JPH06165547A - Braking method for induction motor - Google Patents
Braking method for induction motorInfo
- Publication number
- JPH06165547A JPH06165547A JP4315465A JP31546592A JPH06165547A JP H06165547 A JPH06165547 A JP H06165547A JP 4315465 A JP4315465 A JP 4315465A JP 31546592 A JP31546592 A JP 31546592A JP H06165547 A JPH06165547 A JP H06165547A
- Authority
- JP
- Japan
- Prior art keywords
- inverter
- voltage
- braking
- frequency
- induction 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.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、インバータ駆動による
誘導電動機の制動方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for braking an induction motor driven by an inverter.
【０００２】[0002]
【従来の技術】制動装置を持つ従来のインバータ主回路
を図３に示す。交流電源１から交流電力を整流器２によ
って直流に変換し、この直流電力をインバータ３によっ
て制御された電圧・周波数の交流電力に逆変換し、複数
の誘導電動機４1〜４nに供給してその定速駆動や可変速
駆動を行う。2. Description of the Related Art A conventional inverter main circuit having a braking device is shown in FIG. Converted from the AC power supply 1 to AC power into DC by the rectifier 2, inversely converts the DC power into AC power of voltage and frequency controlled by the inverter 3, the supplies to the plurality of induction motors 4 1 to 4 n Performs constant speed drive or variable speed drive.
【０００３】誘導電動機４1〜４nを精紡機等の駆動源と
する場合、その停止時に逆回転すると糸のたるみ等が次
回の起動時に糸切れの原因になるため、逆回転を無くし
た制動回路５が設けられる。[0003] inducing If the motor 4 1 to 4 n is a driving source of the spinning machine or the like, for the reverse rotation at the time of stopping the yarn slack or the like may cause a yarn breakage the next startup, braking which eliminates reverse rotation A circuit 5 is provided.
【０００４】制動装置５はタップ付きトランス５1によ
って調整した電圧を得、整流器５2によって整流した直
流電力を得ておき、インバータ３の停止後に電磁接触器
５3を介して誘導電動機４1〜４nに直流電圧を印加する
ことで直流制動を得る。このブレーキトルクはトランス
５1のタップ切換えでなされ、一定電圧による一定の制
動力を発生させて停止を得る。The braking device 5 obtains the voltage adjusted by the tapped transformer 5 1 , obtains the DC power rectified by the rectifier 5 2 , and after the inverter 3 is stopped, the induction motors 4 1 to 4 1 through the electromagnetic contactor 5 3. DC braking is obtained by applying a DC voltage to 4 n . This braking torque is made by tap switching of the transformer 5 1 , and a constant braking force is generated by a constant voltage to obtain a stop.
【０００５】他の制動方法として、特開平３−２５３２
８２号公報にはインバータ３から直流電圧を印加するも
のが開示され、また特開平３−２８９３８４号公報には
停止時にインバータの出力周波数を低下させ、この周波
数が直流制動周波数よりも低くなったときに直流制動に
切換えるものが開示されている。As another braking method, Japanese Patent Laid-Open No. 3-2532
No. 82 discloses a device for applying a DC voltage from the inverter 3, and JP-A-3-289384 discloses that when the frequency of the output of the inverter is lowered at the time of stoppage and this frequency becomes lower than the DC braking frequency. There is disclosed a method of switching to DC braking.
【０００６】[0006]
【発明が解決しようとする課題】従来の制動回路５によ
る制動は専用の制動装置を必要として高価なものになる
し、制動トルクを小さくするため停止に時間がかかる。The conventional braking by the braking circuit 5 requires an exclusive braking device and becomes expensive, and it takes a long time to stop because the braking torque is reduced.
【０００７】この点、インバータが直流電圧を発生する
方法では専用の制動装置を不要にする。In this respect, the method of generating DC voltage by the inverter does not require a dedicated braking device.
