JPH10129905A - Motor controlling method for winder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stably control a line system for conveying a steel band and the like by deciding the number of driving revolutions of a winder on the basis of line speed setting as an operation speed, plate thickness setting for a steel band to be wound, an initial winding diameter setting of the winder, and a rotational speed feedback value of the winder. SOLUTION: In the operation of a steel band conveying line, a controller takes in respective set values for a line speed setting unit 11, an initial winding diameter setting unit 12, and a plate thickness setting unit 13 and a rotational speed feedback value from a rotation detector 5 such as a pulse oscillator of a winder. A quotient of a speed setting value and a rotational speed feedback value is found by means of a divider 21, while a shift average 22 is carried out for eliminating a detection error, and on the basis of a change ratio constant 24 found from the plate thickness setting value and a time factor, multiplication by a change ratio limit 23 is carried out, and a winding diameter measurement value 26 is obtained. Subsequently, a quotient of the winding diameter measurement value is found by means of a divider 27 and a rotational speed setting command 28 is obtained, which is impressed to an actuator, and a winder motor can be rotated at the predetermined rotational speed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the drive of a line-type winder that conveys a steel strip or the like, and more particularly to a control method of a winder operated by controlling the number of revolutions.

[0002]

2. Description of the Related Art Winding machine control of a conveying line system such as a steel strip is roughly classified into two types: winding by tension control and winding by speed (rotation speed) control. It is determined by the control method of the machine. Among these, the latter control of the winding machine by the speed control (rotation speed) is provided with a detector for detecting the line speed, and the detected value is fed back to the control device of the winding machine to constantly control the line speed. Control is performed to match the speed setting value.

[0003]

However, in the conventional control method, feedback from a line speed detector is indispensable. For this detection, a roll rotating in contact with a steel strip or the like of a conveying line detects the line speed. A detector is attached to perform detection. For this reason, control instability due to slippage of the speed detector, generation of scratches on the steel strip, runaway due to abnormal rotation, and the like have occurred, thereby adversely affecting the quality of the product. The present invention has been made in view of the above points, and an object of the present invention is to solve these drawbacks and to provide a stable control method without causing a problem.

[0004]

Means for achieving the object are to set a line speed for determining an operation speed, to set a thickness of a steel strip to be wound, to set an initial winding diameter of a winding machine, and to set a winding speed. Based on the rotation speed feedback of the winding machine, the rotation speed at which the winding machine is operated is determined and controlled without using the line speed detector. As specific means for solving the problem, each setting of the speed setting, the thickness setting, the initial winding diameter setting, and the feedback of the number of revolutions of the winding machine are taken into the controller and controlled.
First, the quotient of the speed setting and the rotation speed feedback is moving averaged, and further, based on the plate thickness setting and the change rate constant from the time element, a change rate limit is applied to obtain a winding diameter measurement value. Next, the quotient of the previous speed setting and the measured winding diameter is given as the rotation speed setting of the winder motor and controlled. Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a control block diagram showing an embodiment of a motor control method for a winder according to the first aspect of the present invention.
Is an embodiment showing a functional block diagram according to claim 2. The same reference numerals in FIGS. 1 and 2 indicate the same functional parts. In FIG. 1, the mechanical configuration of a winding machine of a transfer line system for a steel strip or the like is configured by, for example, a steel strip 1, a feed roll 2, a winder 3, and the like. Further, a control device therefor is provided to the controller 14 by a line speed setting device 1 for determining an operation speed.
1. It comprises an initial winding diameter setting device 12 of a winding machine, a thickness setting device 13 of a steel strip to be wound, and a rotation detector 5 such as a pulse oscillator for outputting as rotation speed feedback of the winding machine.

The controller 14 comprises a line speed setting device 11,
The setting of the initial winding diameter setting device 12 and the thickness setting device 13 and the rotation speed feedback from the rotation detector 5 such as a pulse oscillator of the winding machine are taken in, and the quotient of the speed setting and the rotation speed feedback is divided by a divider 21. Moving average, and further, based on the change rate constant 24 from the plate thickness setting and the time element, multiplies the change rate limit 23,
The winding diameter measurement value 26 is obtained, and then the speed setting and the quotient of the winding diameter measurement value are obtained in a divider 27 by a rotation speed setting command.The rotation speed command of the winder motor is applied to the actuator 15. The winder motor is controlled at a predetermined rotation speed.

[0007] Each functional part input to the controller 14 operates as follows. The rotation speed command 28 is calculated by the equation (1) based on the line speed setting device 11 for determining the operation speed and the winding diameter measurement value 26 obtained by the winding diameter calculation of the controller 14, and is applied to the actuator 15. N = V / πD (1) where N is the rotational speed command 28, V is the line speed setter 11, π is the pi, and D is the winding diameter measurement obtained by the winding diameter calculation. The value is 26.

The measured winding diameter 26 is obtained by dividing the line speed setting device 11 by a command from the winding speed feedback (output signal from the rotation detector 5 such as a pulse oscillator) by the divider 21 and detecting the result. In order to eliminate the error, a moving average 22 is performed, and a change rate constant 24 is determined from this value based on the thickness setting 13 of the steel strip to be wound and a time element, and a change rate limit 23 is performed. When the steel strip 1 is wound by the winding machine, it becomes coiled.
The winding diameter is an initial winding diameter that requires various kinds of accuracy. With respect to the change in the winding diameter at this time, the setting signal from the initial winding diameter setting device 12 of the winding machine is changed by the reset switch 25 and adopted as the measured winding diameter 26 in the initial operation.

[0009]

As described above, according to the winder motor control method of the present invention, the winder can be operated without using the line speed detector without causing the problems of the conventional control method. The number of rotations can be determined, and a stable control method can be provided, which is extremely useful in practical use.

[Brief description of the drawings]

FIG. 1 is a control configuration diagram showing an embodiment of a motor control method for a winder according to claim 1 of the present invention.

FIG. 2 is an embodiment showing a functional block diagram according to claim 2;

[Explanation of symbols]

 Reference Signs List 1 steel strip 2 feed roll 3 winder 4 motor 5 rotation detector such as pulse transmitter 11 line speed setting device 12 initial winding diameter setting device 13 sheet thickness setting device 14 controller 15 actuator 21 divider 22 moving average 23 change rate Limit 24 Change rate constant 25 Reset switch 26 Winding diameter measurement value 27 Divider 28 Revolution command

Claims (2)

[Claims] 1. A method for controlling the number of revolutions of a motor for driving a winder of a conveyor line system such as a steel strip, comprising: setting a line speed for determining an operation speed; setting a thickness of a steel strip to be wound; A winding motor operated by the controller, based on the winding diameter setting of the winding machine and the feedback of the winding speed of the winding machine, without using a line speed detector. Control method. 2. The speed controller, the thickness setting, the initial winding diameter setting, the rotation speed feedback of the winder, and the moving average of the quotient of the speed setting and the rotation speed feedback are taken into the controller. Based on the thickness setting and the change rate constant from the time element, the change rate limit is applied to obtain the winding diameter measurement value, and then the speed setting and the quotient of the winding diameter measurement value are given to the motor as a rotational speed setting command. 2. The control according to claim 1, wherein the initial winding diameter when the coiled steel strip is removed from the winding machine is controlled by a switch to change to an initial winding diameter setting signal of the winding machine. Winder motor control method.