JPS61155151A - Winder controller - Google Patents

Abstract

PURPOSE:To prevent a rider roll driving d.c. motor from failing and stopping due to overcurrent upon deceleration, by providing a computing circuit for computing an optimum decelerating time in accordance with the speed of the rider roll driving d.c. motor upon initiation of deceleration and the speed thereof after a predetermined time elapses from the time of initiation of deceleration. CONSTITUTION:If a rider roll 4 which is mechanically separated from a paper wind-up roll 1 is decelerated during operation, a first speed detecting circuit 21 detects the speed S1 of the rider roll 4 at the initiation of deceleration, and a second speed detecting circuit 23 detects the speed S2 after a predetermined time t1 elapses from the initiation of deceleration. A computing circuit 25 calculates an optimum deceleration time t3 in accordance with these detected speeds S1, S2 and the detected time t1, and this calculated optimum deceleration time t3 is substituted for the actual optimum deleration time as a set value. Accordingly, the deceleration time may be made to be optimum, and therefore, it is possible to prevent a rider roll d.c. motor 7 from failing and stopping due to overcurrent operation, thereby it is possible to carry out a stable wind-up operation.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a winding machine, and more particularly to a winding machine control device that performs speed control with respect to a speed reference having a certain acceleration/deceleration rate.

[Technical background of the invention and its problems]

A conventional winding machine control device of this type will be explained with reference to FIG. In the figure, 1 is a paper roll, 2 is a rear roll,
3 is a front roll, 4 is a rider roll, and the rear roll 2, front roll 3, and rider roll 4 are each driven by a common thyristor power source by a DC machine. That is, numerals 5, 6, and 7 are DC machines that drive the rolls 2, 3, and 4, and 8 is a speed detector directly connected to the DC machine 5. Further, 9 is a speed reference power supply, 10 is an acceleration/deceleration rate circuit, 11 is an acceleration time setter, and 12 is a deceleration time setter. The signal from the speed reference power source 9 is given to an acceleration/deceleration rate circuit 10.
0, acceleration time setter 11, deceleration time setter 1211C
A speed reference signal is generated so that the acceleration and deceleration times are properly determined. Furthermore, this speed reference signal and the speed detection signal of the speed detector 8 are compared and amplified by an amplifier 13, and the difference signal controls the dart of the thyristor power supply 14 that commonly drives each of the DC machines 5, 6.7. Speed control is performed by doing this. , 15 is a field power supply common to each of the DC machines 5, 6.7, and 16, 17.
Reference numeral 18 designates an overcurrent detector provided in the main circuit of each DC machine 5°6.7.

Now, in such a winding machine control device, winding operation is performed by alternating between acceleration and deceleration, but the winding paper roll 1 and rider roll 4 are decelerated either while in contact or when they are separated. There are cases. Here, there is no particular problem if you decelerate and stop with the two in contact, but if you decelerate and stop with the two separated,
With the permissible braking torque of the DC machine 7 that drives the rider roll 4, the stopping time of the rider roll 4 may be longer than the deceleration rate time of the rear roll 2. In this case, an overcurrent may flow as braking torque into the main circuit of the DC machine 7 that drives the rider roll 4, resulting in a failure and stoppage.

This state will be explained with reference to Figure 5.'' In Figure 5,
S-t is the driving speed at the start of the deceleration command, the human speed reference rate, and B the rider roll speed rate.

That is, with the paper web roll 1 and the rider roll 4 separated, at a moment of deceleration L7'l, the rear roll 2 and the front roll 3 are decelerated according to the speed standard rate A, and the rider roll 4 is decelerated as per the rider roll speed rate B. It may slow down. In this case, near the time t2, the back electromotive voltage of the DC machines 5 and 6 is almost negligible, and becomes K when an overcurrent determined from the back electromotive voltage of the DC machine 7 and the main circuit impedance flows and the machine stops due to a failure.

[Purpose of the invention]

The present invention was made to eliminate the above-mentioned problems, and its purpose is to prevent overcurrent during deceleration even when multiple DC machines operated by a common thyristor power source are not in mechanical contact. It is an object of the present invention to provide a winding machine control device capable of performing stable winding operation without causing failure or stoppage due to operation.

[Summary of the invention]

In order to achieve the above object, the present invention includes a rear roll and a front roll for driving a winding material roll;
A winding machine that winds up a material by means of a rider roll that is provided in mechanical contact with the material roll to be taken up and pressurizes the material roll to be taken up against the rear roll and front roll. In a winding control device that performs speed control by controlling the output of a power supply that commonly drives each DC machine for each roll drive with respect to a speed reference having a deceleration rate, the above-mentioned rider roll drive at the start of deceleration is a first speed detection circuit that detects the speed of the DC machine for driving the rider roll; a second speed detection circuit that detects the speed of the DC machine for driving the rider roll after a certain period of time has elapsed from the start of deceleration; and an arithmetic circuit that calculates an optimum deceleration time based on the speeds detected by the first speed detection circuit and the second speed detection circuit, respectively, during deceleration so as to achieve the optimum deceleration time calculated by the arithmetic circuit. changing the setting of the deceleration rate, or detecting the main circuit current of the DC machine for driving the rider roll after the start of deceleration, and comparing the detected current value with a preset current value; The deceleration rate is maintained on the condition that the detected current value as a result of discrimination by the current discriminator is greater than or equal to the upper limit of the DC machine allowable value with respect to the current setting value, and the current detected value is The present invention is characterized in that the retention of the deceleration rate is released on the condition that the value is less than or equal to the lower limit value within the DC machine allowable value with respect to the current setting value.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention shown in FIG. 1 will be described. FIG. 1 shows an example of the configuration of a winding machine control device according to the present invention, and the same parts as in FIG. 4 are given the same reference numerals, and the explanation thereof will be omitted, and only the different parts will be described here.

In the figure, 21 is a speed detection circuit that detects the speed of the rider roll 4, and 22 is a contact that is provided at its input stage and temporarily closes in response to a deceleration command. 23 is a certain period of time 1. from the deceleration command. A speed detection circuit 24 for detecting the speed of the rider roll 4 after the elapse of time is provided at its input stage, and is connected to the speed detection circuit 24 for a certain period of time from the deceleration command. This is a contact that temporarily closes after the lapse of time. It is also a 25-degree calculation circuit, and the speed Six detected by the speed detection circuit 21 is also the speed S detected by 23! Based on this, calculate the optimum deceleration time t3 using sl t3 == There is. Note that 26 is a speed detector for the rider roll 4. Furthermore, when changing the setting of the deceleration reference rate to t3, the deceleration reference rate is changed gradually rather than in steps.

It is preferable to use a winding machine control device having such a circuit configuration. For example, when the rider roll 4 is mechanically separated from the winding paper roll 1 and is decelerated to a stop during operation, the rider roll 4 at the starting point of deceleration is The speed Sl is detected by the speed detection circuit 2.
The speed is detected at , and after t1 time has passed while deceleration starts again, the speed S! is detected by the speed detection circuit 23, and the optimum deceleration time t3 is calculated by the calculation circuit 25 from each detected speed S1+81 and t1 time, and the calculated deceleration time t3 in parentheses is calculated.
is set as the optimum deceleration time. Therefore, since the deceleration time becomes the optimum deceleration rate, there is no possibility of failure and stoppage due to overcurrent operation during deceleration as in the conventional case, and extremely stable winding operation can be performed.

Next, FIG. 2 shows another embodiment of the present invention.

This will be explained based on FIG. As described above, the same parts as in FIG. 4 are designated by the same reference numerals, and their explanation will be omitted.

In the figure, 27 is a current discriminator that discriminates the main circuit current of the DC machine 7 that drives the rider roll 4. The auxiliary relay 30 is operated on the condition that the upper limit value within the range is reached, and the deceleration reference rate is maintained at the contact 31 of the auxiliary relay 30. Further, the current discriminator 27 is configured to reset the auxiliary relay 30 on the condition that the main circuit current reaches a certain lower limit value with respect to the current setting value preset by the setting device 28. There is. Therefore, the auxiliary relay 30 operates when the upper limit value is exceeded, and returns when the lower limit value is below. Note that the contact 29 is provided at the input stage of the current discriminator 27, and is closed in response to a deceleration command.

By providing a winding machine control device having such a circuit configuration, it is possible to prevent failure and stoppage due to overcurrent operation during deceleration as in the conventional case. This state will be explained with reference to FIG.

In FIG. 3, C indicates the speed reference rate and D indicates the rider roll speed rate. That is, after the start of deceleration, if the deceleration rate of the rider roll 4 and the deceleration rate of the I770-ru 2 are different as shown in the figure, the main circuit current of the DC machine 2 that drives the rider roll 4 increases, and the current discriminator 27
subject to the upper limit value. When this upper limit value is reached, the deceleration reference rate 32 is maintained by the operation of the auxiliary relay 30, and therefore the main circuit current of the DC machine 7 that drives the rider roll 4 is reduced. On the other hand, when this main circuit current reaches the lower limit value, the auxiliary relay 3
When the value returns to 0, the holding of the deceleration reference rate is canceled and deceleration starts again.

Therefore, by doing this, it becomes possible to decelerate and stop without causing a failure or stop due to overcurrent operation during deceleration.

〔Effect of the invention〕

As explained above, according to the present invention, even if a plurality of DC machines operated by a common thyristor power supply are not in mechanical contact, the deceleration time is set to the optimum deceleration rate, and overcurrent operation is performed during deceleration. It is possible to provide an extremely reliable winding machine control device that can perform stable winding operation without failure and stoppage.

[Brief explanation of drawings]

Fig. 1 is a circuit configuration diagram showing one embodiment of the present invention, Figs. 2 and 3 are block diagrams and characteristic diagrams showing other embodiments of the invention, and Figs. FIG. 2 is a circuit configuration diagram and a characteristic diagram showing a molten machine control device. 1...t[M roll, 2...rear roll, 3...
Front roll, 4... Lighter roll, 5-7... DC machine, 8.26... Speed detector, 9... Speed reference power supply, 10... Acceleration/deceleration rate circuit, 11... Acceleration time Setting device, 12...Deceleration time setting device, 14...Thyristor power supply, 15...Field power supply, 16-18...Overcurrent detector, 21.23...Speed detection circuit, 22° 24
．． 29.31... Contact, 25... Arithmetic circuit, 27.
...Current discriminator, 28...Setter, 30...Auxiliary relay 〇Applicant's agent Patent attorney Takehiko Suzue Figure 1 Figure 2 Figure 3

Claims (2)

[Claims] (1) A rear roll and a front roll for driving the winding material roll, and a rider that is provided so as to be able to make mechanical contact with the winding material roll and pressurizing the winding material roll against the rear roll and the front roll. A winding machine that winds up material using rolls.The speed can be adjusted by controlling the output of the power supply that commonly drives each DC machine for driving each roll, with respect to a speed standard with a certain acceleration rate and deceleration rate. A winding machine control device that performs control includes a first speed detection circuit that detects the speed of the DC machine for driving the rider roll at the start of deceleration, and a first speed detection circuit that detects the speed of the DC machine for driving the rider roll after a certain period of time has elapsed from the start of deceleration. a second speed detection circuit that detects the speed of the DC machine for use; and an arithmetic circuit that calculates an optimal deceleration time based on the speeds detected by the first speed detection circuit and the second speed detection circuit, respectively. Prepare,
A winding machine control device characterized in that the setting of the deceleration rate is changed during deceleration so that the deceleration time becomes the optimum deceleration time calculated by the arithmetic circuit. (2) A rear roll and a front roll for driving the winding material roll, and a rider that is provided so as to be able to make mechanical contact with the winding material roll and pressurizing the winding material roll against the rear roll and the front roll. A winding machine that winds up material using rolls.The speed can be adjusted by controlling the output of the power supply that commonly drives each DC machine for driving each roll, with respect to a speed standard with a certain acceleration rate and deceleration rate. In a winding machine control device that performs control, a current discriminator detects a main circuit current of the direct current machine for driving the rider roll after the start of deceleration, and compares the detected current value with a preset current setting value. The deceleration rate is maintained on the condition that the detected current value as a result of the discrimination by the current discriminator is greater than or equal to the upper limit within the allowable value of the DC machine with respect to the current setting value, and the detected current value is A winding machine control device comprising means for releasing the holding of the deceleration rate on the condition that the set value is less than or equal to a lower limit value within a DC machine allowable value.