JPS589590A - Motor control device - Google Patents
Motor control deviceInfo
- Publication number
- JPS589590A JPS589590A JP56106761A JP10676181A JPS589590A JP S589590 A JPS589590 A JP S589590A JP 56106761 A JP56106761 A JP 56106761A JP 10676181 A JP10676181 A JP 10676181A JP S589590 A JPS589590 A JP S589590A
- Authority
- JP
- Japan
- Prior art keywords
- speed
- output
- torque
- motor
- controllable rectifier
- 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
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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、電圧形インバータを制御して電動機を速度制
御する電動機制御装置に関するものである０
従来、この種の装置として第１図に示すものがあった。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a motor control device that controls the speed of an electric motor by controlling a voltage source inverter. Conventionally, there has been a device of this type as shown in FIG. 1.
図において、（１）は６０ Ｈ２の通常の交流母線（Ｒ
，Ｓ、Ｔ）に接続さ扛た可制御整流器、（２）は上記可
制御整流器（１）の出力側に接続さｎ１コイル（２ａ）
とコンデンサ（２ｂ）とからなる直流中間回路、（８）
は上記直流中間回路（２）を介して可制御整流器（１）
に接続さｎ１スイツチングサイリスタ（３ａ）と帰還ダ
イオード（３ｂ）とからなるインバータで、上記可制御
整流器（１）、直流中間回路（２）、及びインバータ（
ｉｌ＋１とから、一般に電圧形インバータと称される変
換器主回路が構成さｎｌこの電圧形インバータ（４）か
ら供給される電力によって電動機（６）は制御される。In the figure, (1) is a 60 H2 normal AC bus (R
, S, T) are connected to the controllable rectifier, (2) is the n1 coil (2a) connected to the output side of the controllable rectifier (1).
and a DC intermediate circuit (8) consisting of a capacitor (2b) and a capacitor (2b).
is the controllable rectifier (1) via the DC intermediate circuit (2).
An inverter consisting of an n1 switching thyristor (3a) and a feedback diode (3b) connected to the controllable rectifier (1), the DC intermediate circuit (2) and the inverter (
il+1 constitutes a converter main circuit generally called a voltage source inverter (nl).The electric motor (6) is controlled by the power supplied from the voltage source inverter (4).
なお、上記電圧形インバータ（４）には、さらに直流電
流検出回路（５ａ）と直流電圧検出回路（５ｂ）が含ま
れている。Note that the voltage source inverter (4) further includes a DC current detection circuit (5a) and a DC voltage detection circuit (5b).
しかして、（γンは上記電動機（６）と機械的に結合し
てその回転数を計測する速度指針器、（８）は電動機（
６）の速度を設定する速度設定器であり、上記速度設定
器（８）と速度指針器（７）の出力は速度制御器（９）
に導びかれてその両者の誤差が増巾され、さらにこの速
度制御器（９）と速度指針器（７）の出力は加算回路に
導びかれて加算され、その加算出力が電圧／周波数変換
器（ロ）に入力し、また電圧制御器（２）に入力するよ
う構成さ扛ており、電圧形インバータ（４）は上記電圧
／周波数変換器αηの出力に基いてその出力電圧の周波
数が制御器ｎて電動機（６）に電力を供給する。Therefore, (γn is a speed indicator mechanically connected to the electric motor (6) and measures its rotation speed, and (8) is the electric motor (
6), and the output of the speed setting device (8) and speed pointer (7) is the speed controller (9).
The outputs of the speed controller (9) and speed indicator (7) are further led to an adder circuit and added, and the added output is converted into a voltage/frequency converter. The voltage source inverter (4) is configured such that the frequency of its output voltage is determined based on the output of the voltage/frequency converter αη. The controller supplies power to the electric motor (6).
さらに、上記電圧増巾器（２）は、電圧検出器（５ｂ）
と加算器叫の出力を入力しその両者の誤差を増巾して電
流増巾器０呻に出力し、また電流増巾器θ呻は電流検出
器（５ａ）と上記電圧制御器ｔｉａの出力を入力してそ
の両者の誤差を増巾する。即ち、速度制御器（９）、加
算器叫、′１延圧／周波数変換器（ロ）、電圧制御器（
２）、及び電流制御器α呻は、電動機（６）の制御回路
ａ→を構成するもので、可制御整流器（１）、及びイン
バータ（４）を速度設定器（８）の設定速度に一定制御
する。Furthermore, the voltage amplifier (2) includes a voltage detector (5b)
and the output of the adder are input, the error between them is amplified and outputted to the current amplifier 0, and the current amplifier θ is the output of the current detector (5a) and the voltage controller tia. is input to amplify the error between the two. That is, the speed controller (9), the adder, the '1 rolling/frequency converter (b), and the voltage controller (
2) and the current controller α constitute the control circuit a→ of the electric motor (6), and control the controllable rectifier (1) and the inverter (4) at a constant speed set by the speed setting device (8). Control.
