JPH0728543B2 - AC motor controller - Google Patents
AC motor controllerInfo
- Publication number
- JPH0728543B2 JPH0728543B2 JP58206878A JP20687883A JPH0728543B2 JP H0728543 B2 JPH0728543 B2 JP H0728543B2 JP 58206878 A JP58206878 A JP 58206878A JP 20687883 A JP20687883 A JP 20687883A JP H0728543 B2 JPH0728543 B2 JP H0728543B2
- Authority
- JP
- Japan
- Prior art keywords
- angle
- current
- speed
- overlapping
- inverter
- 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
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/045—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value
-
- 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
- H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
- H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
- H02P25/022—Synchronous motors
- H02P25/024—Synchronous motors controlled by supply frequency
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Ac Motors In General (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Description
【発明の詳細な説明】 〔発明の技術分野〕 本発明は交流電源に接続されたコンバータと直流を交流
に逆変換して負荷である交流電動機に交流電力を供給す
るインバータと、コンバータとインバータ間の直流リン
ク回路に接続された直流リアクトルからなる交流電動機
の制御装置に関するものである。Description: TECHNICAL FIELD The present invention relates to a converter connected to an AC power source, an inverter for converting DC into AC and supplying AC power to an AC motor as a load, and between the converter and the inverter. The present invention relates to a control device for an AC electric motor, which is composed of a DC reactor connected to the DC link circuit.
第１図は従来の交流電動機の制御装置の一例を示し、10
は三相交流電源、11はしや断器、12はサイリスタにより
構成されたコンバータ、13は平滑用直流リアクトル、14
はサイリスタにより構成され120°通電のインバータ、1
5はインバータ14の負荷である交流電動機、151は交流電
動機15の界磁巻線、152は界磁巻線151に電力を供給する
界磁コンバータ、16は速度設定器、24は前記交流電動機
15の速度を検出する速度検出器、17は速度制御器、18は
電流制御器、19は前記コンバータ12の出力電圧を制御す
る位相制御器、20は電流検出器、23は前記インバータの
重なり角を検出する重なり角検出器、22は電圧検出器、
21は制御進み角β制御器である。FIG. 1 shows an example of a conventional AC motor control device.
Is a three-phase AC power supply, 11 is a breaker, 12 is a converter composed of a thyristor, 13 is a smoothing DC reactor, and 14 is a smoothing DC reactor.
Is a 120 ° energizing inverter composed of a thyristor, 1
5 is an AC electric motor that is a load of the inverter 14, 151 is a field winding of the AC electric motor 15, 152 is a field converter that supplies electric power to the field winding 151, 16 is a speed setter, and 24 is the AC motor.
15 speed detector for detecting speed, 17 speed controller, 18 current controller, 19 phase controller for controlling output voltage of the converter 12, 20 current detector, 23 overlapping angle of the inverter Overlap angle detector, 22 is a voltage detector,
Reference numeral 21 is a control lead angle β controller.
第１図より明らかなように、三相交流電源10からの交流
電力はコンバータ12により直流可変電圧に変換され、直
流リアクトル13で平滑された上で、これをインバータ14
により交流電力に逆変換して負荷の交流電動機15に供給
するものである。As is clear from FIG. 1, the AC power from the three-phase AC power source 10 is converted into a DC variable voltage by the converter 12, smoothed by the DC reactor 13, and then converted into an inverter 14
Is converted back to AC power and supplied to the AC motor 15 of the load.
コンバータ12およびインバータ14を制御する制御回路
は、速度設定器16により設定された速度基準信号と速度
検出器24により検出された交流電動機15の速度が速度制
御器17により比較増幅され電流基準信号となる。この電
流基準信号は電流検出器20により検出された電流と電流
制御器18で比較増幅されて位相制御器19に与えられ、位
相制御器19は前記コンバータ12の出力電圧を制御する。
一方、重なり角検出器23は電流検出器20により検出した
電流や電圧，周波数をもとにインバータ14の重なり角ｕ
を検出し、この重なり角ｕと電圧検出器22で検出したイ
ンバータ14の出力電圧より制御進み角β制御器において
インバータ14の各サイリスタの点弧タイミングを決め出
力周波数を制御する。ここで、制御進み角βはインバー
タ14のサイリスタにより決まる一定値の転流余裕角γお
よび重なり角ｕの和で与えられるγ一定制御であり、重
なり角ｕは交流電動機15の電流が大きくなるとともにふ
え第２図に示す如くなる。The control circuit for controlling the converter 12 and the inverter 14 has a speed reference signal set by the speed setter 16 and the speed of the AC motor 15 detected by the speed detector 24, which is comparatively amplified by the speed controller 17 to obtain a current reference signal. Become. This current reference signal is compared and amplified by the current detected by the current detector 20 and the current controller 18 and given to the phase controller 19. The phase controller 19 controls the output voltage of the converter 12.
On the other hand, the overlap angle detector 23 determines the overlap angle u of the inverter 14 based on the current, voltage and frequency detected by the current detector 20.
The control lead angle β controller determines the ignition timing of each thyristor of the inverter 14 from the overlapping angle u and the output voltage of the inverter 14 detected by the voltage detector 22 to control the output frequency. Here, the control advance angle β is a constant γ control given by the sum of the commutation allowance angle γ and the overlapping angle u of a constant value determined by the thyristor of the inverter 14, and the overlapping angle u increases as the current of the AC motor 15 increases. Fut It becomes as shown in FIG.
このような交流電動機の制御装置において、前記制御回
路をマイクロプロセツサ等を使用してデイジタル化した
場合、所定の間隔で重なり角ｕを演算するが急加減速を
行つたり又電流の変化の割合が大きいと、演算で求めた
値以上に実際の重なり角ｕが変化し、転流余裕角が不足
してインバータが転流失敗をおこし安定な運転が行なえ
ないという欠点があった。これに対し重なり角ｕの演算
時間を短かくして演算間隔をつめればよいがマイクロプ
ロセツサ等の処理速度に限界がある。In such a control device for an AC motor, when the control circuit is digitalized by using a microprocessor or the like, the overlapping angle u is calculated at a predetermined interval, but sudden acceleration / deceleration or a change in current is performed. If the ratio is large, the actual overlapping angle u changes more than the calculated value, the commutation margin angle is insufficient, the inverter fails commutation, and stable operation cannot be performed. On the other hand, the calculation time of the overlap angle u may be shortened and the calculation interval may be shortened, but the processing speed of the microprocessor or the like is limited.
そこで、本発明は以上の点に鑑みてなされたもので、電
動機を急加減速しても転流失敗することなく安定に運転
できる制御進み角βの制御を行なう交流電動機の制御装
置を提供することを目的とする。Therefore, the present invention has been made in view of the above points, and provides a control device for an AC electric motor that controls a control advance angle β that allows stable operation without commutation failure even when the electric motor is rapidly accelerated or decelerated. The purpose is to
〔発明の概要〕 本発明はこの目的を達成するために、速度あるいは速度
基準の加減速率の大きさ、電流の大きさあるいは電流の
変化率の大きさに応じて重なり角を決め制御進み角βを
制御するようにしたものである。SUMMARY OF THE INVENTION In order to achieve this object, the present invention determines an overlapping angle according to the magnitude of a speed or a speed-based acceleration / deceleration rate, the magnitude of a current, or the magnitude of a change rate of a current. Is controlled.
以下、図面により本発明の実施例を説明する。 Embodiments of the present invention will be described below with reference to the drawings.
第３図は本発明による一実施例を示す回路構成図であ
る。ここで、第１図と同一符号は同一物もしくは相当物
を示し、動作も全く同様であるので説明を省略し、この
発明に新しく加わつた部分の動作について述べる。FIG. 3 is a circuit configuration diagram showing an embodiment according to the present invention. Here, the same reference numerals as those in FIG. 1 indicate the same or equivalent parts, and the operation is completely the same, so the description thereof will be omitted, and the operation of the part newly added to the present invention will be described.
25は加減速率検出器、26は重なり角設定器、27はスイツ
チである。加減速率検出器25は速度検出器24で検出され
た速度より加減速率が所定値以上となつた場合、スイツ
チ27を切りかえて、重なり角設定器26で設定された所定
の重なり角ｕをβ制御器21入力し制御進み角βを制御す
る。加減速率が減少して電流が減少すると、前記加減速
率検出器25のもう一方の入力である電流検出器で検出し
た電流によりスイツチ27はリセツトされ、重なり角ｕは
重なり角検出器23で求めた値を用いて制御進み角βが制
御される。第４図は速度、電流および制御進み角βの関
係を示したもので０からt2までは重なり角設定器26で設
定された所定の重なり角ｕが与えられており、急加減速
を行なつても必要な転流余裕角γを得ることができ転流
失敗することなく安定に運転することができる。25 is an acceleration / deceleration rate detector, 26 is an overlap angle setting device, and 27 is a switch. The acceleration / deceleration rate detector 25 switches the switch 27 when the acceleration / deceleration rate exceeds a predetermined value from the speed detected by the speed detector 24, and β-controls the predetermined overlapping angle u set by the overlapping angle setting device 26. The control lead angle β is controlled. When the acceleration / deceleration rate decreases and the current decreases, the switch 27 is reset by the current detected by the current detector which is the other input of the acceleration / deceleration rate detector 25, and the overlapping angle u is obtained by the overlapping angle detector 23. The value is used to control the control advance angle β. FIG. 4 shows the relationship among the speed, the current and the control advance angle β. From 0 to t 2, the predetermined overlap angle u set by the overlap angle setting unit 26 is given, and rapid acceleration / deceleration is performed. In particular, the required commutation allowance γ can be obtained, and stable operation can be achieved without commutation failure.
第5,7,8図は本発明による他の実施例を示す回路構成図
であり、第１図あるいは第３図と同一符号は同一物又は
相当物を示すので説明は省略する。FIGS. 5, 7, and 8 are circuit configuration diagrams showing another embodiment according to the present invention, and the same reference numerals as those in FIG. 1 or FIG.
第５図において28は転流余裕時間γ制御器であり、速度
を入力して角度に変換し重なり角検出器23で検出した重
なり角ｕと加算して制御進み角β制御器23に与えられ
る。急加減速を行なつた場合、加減速率検出器25で速度
の加減速率が所定値以上になつたことを検出するとスイ
ツチ27により重なり角設定器26で設定される所定の重な
り角ｕが制御進み角β制御器21に与えられ制御進み角が
制御される。In FIG. 5, reference numeral 28 is a commutation allowance time γ controller, which inputs the velocity, converts it into an angle, adds it to the overlapping angle u detected by the overlapping angle detector 23, and gives it to the control advance angle β controller 23. . When rapid acceleration / deceleration is performed, when the acceleration / deceleration rate detector 25 detects that the acceleration / deceleration rate of the speed exceeds a predetermined value, the switch 27 advances the predetermined overlap angle u set by the overlap angle setter 26. The angle β is given to the controller 21 to control the control advance angle.
第６図は第５図の実施例の速度，電流，制御進み角βの
関係を示すもので、０〜t2までは所定の加速率をこえて
いるので所定の重なり角が与えられそれ以後は重なり角
検出器で得られた重なり角をもとにして制御進み角が制
御される。FIG. 6 shows the relationship among the speed, the current and the control advance angle β in the embodiment of FIG. 5. From 0 to t 2 , the predetermined acceleration rate is exceeded, so a predetermined overlapping angle is given and thereafter. The control advance angle is controlled based on the overlap angle obtained by the overlap angle detector.
したがつて、急加減速を行なつても一定の転流余裕時間
γが得られるよう所定の重なり角が与えられ制御進み角
βが制御されるので転流失敗することなく運転ができ
る。Therefore, even if sudden acceleration / deceleration is performed, a predetermined overlapping angle is given and the control advance angle β is controlled so that a constant commutation margin time γ can be obtained, so that operation can be performed without commutation failure.
以上２つの本発明による実施例は速度の加減速率を検出
するのに速度を用いたが、この速度のかわりに速度基準
信号を使用しても同様の効果が得られる。In the above two embodiments of the present invention, the speed is used to detect the acceleration / deceleration rate of the speed, but the same effect can be obtained by using the speed reference signal instead of the speed.
