JPS61149997U

JPS61149997U -

Info

Publication number: JPS61149997U
Application number: JP1985031832U
Authority: JP
Priority date: 1985-03-06
Filing date: 1985-03-06
Publication date: 1986-09-16

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例を示す構成図、第２
図はモータ制御電圧と第１の比較器の説明図、第
３図はタコジエネレータ出力と第２の比較器の説
明図である。図中、１は第１の比較器、２は第２の比較器、
３は演算器、４はモータ駆動アンプ、５はモータ
、６はスイツチング素子、７はタコジエネレータ
（回転検出器）である。 Fig. 1 is a configuration diagram showing one embodiment of the present invention;
The figure is an explanatory diagram of the motor control voltage and the first comparator, and FIG. 3 is an explanatory diagram of the tachogenerator output and the second comparator. In the figure, 1 is the first comparator, 2 is the second comparator,
3 is a computing unit, 4 is a motor drive amplifier, 5 is a motor, 6 is a switching element, and 7 is a tachogenerator (rotation detector).

Claims

[Scope of utility model registration request]

A DC motor that rotates an object to be rotated, a switching element interposed in the current conduction path of the motor, and a motor control voltage whose voltage value decreases as it approaches the adjustment point of the object to be rotated are input, and the switching element is applied to the motor. a drive amplifier that applies a drive current through the element; a rotation detector that detects the rotation of the motor; a first comparator that detects whether the motor control voltage is at a value near the adjustment point; a second comparator for detecting whether the output of the rotation detector is a value indicating rotation of the motor at a predetermined speed or less;
and an arithmetic unit that outputs a control signal for forcibly turning off the switching element when it is determined from the output of the second comparator that the motor is generating excessive torque. motor control device.