JPH0356090A - Controller for take-up machine - Google Patents

Abstract

PURPOSE:To control a tensile force in good order even if a set value is set in error, by computing the moment of the inertia of a back turn roll automatically from actual operation data under acceleration or deceleration. CONSTITUTION:Through a back turn speed and a take-up speed, by a back turn roll diameter processing circuit 21, a back turn diameter is found, and through back turn motor-generator field current, arithmetic is performed on magnetic flux phi, and through the output of a magnetic flux processing circuit 34 and the motor-generator current, by a torque processing circuit 35, arithmetic is performed on the output torque of a back turn motor-generator. Through a load loss found through the back turn speed by a loss compensating circuit 24, the output torque of the back turn motor-generator, the output of a differentiating circuit 29 for processing the change rate of the back turn speed, and an actual tensile force, the moment of inertia is found by the inertia moment processing circuit 32 of a back turn roll. Additionally in consideration of the moment 37 of the inertia of a spool, the moment of the inertia of a wave is found by an arithmetic machine 31, and through the diameter of the back turn roll, the density and width of the wave are found and are used for controlling.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a control device for a winding machine that continuously winds up roll materials such as paper and film.

(Prior art) In order to calculate the moment of inertia of the roll material of the winder,
The density and width were set by the operator depending on the material and width of the roll material. Therefore, if an error occurs in the density and width settings due to operator error, the error will be applied to the critical acceleration/deceleration current compensation circuit when controlling the winding tension during acceleration/deceleration. This had a negative effect on the tension control of the acceleration and speed injection.

(Problem to be solved by the invention) As mentioned above, the density and width settings of the unwinding roll material were handled manually, so if there was a mistake in the settings,
An error occurs in the acceleration/deceleration current compensation circuit. Further, the density also changes depending on the winding hardness of the unwinding roll, etc., so even if a predetermined setting value is set, it may not necessarily correspond to the actual density of the unwinding roll.

The purpose of the present invention is to solve the above-mentioned problems of the prior art, and to automatically calculate the moment of inertia of the rewind roll from actual operation data during acceleration and deceleration, and to calculate the tension control characteristics during acceleration and deceleration. The goal is to improve.

[Structure of the invention]

(Means for Solving the Problems) The present invention includes a motor generator connected to the central axis of a rewind roll, a rotation speed detector for detecting the rotation speed of the motor generator, and a motor generator connected to a variable speed motor generator. A rewind roll variable speed drive device to drive, an electric motor to drive the surface of the take-up roll, a tachometer to detect the rotational speed of this motor, and a take-up roll variable speed drive device to drive the rewind roll at variable speed. , a tension detector for detecting web tension, a tension setting device for setting the web winding tension, a density setting device for setting the web density, a width setting device for setting the web width, and a winding device. A current reference signal is sent to the unwinding roll variable speed drive device according to the settings of the winding speed setting device, tension setting device, density setting device, width setting device, and winding speed setting device and the detection signal of the tachometer. Also, in the control device of the winding machine that outputs a speed reference signal to the variable speed drive device of the winding roll, the rotational speed of the unwinding roll and the rotational speed of the winding roll detected by the tachometer of the unwinding roll. The rotational speed of the take-up roll detected by the meter is inputted to a rewind roll diameter calculation circuit that calculates the roll diameter of the rewind roll, and a rewind variable speed drive device. A magnetic flux calculation circuit that calculates magnetic flux from the field current of the motor generator; a motor generator torque calculation circuit that calculates the output torque of the motor generator from the output of the magnetic flux calculation circuit and the unwinding armature current; A differentiation circuit that calculates the rate of change in the rotational speed of the return roll, a load loss calculation circuit that calculates the load loss from the rotational speed of the take-up roll, and a tension calculation circuit that calculates the tension of the differentiation circuit, motor generator torque calculation circuit, and load loss calculation circuit. a rewind roll inertia calculation circuit that calculates the inertia moment of the rewind roll from the output;
A web moment of inertia calculation circuit that calculates the web moment of inertia of the rewind roll from the rewind roll inertia moment and the spool inertia moment;
A web constant calculation circuit calculates the web density and the product of 111 from the output of the web moment of inertia calculation circuit and the output of the unwinding roll diameter calculation circuit, and a web constant calculation circuit that calculates the web density and the product of Control of a winding machine comprising a rewinding roll inertia moment calculation circuit that instead calculates the inertia moment of the rewinding roll from the output of the web constant calculation circuit, the spool inertia moment, and the output of the rewinding roll diameter calculation circuit. It is a device.

(Function) In the present invention, the diameter of the rewinding roll is determined by a rewinding roll diameter calculation circuit that increases the diameter of the rewinding roll from the rewinding and winding speed, and the diameter of the rewinding roll is calculated from the rewinding motor generator field current. The output torque of the rewinding motor generator is calculated by a torque calculation circuit that calculates the magnetic flux and calculates the output torque of the motor generator from the output of the magnetic flux calculation circuit and the motor generator current.

Next, the moment of inertia of the rewind roll is calculated from the output of the loss compensation circuit that outputs the load loss based on the rewind speed, the output of the differential circuit that calculates the output torque of the rewind motor generator and the rate of change of the rewind speed, and the actual tension. A rewinding roll inertia calculation circuit calculates the moment of inertia of the web from the spool inertia moment of the rewinding roll and the rewinding roll inertia moment.The inertia calculation circuit calculates the inertia moment of the web. The density/width calculation circuit calculates (density x width) of the web from the moment of inertia and the diameter of the unwinding roll. The moment of inertia for unwinding acceleration/deceleration compensation is calculated based on the density and width, and once operation begins,
Embodiment Next, an embodiment of the present invention will be described. Figures 1 and 2 J
i Motor generator 8 connected to the central axis of the rewinding roll l3
, a rotation speed detector 11 that detects the rotation speed of the motor generator 8, a rewind roll variable speed drive device 6 that drives the motor generator 8 at variable speed, and an electric motor l4 that drives the surface of the winding roll 15. , a tachometer lO that detects the rotational speed of the electric motor 14, a winding roll variable speed drive device 7 that drives the unwinding roll 13 at variable speed, a tension detector 12 that detects the tension of the web 5l, and a tension detector 12 that detects the tension of the web 5l. A tension setting device 2 for setting the winding tension, a density setting device 3 for setting the density of the web 5l, a width setting device 4 for setting the width of the web 51, and a winding speed setting device 5 for setting the winding speed. Then, according to the settings of the tension setting device 2, density setting device 3, width setting device 4, and winding speed setting device 5, and the detection signal of the tachometer 11, a current reference signal C R is sent to the rewinding roll variable speed drive device 6. 8r
Also, a speed reference signal S is sent to the winding roll variable speed drive device 7.
-R8, the rotational speed of the rewinding roll l3 detected by the tachometer 11 of the rewinding roll 13 and the winding speed detected by the tachometer 1l of the winding roll 15. It is inputted from a rewind roll diameter calculation circuit 2l that calculates the roll diameter of the rewind roll 13 from the rotational speed of the take-up roll l5 and a rewind variable speed drive device.

A magnetic flux calculation circuit 34 that calculates magnetic flux from the field current of the motor generator; and a motor generator torque calculation circuit 35 that calculates the output torque of the motor generator from the output of the magnetic flux calculation circuit 34 and the unwinding armature current. , a differentiation circuit 29 that calculates the rate of change in the rotational speed of the rewinding roll 13, a load loss calculation circuit that calculates the load loss from the rotational speed of the take-up roll 15, the differentiation circuit 29 and the motor-generator torque calculation circuit 35. and a rewind roll inertia calculation circuit 32 that calculates the moment of inertia of the rewind roll l3 from the tension output of the load loss calculation circuit, and a web of the rewind roll 13 from the rewind roll inertia calculation circuit 32 and the moment of inertia of the spool. Web minute inertia moment calculation circuit 3l that calculates the minute inertia moment, and web minute inertia moment calculation circuit 3.
1 and the output of the unwinding roll diameter calculation circuit, a web constant calculation circuit 30 calculates the product of web density and width.
In place of the density and width set by the density setter 3 and width setter 4, the moment of inertia of the rewind roll 13 is calculated from the output of the web constant rotor circuit 30 and the spool inertia moment and rewind roll diameter calculation circuit. This figure shows a control device for a winding machine that is equipped with an actual rewind roll inertia moment calculation circuit 32 for calculation.

That is, for the winder control device 1 shown in FIG.
Setting values of tension setting device 2, density setting device 3, width setting device 4, winding speed setting 45, tension detector 12, rotation speed meter to
,ti, operating data of the armature and field current of the rewinding variable speed control device 6 are input, and the current 2! of the rewinding variable speed control device 6 is input. Next, a speed reference is output to the winding variable speed control device 7.

Furthermore, FIG. 2 shows a configuration that calculates the moment of inertia J from actual driving data and is used to compensate for the moment of inertia during acceleration and high-speed driving.

Then, the diameter of the rewind roll is determined by the rewind roll diameter calculation circuit 2l, which calculates the diameter of the rewind roll from the rewind and winding speed, and the magnetic flux Φ is calculated from the field current of the rewind motor generator. The output torque of the rewind motor generator is calculated by a torque calculation circuit 35 which calculates the output torque of the motor generator from the output of the calculation circuit 34 and the motor generator current.

Next, the loss compensation circuit 2 outputs the load loss according to the rewinding speed.
The inertia moment of the rewinding roll is calculated by the rewinding roll inertia calculation circuit from the output of the differential circuit 29 which calculates the output torque of the rewinding motor generator and the rate of change of the rewinding speed, and the actual tension. From the moment of inertia 37 of the spool of the return roll and the moment of inertia of the rewind roll, the moment of inertia of the web is calculated by a moment of inertia calculation circuit 3l that calculates the moment of inertia of the web.
Density/111a calculation circuit 3 that calculates (density x 111) of the web from the moment of inertia of the web and the diameter of the unwinding roll.
The density and width obtained from the actual operation data are calculated using 0, and in the pre-operation state, the moment of inertia for unwinding force and force compensation is calculated using the density and width set as the initial values. After entering the density/width calculation circuit 30
Switch to the output and calculate the moment of inertia.

The roll diameter d of the unwinding roll can be calculated using the following formula: uv It will be held.

However, dWD' Take-up roll drum diameter W: Angular velocity of the take-up roll V W: uw Angular velocity of the roll uV The roll diameter dWD is a fixed value, and the angular velocities Ww and W are measured at the tachometers to and 11, respectively. Detected.

Since the relationship between uv and unwinding field current 1r magnetic flux Φ is uniquely related, the magnetic flux can be determined by setting a function in advance. The output torque TM of the motor-generator for rewinding is determined as follows.

``rM-Kla·Φ...-(2) The loss compensation circuit is calculated by a function generator from the relationship between the machine and the rotation speed.

The moment of inertia J of the entire rewinding roll is calculated using the following formula.

? W T XdT ″″J
■+TL-2 M dt ・・・・・・(3) T Xd . '． J = (TM-TL+ 2) dW /U (4) dt Here, tL: Load loss torque T: Tension O Therefore, the moment of inertia J of the web material is determined by the following formula p.

J　-J-J8　　　　・・・・・・(5〉p J: Moment of inertia of spool S (Including MG Moment) On the other hand, the density is ρ. The width is g, the spool diameter is d, and uvS Then, At, Seek.

Other than ρ・p, ・・・・・・(6) Already wanted the law of nature, ・・・・・・(7) It is required at.

When ρ and ρ are set, the moment of inertia J can be calculated using equation (6).

p Then, the moment of inertia calculation circuit 32 shown in FIG. 2 calculates the rewind roll GD2.

Based on this value, the tension control compensation circuit 27 performs tension control compensation during acceleration/deceleration.

[Effect of the invention] In the present invention, even if there is an error in the density/width setting, it is automatically corrected from the driving data, and the compensation amount during acceleration/speed driving is accurately calculated. This has the effect of stably controlling the tension.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a control device showing an embodiment of the present invention, and FIG. 2 is a block diagram showing the functions of FIG. 21... Unwinder diameter calculation circuit 22... Tension control circuit 23... Rewinding moment of inertia calculation circuit 24... Loss function generator 25... Speed reference circuit 26... Tension torque conversion calculation circuit 27 ...Inertia acceleration/deceleration compensation circuit 28...Speed reference change rate detection circuit 29...Speed change rate detection circuit 30...Density/width calculation circuit 3l...Roll material inertia moment calculation circuit 32.・・・
Rewind roll inertia moment calculation circuit 33...Torque reference calculation circuit 34...Magnetic flux function circuit 35...Rewind motor generator torque calculation circuit 36...
Current reference output circuit

Claims (1)

[Claims] a motor generator connected to the central axis of the rewind roll; a rotation speed detector that detects the rotation speed of the motor generator; a rewind roll variable speed drive device that drives the motor generator at variable speed; An electric motor that drives the surface of the take-up roll, a tachometer that detects the rotational speed of the motor, a take-up roll variable speed drive that drives the unwind roll at variable speed, and a tension detector that detects web tension. a tension setting device for setting the winding tension of the web, a density setting device for setting the density of the web, a width setting device for setting the width of the web, and a winding speed setting device for setting the winding speed. a current reference signal to the unwinding roll variable speed drive device according to the settings of the tension setting device, the density setting device, the width setting device, and the winding speed setting device, and the detection signal of the tachometer. In a control device for a winding machine that outputs a speed reference signal to the variable speed drive device for the winding roll, the rotational speed of the unwinding roll detected by the tachometer of the unwinding roll and the tachometer of the winding roll are detected by the tachometer of the winding roll. The rewind roll diameter calculation circuit calculates the rewind roll diameter from the rotational speed of the take-up roll detected by the rewind roll diameter calculation circuit, and the rewind variable speed drive device inputs the rewind roll diameter. a magnetic flux calculation circuit that calculates magnetic flux from the field current of the motor generator; a motor generator torque calculation circuit that calculates the output torque of the motor generator from the output of the magnetic flux calculation circuit and the unwinding armature current; a differentiation circuit that calculates a rate of change in the rotational speed of the rewinding roll; a load loss calculation circuit that calculates a load loss from the rotational speed of the take-up roll; the differentiation circuit, the motor generator torque calculation circuit, and the load. A rewind roll inertia calculation circuit that calculates the inertia moment of the rewind roll from the tension output of the loss calculation circuit, and a web component moment of inertia of the rewind roll from the rewind roll inertia calculation circuit and the spool inertia moment. a web moment of inertia calculation circuit that calculates the web moment of inertia, a web constant calculation circuit that calculates the product of web density and width from the output of the web moment of inertia calculation circuit and the output of the rewinding roll diameter calculation circuit, and the density setting device. and an actual roll that calculates the moment of inertia of the rewind roll from the output of the web constant calculation circuit, the spool inertia moment, and the output of the rewind roll diameter calculation circuit instead of the density and width set by the width setting device. A control device for a winding machine comprising a return roll moment of inertia calculation circuit.