【０００８】しかしながら、インバータは一定の直流電
圧を発生すること、及びこの直流電圧印加が図４に時刻
ｔ1，ｔ2等で示すように誘導電動機の各相に対して均等
に印加できないため、誘導電動機にはスロット数に限り
があって磁気的に各相の強弱（トルクアンバランス）が
発生し、磁気的に均り合った回転位置で止るために停止
時に少し逆回転することがある。However, since the inverter generates a constant DC voltage and this DC voltage application cannot be applied uniformly to each phase of the induction motor as shown at times t 1 , t 2 etc. in FIG. Since the induction motor has a limited number of slots, magnetically strong and weak phases of each phase (torque imbalance) may occur, and the motor may stop at a rotational position where it is magnetically balanced so that it may slightly rotate in reverse.
【０００９】本発明の目的は、インバータによる制動に
しながら停止時の逆転を無くす制動方法を提供すること
にある。An object of the present invention is to provide a braking method that eliminates reverse rotation at the time of stopping while braking by an inverter.
【００１０】[0010]
【課題を解決するための手段】本発明は、前記課題の解
決を図るため、インバータで駆動される誘導電動機にお
いて、前記インバータの運転シーケンスの終了時に前記
インバータの運転を停止させて誘導電動機をフリーラン
状態にし、一定時間Ｔ1後に前記インバータを低い一定
周波数ｆ1，電圧Ｖ1で一定時間又は誘導電動機の回転数
が該周波数ｆ1に一致するまでの時間Ｔ2だけ運転し、こ
の後に前記インバータを運転周波数零，電圧Ｖ2までク
ッション特性で低下させ、最後に前記インバータを電圧
Ｖ2の直流制動で一定時間Ｔ3だけ運転することを特徴と
する。SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides an induction motor driven by an inverter, in which the operation of the inverter is stopped at the end of the operation sequence of the inverter to free the induction motor. In a run state, the inverter is operated at a low constant frequency f 1 and a voltage V 1 for a certain time after a certain time T 1 or for a time T 2 until the rotational speed of the induction motor matches the frequency f 1 , and then the above It is characterized in that the inverter is lowered to the operating frequency of zero and the voltage V 2 by the cushion characteristic, and finally the inverter is operated by the DC braking of the voltage V 2 for a predetermined time T 3 .
【００１１】また、本発明は、インバータで駆動される
誘導電動機において、前記インバータの運転シーケンス
の終了時に該インバータの運転周波数ｆ，電圧Ｖを回生
制動で低下させ、前記インバータの周波数が一定値ｆ2
まで低下したときに該インバータを低い一定周波数
ｆ1，電圧Ｖ1で一定時間Ｔ2だけ運転し、この後に前記
インバータを運転周波数零，電圧Ｖ2までクッション特
性で低下させ、最後に前記インバータを電圧Ｖ2の直流
制動で一定時間Ｔ3だけ運転することを特徴とする。Further, according to the present invention, in an induction motor driven by an inverter, the operating frequency f and voltage V of the inverter are reduced by regenerative braking at the end of the operating sequence of the inverter, and the frequency of the inverter is kept at a constant value f. 2
When the voltage drops to 0, the inverter is operated at a low constant frequency f 1 and voltage V 1 for a fixed time T 2 , after which the inverter is lowered to an operating frequency of 0 and voltage V 2 with a cushion characteristic, and finally the inverter is turned on. It is characterized in that it is operated for a fixed time T 3 by DC braking of the voltage V 2 .
【００１２】[0012]
【作用】請求項１の方法は、誘導電動機をフリーラン状
態にして低い一定周波数ｆ1まで減速させ、この周波数
からクッション特性で零速度まで減速した後に直流制動
によって停止させ、直流制動時の電圧Ｖ2を極めて低く
して停止時の逆回転を無くす。According to the method of claim 1, the induction motor is decelerated to a low constant frequency f 1 in a free-run state, decelerated from this frequency to zero speed by the cushion characteristic, and then stopped by DC braking, and the voltage during DC braking is reduced. V 2 is made extremely low to eliminate reverse rotation when stopped.
【００１３】請求項２の方法は回生制動によって誘導電
動機を低い一定周波数ｆ2まで減速させ、この後周波数
ｆ1からのクッション特性による減速を行い、直流制動
による停止を得る。According to the method of claim 2, the induction motor is decelerated to a low constant frequency f 2 by regenerative braking, and then decelerated by the cushion characteristic from the frequency f 1 to obtain a stop by DC braking.
【００１４】[0014]
【実施例】図１は本発明の一実施例を示すフリーラン停
止タイムチャートを示す。本実施例は図３における制動
回路５を省略した構成において、インバータ３の運転周
波数ｆと運転電圧Ｖと運転シーケンス信号Ｆ−ＲＵＮ及
びブレーキシーケンス信号ＢＲＡＫＥを示す。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT FIG. 1 is a free-run stop time chart showing an embodiment of the present invention. The present embodiment shows the operating frequency f of the inverter 3, the operating voltage V, the operating sequence signal F-RUN, and the brake sequence signal BRAKE in the configuration in which the braking circuit 5 in FIG. 3 is omitted.
【００１５】停止制御開始時刻ｔ1にはインバータの周
波数ｆ及び電圧Ｖを一旦零にし、誘導電動機４1〜４nを
慣性によって減速開始させる。この後、時刻ｔ2のブレ
ーキシーケンス信号が与えられたときから誘導電動機４
1〜４nの誘起電圧が消減するに必要な時間Ｔ1を待って
インバータ３を低い一定の周波数ｆ1，電圧Ｖ1で制動運
転する。At the stop control start time t 1 , the frequency f and voltage V of the inverter are once set to zero, and the induction motors 4 1 to 4 n are decelerated by inertia. After this, the induction motor 4 starts operating when the brake sequence signal at time t 2 is applied.
The inverter 3 is braked at the low constant frequency f 1 and the voltage V 1 after waiting the time T 1 required for the induced voltages of 1 to 4 n to disappear.
【００１６】この制動運転は誘導電動機４1〜４nとその
負荷の慣性の大きさ等から求めた一定期間Ｔ2だけ行
い、この期間Ｔ2によって誘導電動機４1〜４nが減速
し、その回転数がｆ1に一致するとき、又は一致するの
に十分な期間Ｔ2を設定し、インバータの周波数と誘導
電動機の回転数を一致させる。This braking operation is performed only for a certain period T 2 obtained from the induction motors 4 1 to 4 n and the magnitude of the inertia of the load, and the induction motors 4 1 to 4 n decelerate during this period T 2 . when the rotational speed is equal to f 1, or to set a sufficient period T 2 to match to, match the rotational speed of the induction motor with the frequency of the inverter.
【００１７】この後、インバータ３の周波数ｆ1を零に
向けて低下させ、電圧Ｖ1を一定値Ｖ2に向けて低下させ
るクッション特性による減速を（制動）を期間Ｔ3だけ
行う。After that, deceleration (braking) is performed for the period T 3 by the cushion characteristic of decreasing the frequency f 1 of the inverter 3 toward zero and decreasing the voltage V 1 toward the constant value V 2 .
【００１８】最後に、時刻ｔ5ではインバータ３の周波
数を零，電圧Ｖ2を一定とする直流制動を時刻ｔ6まで行
い、誘導電動機を停止させる。Finally, at time t 5 , DC braking is performed until the frequency of the inverter 3 is zero and the voltage V 2 is constant until time t 6 , and the induction motor is stopped.
【００１９】従って、本実施例によれば、誘導電動機を
一定期間Ｔ1だけフリーランさせて誘起電圧の消減を図
り、この後一定期間または周波数一致までの期間Ｔ2だ
け低い一定周波数ｆ1，電圧Ｖ1で制動することで誘導電
動機を低回転状態とし、次いで、周波数ｆ1を零にする
クッション特性で減速し、最後に直流制動で完全に停止
させる。Therefore, according to the present embodiment, the induction motor is free-run for a fixed period T 1 to reduce the induced voltage, and thereafter, a fixed frequency f 1 , which is lower by a fixed period or a period T 2 until the frequency coincides, The induction motor is brought into a low rotation state by braking with the voltage V 1 , and then the induction motor is decelerated by the cushion characteristic that makes the frequency f 1 zero, and finally stopped completely by DC braking.
【００２０】この直流制動では電圧Ｖ2を極めて低くし
て比較的短時間で停止させることができ、しかも誘導電
動機の各相の電圧にアンバランスがあるも逆転を起さな
い低い電圧Ｖ2とすることができる。In this DC braking, the voltage V 2 can be made extremely low and can be stopped in a relatively short time. Moreover, even if there is an imbalance in the voltage of each phase of the induction motor, a low voltage V 2 that does not cause reverse rotation is obtained. can do.
