JPS60148328A - Power source control circuit - Google Patents
Power source control circuitInfo
- Publication number
- JPS60148328A JPS60148328A JP59003437A JP343784A JPS60148328A JP S60148328 A JPS60148328 A JP S60148328A JP 59003437 A JP59003437 A JP 59003437A JP 343784 A JP343784 A JP 343784A JP S60148328 A JPS60148328 A JP S60148328A
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- circuit
- control circuit
- microcomputer
- power source
- 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
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】
〔発明の利用分野〕
本発明は電源の保護に係り、特に電池で動作″′！−る
機器に用いて好適な電源制御回路に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to power supply protection, and particularly to a power supply control circuit suitable for use in battery-operated equipment.
第１図にて従来の電源制御回路を説明する。 A conventional power supply control circuit will be explained with reference to FIG.
第１図において１は主電源開閉器として使用するキープ
リレー、２はキープリレー駆動回路、３はマイクロコン
ピュータ、４は主電源の電圧低下を検出する比較回路、
７はマークロコンピユータ３に電源を供給するための安
定化電源を含む負荷回路、８は主電源である。In FIG. 1, 1 is a keep relay used as a main power supply switch, 2 is a keep relay drive circuit, 3 is a microcomputer, 4 is a comparison circuit for detecting a voltage drop in the main power supply,
7 is a load circuit including a stabilized power supply for supplying power to the Markcro computer 3, and 8 is a main power supply.
主電源８の電圧が低下すると比較回路４がマイクロコン
ピュータ３に電源オフ指令信号Ａを出力ｊ６゜マイクロ
コンピュータ３は上記指令信号Ａを認識すると、予め定
められた処理を実行した後、キープリレー駆動回路２に
電源オフ制御信号Ｂを出力してキープリレー１をオフに
制御する。When the voltage of the main power supply 8 decreases, the comparator circuit 4 outputs a power-off command signal A to the microcomputer 3. When the microcomputer 3 recognizes the command signal A, it executes a predetermined process and then drives the keep relay. A power off control signal B is output to the circuit 2 to control the keep relay 1 to turn off.
ところが１．主電源８にニッケル・カドミウム電池等を
使用した場合、電池の指圧降下速度が太きいため、上記
手順に従ってキープリレー１をオフしようとじても間に
合わない場合がある。However, 1. If a nickel-cadmium battery or the like is used as the main power source 8, the acupressure drop rate of the battery is fast, so even if you try to turn off the keep relay 1 according to the above procedure, it may not be in time.
即ち、マイクロコンピュータ３が電源オフ制御信号Ｂを
出力した時点で、既に′亀諒電圧がキープリレー駆動回
路２の動作電圧範囲より下に落ちていた場合、キープリ
レー１をオフに駆動１−ることかできず、主電源８には
負荷が接続されたままとなる。このとき主電源８が二次
電池であると該電池は過放電のために寿命が劣化する。That is, when the microcomputer 3 outputs the power-off control signal B, if the voltage has already fallen below the operating voltage range of the keep relay drive circuit 2, the keep relay 1 is turned off and driven. Therefore, the load remains connected to the main power source 8. At this time, if the main power source 8 is a secondary battery, the life of the battery will deteriorate due to overdischarge.
上記のように従来回路には二次電池による動作において
Ｐ”Ｒ：池の寿命を劣化させる危険性があった。As mentioned above, the conventional circuit has the risk of deteriorating the life of the P"R: battery when operating with a secondary battery.
本発明の目的は、上記従来技術の欠点を解決し、電源電
圧異常低下時に確実に負荷を開放する電源制御回路を提
供剃るにある。SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned drawbacks of the prior art and provide a power supply control circuit that reliably releases the load when the power supply voltage drops abnormally.
本発明は電源電圧の異常低下を検出した際、直ちに電源
から負荷を開放する回路を設けたこと、および紐′亀源
電圧異常低下検出回路をマイクロコンピータのリセット
回路と共用したことを特徴とするものである。The present invention is characterized in that a circuit is provided to immediately disconnect the load from the power supply when an abnormal drop in the power supply voltage is detected, and that the abnormal voltage drop detection circuit is also used as a reset circuit for the microcomputer. It is something.
第２図にて本発明の一実施例を説明する。第２図におい
て５はマイクロコンピュータ３に供給される電源電圧の
立上りおよび異常低下を検出するリセット回路、６はダ
イオードである。An embodiment of the present invention will be explained with reference to FIG. In FIG. 2, 5 is a reset circuit for detecting the rise and abnormal fall of the power supply voltage supplied to the microcomputer 3, and 6 is a diode.
