Devices for position-controlled stopping of rotating components with position-controlled drive mechanisms in the case of voltage loss

Abstract

The invention relates to a method for position-controlled stopping of rotating components of shaftless drive mechanisms in the case of voltage loss, whereby the lacking process power arising from a lack of rotational power is supplied by means of an external connectable network.

Description

[0001] The invention relates to devices for position-controlled stopping of rotating components with position-controlled drive mechanisms in the case of voltage loss, according to the features of claims 1 or 6.

[0002] In the case of a voltage loss, the drive mechanisms of a production train, e.g. of a web-fed rotary printing press, are stopped in a controlled, angularly synchronous manner in order to thus prevent a rupture of the web. Units with excess kinetic energy, e.g. rotating centrifugal masses, are brought to a stop within the normal rapid stop sequence through controlled reduction of the kinetic energy, e.g. by means of braking resistances, so-called bleeders.

[0003] Those units, e.g. folding apparatuses, which cannot supply enough rotational energy in relation to the required process energy during the normal rapid stopping time, are continuously operated by means of external, uninterruptible power supplies, so-called UPS's, in order to be able to exert the required process energy in case of a voltage loss.

[0004] The object of the invention is to produce devices for position-controlled stopping of rotating components with position-controlled drive mechanisms in the case of a voltage loss.

[0005] This object is attained according to the invention by means of the features of claims 1 and 6.

[0006] The advantages that can be achieved with the invention are comprised particularly in that those units with an insufficient inherent kinetic energy for the controlled stopping are only supplied with the differential energy quantity required for the stopping process, i.e. the differential energy quantity between the existing rotation energy quantity and the process energy quantity required for the respective drive mechanism.

[0007] In a second embodiment, some components of a conventional UPS can also be eliminated in that only the energy storage device of the UPS is used.

[0008] The invention will be explained in detail below in conjunction with two exemplary embodiments.

[0009] FIG. 1 shows a schematic circuit diagram of a circuit arrangement according to the invention in a first exemplary embodiment;

[0010] FIG. 2 shows a schematic circuit diagram of a circuit arrangement according to the invention in a second exemplary embodiment.

[0011] A rotating component 01, e.g. a folding apparatus of a web-fed rotary printing press, is driven in a speed-controlled and position-controlled manner by means of a shaftless drive mechanism 02, e.g. an electric motor. The electric motor 02 receives its energy supply via a line 03 from a known drive converter 04, which is connected via a line 06, an electronic switch 07, a network-disconnecting switch 08, and a line 09 to an operating network 11, e.g. of 400 Volt three-phase current.

[0012] The drive converter 04 can be comprised at least of sub-units, not shown, such as a rectifier, an intermediate DC circuit, a DC-AC converter, and a control element. In addition, the drive converter 04 can contain a dropping resistor or bleeder in order to convert excess braking energy into heat if necessary.

[0013] For the eventuality of a voltage loss of the operating network 11, the drive converter 04 is connected via a line 12 to an electronic switch 13, which is parallel to the switch 07 and is connected via a network-disconnecting switch 14 and a line 16 to an external network 17, e.g. with an external uninterruptible power supply 17, a so-called UPS network 17, e.g. of 400 Volt AC current.

[0014] Between the drive converter 04 and the electronic switches 07 and 13, control lines 19 are provided, which are depicted with dashed lines. A tachometer generator T coupled to the electric motor 02 is likewise connected via a control line 18 to the drive converter 04. The drive converter 04 contains a control element, not shown.

[0015] In the case of a voltage loss of the operating network 11 (FIG. 1), the electronic switches 07; 13 switch from the operating network 11 over to the external power supply 17 in an uninterrupted fashion. As a result, the electric motor 02 is supplied via the drive converter 04 and the line 03 with enough differential energy ED, e.g. 15 kWs, for the rotating component 01 to receive a total process energy EP, e.g. 50 kWs, required for a correctly-positioned stopping, when added to the e.g. 35 kWs from the rotation energy ER of the folding apparatus 01.

[0016] According to another embodiment of the invention, the correctly-positioned stopping of the rotating component 22, e.g. a folding apparatus, driven in a shaftless manner by an electric motor 21, is carried out by means of an uninterruptible power supply 29, 31, which is connected directly to a drive converter 23 (FIG. 2).