しかるに、従来の制御装置は以上のように構成さｎてい
たため、例えば誘導電動機（６）の負荷トルクが急変し
トルク指令が変化した場合には、トルク指令に見会うト
ルク分電流、即ち可制御整流器（１）を介して流れる直
流電流がすみやかに流れ得なく、その結果、トルク分電
流は、直流中間回路のコンデンサ（２ｂ）より供給され
ることになり、直流電圧が低下して、ひいては誘導電動
機（６）の電圧が低下し過渡的にトルクが発生せず速い
速度応答を得ることができなかった。However, since the conventional control device is configured as described above, for example, when the load torque of the induction motor (6) suddenly changes and the torque command changes, the current corresponding to the torque corresponding to the torque command, that is, the controllable current is changed. The DC current flowing through the rectifier (1) cannot flow quickly, and as a result, the torque component current is supplied from the capacitor (2b) of the DC intermediate circuit, resulting in a decrease in DC voltage and, as a result, induction The voltage of the electric motor (6) decreased and no torque was generated transiently, making it impossible to obtain a fast speed response.
本発明は、上記のような従来のものの欠点を除去するた
めになされたもので、負荷トルクが急変した場合にその
トルク指令に見合った直流電流をすみやかに流すことが
できて電圧変動を押さえることができ、ひいては速い速
度応答を得ることができる電動機制御装置を提供するも
のである。The present invention was made in order to eliminate the drawbacks of the conventional ones as described above, and it is possible to quickly flow a direct current corresponding to the torque command when the load torque suddenly changes, thereby suppressing voltage fluctuations. The object of the present invention is to provide an electric motor control device that can achieve a fast speed response.
以下、本発明の一実施例を第１図と同一部分は同一符号
を附して示す第２図に基いて説明する０第２図において
、本発明による速度制御回路（ト）は、電流制御器０呻
に速度制御器（９）の出力が直接導びかれるよう構成式
ｎており、負荷トルクが急変して速度制御器（９）の出
力が急変した場合でも、トルク指令に見合う直流電流を
可制御整流器（１）からすみやかに供給さｎるようにな
っていて、速い速度応答が得られるようになっている０
なお、第２図中、ＦＸは速度基準、ＩＩＩＭは速度帰還
ｙ：は滑９周波数指令 Ｖ：は発振周波数指令であり
、また速度制御器（９）の動作により定常的には、？、
”＝ＰＭとなるように電圧形インバータ（４）の発振周
波数′ｊＩ。Hereinafter, one embodiment of the present invention will be explained based on FIG. 2, in which the same parts as in FIG. The configuration formula is such that the output of the speed controller (9) is directly led to the output of the speed controller (9). is supplied immediately from the controllable rectifier (1), resulting in a fast speed response.
In Fig. 2, FX is the speed reference, IIIM is the speed feedback, y: is the sliding frequency command, V: is the oscillation frequency command, and ? ,
The oscillation frequency 'jI of the voltage source inverter (4) is set so that "=PM.
が制御さｎるようになっている０
次に、第２図構成における動作を説明すると、公知のよ
うに誘導電動機（６）の発生トルクＴは漕力周波数１８
が小さい範囲で、゛
・・・（１）
のように表わす事ができる０
但し
５−
Ｐ ：誘導電動機極数
■Ｍ：誘導電動機端子電圧
ア。：誘導電動機端子周波数
従って、
とすｎば、発生トルクＴは、滑り周波数Ｆ８に比列する
ことが理解される。また、このトルクを発生するのに必
要なトルク分電流は、可制御整流器（１）を介して供給
てれ、電動機（６）の励磁電流は直流中間回路（２）の
コンデンサ（２ｂ）より供給されるようになっている。Next, to explain the operation in the configuration shown in FIG. 2, as is well-known, the generated torque T of the induction motor (6) is
In a small range, it can be expressed as ゛...(1) 0 However, 5- P: Number of induction motor poles ■M: Induction motor terminal voltage A. :Induction motor terminal frequency Therefore, if n, it is understood that the generated torque T is proportional to the slip frequency F8. In addition, the torque current necessary to generate this torque is supplied via the controllable rectifier (1), and the exciting current for the motor (6) is supplied from the capacitor (2b) of the DC intermediate circuit (2). It is supposed to be done.
即ち、第２図構成においては、”
・・・（８）Ｔｏｃ］Ｆ ｏｃより０
が成立し、定常的には電圧制御器（ロ）と電圧／周数数
変換器（ロ）の働らきにより
Ｏ
が任意の周波数１゜で成立する。ｆだ負荷トルクが変動
し、速度制御器（９）の出力が変化すれば、滑 ６−
り周波数指令ＦＢ が変化するようになっており、滑
り周波数指令ＦＩに見合うトルク指令Ｔ１相当分の直流
電流ら。が電流制御器０呻の働らきて可制御整流器（１
）よりすみやかに供給さｎる。That is, in the configuration shown in FIG.
...(8) Toc] 0 is established from F oc, and O is established at an arbitrary frequency of 1° due to the functions of the voltage controller (b) and voltage/frequency converter (b). do. If the load torque fluctuates and the output of the speed controller (9) changes, the slip frequency command FB changes, and the DC current equivalent to the torque command T1 corresponding to the slip frequency command FI changes. Current et al. The current controller works as a controllable rectifier (1
) will be supplied more quickly.
言い換えれば、電動機（６）のトルクが変動して、速度
制御器（９）の出力Ｖ：が変動してもトルク分電流はす
みやかに可制御整流器（１）より供給され、直流中間回
路のコンデンサ（２ｂ）には電動機（６）の励磁分電流
しか流れないため直流電圧は変動しない。In other words, even if the torque of the motor (6) fluctuates and the output V: of the speed controller (9) fluctuates, the torque current is immediately supplied from the controllable rectifier (1) and the capacitor of the DC intermediate circuit Since only the excitation current of the motor (6) flows through (2b), the DC voltage does not fluctuate.
また上式（ｉ） 、 （２）が成立するので、トルク（
Ｔ）は滑９周波数Ｆ８に比例することになり、電圧変動
を押えて従来より速い速度応答が得らｎる０以上のよう
に本発明によｎば、負荷トルクが変動した場合に七ｎに
見合う速度制御器の出力に基づき直流電流を可制御整流
器からすみやかに供給する速度制御回路を備ているので
、電圧変動を抑制して速い速度応答が得らｎる電動機制
御装置を得ることができる。Also, since the above equations (i) and (2) hold true, the torque (
T) is proportional to the sliding frequency F8, which suppresses voltage fluctuations and provides faster speed response than before. According to the present invention, when the load torque fluctuates, Since the present invention is equipped with a speed control circuit that promptly supplies direct current from a controllable rectifier based on the output of a speed controller corresponding to can.
第１図は従来の電動機制御装置を示す接続図、 ７−
第２図は本発明による電動機制御装置の接続図である。
（１）・・・可制御整流器
（２）・・・直流中間回路
（８）＠・・インバータ （４）・・・電圧形インバー
タ（６）・・・電動機 （７）・・・速度指針器（
８）・・・速度設定器 （９）＠−・速度制御器（ロ）
・・・電圧／周波数変換器
α呻・・・電流制御器
ａ荀、 （１５）・・・速度制御回路
なお、図中、同一符号は同一、又は相当部分を示す。
代理人 葛 野 信 −
８−FIG. 1 is a connection diagram showing a conventional motor control device, and FIG. 7-2 is a connection diagram of a motor control device according to the present invention. (1)... Controllable rectifier (2)... DC intermediate circuit (8) @ Inverter (4)... Voltage type inverter (6)... Electric motor (7)... Speed indicator (
8) Speed setting device (9) @- Speed controller (b)
. . . Voltage/frequency converter α, current controller a, (15)… Speed control circuit. In the drawings, the same reference numerals indicate the same or equivalent parts. Agent Shin Kuzuno − 8 −
Claims (1)
デンサで成る直流中間回路と、この直流中間回路を介し
て上記可制御整流器の出力を入力して電動機に電力を供
給するインバータとでなる電圧形インバータを構成する
と共に、上記電動機の回転速度を検出する検出手段の検
出信号と速度設定器の設定値との誤差に基いて上記イン
バー、夕の出力周波数を制御し、かつ、上記可制御整流
器の出力を制御する速度制御回路を備え、上記電動機を
速度制御する電動機制御装置において、上記速度制御回
路を、上記速臀検出手段の検出信号と速度設定器の設定
値との誤差に基いて上記可制御整流器の出力を制御する
構成とし、負荷トルクが急変した場合には上記可制御整
流器から急変に見合う直流電流を出力させることを特徴
とする電動機制御装置。A voltage type consisting of a controllable rectifier connected to an AC bus, a DC intermediate circuit consisting of a coil and a capacitor, and an inverter that inputs the output of the controllable rectifier through this DC intermediate circuit and supplies power to the motor. The inverter is configured to control the output frequency of the inverter based on the error between the detection signal of the detection means for detecting the rotational speed of the motor and the setting value of the speed setting device, and the controllable rectifier. In a motor control device that controls the speed of the electric motor and includes a speed control circuit that controls an output, the speed control circuit is configured to control the speed control circuit based on the error between the detection signal of the speed detection means and the setting value of the speed setting device. 1. A motor control device characterized in that the output of a control rectifier is controlled, and when load torque suddenly changes, the controllable rectifier outputs a direct current commensurate with the sudden change.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56106761A JPS589590A (en) | 1981-07-08 | 1981-07-08 | Motor control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56106761A JPS589590A (en) | 1981-07-08 | 1981-07-08 | Motor control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS589590A true JPS589590A (en) | 1983-01-19 |
Family
ID=14441885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56106761A Pending JPS589590A (en) | 1981-07-08 | 1981-07-08 | Motor control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS589590A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61109491A (en) * | 1984-10-31 | 1986-05-27 | Mitsubishi Electric Corp | Motor controller |
-
1981
- 1981-07-08 JP JP56106761A patent/JPS589590A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61109491A (en) * | 1984-10-31 | 1986-05-27 | Mitsubishi Electric Corp | Motor controller |
| JPH057956B2 (en) * | 1984-10-31 | 1993-01-29 | Mitsubishi Electric Corp |
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