主電源８の電圧がゆるやかに低下した場合の。When the voltage of the main power supply 8 gradually decreases.
キープリレーオフ制御は従来回路と同様である。Keep relay-layoff control is similar to the conventional circuit.
主電源８の電圧低下速度が太きいために従来回路による
キープリレー１のオフ制御が行なわれなかった場合は、
マイクロコンピュータ３に供給される電源電圧Ｃが低下
し、リセット回路５が出力するリセット信号りによって
キープリレー駆動回路２がキープリレー１をオフに制御
する。また、リセット回路５は電源投入時および電源瞬
断時にはマイクロコンピュータ６にリセット信号りを供
給する。If the keep relay 1 is not controlled to turn off by the conventional circuit because the voltage drop rate of the main power supply 8 is fast,
The power supply voltage C supplied to the microcomputer 3 decreases, and the keep relay drive circuit 2 controls the keep relay 1 to turn off in response to a reset signal output from the reset circuit 5. Further, the reset circuit 5 supplies a reset signal to the microcomputer 6 when the power is turned on and when the power is momentarily interrupted.
本実施列によれば、従来回路にダイオードを１点追加す
ることにより電源電圧異常低下時にもキープリレ−１を
オフに駆動することができる。According to this embodiment, by adding one diode to the conventional circuit, the keep relay 1 can be driven off even when the power supply voltage is abnormally low.
本発明によれば、電源電圧の真言低下時にも電源を負荷
から解放することができるため、電源として使用する二
次電池の過放電を防止する効果がある。According to the present invention, since the power source can be released from the load even when the power source voltage drops, there is an effect of preventing overdischarge of the secondary battery used as the power source.
また、所要回路のほとんどをマイクロコンピュータのリ
セット回路と共用できるため部品コストが上昇しない利
点がある。Furthermore, since most of the required circuits can be shared with the reset circuit of the microcomputer, there is an advantage that component costs do not increase.
第１図は従来技術による電源制御回路図、第２図は本発
明による電源制御回路の一実施例の回路図である。
１・・・キープリレー
２・・・キープリレー駆動回路
６・・・マイクロコンピュータ
４・・・比較回路
５・・・リセット回路
６・・・ダイオード
７・・・負荷回路
８・・・主電源
代理人弁理士 高 橋 明
第１口
才２図FIG. 1 is a power supply control circuit diagram according to the prior art, and FIG. 2 is a circuit diagram of an embodiment of the power supply control circuit according to the present invention. 1... Keep relay 2... Keep relay drive circuit 6... Microcomputer 4... Comparison circuit 5... Reset circuit 6... Diode 7... Load circuit 8... Main power supply substitute Akira Takahashi, a private patent attorney
Claims (1)
タおよび′電源電圧異常低下時に該マイクロコンピュー
タをリセ、ツトする回路とを有する電源制御回路におい
て、該リセット回路の出力信号によって上記電源開閉器
をオフ側に駆動する手段を設けたことを特徴とする電源
制御回路。1. In a power supply control circuit having a power switch, a drive circuit for the switch, a microcomputer, and a circuit for resetting and shutting off the microcomputer when the power supply voltage drops abnormally, the power switch is reset by the output signal of the reset circuit. A power supply control circuit characterized in that it is provided with means for driving the OFF side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59003437A JPS60148328A (en) | 1984-01-13 | 1984-01-13 | Power source control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59003437A JPS60148328A (en) | 1984-01-13 | 1984-01-13 | Power source control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60148328A true JPS60148328A (en) | 1985-08-05 |
Family
ID=11557332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59003437A Pending JPS60148328A (en) | 1984-01-13 | 1984-01-13 | Power source control circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60148328A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6397349U (en) * | 1986-12-13 | 1988-06-23 | ||
| JPH0277734U (en) * | 1988-12-01 | 1990-06-14 |
-
1984
- 1984-01-13 JP JP59003437A patent/JPS60148328A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6397349U (en) * | 1986-12-13 | 1988-06-23 | ||
| JPH0277734U (en) * | 1988-12-01 | 1990-06-14 | ||
| JP2536046Y2 (en) * | 1988-12-01 | 1997-05-21 | 株式会社キーエンス | Power supply circuit of programmable controller |
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