JPH0347069B2 - - Google Patents
Info
- Publication number
- JPH0347069B2 JPH0347069B2 JP60029617A JP2961785A JPH0347069B2 JP H0347069 B2 JPH0347069 B2 JP H0347069B2 JP 60029617 A JP60029617 A JP 60029617A JP 2961785 A JP2961785 A JP 2961785A JP H0347069 B2 JPH0347069 B2 JP H0347069B2
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- capacitor
- thyristor
- comparator
- motor
- 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
Classifications
-
- 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
- H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
- H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual DC dynamo-electric motor by varying field or armature current
- H02P7/18—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual DC dynamo-electric motor by varying field or armature current by master control with auxiliary power
- H02P7/24—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual DC dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices
- H02P7/28—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual DC dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices
- H02P7/285—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual DC dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only
- H02P7/292—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual DC dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only using static converters, e.g. AC to DC
- H02P7/295—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual DC dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only using static converters, e.g. AC to DC of the kind having one thyristor or the like in series with the power supply and the motor
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Direct Current Motors (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明はモータの回転数を下げた状態でトルク
が変動しても可能な限り回転数を安定化させるこ
とができるモータの回転数制御装置に関するもの
である。[Detailed Description of the Invention] Industrial Application Field The present invention relates to a motor rotation speed control device that can stabilize the rotation speed as much as possible even if the torque fluctuates while the motor rotation speed is lowered. It is.
従来の技術
従来のこの種のモータの回転数制御装置は第３
図に示すような回路構成となつていた。すなわ
ち、交流電源１の両端に接続された全波整流器２
の直流出力に直流モータ３とサイリスタ４が接続
されている。このサイリスタ４の両端には直列に
抵抗５とコンデンサ６が接続されており、サイリ
スタ４がオフしていると、コンデンサ６は抵抗５
を介して充電され、所定の電圧になると、コンデ
ンサ６の一端とサイリスタ４のゲート間に接続さ
れているダイアツク７を介して、コンデンサ６の
電荷は放電される。Conventional technology The conventional rotation speed control device for this type of motor is
The circuit configuration was as shown in the figure. That is, a full-wave rectifier 2 connected to both ends of an AC power supply 1
A DC motor 3 and a thyristor 4 are connected to the DC output. A resistor 5 and a capacitor 6 are connected in series to both ends of the thyristor 4, and when the thyristor 4 is off, the capacitor 6 is connected to the resistor 5.
When the capacitor 6 reaches a predetermined voltage, the charge in the capacitor 6 is discharged via a diode 7 connected between one end of the capacitor 6 and the gate of the thyristor 4.
すなわち、第４図のように、サイリスタ４のア
ノードのＡ点の電圧がほぼサイン波形に準ずる波
形で印加されると、コンデンサ６の電圧Ｂ点は
徐々に増加し、ダイアツク７のブレーク電圧を
VB1とすると、電源電圧の零点からT1の時間で、
ダイアツク７がオンし、かつサイリスタ４もオン
して、モータ３を位相制御することになる。 That is, as shown in FIG. 4, when the voltage at point A of the anode of thyristor 4 is applied in a waveform approximately conforming to a sine waveform, the voltage at point B of capacitor 6 gradually increases, causing the break voltage of diac 7 to rise.
Assuming V B1 , in time T 1 from the zero point of the power supply voltage,
The dial 7 is turned on, and the thyristor 4 is also turned on to control the phase of the motor 3.
このようにモータ３の回転数を下げた状態でモ
ータ３のトルクが変動しても、コンデンサ６の充
電電圧を、電源電圧からモータ３の逆起電圧を引
いたものにすることにより、回転数を一定化しよ
うとする回路構成となつている。 Even if the torque of the motor 3 fluctuates when the rotation speed of the motor 3 is lowered, the rotation speed can be reduced by setting the charging voltage of the capacitor 6 to the power supply voltage minus the back electromotive force of the motor 3. The circuit configuration is designed to keep the value constant.
発明が解決しようとする問題点
このような従来の回路においては、上記の例よ
りもさらに回転数を下げようとすると、回転数が
不安定になるという問題点が生じる。すなわち、
第４図における所定の電圧をVB1からVB2に上げ
ると、Ｂ点の電圧の上昇率は徐々に減つてゆくの
で、VB2の少しの変動がT2の時間の大きな変動に
つながる。すなわち、不安定な動作につながるも
のである。Problems to be Solved by the Invention In such a conventional circuit, if an attempt is made to lower the rotational speed further than in the above example, a problem arises in that the rotational speed becomes unstable. That is,
When the predetermined voltage in FIG. 4 is increased from V B1 to V B2 , the rate of increase in the voltage at point B gradually decreases, so a small variation in V B2 leads to a large variation in the time of T 2 . In other words, this leads to unstable operation.
本発明は上記の問題点を解消するためになされた
もので、回転数を下げた状態においても回転数を
安定化させることができるモータの回転数制御装
置を提供することを目的とする。The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a motor rotation speed control device that can stabilize the rotation speed even when the rotation speed is lowered.
問題点を解決するための手段
上記問題点を解決するために本発明は、サイリ
スタの両端に印加される電圧により充電される第
１のコンデンサと、この第１のコンデンサの電圧
と所定の第１の電圧とを比較する第１の比較器
と、この第１の比較器の出力により充電が開始さ
れる第２のコンデンサと、この第２のコンデンサ
の電圧と所定の第２の電圧とを比較する第２の比
較器と、この第２の比較器の出力に接続され前記
サイリスタのゲートをトリガするトリガ回路とを
備えたものである。Means for Solving the Problems In order to solve the above problems, the present invention provides a first capacitor charged by a voltage applied across a thyristor, a voltage of this first capacitor and a predetermined first capacitor. a first comparator that compares the voltage of and a trigger circuit connected to the output of the second comparator to trigger the gate of the thyristor.
作 用
上記構成によれば、回転数を下げるためにサイ
リスタを実際にトリガする時間が電源電圧の零点
より相当遅くなつても、トリガ時間の決定は遅延
時間の分だけ早い時点でなされるため、安定した
回転数制御を行なうことができるものである。Effect According to the above configuration, even if the time to actually trigger the thyristor to lower the rotation speed is considerably later than the zero point of the power supply voltage, the trigger time is determined at a point earlier by the delay time. This allows stable rotational speed control.
実施例
以下、本発明の一実施例を添付図面にもとづい
て説明する。第１図は本発明のモータの回転数制
御装置における回路図を示したもので、この第１
図において、１１は交流電源で、この交流電源１
１の両端には全波整流器１２が接続され、かつこ
の全波整流器１２の直流出力には直流モータ１３
とサイリスタ１４が直列に接続されている。Embodiment Hereinafter, an embodiment of the present invention will be described based on the accompanying drawings. FIG. 1 shows a circuit diagram of the motor rotation speed control device of the present invention.
In the figure, 11 is an AC power supply, and this AC power supply 1
A full-wave rectifier 12 is connected to both ends of 1, and a DC motor 13 is connected to the DC output of this full-wave rectifier 12.
and thyristor 14 are connected in series.
前記サイリスタ１４の両端に直列に接続された
ダイオード１５と抵抗１６を介した第１のコンデ
ンサ１７は、サイリスタ１４がオフしていると
き、電源電圧からモータ１３の逆起電力を引いた
電圧により充電される。この第１のコンデンサ１
７の電圧が、抵抗１８，１９で決定される所定の
電圧になると、第１の比較器２０の出力がLow
からHighにかわり、トリガのタイミングを決定
する。 A first capacitor 17 connected in series to both ends of the thyristor 14 via a diode 15 and a resistor 16 is charged by a voltage obtained by subtracting the back electromotive force of the motor 13 from the power supply voltage when the thyristor 14 is off. be done. This first capacitor 1
7 reaches a predetermined voltage determined by resistors 18 and 19, the output of the first comparator 20 becomes Low.
It changes from High to High and determines the trigger timing.
この第１の比較器２０の出力がHighになると、
抵抗２１を介して第２のコンデンサ２２が充電を
開始し、そしてこの第２のコンデンサ２２の電圧
が、抵抗２３，２４により決定される所定の電圧
より高くなると、第２の比較器２５の出力は
LowからHighに変化する。この変化するまでの
時間が遅延時間である。 When the output of this first comparator 20 becomes High,
When the second capacitor 22 starts charging via the resistor 21 and the voltage of this second capacitor 22 becomes higher than a predetermined voltage determined by the resistors 23 and 24, the output of the second comparator 25 teeth
Changes from Low to High. The time until this change occurs is the delay time.
