JPH1189284A - Controller of induction motor - Google Patents
Controller of induction motorInfo
- Publication number
- JPH1189284A JPH1189284A JP9245726A JP24572697A JPH1189284A JP H1189284 A JPH1189284 A JP H1189284A JP 9245726 A JP9245726 A JP 9245726A JP 24572697 A JP24572697 A JP 24572697A JP H1189284 A JPH1189284 A JP H1189284A
- Authority
- JP
- Japan
- Prior art keywords
- acceleration
- deceleration
- deceleration rate
- induction motor
- controller
- 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
Landscapes
- Control Of Ac Motors In General (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は誘導電動機の駆動す
る負荷に応じて、加速時間、減速時間を最適に制御する
制御装置に関する。The present invention relates to a control device for optimally controlling an acceleration time and a deceleration time according to a load driven by an induction motor.
【０００２】[0002]
【従来の技術】インバータによる誘導電動機の駆動にお
いては、加速時は出力電流が増加すると過電流となる前
に加速を止め、出力電流が減少すると再度加速するとい
う動作を繰り返し、減速時は主回路直流電圧が増加する
と過電圧となる前に減速を止め、主回路直流電圧が減少
すると再度減速するという動作を繰り返し、負荷に応じ
た加減速時間で運転するように調整している。図３に従
来の加減速動作の例を示す。図３において、（ａ）はイ
ンバータ出力電流、（ｂ）は主回路直流電圧、（ｃ）は
インバータの出力周波数を示している。Ｔaは加速時
間、Ｔdは減速時間で、インバータ出力電流、主回路直
流電圧が増減した場合に、インバータの出力周波数はそ
れぞれＴa、Ｔdにわたって階段状に変化している。この
従来の技術では、出力電流、主回路直流電圧共に、その
量しか見ていないため、出力周波数が階段状に変化し、
負荷の状態によっては加速、減速の制御が安定しない問
題があった。2. Description of the Related Art In driving an induction motor by an inverter, when the output current increases during acceleration, acceleration stops before an overcurrent occurs, and when the output current decreases, the operation is repeated to repeat acceleration. When the DC voltage increases, deceleration is stopped before an overvoltage occurs, and when the main circuit DC voltage decreases, the operation of decelerating again is repeated, and the operation is adjusted so as to operate with an acceleration / deceleration time according to the load. FIG. 3 shows an example of a conventional acceleration / deceleration operation. 3A shows the inverter output current, FIG. 3B shows the main circuit DC voltage, and FIG. 3C shows the output frequency of the inverter. T a is the acceleration time, T d is the deceleration time, when the inverter output current, the main circuit DC voltage is increased or decreased, respectively, the output frequency of the inverter is T a, varies stepwise over T d. In this conventional technology, the output current and the main circuit DC voltage both look at only the amount, so the output frequency changes stepwise,
There was a problem that the control of acceleration and deceleration was not stable depending on the load condition.
【０００３】また、特開平８−１７２７９７号公報に
は、電動機を任意の速度で回転させるインバータ装置に
おいて、負荷に関する情報を設定する負荷データ設定手
段と、この負荷データ設定手段で設定される負荷データ
を記録する負荷データ記録手段と、この負荷データ記録
手段で記録された前記負荷データに応じて、前記電動機
の加速時および減速時の加減速パターンを作成する加減
速パターン作成手段と、前記加減速パターンを記録する
加減速パターン記録手段と、この加減速パターン記録手
段に記録された前記加減速パターンと外部から与えられ
る速度指令とから、前記電動機の駆動速度を制御する出
力速度制御手段を備えたインバータ装置が開示されてい
る。これによれば、負荷の種類や大きさに応じた最適な
加減速動作が可能となる。ところが、この特開平８−１
７２７９７号公報に記載されたインバータ装置では、負
荷の状態が変動する場合、やはり加速、減速の制御が安
定しないという問題があった。Japanese Patent Application Laid-Open No. Hei 8-172797 discloses a load data setting means for setting information relating to a load in an inverter device for rotating an electric motor at an arbitrary speed, and a load data set by the load data setting means. Load data recording means for recording the acceleration and deceleration patterns at the time of acceleration and deceleration of the electric motor according to the load data recorded by the load data recording means; and An acceleration / deceleration pattern recording means for recording a pattern; and an output speed control means for controlling a driving speed of the electric motor based on the acceleration / deceleration pattern recorded on the acceleration / deceleration pattern recording means and a speed command given from outside. An inverter device is disclosed. According to this, the optimal acceleration / deceleration operation according to the type and size of the load can be performed. However, Japanese Patent Application Laid-Open No. Hei 8-1
In the inverter device described in Japanese Patent No. 72797, there is a problem that when the state of the load fluctuates, the control of acceleration and deceleration is not stable.
【０００４】[0004]
【発明が解決しようとする課題】そこで本発明は、滑ら
かかつ最適な加減速を可能とし、生産性を向上させるこ
とのできる誘導電動機の制御装置を提供することを目的
とする。SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a control device for an induction motor that enables smooth and optimal acceleration / deceleration and improves productivity.
【０００５】[0005]
【課題を解決するための手段】前記の課題を解決するた
め、本発明は、誘導電動機を任意の速度で回転させるイ
ンバータ装置を有する誘導電動機の制御装置において、
加減速時間、加減速レート調整開始レベル、加減速レー
ト調整ゲイン等のインバータパラメータを設定する運転
情報設定手段と、この運転情報設定手段で設定される情
報を記録する運転情報記録手段と、出力電流及び主回路
直流電圧の量に応じて加減速のレートを作成する第１の
加減速レート作成手段と、同じく出力電流及び主回路直
流電圧の傾きに応じて加減速のレートを作成する第２の
加減速レート作成手段と、これらの第１および第２の加
減速レート作成手段の出力をＰＩ制御するＰＩ制御器
と、決定された加減速レートと外部より与えられる速度
指令に基づいて、誘導電動機駆動速度を制御する出力速
度制御手段とを備えたものである。前記、第１および第
２の加減速レート作成手段を組み合わせた制御を行うこ
とにより、実際の誘導電動機の運転時において、より滑
らかで最適な加減速レートを作成することが可能とな
る。According to the present invention, there is provided a control device for an induction motor having an inverter device for rotating the induction motor at an arbitrary speed.
Operation information setting means for setting inverter parameters such as acceleration / deceleration time, acceleration / deceleration rate adjustment start level, acceleration / deceleration rate adjustment gain, operation information recording means for recording information set by the operation information setting means, and output current A first acceleration / deceleration rate creating means for creating an acceleration / deceleration rate according to the amount of the main circuit DC voltage, and a second acceleration / deceleration rate creating means also for creating the acceleration / deceleration rate according to the output current and the gradient of the main circuit DC voltage. Acceleration / deceleration rate creating means, a PI controller for performing PI control of the outputs of the first and second acceleration / deceleration rate creating means, and an induction motor based on the determined acceleration / deceleration rate and an externally given speed command. Output speed control means for controlling the drive speed. By performing the control in combination with the first and second acceleration / deceleration rate creation means, it is possible to create a smoother and optimal acceleration / deceleration rate during the actual operation of the induction motor.
【０００６】[0006]
【発明の実施の形態】図１に本発明の誘導電動機の制御
装置の実施例を示す。図１において、１は本発明のイン
バータ装置、２は交流電源、３はコンバータ部、４はイ
ンバータ部、５は誘導電動機、６は負荷、７は出力速度
制御手段、８は主回路電圧検出器、９は出力電流検出
器、１０は運転情報設定手段、１１は運転情報記録手
段、１２は第１の加減速レート作成手段、１３は微分
器、１４は第２の加減速レート作成手段、１５はＰＩ制
御器、１６は加減速レート調整開始レベル、１７は加減
速レート調整ゲイン、１８は加減速時間、１９は速度指
令である。本実施例において、交流電源２から供給され
る交流電力をコンバータ部３で直流に変換し、インバー
タ部４で交流に変換して誘導電動機５を回して負荷６を
駆動する。負荷６を駆動するための出力速度指令は、出
力速度制御手段７からインバータ部４に与えられる。主
回路電圧検出器８で主回路電圧値を測定し、出力電流検
出器９で出力電流を測定する。加減速時間１８及び加減
速レート調整開始レベル１６、加減速レート調整ゲイン
１７等のインバータパラメータ情報が、オペレータ、伝
送等の運転情報設定手段１０で設定され、インバータ装
置１の内部メモリを使用した運転情報記録手段１１に記
録される。FIG. 1 shows an embodiment of a control device for an induction motor according to the present invention. 1, 1 is an inverter device of the present invention, 2 is an AC power supply, 3 is a converter section, 4 is an inverter section, 5 is an induction motor, 6 is a load, 7 is an output speed control means, and 8 is a main circuit voltage detector. , 9 is an output current detector, 10 is operation information setting means, 11 is operation information recording means, 12 is first acceleration / deceleration rate creation means, 13 is a differentiator, 14 is second acceleration / deceleration rate creation means, 15 Is a PI controller, 16 is an acceleration / deceleration rate adjustment start level, 17 is an acceleration / deceleration rate adjustment gain, 18 is an acceleration / deceleration time, and 19 is a speed command. In this embodiment, the AC power supplied from the AC power supply 2 is converted into DC by the converter unit 3, converted into AC by the inverter unit 4, and the induction motor 5 is turned to drive the load 6. An output speed command for driving the load 6 is given from the output speed control means 7 to the inverter unit 4. The main circuit voltage detector 8 measures the main circuit voltage value, and the output current detector 9 measures the output current. Inverter parameter information such as the acceleration / deceleration time 18, the acceleration / deceleration rate adjustment start level 16, and the acceleration / deceleration rate adjustment gain 17 are set by the operation information setting means 10 such as an operator and transmission, and the operation using the internal memory of the inverter device 1 is performed. The information is recorded in the information recording means 11.
【０００７】第１の加減速レート作成手段１２は、主回
路電圧検出器８で測定した主回路電圧、出力電流検出器
９で測定した出力電流から、運転情報記録手段１１から
出力される加減速レート調整開始レベルを減算し、これ
に加減速レート調整ゲイン１７を乗算し、加減速レート
Ａを決定する。第２の加減速レート作成手段１４は、主
回路電圧検出器８で測定した主回路電圧と、出力電流検
出器９でが測定した出力電流をそれぞれ微分器１３によ
って、単位時間当たりの変化量（傾き）としたものに、
運転情報記録手段１１から出力される加減速レート調整
ゲイン１７を乗算し加減速レートＢを決定する。第１の
加減速レート作成手段１２及び第２の加減速レート作成
手段１４の出力を乗算したものを運転情報記録手段１１
から出力される加減速時間１８にさらに乗算し、その結
果をＰＩ制御器１５を介して、出力速度制御手段７に最
終的な加減速レートとして入力する。出力速度制御手段
７は外部から与えられる速度指令１９と、前記の最終的
な加減速時間を基にして、出力速度指令をインバータ部
４およびＰＩ制御器１５に送る。インバータ部４は前記
出力速度指令に従って誘導電動機５を回して負荷６を駆
動する。The first acceleration / deceleration rate creating means 12 calculates the acceleration / deceleration output from the operation information recording means 11 based on the main circuit voltage measured by the main circuit voltage detector 8 and the output current measured by the output current detector 9. The rate adjustment start level is subtracted, and this is multiplied by the acceleration / deceleration rate adjustment gain 17 to determine the acceleration / deceleration rate A. The second acceleration / deceleration rate creation means 14 uses the differentiator 13 to calculate the change amount per unit time of the main circuit voltage measured by the main circuit voltage detector 8 and the output current measured by the output current detector 9. Slope),
The acceleration / deceleration rate B is determined by multiplying the acceleration / deceleration rate adjustment gain 17 output from the driving information recording means 11. The product obtained by multiplying the output of the first acceleration / deceleration rate creation means 12 and the output of the second acceleration / deceleration rate creation means 14 is used as the driving information recording means 11
Is further multiplied by the acceleration / deceleration time 18 output from the controller, and the result is input to the output speed controller 7 via the PI controller 15 as the final acceleration / deceleration rate. The output speed control means 7 sends the output speed command to the inverter unit 4 and the PI controller 15 based on the speed command 19 given from the outside and the final acceleration / deceleration time. The inverter unit 4 drives the load 6 by rotating the induction motor 5 according to the output speed command.
【０００８】図２に本発明による加減速動作の例を示
す。図２において、（ａ）はインバータ出力電流、
（ｂ）は主回路直流電圧、（ｃ）はインバータの出力周
波数，Ｔaは加速時間、Ｔdは減速時間を示している。本
発明の装置では、インバータ出力電流、主回路直流電圧
ともに、加減速レート作成手段１２の電流、電圧の量に
よる調整だけでなく、加減速レート作成手段１４の電
流、電圧の単位時間当たりの変化量（傾き）による調整
もあわせて行っているため、インバータ出力電流、主回
路直流電圧ともに、従来の加減速動作の図３に比べて増
減が滑らかになり、インバータの出力周波数もそれぞれ
Ｔa，Ｔdにわたって滑らかに変化している。FIG. 2 shows an example of the acceleration / deceleration operation according to the present invention. In FIG. 2, (a) is an inverter output current,
(B) is the main circuit DC voltage, (c) is the output frequency of the inverter, Ta is the acceleration time, and Td is the deceleration time. In the device of the present invention, not only the inverter output current and the main circuit DC voltage are adjusted by the current and voltage amounts of the acceleration / deceleration rate creation means 12 but also the changes of the current and voltage of the acceleration / deceleration rate creation means 14 per unit time Since the adjustment based on the amount (slope) is also performed, the inverter output current and the main circuit DC voltage both increase and decrease smoothly compared to the conventional acceleration / deceleration operation of FIG. 3 and the output frequency of the inverter also becomes T a , It changes smoothly over Td .
【０００９】[0009]
【発明の効果】上述したように、本発明の装置を用いれ
ば、第１および第２の加減速レート作成手段を組み合わ
せた制御を行うことにより、滑らかかつ最適な加減速が
可能となり、生産性が向上する。As described above, when the apparatus of the present invention is used, smooth and optimal acceleration / deceleration can be performed by performing control in combination with the first and second acceleration / deceleration rate creation means, and the productivity can be improved. Is improved.
【図１】 本発明の一実施例を示すブロック図である。FIG. 1 is a block diagram showing one embodiment of the present invention.
【図２】 本発明の加減速動作例を示す波形図である。FIG. 2 is a waveform diagram showing an example of an acceleration / deceleration operation of the present invention.
【図３】 従来の加減速動作例を示す波形図である。FIG. 3 is a waveform diagram showing an example of a conventional acceleration / deceleration operation.
１ インバータ装置、２ 交流電源、３ コンバータ
部、４ インバータ部、５誘導電動機、６ 負荷、７
出力速度制御手段、８ 主回路電圧検出器、９出力電流
検出器、１０ 運転情報設定手段、１１ 運転情報記録
手段、１２ 加減速レート作成手段Ａ、１３ 微分器、
１４ 加減速レート作成手段Ｂ、１５ＰＩ制御器、１６
加減速レート調整開始レベル、１７ 加減速レート調
整ゲイン、１８ 加減速時間、１９ 速度指令DESCRIPTION OF SYMBOLS 1 Inverter apparatus, 2 AC power supply, 3 converter part, 4 inverter part, 5 induction motor, 6 load, 7
Output speed control means, 8 main circuit voltage detector, 9 output current detector, 10 operation information setting means, 11 operation information recording means, 12 acceleration / deceleration rate creation means A, 13 differentiator,
14 Acceleration / deceleration rate creation means B, 15 PI controller, 16
Acceleration / deceleration rate adjustment start level, 17 acceleration / deceleration rate adjustment gain, 18 acceleration / deceleration time, 19 speed command
Claims (2)
ンバータ装置を有する誘導電動機の制御装置において、 加減速時間、加減速レート調整開始レベル、加減速レー
ト調整ゲイン等のインバータパラメータを設定する運転
情報設定手段と、この運転情報設定手段で設定される情
報を記録する運転情報記録手段と、出力電流及び主回路
直流電圧の量に応じて加減速のレートを作成する第１の
加減速レート作成手段と、同じく出力電流及び主回路直
流電圧の傾きに応じて加減速のレートを作成する第２の
加減速レート作成手段と、これらの第１および第２の加
減速レート作成手段の出力を制御する制御器と、決定さ
れた加減速レートと外部より与えられる速度指令に基づ
いて、誘導電動機駆動速度を制御する出力速度制御手段
とを備えたことを特徴とする誘導電動機の制御装置。A control device for an induction motor having an inverter device for rotating the induction motor at an arbitrary speed, wherein operation information for setting inverter parameters such as an acceleration / deceleration time, an acceleration / deceleration rate adjustment start level, and an acceleration / deceleration rate adjustment gain. Setting means, operation information recording means for recording information set by the operation information setting means, and first acceleration / deceleration rate creation means for creating an acceleration / deceleration rate according to the amount of output current and main circuit DC voltage Similarly, a second acceleration / deceleration rate creating means for creating an acceleration / deceleration rate according to the output current and the gradient of the main circuit DC voltage, and controlling the outputs of the first and second acceleration / deceleration rate creating means. A controller, and output speed control means for controlling the induction motor drive speed based on the determined acceleration / deceleration rate and a speed command given from the outside. Control for an induction motor according to symptoms.
徴とする請求項１記載の誘導電動機の制御装置。2. The control device for an induction motor according to claim 1, wherein said controller is a PI controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9245726A JPH1189284A (en) | 1997-09-10 | 1997-09-10 | Controller of induction motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9245726A JPH1189284A (en) | 1997-09-10 | 1997-09-10 | Controller of induction motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1189284A true JPH1189284A (en) | 1999-03-30 |
Family
ID=17137899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9245726A Pending JPH1189284A (en) | 1997-09-10 | 1997-09-10 | Controller of induction motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1189284A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003056694A1 (en) * | 2001-12-26 | 2003-07-10 | Toyota Jidosha Kabushiki Kaisha | Electrical load apparatus, electrical load control method, and computer-readable record medium with recorded program for enabling computer to control electrical load |
| KR100675650B1 (en) * | 2004-12-08 | 2007-02-02 | 엘에스산전 주식회사 | Apparatus for controlling velocity of inverter |
-
1997
- 1997-09-10 JP JP9245726A patent/JPH1189284A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003056694A1 (en) * | 2001-12-26 | 2003-07-10 | Toyota Jidosha Kabushiki Kaisha | Electrical load apparatus, electrical load control method, and computer-readable record medium with recorded program for enabling computer to control electrical load |
| US7847499B2 (en) | 2001-12-26 | 2010-12-07 | Toyota Jidosha Kabushiki Kaisha | Electric load apparatus, electric load controlling method and computer readable recording medium recording program for causing computer to execute control of electric load |
| KR100675650B1 (en) * | 2004-12-08 | 2007-02-02 | 엘에스산전 주식회사 | Apparatus for controlling velocity of inverter |
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