JPH09239440A - Winding machine driving and controlling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the control precision of a driving and controlling device for a winding machine by providing a changing circuit which selects the tension distribution value distributed with a tension distributor or the total tension standard value, and outputs it to a tension standard circuit. SOLUTION: A tension distributor 10 distributes the total tension standard value outputted from a total tension standard circuit 11 corresponding to the motor capacity of AC motors 4a, 4b. A changing circuit 13 selects the tension distribution value distributed with the tension distributor 10 or the total tension standard value and outputs it to tension standard circuits 9a, 9b. When the tension is high, two stands of AC motors are driven and used, when the tension is low, only AC motor 4a side is applied with the tension standard from the total tension standard circuit 11, and AC motor 4b, is not applied with tension, then only compensation at the time of accelerating, decelerating and the compensation of mechanical loss are executed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a winder drive control device for controlling a winder driven and driven by a plurality of AC electric motors.

[0002]

2. Description of the Related Art In a conventional winding machine drive control device, when a wide range of tension is applied to a strip (winding material), a plurality of AC motors to be driven and a plurality of drive control devices are constructed and used at a low tension. In this system, the number of AC motors to be driven was reduced by disconnecting the coupling (coupling device) that connects multiple units to each other.

This is because when the range of tension applied to the strip is wide, that is, when the tension control range is wide, if the number of AC motors to be driven is one, the tension control accuracy will deteriorate in the low tension range. This is because the tension control range is narrowed by reducing the number of AC motors to be driven so that the tension control accuracy does not deteriorate even in the low tension range.

As described above, in the case of using with a low tension, when the coupling connecting a plurality of units is separated and used, the coupling between the AC motors to be driven can be separated and connected. Used a coupling.

[0005]

DISCLOSURE OF THE INVENTION In the present invention, in a winding machine drive control device which is composed of a plurality of AC motors, and each AC motor drive device is driven individually, the tension control range is (EN) Provided is a winder drive control device which does not separate the coupling connecting a plurality of units even when the tension control range is wide, and does not deteriorate the tension accuracy even in the low tension range even when the tension control range is wide. The purpose is to do.

[0006]

SUMMARY OF THE INVENTION A winder drive control device of the present invention comprises a plurality of AC electric motors for rotationally driving the winder, a coupling for mechanically coupling and driving the AC electric motors, and an AC electric motor. AC drive device for supplying drive power to a motor, a torque reference circuit for giving a drive torque reference value to the AC motor drive device, and a mechanical loss compensation circuit for giving a loss compensation value for compensating mechanical loss of the winder and the AC motor And an acceleration / deceleration compensation circuit that gives an acceleration / deceleration compensation value that compensates the acceleration torque or deceleration torque of the AC motor, a tension reference circuit that gives a tension reference value as a drive torque reference value, and a tension reference value that is output from the tension reference circuit. Of the tension / torque conversion circuit that converts the torque to a torque reference value and outputs it to the torque reference circuit, and an addition that corrects the torque reference value with the loss compensation value or acceleration / deceleration compensation value. A total tension reference circuit for giving a total tension reference value of a path and a plurality of AC motors, and a tension distributor for distributing the total tension reference value output from the total tension reference circuit according to the motor capacity of the AC motor, And a switching circuit that selects a tension distribution value distributed by the tension distributor or a total tension reference value and outputs the selected tension reference value to the tension reference circuit.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of a winder drive control device of the present invention will be described. In FIG. 1, the AC motor 4
Reference numerals a and 4b are electric motors for rotationally driving the winding machine 3 for winding the strip 2 fed through the rolling machine 1. The coupling 5 is a coupler that mechanically couples and drives the AC electric motors 4a and 4b. The AC motor drive devices 6a and 6b are connected to the AC motors 4a and 4b, and the AC motors 4a and 4b are connected to each other.
This is a device for supplying drive power to b.

The torque reference circuits 7a and 7b are connected to the AC motor drive devices 6a and 6b, and the AC motor drive device 6
It is a circuit that gives a drive torque reference value to a and 6b. The mechanical loss (mechanical loss) compensating circuits 14a and 14b are circuits that provide loss compensation values for compensating the mechanical loss of the winder 3 and the AC motors 4a and 4b.

The acceleration / deceleration compensation circuits 12a, 12b are circuits for giving acceleration / deceleration compensation values for compensating the acceleration torque or deceleration torque of the AC motors 4a, 4b. Tension reference circuit 9a,
Reference numeral 9b is a circuit that gives a tension reference value as a drive torque reference value. The tension / torque conversion circuits 8a and 8b are connected to the tension reference circuits 9a and 9b, and convert the tension reference values output from the tension reference circuits 9a and 9b into torque reference values and output them to the torque reference circuits 7a and 7b. Is.

That is, the torque reference for the AC motor drive devices 6a, 6b is given from the torque reference circuits 7a, 7b, but the tension given to the winder 3 is one and given from the total tension reference circuit 11. The tension is distributed by the tension distributor 10 to a tension reference that is proportional to the capacity of each motor, and the tension / torque conversion circuits 8a and 8b convert the tension reference to a torque reference and apply the torque reference circuits 7a and 7b.

The adder circuits 15a and 15b are circuits connected to the mechanical loss compensating circuits 14a and 14b and the acceleration / deceleration compensating circuits 12a and 12b, and correct the torque reference value by the loss compensation value or the acceleration / deceleration compensation value. The total tension reference circuit 11 is a circuit that gives a total tension reference value of the AC motors 4a and 4b.

The tension distributor 10 includes tension reference circuits 9a and 9b.
Is a device for distributing the total tension reference value output from the total tension reference circuit 11 according to the motor capacity of the AC motors 4a and 4b.

The switching circuit 13 is connected to the tension distributor 10, the tension reference circuit 9a and the total tension reference circuit 11, and selects the tension distribution value distributed by the tension distributor 10 or the total tension reference value to select the tension reference circuit. This is a circuit for outputting to 9a and 9b.

That is, the switching circuit 13 selects switching depending on the magnitude of the tension applied to the strip 2, and when one is selected, the reference of the total tension reference circuit 11 is driven by bypassing the tension distributor 10. It is given as a tension standard for the side that has

With the above structure, when the tension is high, the AC motors 4a and 4b are used for driving two units, and when the tension is low, the tension reference from the total tension reference circuit 11 is applied only to the AC motor 4a side in this embodiment. Tension is not given to the AC motor 4b, and only compensation at the time of acceleration and deceleration and compensation of mechanical loss are performed.

By performing acceleration, deceleration compensation and mechanical loss compensation on the AC motor 4b, that is, the motor which is separated by the conventional technique, the tension control range can be controlled within the range of the AC motor 4a. , The AC motor 4b does not need to separate the coupling by performing acceleration, deceleration compensation and mechanical loss compensation,
A normal coupling can be applied to the coupling 5 between the AC motors 4a and 4b.

As described above, according to this embodiment,
Even if the tension control range is wide and the tension is low, even if it had to be separated in the past, by compensating the mechanical loss during acceleration and deceleration for the motor drive unit to be separated. It suffices to perform tension control only for the other motor, and it is possible to perform control with good tension control accuracy without degrading tension control accuracy without using a coupling that can be disconnected or connected to the coupling between the motors. become.

[0018]

According to the present invention, the control accuracy of the winder drive control device can be improved.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a winder drive control device showing an embodiment of the present invention.

[Explanation of symbols]

 1 Rolling mill 2 Strip 3 Winder 4a, 4b AC motor 5 Coupling 6a, 6b AC motor drive device 7a, 7b Torque reference circuit 8a, 8b Tension / torque conversion circuit 9a, 9b Tension reference circuit 10 Tension distribution circuit 11t -Tal tension reference circuit 12a, 12b Acceleration / deceleration compensation circuit 13 Switching circuit 14a, 14b Mechanical loss compensation circuit 15a, 15b Adder circuit

Claims (1)

[Claims] 1. A plurality of AC electric motors for rotationally driving a winding machine, a coupling for mechanically coupling and driving these AC electric motors, and an AC electric motor drive device for supplying drive power to each of these AC electric motors. A torque reference circuit that gives a drive torque reference value to these AC motor drive devices; and a mechanical loss compensation circuit that gives a loss compensation value that compensates for mechanical loss of the winder and the AC motor.
An acceleration / deceleration compensation circuit for giving an acceleration / deceleration compensation value for compensating the acceleration torque or deceleration torque of the AC motor; and a tension reference circuit for giving a tension reference value as the drive torque reference value,
A tension / torque conversion circuit that converts the tension reference value output from the tension reference circuit into the torque reference value and outputs the torque reference value, and the torque reference value to the loss compensation value or the acceleration / deceleration compensation value. A total tension reference circuit for giving a total tension reference value of the plurality of AC motors, and the total tension reference value output from the total tension reference circuit according to the motor capacity of the AC motor. Drive of a winder comprising: a tension distributor for distributing the tension distribution value; and a switching circuit for selecting the tension distribution value distributed by the tension distributor or the total tension reference value and outputting the selected tension reference value to the tension reference circuit. Control device.