【００２１】図２は本発明の他の実施例を示す回生停止
タイムチャートである。本実施例では運転シーケンス信
号Ｆ−ＲＵＮでインバータ３を回生制動運転し、この周
波数ｆが制動開始周波数ｆ2まで低下したとき（時刻
ｔ3）に一定周波数ｆ1，電圧Ｖ1による制動運転を期間
Ｔ2だけ行い、この後クッション特性で周波数ｆ1を零に
向けて下げると共に電圧Ｖ1をＶ2に向けて下げる減速期
間Ｔ3を設け、最後に電圧Ｖ2による直流制動をかけて停
止させる。FIG. 2 is a regeneration stop time chart showing another embodiment of the present invention. The inverter 3 is a regenerative braking operation in the operation sequence signal F-RUN in the present embodiment, a constant frequency f 1 (time t 3) When the frequency f is lowered to brake start frequency f 2, the brake operation by voltages V 1 Only during the period T 2 , after that, a deceleration period T 3 is provided in which the frequency f 1 is reduced to zero and the voltage V 1 is reduced to V 2 by the cushion characteristic, and finally DC braking is performed by the voltage V 2 to stop. Let
【００２２】本実施例においても、電圧Ｖ2を極めて低
くすることで誘導電動機に逆転を起すことなく停止させ
ることができる。Also in this embodiment, the voltage V 2 can be made extremely low so that the induction motor can be stopped without causing reverse rotation.
【００２３】[0023]
【発明の効果】以上のとおり、本発明によれば、停止制
御には誘導電動機をフリーラン又は回生制動によって減
速し、低い一定周波数ｆ1，電圧Ｖ1の運転状態を経てク
ッション特性で減速し、極めて低い電圧Ｖ2で直流制動
をかけて停止させるようにしたため、以下の効果があ
る。As described above, according to the present invention, for stop control, the induction motor is decelerated by free run or regenerative braking, and is decelerated by the cushion characteristic after operating at a low constant frequency f 1 and voltage V 1. Since the DC braking is applied at an extremely low voltage V 2 to stop the operation, the following effects are obtained.
【００２４】（１）誘導電動機の逆転を無くした停止に
専用の制動回路を不要にすると共に制動時間を短縮でき
る。(1) A braking circuit dedicated to the stop without reverse rotation of the induction motor is unnecessary and the braking time can be shortened.
【００２５】（２）直流制動に直接に入ることなく減速
した後に行うため電動機の逆転を無くすと共に制動のた
めのエネルギーロスを少なくする。(2) Since it is performed after deceleration without directly entering the DC braking, the reverse rotation of the electric motor is eliminated and the energy loss for braking is reduced.
【００２６】（３）運転状態からの減速を滑らかにして
トルクショックを小さくする。(3) The torque shock is reduced by smoothing the deceleration from the operating state.
【図１】本発明の一実施例を示すフリーラン停止タイム
チャート。FIG. 1 is a free-run stop time chart showing an embodiment of the present invention.
【図２】他の実施例を示す回生停止タイムチャート。FIG. 2 is a regeneration stop time chart showing another embodiment.
【図３】従来の主回路図。FIG. 3 is a conventional main circuit diagram.
【図４】制動開始時の位相。FIG. 4 is a phase at the start of braking.
２…整流器 ２…インバータ ４1，４n…誘導電動機2 ... rectifier 2 ... inverter 4 1, 4 n ... induction motor
Claims (2)
いて、前記インバータの運転シーケンスの終了時に前記
インバータの運転を停止させて誘導電動機をフリーラン
状態にし、一定時間Ｔ1後に前記インバータを低い一定
周波数ｆ1，電圧Ｖ1で一定時間又は誘導電動機の回転数
が該周波数ｆ1に一致するまでの時間Ｔ2だけ運転し、こ
の後に前記インバータを運転周波数零，電圧Ｖ2までク
ッション特性で低下させ、最後に前記インバータを電圧
Ｖ2の直流制動で一定時間Ｔ3だけ運転することを特徴と
する誘導電動機の制動方法。1. In an induction motor driven by an inverter, the operation of the inverter is stopped at the end of the operation sequence of the inverter to bring the induction motor into a free-run state, and after a predetermined time T 1 , the inverter is driven to a low constant frequency f. 1. Operate at a voltage V 1 for a certain period of time or for a time T 2 until the rotation speed of the induction motor matches the frequency f 1 , and thereafter, reduce the inverter to an operating frequency of 0 and a voltage V 2 with a cushion characteristic. Finally, a method of braking an induction motor, characterized in that the inverter is operated by DC braking with a voltage V 2 for a predetermined time T 3 .
いて、前記インバータの運転シーケンスの終了時に該イ
ンバータの運転周波数ｆ，電圧Ｖを回生制動で低下さ
せ、前記インバータの周波数が一定値ｆ2まで低下した
ときに該インバータを低い一定周波数ｆ1，電圧Ｖ1で一
定時間Ｔ2だけ運転し、この後に前記インバータを運転
周波数零，電圧Ｖ2までクッション特性で低下させ、最
後に前記インバータを電圧Ｖ2の直流制動で一定時間Ｔ3
だけ運転することを特徴とする誘導電動機の制動方法。2. In an induction motor driven by an inverter, the operating frequency f and voltage V of the inverter are reduced by regenerative braking at the end of the operating sequence of the inverter, and the frequency of the inverter is reduced to a constant value f 2 . At some times, the inverter is operated at a low constant frequency f 1 and voltage V 1 for a certain time T 2 , after which the inverter is lowered to an operating frequency of 0 and voltage V 2 with a cushion characteristic, and finally the inverter is operated to voltage V 2 DC braking for a certain time T 3
A method for braking an induction motor, which is characterized in that the induction motor is driven only.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31546592A JP3248270B2 (en) | 1992-11-26 | 1992-11-26 | Induction motor braking method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31546592A JP3248270B2 (en) | 1992-11-26 | 1992-11-26 | Induction motor braking method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06165547A true JPH06165547A (en) | 1994-06-10 |
| JP3248270B2 JP3248270B2 (en) | 2002-01-21 |
Family
ID=18065690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31546592A Expired - Fee Related JP3248270B2 (en) | 1992-11-26 | 1992-11-26 | Induction motor braking method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3248270B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005081396A1 (en) * | 2004-02-19 | 2005-09-01 | Kabushiki Kaisha Yaskawa Denki | Induction motor stopping method and control apparatus |
| JP2013190111A (en) * | 2012-03-12 | 2013-09-26 | Hitachi Ltd | Ventilation system, ventilation method and control device |
| CN106655921A (en) * | 2016-11-18 | 2017-05-10 | 深圳市道通智能航空技术有限公司 | Braking method of permanent-magnet synchronous motor and related equipment |
-
1992
- 1992-11-26 JP JP31546592A patent/JP3248270B2/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005081396A1 (en) * | 2004-02-19 | 2005-09-01 | Kabushiki Kaisha Yaskawa Denki | Induction motor stopping method and control apparatus |
| GB2428145A (en) * | 2004-02-19 | 2007-01-17 | Yaskawa Denki Seisakusho Kk | Induction motor stopping method and control apparatus |
| GB2428145B (en) * | 2004-02-19 | 2007-07-04 | Yaskawa Denki Seisakusho Kk | Induction motor stopping method and control apparatus |
| US7521889B2 (en) | 2004-02-19 | 2009-04-21 | Kabushiki Kaisha Yaskawa Denki | Method of braking induction motor and control apparatus |
| JP2013190111A (en) * | 2012-03-12 | 2013-09-26 | Hitachi Ltd | Ventilation system, ventilation method and control device |
| CN106655921A (en) * | 2016-11-18 | 2017-05-10 | 深圳市道通智能航空技术有限公司 | Braking method of permanent-magnet synchronous motor and related equipment |
| US11581831B2 (en) | 2016-11-18 | 2023-02-14 | Autel Robotics Co., Ltd. | Method for braking permanent magnet synchronous motor and related device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3248270B2 (en) | 2002-01-21 |
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