この第２の比較器２５の出力がLowからHigh
にかわると、トリガ回路２６が駆動され、サイリ
スタ１４がトリガされる。すなわち、第２の比較
器２５の出力がLowからHighにかわると、抵抗
２７，抵抗２８を介してサイリスタ１４のゲート
に＋Vccより電流が流れ、サイリスタ１４がトリ
ガされる。このサイリスタ１４がトリガされると
第１のコンデンサ１７の電荷はダイオード２９を
介して放電され、次の電源サイクルにおける位相
制御動作に対して待機する。 The output of this second comparator 25 changes from Low to High.
Then, the trigger circuit 26 is driven and the thyristor 14 is triggered. That is, when the output of the second comparator 25 changes from Low to High, a current flows from +Vcc to the gate of the thyristor 14 via the resistor 27 and the resistor 28, and the thyristor 14 is triggered. When this thyristor 14 is triggered, the charge on the first capacitor 17 is discharged via the diode 29 and is ready for phase control operation in the next power cycle.
この時の各部の電圧を第２図に示すが、第１の
コンデンサ１７の電圧が所定の電圧VDより高く
なると、第２のコンデンサ２２の充電が開始さ
れ、この電圧が所定の電圧VEより高くなるとサ
イリスタ１４をトリガする。このトリガ時点で
は、Ｃ点の電圧は下降しており、Ｄ点の電圧はほ
とんど上昇していないので、このＤ点でトリガを
決定すると、動作は不安定になるが、本発明にお
いては、もつと早い時点、すなわちＣ点の電圧が
まだ上昇している時点でトリガタイミングを決定
しているため、非常に安定した制御動作を得るこ
とができる。 The voltage of each part at this time is shown in FIG. 2. When the voltage of the first capacitor 17 becomes higher than the predetermined voltage V D , charging of the second capacitor 22 is started, and this voltage becomes the predetermined voltage V E When it is higher, it triggers the thyristor 14. At this trigger point, the voltage at point C has fallen and the voltage at point D has hardly increased, so if the trigger is determined at point D, the operation will become unstable. Since the trigger timing is determined at an early point in time, that is, at a point when the voltage at point C is still rising, a very stable control operation can be obtained.
また、第１のコンデンサ１７を充電させる電圧
は、電源電圧からモータ１３の逆起電力を引いた
電圧になつているため、モータ１３のトリガ変動
による影響も少なくなるものである。 Further, since the voltage for charging the first capacitor 17 is the voltage obtained by subtracting the back electromotive force of the motor 13 from the power supply voltage, the influence of trigger fluctuations of the motor 13 is reduced.
発明の効果
以上のように本発明によれば、モータ直列に接
続されたサイリスタの両端に印加される電圧によ
り充電される第１のコンデンサと、この第１のコ
ンデンサの電圧と所定の第１の電圧とを比較する
第１の比較器の出力により充電が開始される第２
のコンデンサと、この第２のコンデンサの電圧と
所定の第２の電圧とを比較する第２の比較器と、
この第２の比較器の出力側に接続されサイリスタ
のゲートをトリガするトリガ回路とを備えたか
ら、サイリスタの両端に印加される電源電圧とモ
ータの逆起電圧との差の電圧により第１のコンデ
ンサが充電され、電源の毎半サイクルごとにサイ
リスタがトリガされる位相が決定され、負荷変動
に対して応答速度のはやいモータの回転数制御装
置が実現でき、しかも、モータの回転数を下げる
ためにサイリスタをトリガする位相が遅れても、
トリガ位相の決定は第２のコンデンサの充電時間
により定まる遅延時間だけはやい時点でなされる
ため、電源電圧のピークまでにトリガ位相を決定
することができて、モータの回転数を下げた状態
でも安定した回転数制御を行なうことができ、ま
たモータのトリガ変動があつても安定した制御を
行なうことができるものである。Effects of the Invention As described above, according to the present invention, the first capacitor is charged by the voltage applied across the thyristor connected in series with the motor, and the voltage of the first capacitor and the predetermined first capacitor are charged. The charging is started by the output of the first comparator, which compares the voltage with the second
a second comparator that compares the voltage of the second capacitor with a predetermined second voltage;
Since the trigger circuit is connected to the output side of the second comparator and triggers the gate of the thyristor, the voltage of the difference between the power supply voltage applied across the thyristor and the back electromotive force of the motor is used to trigger the first capacitor. is charged, and the phase at which the thyristor is triggered is determined for every half cycle of the power supply, making it possible to realize a motor rotation speed control device that responds quickly to load fluctuations, and also to reduce the motor rotation speed. Even if the phase that triggers the thyristor is delayed,
Since the trigger phase is determined as early as the delay time determined by the charging time of the second capacitor, the trigger phase can be determined before the peak of the power supply voltage, making it stable even when the motor rotation speed is low. It is possible to perform stable rotation speed control even when the motor trigger fluctuates.
第１図は本発明の一実施例を示すモータの回転
数制御装置の回路図、第２図は同制御装置の各部
の電圧波形図、第３図は従来のモータの回転数制
御装置の回路図、第４図は同制御装置の各部の電
圧波形図である。
１１……交流電源、１２……全波整流器、１３
……モータ、１４……サイリスタ、１７……第１
のコンデンサ、２０……第１の比較器、２２……
第２のコンデンサ、２５……第２の比較器、２６
……トリガ回路。
Fig. 1 is a circuit diagram of a motor rotation speed control device showing an embodiment of the present invention, Fig. 2 is a voltage waveform diagram of each part of the control device, and Fig. 3 is a circuit diagram of a conventional motor rotation speed control device. 4 are voltage waveform diagrams of various parts of the control device. 11...AC power supply, 12...Full wave rectifier, 13
...Motor, 14...Thyristor, 17...1st
capacitor, 20...first comparator, 22...
Second capacitor, 25...Second comparator, 26
...Trigger circuit.
Claims (1)
する全波整流器と、この全波整流器の直流出力端
子の両端に直列に接続されたモータ及びサイリス
タと、このサイリスタの両端に印加される電圧に
より充電される第１のコンデンサと、この第１の
コンデンサの電圧と所定の第１の電圧とを比較す
る第１の比較器と、この第１の比較器の出力によ
り充電が開始される第２のコンデンサと、この第
２のコンデンサの電圧と所定の第２の電圧とを比
較する第２の比較器と、この第２の比較器の出力
側に接続され前記サイリスタのゲートをトリガす
るトリガ回路とを備えたモータの回転数制御装
置。1. A full-wave rectifier connected to both ends of an AC power source and converting alternating current to direct current, a motor and a thyristor connected in series to both ends of the DC output terminal of this full-wave rectifier, and a voltage applied to both ends of this thyristor. A first capacitor to be charged, a first comparator that compares the voltage of the first capacitor with a predetermined first voltage, and a second capacitor whose charging is started by the output of the first comparator. a second comparator that compares the voltage of the second capacitor with a predetermined second voltage, and a trigger circuit that is connected to the output side of the second comparator and triggers the gate of the thyristor. A motor rotation speed control device equipped with
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60029617A JPS61191293A (en) | 1985-02-18 | 1985-02-18 | Rotating speed controller of motor |
| DE3690071A DE3690071C2 (en) | 1985-02-18 | 1986-02-13 | |
| AU55189/86A AU573969B2 (en) | 1985-02-18 | 1986-02-13 | Motor speed control apparatus |
| US06/928,275 US4748389A (en) | 1985-02-18 | 1986-02-13 | Motor speed control apparatus |
| DE19863690071 DE3690071T (en) | 1985-02-18 | 1986-02-13 | |
| PCT/JP1986/000063 WO1986005042A1 (en) | 1985-02-18 | 1986-02-13 | Revolution number control apparatus for motors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60029617A JPS61191293A (en) | 1985-02-18 | 1985-02-18 | Rotating speed controller of motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61191293A JPS61191293A (en) | 1986-08-25 |
| JPH0347069B2 true JPH0347069B2 (en) | 1991-07-18 |
Family
ID=12281036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60029617A Granted JPS61191293A (en) | 1985-02-18 | 1985-02-18 | Rotating speed controller of motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61191293A (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5370323A (en) * | 1976-12-03 | 1978-06-22 | Ryobi Ltd | Speed control circuit of universal motor |
-
1985
- 1985-02-18 JP JP60029617A patent/JPS61191293A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61191293A (en) | 1986-08-25 |
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