JP2526548Y2 - Motor speed control device - Google Patents
Motor speed control deviceInfo
- Publication number
- JP2526548Y2 JP2526548Y2 JP1989110713U JP11071389U JP2526548Y2 JP 2526548 Y2 JP2526548 Y2 JP 2526548Y2 JP 1989110713 U JP1989110713 U JP 1989110713U JP 11071389 U JP11071389 U JP 11071389U JP 2526548 Y2 JP2526548 Y2 JP 2526548Y2
- Authority
- JP
- Japan
- Prior art keywords
- rotation
- motor
- current
- power supply
- detection resistor
- 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 - Lifetime
Links
Description
【考案の詳細な説明】 産業上の利用分野 本考案は、ズーム機能を有する複写機の光学系駆動等
に用いられるモータの速度制御装置に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speed control device for a motor used for driving an optical system of a copying machine having a zoom function.
従来の技術 複写機の光学系駆動に用いられるモータの速度制御に
はPLL制御が用いられている。モータのPLL制御範囲は複
写機のズーム範囲に比例することが必要で、そのズーム
範囲は正転時においては、1:4程度である。また、逆転
時においても停止精度を向上させるために、PLL制御を
用いている。また、時間当りの複写枚数を多くするため
逆転時の速度を高速化しており、この場合1:10以上の広
範囲のPLL制御範囲が必要となってきている。2. Description of the Related Art PLL control is used for controlling the speed of a motor used for driving an optical system of a copying machine. The PLL control range of the motor needs to be proportional to the zoom range of the copier, and the zoom range is about 1: 4 during normal rotation. Also, PLL control is used in order to improve the stopping accuracy even at the time of reverse rotation. In addition, the speed at the time of reverse rotation is increased in order to increase the number of copies per time. In this case, a wide PLL control range of 1:10 or more is required.
以下図面を参照しながら、上述した従来のモータの制
御装置の一例について説明する。Hereinafter, an example of the above-described conventional motor control device will be described with reference to the drawings.
第３図において、モータ９に取付けられた回転検出器
10（例えば周波数発電器やロータリーエンコーダ等で以
下FGと略す）の信号と基準クロック信号１は速度比較回
路３−1,位相比較回路３−２に入力され、速度偏差出力
及び位相偏差出力が得られる。速度比較出力と位相比較
出力は加算平滑回路３−３にて加算平滑され誤差信号を
得る。加算抵抗R1,R2……Rnと並列に接続されたアナロ
グスイッチSW1,SW2……SWnはゲイン切替信号13とスイッ
チ選択回路14にてオン，オフされ、加算平滑回路のゲイ
ンを切替える。そしてこの誤差信号と正逆切替信号２の
信号が駆動回路４に入力されパワー回路５のパワー素子
Q1〜Q4をオン，オフさせる。このとき、電流制御回路８
にて駆動回路４を遮断しパワー素子Q1〜Q4の過電流保護
を行っている。In FIG. 3, a rotation detector attached to the motor 9
A signal 10 (for example, a frequency generator or a rotary encoder, hereinafter abbreviated as FG) and a reference clock signal 1 are input to a speed comparison circuit 3-1 and a phase comparison circuit 3-2 to obtain a speed deviation output and a phase deviation output. Can be The speed comparison output and the phase comparison output are added and smoothed by the addition smoothing circuit 3-3 to obtain an error signal. The analog switches SW 1 , SW 2 ... SWn connected in parallel with the addition resistors R 1 , R 2 ... Rn are turned on and off by the gain switching signal 13 and the switch selection circuit 14 to switch the gain of the addition smoothing circuit. . The error signal and the forward / reverse switching signal 2 are input to the drive circuit 4 and the power element of the power circuit 5
The Q 1 ~Q 4 on, is turned off. At this time, the current control circuit 8
Doing overcurrent protection interrupts the driving circuit 4 power element Q 1 to Q 4 at.
第４図に複写機の運転パターンを示す。時間あたりの
複写枚数は、正転と逆転の速度とその移行時間によって
決定される。FIG. 4 shows an operation pattern of the copying machine. The number of copies per time is determined by the forward and reverse rotation speeds and the transition time.
