JPH0186498U - - Google Patents
Info
- Publication number
- JPH0186498U JPH0186498U JP1987179041U JP17904187U JPH0186498U JP H0186498 U JPH0186498 U JP H0186498U JP 1987179041 U JP1987179041 U JP 1987179041U JP 17904187 U JP17904187 U JP 17904187U JP H0186498 U JPH0186498 U JP H0186498U
- Authority
- JP
- Japan
- Prior art keywords
- torque
- hysteresis comparator
- comparator means
- magnetic flux
- command
- 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
- 230000004907 flux Effects 0.000 claims description 6
- 230000006698 induction Effects 0.000 claims description 5
- 230000005347 demagnetization Effects 0.000 claims 1
- 230000005415 magnetization Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 1
Landscapes
- Control Of Ac Motors In General (AREA)
Description
第１図は本考案にかかる誘導電動機のトルク制
御装置のブロツク図、第２図は従来のトルク制御
系のブロツク図、第３図はスイツチ状態変数表に
よるインバータの出力電圧ベクトル図、第４図は
電動機の１次磁束ベクトルの瞬時制御方法を示す
磁束状態図、第５図はトルク波形図、第６図は磁
束のヒステリシスコンパレータの状態制御図、第
７図はトルクの３値ヒステリシスコンパレータの
状態制御図であり、第８図は本考案の一実施例に
用いた変調器の動作を説明するためのグラフであ
つて、ａは鋸歯状波発生器の出力波形図、ｂは変
調器の出力波形図である。
１……直流電圧源、２……電圧検出器、３……
ＰＷＭインバータ、５ｕ，５ｖ，５ｗ……電流検
出器、６……誘導電動機、７……制御回路、７１
４……鋸歯状波発生器、７１５……変調器。
Figure 1 is a block diagram of the induction motor torque control device according to the present invention, Figure 2 is a block diagram of a conventional torque control system, Figure 3 is an inverter output voltage vector diagram based on a switch state variable table, and Figure 4. is a magnetic flux state diagram showing the instantaneous control method of the primary magnetic flux vector of the electric motor, Fig. 5 is a torque waveform diagram, Fig. 6 is a state control diagram of the magnetic flux hysteresis comparator, and Fig. 7 is the state of the torque three-value hysteresis comparator. FIG. 8 is a control diagram, and FIG. 8 is a graph for explaining the operation of the modulator used in an embodiment of the present invention, in which a shows the output waveform of the sawtooth wave generator, and b shows the output of the modulator. FIG. 1...DC voltage source, 2...Voltage detector, 3...
PWM inverter, 5 u , 5 v , 5 w ... current detector, 6... induction motor, 7... control circuit, 71
4...Sawtooth wave generator, 715...Modulator.
Claims (1)
瞬時１次磁束ベクトルおよび瞬時トルクを演算す
る手段と、前記１次磁束ベクトルの長さが所定の
誤差内で与えられた磁束指令値に追従するように
増磁または減磁指令を生成する第１のヒステリシ
スコンパレータ手段と、前記トルクが与えられた
トルク指令に所定の誤差内で追従するように１次
磁束ベクトルの位相の進行、停止指令を生成する
第２のヒステリシスコンパレータ手段と、１次磁
束ベクトルの位相に対応して第１および第２のヒ
ステリシスコンパレータ手段の出力指令に最適な
インバータの出力電圧ベクトルを決定する手段と
を有する誘導電動機のトルク制御装置において、
前記第２のヒステリシスコンパレータ手段のヒス
テリシス値よりも低いトルク指令が与えられた場
合にはトルク指令を前記ヒステリシス値に等しい
振幅のオンオフパルス列に変換するパルス幅変調
手段を具えたことを特徴とする誘導電動機のトル
ク制御装置。 Means for calculating an instantaneous primary magnetic flux vector and instantaneous torque from the primary terminal voltage and current of a three-phase induction motor; a first hysteresis comparator means for generating a magnetization or demagnetization command; and a first hysteresis comparator means for generating a phase advance and stop command for the primary magnetic flux vector so that the torque follows the applied torque command within a predetermined error. Torque control of an induction motor having second hysteresis comparator means and means for determining an inverter output voltage vector optimal for the output commands of the first and second hysteresis comparator means corresponding to the phase of the primary magnetic flux vector. In the device,
The induction device is characterized by comprising pulse width modulation means for converting the torque command into an on-off pulse train having an amplitude equal to the hysteresis value when a torque command lower than the hysteresis value of the second hysteresis comparator means is given. Torque control device for electric motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987179041U JPH0626079Y2 (en) | 1987-11-25 | 1987-11-25 | Induction motor torque control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987179041U JPH0626079Y2 (en) | 1987-11-25 | 1987-11-25 | Induction motor torque control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0186498U true JPH0186498U (en) | 1989-06-08 |
| JPH0626079Y2 JPH0626079Y2 (en) | 1994-07-06 |
Family
ID=31470630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987179041U Expired - Lifetime JPH0626079Y2 (en) | 1987-11-25 | 1987-11-25 | Induction motor torque control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0626079Y2 (en) |
-
1987
- 1987-11-25 JP JP1987179041U patent/JPH0626079Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0626079Y2 (en) | 1994-07-06 |
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