第７図，第８図は、251が電流を入力とする電流レベル
検出器である。電流レベル検出器251は、電流が所定の
値以上となると、スイツチ27を切りかえて重なり角設定
器26で与えられる所定の重なり角ｕを制御進み角β制御
器21に与える。急加減速を行つた場合、速度が所定の加
減速率をこえると電流は所定のレベルをこえるので、こ
の電流の所定のレベルをこえたことでスイツチ27が切り
かえられて、所定の重なり角が与えられるもので同様の
効果を得ることができる。電流レベル検出器251は電流
のレベル比較のほかに、電流の変化率の検出機能をもた
せることにより、電流の急激な変化があつた場合でも、
スイツチ27を切りかえて所定の重なり角を制御進み角β
制御器21に与えて制御進み角βを制御することにより転
流失敗することなく同様の効果を得ることができる。FIGS. 7 and 8 show a current level detector 251 having a current as an input. When the current exceeds a predetermined value, the current level detector 251 switches the switch 27 and gives the control advance angle β controller 21 a predetermined overlap angle u given by the overlap angle setting device 26. In the case of rapid acceleration / deceleration, if the speed exceeds the predetermined acceleration / deceleration rate, the current exceeds the predetermined level.Therefore, when the current exceeds the predetermined level, the switch 27 is switched to give the predetermined overlapping angle. The same effect can be obtained with the used one. In addition to current level comparison, the current level detector 251 has a function of detecting the rate of change of current, so that even if there is a sudden change in current,
Switch 27 is switched to control the predetermined overlap angle Lead angle β
By providing the controller 21 to control the control advance angle β, the same effect can be obtained without causing commutation failure.
以上述べたように急加減速を行なつた場合、速度あるい
は電流より求めた加減速率が所定値以上になつたら電流
より演算する重なり角より一定の重なり角に切りかえる
ので転流失敗することなく安全に運転することができ、
通常はγ一定制御で運転することが可能となる。When rapid acceleration / deceleration is performed as described above, when the acceleration / deceleration rate obtained from the speed or current exceeds a predetermined value, the overlap angle calculated from the current is switched to a constant overlap angle, so commutation does not fail and it is safe. Can drive to
Normally, it becomes possible to operate under the constant γ control.
【図面の簡単な説明】 第１図は従来の交流電動機の制御装置を示す回路構成
図、第２図は電流と制御進み角β、重なり角ｕの関係を
示す図、第３図は本発明による交流電動機の制御装置の
一実施例を示す図、第５図第７図第８図は本発明による
交流電動機の制御装置の他の実施例を示す回路構成図、
第４図と第６図は速度，電流，制御進み角βの関係を示
す図である。 10……三相交流電源、11……しや断器 12……コンバータ、13……直流リアクトル 14……インバータ、15……交流電動機 151……界磁巻線、152……コンバータ 16……速度設定器、17……速度制御器 18……電流制御器、19……位相制御器 20……電流検出器、21……制御進み角β制御器 22……電圧検出器、23……重なり角検出器 24……速度検出器、25……加減速率検出器 26……重なり角設定器、27……スイツチ 28……γ時間制御器、251……電流レベル検出器BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a circuit configuration diagram showing a conventional control device for an AC electric motor, FIG. 2 is a diagram showing a relation between current, control advance angle β, and overlapping angle u, and FIG. 3 is the present invention. FIG. 5 is a diagram showing an embodiment of an AC motor control device according to the present invention, FIG. 5 is a circuit configuration diagram showing another embodiment of the AC motor control device according to the present invention, and FIG.