考案が解決しようとする課題 しかしながら上記の様な構成では、時間あたりの複写
枚数を増やすためには逆転時の速度を増さなければなら
ず、広範囲のPLL制御範囲が必要とする。However, in the above configuration, in order to increase the number of copies per time, the speed at the time of reverse rotation must be increased, and a wide PLL control range is required.
直流モータの回転速度はモータの印加電圧に比例する
から、回転速度が高くなると誤差信号の値も大きくな
る。速度偏差出力，位相偏差出力は一定であるから回転
速度に比例して加算平滑回路のゲインを変える必要があ
り装置が大きくなる。Since the rotation speed of the DC motor is proportional to the voltage applied to the motor, the value of the error signal increases as the rotation speed increases. Since the speed deviation output and the phase deviation output are constant, it is necessary to change the gain of the addition smoothing circuit in proportion to the rotation speed, and the device becomes large.
また、正転時と逆転時の電流制限値が同じためトルク
も同じ値で制限され正転から逆転に移行するのに時間が
かかるという問題点を有していた。In addition, since the current limit value at the time of forward rotation and the current limit value at the time of reverse rotation are the same, the torque is also limited by the same value, and there is a problem that it takes time to shift from normal rotation to reverse rotation.
本考案は上記問題点に鑑み、安価で広範囲なPLL制御
が容易に得られ、かつ正転から逆転への移行時間の短縮
を図ることができるモータの速度制御装置を提供するも
のである。SUMMARY OF THE INVENTION In view of the above problems, the present invention provides a motor speed control device capable of easily obtaining a low-cost and wide-range PLL control and shortening a transition time from forward rotation to reverse rotation.
課題を解決するための手段 上記課題を解決するために、本考案のモータの速度制
御装置は、正転用の第１の電源電圧と第１の電源電圧値
より高い逆転用の第２の電源電圧とを備えかつ、正転用
の第１の電流検出抵抗と第１の電流検出抵抗より小さな
値の逆転用の第２の電流検出抵抗とを備えたものであ
る。Means for Solving the Problems In order to solve the above problems, a motor speed control device according to the present invention includes a first power supply voltage for normal rotation and a second power supply voltage for reverse rotation higher than the first power supply voltage value. And a first current detection resistor for normal rotation and a second current detection resistor for reverse rotation having a smaller value than the first current detection resistor.
作用 本考案は、上記した構成によって、逆転時の電源電圧
を上げることにより、回転速度が高くなることによって
変化する誤差信号の変化量が抑えられるため加算平滑回
路のゲインを変えることなく広範囲のPLL制御範囲を
得、かつ逆転時の電流制限値を上げることにより逆転時
のトルクを上げ、正転から逆転への移行時間を短縮する
ことができるものである。Effect of the Invention According to the present invention, by increasing the power supply voltage at the time of reverse rotation by the above-described configuration, the amount of change of the error signal that changes due to the increase in the rotation speed is suppressed, so that a wide range of PLL can be used without changing the gain of the addition smoothing circuit. By obtaining the control range and increasing the current limit value at the time of reverse rotation, the torque at the time of reverse rotation can be increased, and the transition time from normal rotation to reverse rotation can be shortened.
実施例 以下、本考案の一実施例のモータの速度制御方式につ
いて図面を参照しながら説明する。Hereinafter, a motor speed control method according to an embodiment of the present invention will be described with reference to the drawings.
第１図において、１は基準クロック信号、２は正逆切
替信号、３はPLL制御回路、４は駆動回路、５はパワー
回路、６は第１の電流検出抵抗、７は第２の電流検出抵
抗、８は電流制限回路、９はモータ、10は回転検出器
（FG）、11は第１の電源、12は第２の電源、Q1,Q2,Q3,Q
4はパワー素子である。In FIG. 1, 1 is a reference clock signal, 2 is a forward / reverse switching signal, 3 is a PLL control circuit, 4 is a drive circuit, 5 is a power circuit, 6 is a first current detection resistor, and 7 is a second current detection A resistor, 8 is a current limiting circuit, 9 is a motor, 10 is a rotation detector (FG), 11 is a first power supply, 12 is a second power supply, Q 1 , Q 2 , Q 3 , Q
4 is a power element.
第１図において、正逆切替信号２により正転信号が駆
動回路４に入力されるとパワー回路５のパワー素子Q1,Q
4がオンし、第１図の電源11から電圧が印加され、モー
タ９に起動電流が流れる。このとき、第１の電流検出抵
抗６にて電流を検出し、電流制限回路８にて起動電流を
制限する。また、正逆切替信号２により逆転信号が駆動
回路４に入力されるとパワー回路５のパワー素子Q2,Q3
がオンし、第２の電源12から電圧が印加されモータ９に
プラギング電流が流れる。このとき、第２の電流検出抵
抗７にて、検出電圧Ｖに変換する。検出電圧Ｖは検出抵
抗７の値をR,モータ電流をＩとすると、Ｖ＝RIで求めら
れる。第２の電流検出抵抗７は第１の電流検出抵抗６よ
り小さな値とする。ゆえに、検出電圧Ｖは逆転時は正転
時より小さな値となる。正転時，逆転時ともに同じ検出
電圧Ｖで電流制限を行うため、逆転時の電流は正転時の
電流よりも大きくなる。従って逆転時のトルクは、正転
の場合よりも大きくなり正転から逆転へ移行する時間の
短縮が図ることができる。In FIG. 1, when a forward rotation signal is input to the drive circuit 4 by the forward / reverse switching signal 2, the power elements Q 1 , Q
4 is turned on, a voltage is applied from the power supply 11 in FIG. 1, and a starting current flows through the motor 9. At this time, the current is detected by the first current detection resistor 6 and the starting current is limited by the current limiting circuit 8. When a reverse signal is input to the drive circuit 4 by the forward / reverse switching signal 2, the power elements Q 2 and Q 3 of the power circuit 5 are output.
Is turned on, a voltage is applied from the second power supply 12, and a plugging current flows through the motor 9. At this time, the voltage is converted to a detection voltage V by the second current detection resistor 7. Assuming that the value of the detection resistor 7 is R and the motor current is I, the detection voltage V is obtained by V = RI. The second current detection resistor 7 has a smaller value than the first current detection resistor 6. Therefore, the detection voltage V has a smaller value during reverse rotation than during normal rotation. Since the current is limited at the same detection voltage V both in the forward rotation and the reverse rotation, the current in the reverse rotation is larger than the current in the forward rotation. Therefore, the torque at the time of reverse rotation is larger than that at the time of normal rotation, and the time required to shift from normal rotation to reverse rotation can be reduced.
複写機において通常、逆転時の速度は正転時の数倍で
あるから、第２の電源12の値を第１の電源11の値より、
数倍にすることにより、回転速度が数倍になることによ
って変化する誤差信号の変化量が抑えられるため、加算
平滑回路のゲインを切替えることなく、正転時から逆転
時まで広範囲のPLL制御範囲を得ることができる。第２
図に本考案による複写機の運転パターン図を示す。In a copier, the speed at the time of reverse rotation is usually several times that at the time of normal rotation, so that the value of the second power supply 12 is
By increasing the speed several times, the amount of change in the error signal that changes due to the rotation speed increasing several times is suppressed, so that the PLL control range is wide from forward rotation to reverse rotation without switching the gain of the addition smoothing circuit. Can be obtained. Second
FIG. 3 shows an operation pattern diagram of the copying machine according to the present invention.
考案の効果 以上のように本考案は、正転用の電源電圧と正転用の
電源電圧値より高い逆転用の電圧を設けることにより広
範囲のPLL制御範囲が得られ、正転用の電流制限抵抗と
正転用の電流検出抵抗より小さな値の逆転用の電流検出
抵抗を設けることにより逆転時の電流制限レベルを正転
時よりも大きくすることができ、正転から逆転への移行
時間を短縮することができる。Effect of the Invention As described above, the present invention provides a wide range of PLL control by providing a power supply voltage for forward rotation and a voltage for reverse rotation higher than the power supply voltage value for normal rotation, and provides a current limiting resistor for forward rotation and a positive current limiting resistor. By providing a current detection resistor for reverse rotation with a smaller value than the current detection resistor for diversion, the current limit level for reverse rotation can be made larger than that for normal rotation, and the transition time from normal rotation to reverse rotation can be shortened. it can.
