JPH0631394U - Electric motor start compensation device - Google Patents
Electric motor start compensation deviceInfo
- Publication number
- JPH0631394U JPH0631394U JP7331392U JP7331392U JPH0631394U JP H0631394 U JPH0631394 U JP H0631394U JP 7331392 U JP7331392 U JP 7331392U JP 7331392 U JP7331392 U JP 7331392U JP H0631394 U JPH0631394 U JP H0631394U
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- output
- positive output
- electric motor
- priority circuit
- 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.)
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- Motor And Converter Starters (AREA)
Abstract
(57)【要約】
【目的】Ｓ字加速の際、ゆるやかな起動が円滑に行われ
るようにする。
【構成】第１の設定器からの固定電圧と電動機からの帰
還電圧とを比較する第１の演算器と、この演算器の出力
電圧を入力し正出力のみを出力する第１の正出力優先回
路と、この第１の正出力優先回路の出力電圧と第２の設
定器からの固定電圧とを比較する第２の演算器と、この
第２の演算器の出力電圧を入力し正出力のみを出力する
第２の正出力優先回路とを備えて構成したものである。
(57) [Summary] [Purpose] During S-curve acceleration, ensure a smooth start-up. [Structure] A first arithmetic unit for comparing a fixed voltage from a first setter with a feedback voltage from an electric motor, and a first positive output priority for inputting an output voltage of this arithmetic unit and outputting only a positive output. Circuit, a second arithmetic unit for comparing the output voltage of the first positive output priority circuit with the fixed voltage from the second setting unit, and the output voltage of the second arithmetic unit is input and only the positive output is input. And a second positive output priority circuit for outputting
Description
【０００１】[0001]
本考案は、電動機の速度制御装置のうち、緩やかな加速特性を持つ装置、特に Ｓ字形の加速特性を持つ装置において、電動機の起動を円滑にする起動補償装置 に関するものである。 The present invention relates to a start compensation device for smooth starting of an electric motor in a speed control device for an electric motor, which has a gentle acceleration characteristic, particularly an S-shaped acceleration characteristic.
【０００２】[0002]
加速特性にＳ字形を持つ速度制御装置により電動機を起動する場合、電動機及 び電動機に結合された負荷装置の静止摩擦の影響により、円滑に起動しないとい う不具合があった。 このような不具合に対して、図２に示すようなＣＲ微分回路11の出力を起動補 償として、Ｓ字形の加速減器12の速度指令出力に加えることにより、起動時のみ 速度指令電圧を増加させ、電動機15を静止摩擦力より脱出させ、起動を円滑にし ようとする起動補償装置であった。なお、13は起動スイッチ、14は速度制御器、 16は回転数検出器、17，18は演算器である。 When the electric motor is started by the speed control device having an S-shaped acceleration characteristic, there is a problem that the electric motor and the load device connected to the electric motor do not start smoothly due to the static friction. In response to such a problem, the output of the CR differentiating circuit 11 as shown in FIG. 2 is added to the speed command output of the S-shaped acceleration reducer 12 as a startup compensation, and the speed command voltage is increased only at startup. The starting compensator was designed to allow the electric motor 15 to escape from the static friction force and to make the starting smooth. In addition, 13 is a start switch, 14 is a speed controller, 16 is a rotation speed detector, and 17 and 18 are arithmetic units.
【０００３】[0003]
しかしかような装置においては、次のような欠点があった。 ＣＲ微分回路を使用しているだけのため補償量の調整が難しく、補償量が小さ ければ起動が遅れ、補償量が大きければ起動遅れはないが、起動時の速度が零か ら滑らかに上昇するのでなく、いきなり加速するため、いずれにしても、Ｓ字加 速による衝撃のない起動をさせるように調整することが難しい。 本考案は、これらの欠点を解決するために考案されたもので、その目的とする ところは、Ｓ字加速の際、緩やかな起動が円滑に行われるようにする電動機の起 動補償装置を提供するものである。 However, such a device has the following drawbacks. It is difficult to adjust the compensation amount because only the CR differentiation circuit is used. If the compensation amount is small, the startup is delayed, and if the compensation amount is large, there is no startup delay, but the speed at startup increases smoothly from zero. Instead, it accelerates suddenly, so in any case, it is difficult to make adjustments so as to start without impact due to S-shaped acceleration. The present invention has been devised to solve these drawbacks, and an object thereof is to provide a start compensation device for an electric motor that allows smooth start-up during S-curve acceleration. To do.