4 and 6 are diagrams showing the relationship among speed, current and control advance angle β. 10 …… Three-phase AC power supply, 11 …… Shear breaker 12 …… Converter, 13 …… DC reactor 14 …… Inverter, 15 …… AC motor 151 …… Field winding, 152 …… Converter 16 …… Speed setter, 17 ...... Speed controller 18 …… Current controller, 19 …… Phase controller 20 …… Current detector, 21 …… Control lead angle β controller 22 …… Voltage detector, 23 …… Overlap Angle detector 24 …… Speed detector, 25 …… Acceleration / deceleration rate detector 26 …… Overlap angle setter, 27 …… Switch 28 …… γ time controller, 251 …… Current level detector
Claims (2)
コンバータの直流出力を平滑する直流リアクトルと、平
滑された直流を別の交流に変換して交流電動機を駆動す
るインバータと、速度基準と前記交流電動機の速度を比
較して前記コンバータの直流出力を制御する速度制御器
と、前記交流電動機の駆動電流から前記インバータの重
なり角を検出する重なり角検出器と、検出された重なり
角に応じて前記インバータの制御進み角を転流余裕角が
一定となるように制御する制御進み角制御器を具備して
なる交流電動機の制御装置において、前記交流電動機の
速度あるいは速度基準の加減速率が所定値より大きくな
ったとき、前記重なり角検出器で検出した重なり角の代
わりに予め設定した一定の重なり角に切り替えて前記イ
ンバータの制御進み角を制御する重なり角切り替え手段
を設けたことを特徴とする交流電動機の制御装置。1. A converter for converting AC into DC, a DC reactor for smoothing the DC output of the converter, an inverter for converting the smoothed DC into another AC to drive an AC motor, a speed reference and the above. A speed controller that controls the DC output of the converter by comparing the speeds of the AC motors, an overlap angle detector that detects the overlap angle of the inverter from the drive current of the AC motor, and a corresponding overlap angle depending on the detected overlap angle. In a control device for an AC electric motor comprising a control advance angle controller for controlling a control advance angle of the inverter so that a commutation margin angle is constant, a speed of the AC electric motor or a speed-based acceleration / deceleration rate is a predetermined value. When it becomes larger, instead of the overlapping angle detected by the overlapping angle detector, it is switched to a preset constant overlapping angle and the control progress of the inverter is changed. Controller for an AC motor, characterized in that a overlap angle switching means for controlling the angular.
動機の電流、電流の変化率、速度或いは速度指令の変化
率のいずれかが所定値より大きくなったとき、一定の重
なり角に切り替えて、前記電流が所定値以下となったと
き、前記重なり角検出器で検出した重なり角へ戻すこと
を特徴とする特許請求の範囲第１項記載の交流電動機の
制御装置。2. The overlapping angle switching means switches to a constant overlapping angle when any one of the current, the current change rate, the speed, or the speed command change rate of the AC motor becomes larger than a predetermined value, The control device for an AC electric motor according to claim 1, wherein when the current becomes a predetermined value or less, the current is returned to the overlapping angle detected by the overlapping angle detector.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58206878A JPH0728543B2 (en) | 1983-11-05 | 1983-11-05 | AC motor controller |
| US06/667,468 US4633158A (en) | 1983-11-05 | 1984-11-01 | Control system for an AC motor |
| DE8484307624T DE3485176D1 (en) | 1983-11-05 | 1984-11-05 | CONTROL AND REGULATION SYSTEM FOR AN AC MOTOR. |
| EP84307624A EP0144161B1 (en) | 1983-11-05 | 1984-11-05 | Control system for an ac motor |
| CA000467060A CA1252507A (en) | 1983-11-05 | 1984-11-05 | Control system of an ac motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58206878A JPH0728543B2 (en) | 1983-11-05 | 1983-11-05 | AC motor controller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60102888A JPS60102888A (en) | 1985-06-07 |
| JPH0728543B2 true JPH0728543B2 (en) | 1995-03-29 |
Family
ID=16530539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58206878A Expired - Lifetime JPH0728543B2 (en) | 1983-11-05 | 1983-11-05 | AC motor controller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0728543B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3542821B2 (en) * | 1994-03-31 | 2004-07-14 | ヤマハ株式会社 | Karaoke device with features in video compositing system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5883596A (en) * | 1981-11-13 | 1983-05-19 | Toyo Electric Mfg Co Ltd | Controlling method for commutatorless motor |
-
1983
- 1983-11-05 JP JP58206878A patent/JPH0728543B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60102888A (en) | 1985-06-07 |
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