is a circuit diagram of an embodiment of the present invention, Figure 2 is a characteristic diagram of the change in base voltage after the relay of the transistor shown in the WJj diagram is turned on, and Figure 3 is a characteristic diagram of change in collector current at that time. be. 1... Power supply driving the control circuit 2... Separate power supply 3 with a higher voltage than 1... Control circuit 4... Power supply relay 5... Transistor 6... Resistor 7... Capacitor 8...Relay output terminal 9...Relay output terminal
Claims (1)
を有する第２の直流電源と、第１の直流電源を開閉する
第１のスイッチと、第２の直流電源を開閉し、第１のス
イッチと連動する第２のスイッチより成る電源回路にお
いて、第１のスイッチの出力とトランジスタのコレクタ
を接続し、エミッタを負荷側に接続し、第２のスイッチ
の出力を抵抗を介して該トランジスタのベースに接続し
、ベースとアース間にコンデンサを挿入した事を特徴と
する電源切換回路。1. A first DC power supply, a second DC power supply having a higher voltage than the output voltage of the power supply, a first switch that opens and closes the first DC power supply, a second DC power supply that opens and closes the second DC power supply, and a second DC power supply that opens and closes the first DC power supply. In a power supply circuit consisting of a second switch that operates in conjunction with the first switch, the output of the first switch is connected to the collector of the transistor, the emitter is connected to the load side, and the output of the second switch is connected to the transistor through a resistor. A power supply switching circuit that is connected to the base of a transistor and has a capacitor inserted between the base and ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14570488A JPH01314318A (en) | 1988-06-15 | 1988-06-15 | Power switching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14570488A JPH01314318A (en) | 1988-06-15 | 1988-06-15 | Power switching circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01314318A true JPH01314318A (en) | 1989-12-19 |
Family
ID=15391186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14570488A Pending JPH01314318A (en) | 1988-06-15 | 1988-06-15 | Power switching circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01314318A (en) |
-
1988
- 1988-06-15 JP JP14570488A patent/JPH01314318A/en active Pending
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