【０００４】[0004]
つまり、その目的を達成するための手段は、第１の設定器からの固定電圧と帰 還回路の入力電圧とを比較し、この入力電圧が前記固定電圧より高いときのみ電 圧を出力する第１の正出力優先回路と、この出力電圧と第２の設定器からの固定 電圧とを比較し、この固定電圧が前記第１の正出力優先回路の出力電圧より高い ときのみ電圧を出力する第２の正出力優先回路より構成され、この出力を速度制 御器などを経てその信号を電動機に伝達するものである。 That is, the means for achieving the object is to compare the fixed voltage from the first setter with the input voltage of the return circuit, and output the voltage only when the input voltage is higher than the fixed voltage. The first positive output priority circuit is compared with the fixed voltage from the second setting device, and the voltage is output only when the fixed voltage is higher than the output voltage of the first positive output priority circuit. It is composed of two positive output priority circuits, and this output is transmitted to the motor through a speed controller or the like.
【０００５】[0005]
図１において、第１の設定器１からの固定電圧V1より、電動機の速度である入 力電圧Viの方が小さいときは、第１の正出力優先回路２の出力は零となるため、 第２の設定器３の固定電圧V3相当の電圧が第２の正出力優先回路４より出力され る。また、入力電圧Viのほうが大きいときは、第１の正出力優先回路２より電圧 が出力されるが、アンプ５の増幅度を充分大きくしておけば、第１の正出力優先 回路２の出力は固定電圧V3より大きくなるため、第２の正出力優先回路４の出力 は零となる。 入力電圧Viを電動機15の速度帰還電圧とし、固定電圧V1を静止摩擦より動摩擦 に移行する速度とし、固定電圧V3を補償量とすれば、第２の正出力優先回路４の 出力は電動機15の速度が零より、静止摩擦より動摩擦に移行する速度までの間出 力される。この第２の正出力優先回路4 の出力を、従来例と同様、Ｓ字形速度指 令出力に加えることで、起動時のみ速度指令電圧を増加させる。 In FIG. 1, when the input voltage Vi, which is the speed of the motor, is smaller than the fixed voltage V1 from the first setter 1, the output of the first positive output priority circuit 2 becomes zero. The voltage corresponding to the fixed voltage V3 of the setting device 3 of 2 is output from the second positive output priority circuit 4. Further, when the input voltage Vi is higher, the voltage is output from the first positive output priority circuit 2, but if the amplification degree of the amplifier 5 is set sufficiently large, the output of the first positive output priority circuit 2 Becomes larger than the fixed voltage V3, the output of the second positive output priority circuit 4 becomes zero. If the input voltage Vi is the speed feedback voltage of the motor 15, the fixed voltage V1 is the speed at which the static friction shifts to the dynamic friction, and the fixed voltage V3 is the compensation amount, the output of the second positive output priority circuit 4 is the output of the motor 15. It is output from a speed of zero to a speed at which static friction shifts to dynamic friction. By adding the output of the second positive output priority circuit 4 to the S-shaped speed command output as in the conventional example, the speed command voltage is increased only at the time of starting.
