JPH0591656A - Electronic apparatus with motor - Google Patents
Electronic apparatus with motorInfo
- Publication number
- JPH0591656A JPH0591656A JP3249092A JP24909291A JPH0591656A JP H0591656 A JPH0591656 A JP H0591656A JP 3249092 A JP3249092 A JP 3249092A JP 24909291 A JP24909291 A JP 24909291A JP H0591656 A JPH0591656 A JP H0591656A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- motor
- power supply
- switch
- input voltage
- 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.)
- Granted
Links
Landscapes
- Power Sources (AREA)
- Emergency Protection Circuit Devices (AREA)
- Protection Of Static Devices (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、携帯型のワードプロセ
ッサ等モータを備える電子機器に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic device having a motor such as a portable word processor.
【０００２】[0002]
【従来の技術】モータを備える電子機器では、モータを
停止した時にそのコイルに発生する逆起電力によって電
子機器本体制御部（回路部）が悪影響を受けることのな
いように、従来は、電源を別々に設け、それぞれからモ
ータと制御部に対して電源供給を行っていた。図３は、
従来の電子機器の概略構成図である。モータＭに対して
は電源１から電源供給され、制御部に対しては電源２か
ら電源が供給されるようになっている。2. Description of the Related Art In an electronic device equipped with a motor, a power supply has been conventionally used so that a control unit (circuit unit) of the electronic device main body is not adversely affected by a back electromotive force generated in a coil of the electronic device when the motor is stopped. They were provided separately, and power was supplied from each to the motor and control unit. Figure 3
It is a schematic block diagram of the conventional electronic device. Power is supplied from the power supply 1 to the motor M, and power is supplied from the power supply 2 to the control unit.
【０００３】[0003]
【発明が解決しようとする課題】しかし、従来の技術で
は、電源を少なくとも２個必要とするために、１個の電
源だけを使用する機器に比較して部品数，価格，スペー
スにおいて非常に不利である。However, in the prior art, since at least two power supplies are required, the number of parts, price, and space are extremely disadvantageous as compared with a device using only one power supply. Is.
【０００４】本発明の目的は、電源が一つであってもモ
ータの逆起電力によって制御部が影響を受けることのな
い、モータを備える電子機器を提供することにある。An object of the present invention is to provide an electronic device equipped with a motor in which the control section is not affected by the back electromotive force of the motor even with a single power supply.
【０００５】[0005]
【課題を解決するための手段】本発明は、一つの電源回
路出力にモータと電子機器本体制御部が接続されるとと
もに、前記制御部への電源ラインにはスイッチ回路が挿
入され、さらに、前記電源回路への入力電圧を検出し、
その入力電圧が略ゼロに低下した時に前記スイッチ回路
をオフするスイッチオフ回路を設けてなることを特徴と
する。According to the present invention, a motor and an electronic device main body control section are connected to one power supply circuit output, and a switch circuit is inserted in a power supply line to the control section. Detects the input voltage to the power supply circuit,
A switch-off circuit is provided for turning off the switch circuit when the input voltage drops to substantially zero.
【０００６】[0006]
【作用】電源がオフされると、スイッチオフ回路が電源
への入力電圧が略ゼロに低下するのを検出し、スイッチ
回路をオフする。通常、電源回路の時定数は比較的大き
いために、スイッチオフ回路が入力電圧の低下を検出し
た時点でもモータに対しての電源供給は急激に低下しな
い。したがって、モータには大きな逆起電力が発生して
いない。この時にスイッチ回路がオフされて制御部への
電源供給が停止する。その後、電源回路出力が急激に低
下し、モータの両端に逆起電力が発生するが、この時に
は既にスイッチ回路がオフされているためにその逆起電
力が制御部に印加されることはない。When the power supply is turned off, the switch-off circuit detects that the input voltage to the power supply drops to substantially zero and turns off the switch circuit. Usually, since the time constant of the power supply circuit is relatively large, the power supply to the motor does not suddenly decrease even when the switch-off circuit detects a decrease in the input voltage. Therefore, large back electromotive force is not generated in the motor. At this time, the switch circuit is turned off and the power supply to the control unit is stopped. After that, the output of the power supply circuit sharply drops and counter electromotive force is generated at both ends of the motor. However, at this time, the counter electromotive force is not applied to the control unit because the switch circuit has already been turned off.
【０００７】[0007]
【実施例】図２は、本発明の実施例のブロック図を示
す。2 shows a block diagram of an embodiment of the present invention.
【０００８】図に示すように、モータ１１と制御部１２
には、一つの電源１０から電源を供給している。制御部
１２への電源ライン１３にはトランジスタスイッチ素子
で構成されるスイッチ回路１４が挿入され、このスイッ
チ回路１４が、スイッチオフ回路１５によってオフ制御
されるようになっている。スイッチオフ回路１５は、電
源１０に比較して非常に小さい容量のもの（時定数が非
常に小さい）であり、電源１０への入力電圧を常時検出
し、その入力電圧がほぼゼロに低下した時に“Ｈ”を出
力し、スイッチ回路１４のトランジスタをオフする。こ
の時、電源１０はスイッチオフ回路１５に比べて時定数
がかなり大きいために、その出力電圧はまだ低下してい
ない。したがって、モータ１１のコイル間にも逆起電力
がほとんど生じていない。スイッチ回路１４がオフして
からさらに時間が経過すると、電源１０の出力電圧が急
激に低下し、その時にモータ１１に逆起電力が発生す
る。As shown in the figure, the motor 11 and the controller 12
The power is supplied from a single power supply 10. A switch circuit 14 composed of a transistor switch element is inserted in the power supply line 13 to the control unit 12, and the switch circuit 14 is turned off by a switch off circuit 15. The switch-off circuit 15 has a very small capacity (the time constant is very small) as compared with the power supply 10, and always detects the input voltage to the power supply 10 and when the input voltage drops to almost zero. It outputs "H" and turns off the transistor of the switch circuit 14. At this time, the power supply 10 has a considerably larger time constant than the switch-off circuit 15, so that the output voltage thereof has not yet dropped. Therefore, almost no counter electromotive force is generated between the coils of the motor 11. When a further time elapses after the switch circuit 14 is turned off, the output voltage of the power supply 10 suddenly drops, and a counter electromotive force is generated in the motor 11 at that time.
【０００９】しかし、この時には既にスイッチ回路１４
がオフしているために、その逆起電力が制御部１２に加
わることはない。However, at this time, the switch circuit 14 has already been
Is off, the counter electromotive force is not applied to the control unit 12.
【００１０】[0010]
【発明の効果】電子機器本体制御部への電源ラインにス
イッチ回路を挿入して、モータに逆起電力が生じる前に
このスイッチ回路をオフすることによって上記逆起電力
が制御部に印加されるのを防止する。したがって、一つ
の電源であっても逆起電力による悪影響を防止できる。
また、モータの消費電力に比較して上記制御部の消費電
力は非常に小さい場合が多いから、電源１０の大きさも
それほど大きくならないことが多い。The counter electromotive force is applied to the control unit by inserting the switch circuit into the power supply line to the electronic device main body control unit and turning off the switch circuit before the counter electromotive force is generated in the motor. Prevent. Therefore, it is possible to prevent the adverse effect due to the back electromotive force even with one power source.
In addition, the power consumption of the control unit is often very small compared to the power consumption of the motor, so that the size of the power supply 10 does not often increase so much.
【図１】本発明の構成を示すブロック図FIG. 1 is a block diagram showing a configuration of the present invention.
【図２】本発明の実施例を示す図FIG. 2 is a diagram showing an embodiment of the present invention.
【図３】従来の電子機器の概略ブロック図FIG. 3 is a schematic block diagram of a conventional electronic device.
１−電源 ２−モータ ３−制御部 ４−スイッチ回路 ５−スイッチオフ回路 1-Power supply 2-Motor 3-Control unit 4-Switch circuit 5-Switch-off circuit
───────────────────────────────────────────────────── フロントページの続き (72)発明者 原 勝志 大阪市阿倍野区長池町22番22号 シヤープ 株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Katsushi Hara 22-22 Nagaike-cho, Abeno-ku, Osaka
Claims (1)
体制御部が接続されるとともに、前記制御部への電源ラ
インにはスイッチ回路が挿入され、さらに、前記電源回
路への入力電圧を検出し、その入力電圧が略ゼロに低下
した時に前記スイッチ回路をオフするスイッチオフ回路
を設けてなる、モータを備える電子機器。1. A motor and an electronic device body control unit are connected to one power supply circuit output, and a switch circuit is inserted in a power supply line to the control unit, and further, an input voltage to the power supply circuit is detected. Then, an electronic device including a motor, which is provided with a switch-off circuit that turns off the switch circuit when the input voltage thereof decreases to substantially zero.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3249092A JP2862714B2 (en) | 1991-09-27 | 1991-09-27 | Electronic equipment with motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3249092A JP2862714B2 (en) | 1991-09-27 | 1991-09-27 | Electronic equipment with motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0591656A true JPH0591656A (en) | 1993-04-09 |
| JP2862714B2 JP2862714B2 (en) | 1999-03-03 |
Family
ID=17187864
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3249092A Expired - Lifetime JP2862714B2 (en) | 1991-09-27 | 1991-09-27 | Electronic equipment with motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2862714B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006208502A (en) * | 2005-01-25 | 2006-08-10 | Ricoh Co Ltd | Image forming apparatus and power interruption method |
| WO2009153915A1 (en) * | 2008-06-19 | 2009-12-23 | パナソニック株式会社 | Motor control apparatus |
-
1991
- 1991-09-27 JP JP3249092A patent/JP2862714B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006208502A (en) * | 2005-01-25 | 2006-08-10 | Ricoh Co Ltd | Image forming apparatus and power interruption method |
| WO2009153915A1 (en) * | 2008-06-19 | 2009-12-23 | パナソニック株式会社 | Motor control apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2862714B2 (en) | 1999-03-03 |
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