JPS634197U

JPS634197U -

Info

Publication number: JPS634197U
Application number: JP9530286U
Authority: JP
Priority date: 1986-06-24
Filing date: 1986-06-24
Publication date: 1988-01-12

Description

[Brief explanation of the drawing]

第１図は、この考案の一実施例を示す停止位置
制御回路図、第２図は第１図の停止位置制御回路
の要部の回路図、第３図は従来の停止位置制御回
路図、第４図は従来の停止位置制御時におけるイ
ンバータへの周波数指令を説明するための特性図
、第５図は摩擦力が変化した場合の停止位置のバ
ラツキを示す特性図、第６図はこの考案における
差動増幅回路からの速度信号出力を示す特性図、
第７図はこの考案における最終調整区間でのイン
バータ周波数指令と実速度との関係を示す特性図
である。図中の符号１は誘導電動機、２はインバータ、
３は減速機構、４は被位置制御対象物、５はエン
コーダ、６は周波数信号パターン設定回路、７は
Ｆ―Ｖコンバータ、８は周波数指令補正回路であ
る。なお、図中同一符号は同一または相当部分を
示す。 FIG. 1 is a stop position control circuit diagram showing an embodiment of this invention, FIG. 2 is a circuit diagram of the main part of the stop position control circuit shown in FIG. 1, and FIG. 3 is a conventional stop position control circuit diagram. Figure 4 is a characteristic diagram to explain the frequency command to the inverter during conventional stop position control, Figure 5 is a characteristic diagram showing the variation in stop position when the frictional force changes, and Figure 6 is a characteristic diagram of this invention. A characteristic diagram showing the speed signal output from the differential amplifier circuit in
FIG. 7 is a characteristic diagram showing the relationship between the inverter frequency command and the actual speed in the final adjustment section in this invention. In the figure, 1 is an induction motor, 2 is an inverter,
3 is a deceleration mechanism, 4 is a positionally controlled object, 5 is an encoder, 6 is a frequency signal pattern setting circuit, 7 is an FV converter, and 8 is a frequency command correction circuit. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims

[Scope of utility model registration request]

A stop position control circuit that controls the stop position of an induction motor using an inverter includes a frequency-voltage converter circuit that detects the actual speed from the minimum bit signal of a position feedback signal from a position detection encoder, and an output of the converter circuit. a differential amplifier circuit that detects and amplifies the difference between the frequency command voltage and the frequency command voltage; and a signal from the differential amplifier circuit that is added to the frequency command voltage as a speed correction signal in a final adjustment section in the position control operation. A stop position control circuit characterized by having an addition circuit.