【０００６】[0006]
図１は本考案の一実施例を示す構成図であり、図中、図２と同符号のものは同 じ構成，機能を有す。 図１において、第１の設定器１からの固定電圧V1と電動機15からの帰還電圧Vi とを比較する第１の演算器６と、この演算器６の出力電圧を入力し正出力のみを 出力する第１の正出力優先回路２と、この第１の正出力優先回路２の出力電圧V2 と第２の設定器３からの固定電圧V3とを比較する第２の演算器７と、この第２の 演算器７の出力電圧を入力し正出力のみを出力する第２の正出力優先回路４とを 備え、この第２の正出力優先回路４の出力信号を演算器８や速度制御器９などを 介して電動機15に伝達するよう構成したものである。なお10はアンプである。 なお、本考案を使用する場合は、前述したように入力電圧Viとして、電動機の 速度帰還電圧を入力し、固定電圧V1を電動機15の負荷の摩擦が静止摩擦より動摩 擦に移行する速度とし、固定電圧V3を起動補償電圧とする。 FIG. 1 is a configuration diagram showing an embodiment of the present invention. In the figure, those having the same reference numerals as those in FIG. 2 have the same configuration and function. In FIG. 1, the first calculator 6 that compares the fixed voltage V1 from the first setter 1 with the feedback voltage Vi from the motor 15 and the output voltage of this calculator 6 are input and only positive output is output. The first positive output priority circuit 2, a second calculator 7 for comparing the output voltage V2 of the first positive output priority circuit 2 with the fixed voltage V3 from the second setting device 3, A second positive output priority circuit 4 that receives the output voltage of the second calculator 7 and outputs only a positive output. The output signal of the second positive output priority circuit 4 is supplied to the calculator 8 and the speed controller 9 It is configured to be transmitted to the electric motor 15 via, for example. 10 is an amplifier. When the present invention is used, the speed feedback voltage of the motor is input as the input voltage Vi as described above, and the fixed voltage V1 is set as the speed at which the friction of the load of the motor 15 shifts from static friction to dynamic friction. , Fixed voltage V3 is used as the start compensation voltage.
【０００７】 次に、かようなごとく構成された装置の動作について詳細に述べる。 入力電圧Viと固定電圧V1の比較出力を、第１の正出力優先回路２に通せば、電 動機15の速度が、電動機15の負荷の摩擦が静止摩擦より動摩擦に移行する速度よ り低いときは、正出力優先回路２の出力は零となるため、第２の正出力優先回路 ４は、固定電圧V3に相当する電圧を出力する。 また、電動機15の速度が、電動機15の負荷の摩擦が静止摩擦より動摩擦に移行 する速度より高いときは、アンプ５の増幅度を充分大きくしておけば、第１の正 出力優先回路２の出力は、固定電圧V3より大きくなるため、第２の正出力優先回 路４の出力は零となる。 以上のような第２の正出力優先回路４の出力を、加速特性にＳ字形を持つ速度 制御装置のＳ字形速度指令出力に加えれば、電動機15の速度が電動機15の負荷の 摩擦が静止摩擦より動摩擦に移行する速度より低いときのみ、速度制御装置の速 度設定入力に起動補償を加えることができる。また、電動機負荷装置の摩擦が動 摩擦になれば、摩擦力は小さくなるので、起動補償は不要であるため、第２の正 出力優先回路の出力も零となるようになっている。Next, the operation of the apparatus configured as above will be described in detail. When the comparison output of the input voltage Vi and the fixed voltage V1 is passed through the first positive output priority circuit 2, when the speed of the electric motor 15 is lower than the speed at which the load friction of the electric motor 15 shifts from the static friction to the dynamic friction. Since the output of the positive output priority circuit 2 becomes zero, the second positive output priority circuit 4 outputs a voltage corresponding to the fixed voltage V3. Further, when the speed of the electric motor 15 is higher than the speed at which the friction of the load of the electric motor 15 shifts from the static friction to the dynamic friction, if the amplification degree of the amplifier 5 is set sufficiently large, the first positive output priority circuit 2 Since the output becomes larger than the fixed voltage V3, the output of the second positive output priority circuit 4 becomes zero. If the output of the second positive output priority circuit 4 as described above is added to the S-shaped speed command output of the speed control device having an S-shaped acceleration characteristic, the speed of the electric motor 15 is the friction of the load of the electric motor 15 and the static friction. Activation compensation can be added to the speed setting input of the speed controller only when it is below the speed at which more dynamic friction is entered. Further, if the friction of the motor load device becomes dynamic friction, the frictional force becomes smaller, so starting compensation is not necessary, so that the output of the second positive output priority circuit becomes zero.