[0017] The drive converter 23 is essentially comprised of a rectifier 24, an intermediate DC element 26, and a DC-AC converter 27. The drive converter 23 is also associated with a known bleeder 28 as a braking resistance, and a battery 31, e.g. 400 Volt, with an associated battery management 29.

[0018] All of the sub-units 21, 26 to 28, 29, 31 are connected to a control element 33 via a control line 32.

[0019] A separate power supply, as depicted in position 17 in FIG. 1, can be omitted in this instance since the input and output elements 24; 27, e.g. the rectifier 24 and DC-AC converter 27, which are respectively provided in the power supply 17 and in the drive converter 23, can be used together.

[0020] Consequently, only the battery management 29 and the battery 31, e.g. with 15 kWs, (temporarily) take over for the former external uninterruptible power supply, i.e. are associated with the intermediate DC element 26 of the drive converter 23.

[0021] In the case of a failure of the operating network 11, the battery management 29 switches over to battery operation. The differential energy ED, e.g. of 15 kWs, thus obtained from the power supply 29, 31, together with the rotation energy ER, e.g. 35 kWs, of the folding apparatus 22, is sufficient to supply the required process energy EP, e.g. of 50 kWs.

[0022] The intermediate DC element 26 is connected via lines 36 to the bleeder 28, as well as the power supply 29, 31.

Reference Numeral List

[0023] 01 rotating component, folding apparatus

[0024] 02 shaftless drive mechanism, electric motor

[0025] 03 line (04; 02)

[0026] 04 drive converter

[0027] 05 -

[0028] 06 line (04; 07)

[0029] 07 electronic switch

[0030] 08 network-disconnecting switch (09)

[0031] 09 line

[0032] 10 -

[0033] 11 operating network

[0034] 12 line

[0035] 13 electronic switch

[0036] 14 network-disconnecting switch

[0037] 15 -

[0038] 16 line

[0039] 17 power supply; external network; uninterruptible energy source

[0040] 18 control line

[0041] 19 control line

[0042] 20 -

[0043] 21 shaftless drive mechanism, electric motor

[0044] 22 rotating component, folding apparatus

[0045] 23 drive converter

[0046] 24 rectifier

[0047] 25 -

[0048] 26 intermediate DC element

[0049] 27 DC-AC converter

[0050] 28 bleeder (23)

[0051] 29 battery management

[0052] 30 -

[0053] 31 battery (29)

[0054] 32 control line

[0055] 33 control element

[0056] 34 -

[0057] 35 -

[0058] 36 line

[0059] T tachometer generator

[0060] EP process energy

[0061] ER rotation energy

[0062] ED differential energy

Claims

1. A device for position-controlled stopping of rotating components (01; 22) with position-controlled drive mechanisms (02; 21) in the case of voltage loss, wherein the rotating component (01; 22) is supplied with a required differential energy (ED) that is the difference between the existing rotation energy (ER) of the rotating component (01; 22) and the process energy (EP) required for a correctly-positioned stopping of the rotating component (01; 22), wherein an external network is provided, which supplies the differential energy (ED), characterized in that the external network (17) has a battery (31).

2. The device according to claim 1, characterized in that a capacitance of the external network (17) is based solely on the differential energy (ED).

3. The device according to claim 1, characterized in that the drive mechanism (02; 21) of the rotating component (01; 22) is preceded by a drive converter (04; 23).

4. The device according to claim 1, characterized in that the rotating component (01; 22) is disposed in a folding apparatus (01; 22) of a web-fed rotary printing press.

5. The device according to claim 1, characterized in that at least one switch (07; 13) is disposed between an operating network (11) and an uninterruptible energy source (17):

6. A device for position-controlled stopping of rotating components (22) with position-controlled drive mechanisms (21) in the case of voltage loss and, through the use of a drive converter (23)—which is at least comprised of a rectifier (24), an intermediate DC circuit (26), a DC-AC converter (27), and a control element (33)—and an uninterruptible energy source (17)—which is at least comprised of a rectifier (24), a DC circuit (26), a DC-AC converter (27), a battery management (29), a battery (31), and a control element (33)—, characterized in that the uninterruptible energy source (17) can be connected to at least the input and output elements (24; 27) of the drive converter (23).

7. The device according to claim 6, characterized in that the battery management (29) and the battery (31) of the uninterruptible energy source (17) can be connected to the intermediate DC element (26) of the drive converter (23).