第１図は本考案の実施例におけるモータの速度制御装置
のブロック図、第２図は本考案の制御装置を用いた複写
機の運転パターン図、第３図は従来のモータの速度制御
装置のブロック図、第４図は従来の制御装置を用いた複
写機の運転パターン図である。 １……基準クロック信号、２……正逆切替信号、３……
PLL制御回路、４……駆動回路、５……パワー回路、６
……第１の電流検出抵抗、７……第２の電流検出抵抗、
８……電流制限回路、９……モータ、10……回転検出器
（FG）、11……第１の電源、12……第２の電源、Q1,Q2,
Q3,Q4……パワー素子、３−１……速度比較回路、３−
２……位相比較回路、13……ゲイン切替信号、14……ス
イッチ選択回路、R1,R2……Rn抵抗、SW1,SW2……SWnア
ナログスイッチ。FIG. 1 is a block diagram of a motor speed control device according to an embodiment of the present invention, FIG. 2 is an operation pattern diagram of a copying machine using the control device of the present invention, and FIG. 3 is a conventional motor speed control device. FIG. 4 is a block diagram, and FIG. 4 is an operation pattern diagram of a copying machine using a conventional control device. 1 ... reference clock signal, 2 ... forward / reverse switching signal, 3 ...
PLL control circuit, 4 ... Drive circuit, 5 ... Power circuit, 6
... A first current detection resistor, 7... A second current detection resistor,
8 ... current limiting circuit, 9 ... motor, 10 ... rotation detector (FG), 11 ... first power supply, 12 ... second power supply, Q 1 , Q 2 ,
Q 3 , Q 4 … Power element, 3-1… Speed comparison circuit, 3-
2 ...... phase comparison circuit, 13 ...... gain switching signal, 14 ...... switch selection circuit, R 1, R 2 ...... Rn resistor, SW 1, SW 2 ...... SWn analog switch.
Claims (2)
転検出器の出力と基準クロックの出力にてPLL制御を行
うPLL制御回路と、このPLL制御回路の出力と正逆切替信
号によりパワー素子を駆動する駆動回路と、正転時にモ
ータの電圧を印加する第１の電源と、逆転時にモータの
電圧を印加する第２の電源と、正転時のモータ電流を検
出する第１の電流検出抵抗と、逆転時のモータ電流を検
出する第２の電流検出抵抗とを備え、前記第２の電流検
出抵抗の値は、前記第１の電流検出抵抗の値より小さい
値とすることを特徴とするモータの速度制御装置。1. A rotation detector connected to a motor, a PLL control circuit for performing PLL control based on an output of the rotation detector and an output of a reference clock, and a power supplied by an output of the PLL control circuit and a forward / reverse switching signal. A drive circuit for driving the element, a first power supply for applying a motor voltage during forward rotation, a second power supply for applying a motor voltage during reverse rotation, and a first current for detecting a motor current during forward rotation A detection resistor; and a second current detection resistor for detecting a motor current at the time of reverse rotation, wherein a value of the second current detection resistor is smaller than a value of the first current detection resistor. The motor speed control device.
源電圧値より高電圧値とすることを特徴とする請求項１
記載のモータの速度制御装置。2. The voltage value of the second power supply is higher than the voltage value of the first power supply.
A motor speed control device as described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989110713U JP2526548Y2 (en) | 1989-09-21 | 1989-09-21 | Motor speed control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989110713U JP2526548Y2 (en) | 1989-09-21 | 1989-09-21 | Motor speed control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0350993U JPH0350993U (en) | 1991-05-17 |
| JP2526548Y2 true JP2526548Y2 (en) | 1997-02-19 |
Family
ID=31659235
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989110713U Expired - Lifetime JP2526548Y2 (en) | 1989-09-21 | 1989-09-21 | Motor speed control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2526548Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5558787A (en) * | 1978-10-24 | 1980-05-01 | Inoue Japax Res Inc | Dc-motor drive control device |
| JPS61161988A (en) * | 1985-01-11 | 1986-07-22 | Omron Tateisi Electronics Co | Servo motor drive device |
-
1989
- 1989-09-21 JP JP1989110713U patent/JP2526548Y2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5558787A (en) * | 1978-10-24 | 1980-05-01 | Inoue Japax Res Inc | Dc-motor drive control device |
| JPS61161988A (en) * | 1985-01-11 | 1986-07-22 | Omron Tateisi Electronics Co | Servo motor drive device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0350993U (en) | 1991-05-17 |
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