【０００８】[0008]
以上説明したように本考案によれば、固定電圧V1を調整することにより、速度 補償をすべき速度を、また、固定電圧V3を調整することにより、速度補償量をそ れぞれ別々に調整できるため調整が簡単となる。また。ＣＲ微分回路とは違い、 補償量が時間的に一定なため、緩やかな加速特性を持つ場合、特に、Ｓ字形の加 速特性を持つ場合において、衝撃のない滑らかな起動をさせるように調整するこ とが容易となる。 As described above, according to the present invention, the fixed voltage V1 is adjusted to adjust the speed to be speed-compensated, and the fixed voltage V3 is adjusted to adjust the speed compensation amount separately. Because it is possible, adjustment becomes easy. Also. Unlike the CR differentiating circuit, the compensation amount is constant over time, so adjustment is performed to make a smooth start without impact, when the acceleration characteristic is gentle, especially when it has an S-shaped acceleration characteristic. This will be easier.
【０００９】[0009]
【図１】図１は本考案の一実施例を示す構成図である。FIG. 1 is a block diagram showing an embodiment of the present invention.
【図２】図２は従来の一例を示す構成図である。FIG. 2 is a configuration diagram showing a conventional example.
【００１０】[0010]
１ 第１の設定器 ２ 第１の正出力優先回路 ３ 第２の設定器 ４ 第２の正出力優先回路 ５ アンプ ６ 第１の演算器 ７ 第２の演算器 ８ 演算器 ９ 速度制御器 10 アンプ 1 1st setting device 2 1st positive output priority circuit 3 2nd setting device 4 2nd positive output priority circuit 5 Amplifier 6 1st computing unit 7 2nd computing unit 8 Computing unit 9 Speed controller 10 Amplifier
Claims (1)
らの帰還電圧とを比較する第１の演算器と、この第１の
演算器の出力電圧を入力し正出力のみを出力する第１の
正出力優先回路と、この第１の正出力優先回路の出力電
圧と第２の設定器からの固定電圧とを比較する第２の演
算器と、この第２の演算器の出力電圧を入力し正出力の
みを出力する第２の正出力優先回路とを備え、この第２
の正出力優先回路の出力信号を演算器や速度制御器など
を介して電動機に伝達するよう構成したことを特徴とす
る電動機の起動補償装置。1. A first arithmetic unit for comparing a fixed voltage from a first setter with a feedback voltage from an electric motor, and a first arithmetic unit for inputting an output voltage of the first arithmetic unit and outputting only a positive output. 1 positive output priority circuit, a second arithmetic unit for comparing the output voltage of the first positive output priority circuit and the fixed voltage from the second setting unit, and the output voltage of the second arithmetic unit. A second positive output priority circuit for inputting and outputting only the positive output;
A starting compensation device for an electric motor, characterized in that the output signal of the positive output priority circuit is transmitted to the electric motor through an arithmetic unit, a speed controller, and the like.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1992073313U JP2596521Y2 (en) | 1992-09-28 | 1992-09-28 | Motor start compensation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1992073313U JP2596521Y2 (en) | 1992-09-28 | 1992-09-28 | Motor start compensation device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0631394U true JPH0631394U (en) | 1994-04-22 |
| JP2596521Y2 JP2596521Y2 (en) | 1999-06-14 |
Family
ID=13514565
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1992073313U Expired - Fee Related JP2596521Y2 (en) | 1992-09-28 | 1992-09-28 | Motor start compensation device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2596521Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102036031B1 (en) * | 2017-03-06 | 2019-10-25 | 엘에스산전 주식회사 | Apparatus for controlling inverter |
-
1992
- 1992-09-28 JP JP1992073313U patent/JP2596521Y2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2596521Y2 (en) | 1999-06-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |