JPS6232402U

JPS6232402U -

Info

Publication number: JPS6232402U
Application number: JP1985124011U
Authority: JP
Priority date: 1985-08-14
Filing date: 1985-08-14
Publication date: 1987-02-26

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例を示す回路図、第２
図、第３図および第４図はそれぞれ正常運転時、
衝突時および負荷増大時のモータ回転速度、加速
度、電流の時間的変化を示すタイムチヤートであ
る。１…微分器、２…（＋）極性加速度判別器、３
…（−）極性加速度判別器、４…（＋）極性加速
度比較器、６，７…ＡＮＤ回路、８，１６…ＮＡ
ＮＤ回路、９…（−）極性電流比較器、１０…（
＋）極性電流比較器、１１…ＯＲ回路、１２…衝
突信号発生回路、１３…タイマ、１４…負荷過大
信号発生回路、１５…（−）極性加速度比較器。 Figure 1 is a circuit diagram showing one embodiment of the present invention;
Figures 3 and 4 are for normal operation, respectively.
This is a time chart showing temporal changes in motor rotation speed, acceleration, and current during a collision and when load increases. 1...Differentiator, 2...(+) polarity acceleration discriminator, 3
...(-) Polarity acceleration discriminator, 4...(+) Polarity acceleration comparator, 6, 7...AND circuit, 8, 16...NA
ND circuit, 9...(-) polarity current comparator, 10...(
+) polarity current comparator, 11...OR circuit, 12...collision signal generation circuit, 13...timer, 14...excessive load signal generation circuit, 15...(-) polarity acceleration comparator.

Claims

[Scope of utility model registration request]

A servo drive system abnormality detection device that detects the occurrence of a collision or overload in a servo drive system that drives a mechanical system with a servo motor detects the polarity of current and acceleration of the servo motor, and detects whether they are compatible with each other. Equipped with a collision detection circuit that determines a collision based on the fact that the vehicle is in the opposite direction, and an overload detection circuit that determines an overload based on the fact that the acceleration is zero and a current of a predetermined value or more continues for more than a predetermined time. An abnormality detection circuit for a servo drive system featuring: