JPH0421196U - - Google Patents
Info
- Publication number
- JPH0421196U JPH0421196U JP1990059690U JP5969090U JPH0421196U JP H0421196 U JPH0421196 U JP H0421196U JP 1990059690 U JP1990059690 U JP 1990059690U JP 5969090 U JP5969090 U JP 5969090U JP H0421196 U JPH0421196 U JP H0421196U
- Authority
- JP
- Japan
- Prior art keywords
- speed
- excitation current
- rated
- induction motor
- slip frequency
- 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
- 230000005284 excitation Effects 0.000 claims description 9
- 230000006698 induction Effects 0.000 claims description 7
- 230000003313 weakening effect Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 8
Landscapes
- Control Of Ac Motors In General (AREA)
Description
第１図は本考案の誘導電動機の制御装置の実施
例を示すブロツク図、第２図および第３図は本発
明に使用する励磁電流基準関数発生回路およびす
べり周波数関数発生回路の特性図、第４図は弱め
界磁制御を行う誘導電動機の励磁電流と誘起電圧
との特性図、第５図ａおよびｂは定格速度および
最高速度でのトルクースピード特性図、第６図は
従来の制御装置の実施例を示すブロツク図、第７
図および第８図はその関数発生回路の特性図、第
９図は従来方式を説明するための特性図である。
１……電源、２……整流回路、３……ＰＷＭイ
ンバータ、４……誘導電動機、５……回転センサ
ー、６……ベクトル演算回路、７……電流検出器
、８……三角波発信器、９……電流制御アンプ、
１０……比較器、１１……励磁電流基準関数発生
回路、１２……すべり周波数関数発生回路。
FIG. 1 is a block diagram showing an embodiment of the control device for an induction motor according to the present invention, and FIGS. 2 and 3 are characteristic diagrams of the excitation current reference function generating circuit and slip frequency function generating circuit used in the present invention. Figure 4 is a characteristic diagram of excitation current and induced voltage of an induction motor that performs field weakening control, Figures 5 a and b are torque-speed characteristic diagrams at rated speed and maximum speed, and Figure 6 is a diagram of the implementation of a conventional control device. Block diagram showing an example, No. 7
8 and 8 are characteristic diagrams of the function generating circuit, and FIG. 9 is a characteristic diagram for explaining the conventional system. 1... Power source, 2... Rectifier circuit, 3... PWM inverter, 4... Induction motor, 5... Rotation sensor, 6... Vector calculation circuit, 7... Current detector, 8... Triangular wave oscillator, 9...Current control amplifier,
10... Comparator, 11... Excitation current reference function generation circuit, 12... Slip frequency function generation circuit.
Claims (1)
号を入力とし、ベクトル制御を用いて誘導電動機
の弱め界磁制御を行う制御装置において、ベクト
ル演算回路内の励磁電流を設定する為に、誘導電
動機の最高速度ではその速度における定格励磁電
流を出力し、最高速度から定格速度の間は定格ト
ルクと最大トルクの比が略一定となる励磁電流関
数を出力する励磁電流設定回路と、 ベクトル演算回路内のすべり周波数を設定する
為に、最高速度ではその速度における定格すべり
周波数を出力し、最高速度から定格速度の間は前
記励磁電流設定回路にて設定した励磁電流におい
て定格トルクを発生するすべり周波数関数を出力
するすべり周波数設定回路と を備えたことを特徴とする誘導電動機の制御装置
。[Claim for Utility Model Registration] In a control device that uses the output signal of a speed sensor attached to an induction motor as input and performs field weakening control of the induction motor using vector control, for setting the excitation current in a vector calculation circuit. , an excitation current setting circuit that outputs the rated excitation current at the maximum speed of the induction motor at that speed, and outputs an excitation current function such that the ratio of the rated torque to the maximum torque is approximately constant between the maximum speed and the rated speed; In order to set the slip frequency in the arithmetic circuit, at the maximum speed, the rated slip frequency at that speed is output, and between the maximum speed and the rated speed, the rated torque is generated at the excitation current set by the excitation current setting circuit. A control device for an induction motor, comprising a slip frequency setting circuit that outputs a slip frequency function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990059690U JPH0421196U (en) | 1990-06-07 | 1990-06-07 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990059690U JPH0421196U (en) | 1990-06-07 | 1990-06-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0421196U true JPH0421196U (en) | 1992-02-21 |
Family
ID=31586411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990059690U Pending JPH0421196U (en) | 1990-06-07 | 1990-06-07 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0421196U (en) |
-
1990
- 1990-06-07 JP JP1990059690U patent/JPH0421196U/ja active Pending
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