JPS6096186A - Controller for driving copying machine - Google Patents
Controller for driving copying machineInfo
- Publication number
- JPS6096186A JPS6096186A JP58202711A JP20271183A JPS6096186A JP S6096186 A JPS6096186 A JP S6096186A JP 58202711 A JP58202711 A JP 58202711A JP 20271183 A JP20271183 A JP 20271183A JP S6096186 A JPS6096186 A JP S6096186A
- Authority
- JP
- Japan
- Prior art keywords
- current
- circuit
- motor
- comparator
- output
- 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
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/50—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control
- G03G15/5008—Driving control for rotary photosensitive medium, e.g. speed control, stop position control
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
- H02P1/16—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters
- H02P1/18—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual dc motor
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Motor And Converter Starters (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、複写機駆動モータの制御装置に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a control device for a copying machine drive motor.
従来、複写機の光学系、現像器、定着器、紙送り系、感
光体の各ユニットに、それぞれ小型の直流モータを設け
、各々任意の設定速度上動作させる方式において、各直
流モーターの制御に第１図に示す様な制御回路が使用さ
れていた。Conventionally, each unit of a copying machine, including the optical system, developer, fixing unit, paper feed system, and photoconductor, is equipped with a small DC motor, and each unit is operated at an arbitrary set speed. A control circuit as shown in Figure 1 was used.
即ち、位相比較器（１）、ローパスフィルター（２）、
ＰＷＢコンパレータ（３）、三角波発生回路（４）、チ
ョツピ〉グアンド回路（５）、トランジスタ（６）、モ
ータ（７）、及びエンコー・ダ（８）により閉ループを
形成するモー９ ：ｌ ｙ ） ｏ−ル回路と、定電流
コンパレータ（９）、電流検出抵抗（１ｏ）がらたる電
流制限回路が設けられていた。That is, a phase comparator (1), a low-pass filter (2),
A closed loop is formed by a PWB comparator (3), a triangular wave generation circuit (4), a chopper gate circuit (5), a transistor (6), a motor (7), and an encoder (8). - A current limiting circuit consisting of a constant current comparator (9), and a current detection resistor (1o) was provided.
通常、直流モータの始動時、ギア等にバックラッシュが
あり、直流モータにフル電流を流すと、ギアその他の機
械部品に過度の衝撃が加わり著るしく、信頼性が低下す
る。これを防止する為（二電流制限回路を設け、第２図
に示す様にモータ始動時の電流を制限電流値に抑制する
様にしている。Normally, when a DC motor starts, there is backlash in the gears, etc., and when full current is applied to the DC motor, excessive shock is applied to the gears and other mechanical parts, significantly reducing reliability. In order to prevent this (two current limiting circuits are provided), the current at the time of starting the motor is suppressed to the limiting current value as shown in FIG.
従来は、各ユニット毎に、モーターが取り付けられてい
るため、各々のモータに加わる負荷は比較的軽く、第２
図のように定常電流の値に比べかなり高い値に制限電流
を設定しても、機械部品側に十分な強度をもたせること
ができた。しかしながら、従来各ユニット毎に設けＣい
た、モータの中の何個かを、まとめて同一モータで駆動
しようとする場合、従来に比べ、定常負荷が大きくなっ
ているため、制限電流を従来と同程度の値に設定すると
、第８図に示すように、定帛電流のピーク値が制限電流
設定値と重なってしまい、制限電流回路が機能してピー
ク電流をカットすることになる。Conventionally, a motor is attached to each unit, so the load applied to each motor is relatively light, and the load applied to each motor is relatively light.
As shown in the figure, even if the limiting current was set to a value much higher than the steady current value, sufficient strength could be provided to the mechanical parts. However, when attempting to drive several of the motors that were conventionally provided for each unit with the same motor, the steady load is larger than in the past, so the limiting current is reduced to the same level as in the past. If it is set to a value of about 100%, the peak value of the constant current will overlap with the limited current setting value, as shown in FIG. 8, and the limited current circuit will function to cut the peak current.
この様な状態になると、直流モータが十分な駆動力を得
ることができなくなり、精度の高い速度制御が不可能と
なる。また、頻繁に制限電流回路が動作すると、トラン
ジスタ（６）が常時高周波でスイッチング動作すること
になり、発熱により破壊してしまう。In such a state, the DC motor cannot obtain sufficient driving force, and highly accurate speed control becomes impossible. Furthermore, if the limited current circuit operates frequently, the transistor (6) will constantly switch at a high frequency, causing heat generation and destruction.
本発明は、上記の点に鑑みてなされたもので、最も機械
的衝撃が大きく加わる起動時のみに限り、制限電流回路
を動作させるようにし）゛こ複写機駆動制御装置を提供
することを目的とする。The present invention has been made in view of the above points, and an object of the present invention is to provide a copying machine drive control device in which a limiting current circuit is operated only during startup, where the greatest mechanical shock is applied. shall be.
本発明は直流モータの始動時（二電流制限回路を作動し
、その後は電流制限回路を作動させないようにして、高
負荷時の直流電動桟の速度制御な行うものである。The present invention controls the speed of the DC electric rail during high loads by activating the two current limiting circuits when starting the DC motor, and then not activating the current limiting circuit.
以下本発明を第４図Ｃ二示す実施例に基づき説明する。 The present invention will be explained below based on the embodiment shown in FIG. 4C-2.
図において、位相比較器（１）、ローパスフィルタ（２
）、ＰＷＢコンパレータ（３）、三角波発生回路（４）
、オア回路（５）、トランジスタ（６）、直流モータ（
７）、及びエンコーダ（８）により直流モータ（７）の
回転数をコントロールする閉ループを構成する。また定
電流コンパレータ（９）、電流検出抵抗（１０）、アン
ド回路０１）、ＣＰＵ（１２１により定電流の制御を行
う電流制御回路を構成する。In the figure, a phase comparator (1), a low-pass filter (2)
), PWB comparator (3), triangular wave generation circuit (4)
, OR circuit (5), transistor (6), DC motor (
7) and the encoder (8) form a closed loop that controls the rotation speed of the DC motor (7). Further, a constant current comparator (9), a current detection resistor (10), an AND circuit 01), and a CPU (121) constitute a current control circuit that controls a constant current.
今、直流モータを起動しようとする時は、ＣＰＵ（１２
１の出力をオンとしておく。直流モータ（７）は回転せ
ず、エンコーダ（う）の出力は零であるので、この出力
と基準信号とは、位相比較器’ｌ）で比較され、そのオ
ン出力は、オア回路（５）を介して、トラン４：スタ（
６）をオンする。Now, when trying to start a DC motor, the CPU (12
Leave output 1 on. Since the DC motor (7) does not rotate and the output of the encoder (U) is zero, this output and the reference signal are compared by the phase comparator (l), and the ON output is output from the OR circuit (5). Via Tran 4: Star (
6) Turn on.
それによって、直流モータ（７）が回転を始めるが、こ
の時、大きな起動電流が電流検出抵抗（１０）を介して
流れる。この電位の上昇は、定電流コンパレータ（９）
により基準電位と比較され、アンド回路（１１１に信号
を入力するので、アンド回路０１）はオン状態となる。As a result, the DC motor (7) starts rotating, but at this time, a large starting current flows through the current detection resistor (10). This increase in potential is caused by the constant current comparator (9)
Since the signal is input to the AND circuit (111), the AND circuit 01 is turned on.
この時、オア回路（５）は、Ｐ Ｗ、 Ｂコンパレ・−
タ（３）の出力を、電流制限回路の制限電流（＝対応し
た、アンド回路（１１１の出力分に抑制された信号をト
ランジスタ（６）に入力するので、直流モータ（７）に
流れる電流は制限電流にカットされる。起動完了後は、
ＣＰＵｕ２１の出力をオフにするとアンド回路（１１）
はオフとなり電流制限回路をオフ状態；二する。すると
、オア回路（５）はエンコ・−ダ（８）の出力（＝応じ
た出力をトランジスタ（６）に入力し、以後は直流モー
タ（７）の回転数をコントロールする閉ループのみの制
御で動作する。At this time, the OR circuit (5) is PW, B comparator -
The current flowing through the DC motor (7) is The current is cut to the limit.After startup is complete,
When the output of CPUu21 is turned off, the AND circuit (11)
is turned off and the current limiting circuit is turned off; Then, the OR circuit (5) inputs the output (= corresponding output) of the encoder (8) to the transistor (6), and from then on it operates only with closed loop control that controls the rotation speed of the DC motor (7). do.
以上説明した様に、本発明によれば、直流モータの定常
運転時にピーク電流をカットすることがないので精度の
高い速度制御を行うことができると共にパワートランジ
スタの破壊を防止できる効賽ゾ）−ふ２が−As explained above, according to the present invention, since the peak current is not cut during steady operation of the DC motor, highly accurate speed control can be performed and damage to the power transistor can be prevented. F2 is-
第１図は従来の制御装置の回路図、第２図は従来の制御
装置（：おける回転数と電流の波形図、第３図は従来の
制御方式のまま大きな負荷をかけた場合の回転数と電流
の波形図、第４図は本発明による制御装置の回路図であ
る。
符号説明Figure 1 is a circuit diagram of a conventional control device, Figure 2 is a waveform diagram of the rotation speed and current in a conventional control device, and Figure 3 is a diagram of the rotation speed when a large load is applied using the conventional control system. and a current waveform diagram, and FIG. 4 is a circuit diagram of a control device according to the present invention.
Claims (1)
方式において、直流モータの始動時の特定時間に限り、
始動電流値を制限する電流制限回路を作動させ、その後
は前記電流制限回路をオフとする様にしたことを特徴と
する複写機駆動制御装置。In a control method that limits the starting and current value of a DC motor for driving a copying machine, only for a specific time when starting the DC motor,
A copying machine drive control device, characterized in that a current limiting circuit for limiting a starting current value is activated, and thereafter the current limiting circuit is turned off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58202711A JPS6096186A (en) | 1983-10-31 | 1983-10-31 | Controller for driving copying machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58202711A JPS6096186A (en) | 1983-10-31 | 1983-10-31 | Controller for driving copying machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6096186A true JPS6096186A (en) | 1985-05-29 |
Family
ID=16461882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58202711A Pending JPS6096186A (en) | 1983-10-31 | 1983-10-31 | Controller for driving copying machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6096186A (en) |
-
1983
- 1983-10-31 JP JP58202711A patent/JPS6096186A/en active Pending
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