DE202004011035U1 - Drive unit for the shed formation mechanism, at a loom, has an electromotor with a variable speed and direction reverse, an additional inertia mass and a combined brake/clutch for coupling to the loom drive shaft - Google Patents

Abstract

The drive unit (1) for the shed formation mechanism, at a loom, is an electromotor (2) with a rotor (2a) and a stator (2b) to operate at variable speeds and with reversing of the direction of rotation. The motor has an additional inertia mass (3) and an electromagnetic switched combined brake/clutch (4) with a keyed brake component (4a) and rotating components (4b,4c). The combined brake/clutch is held within a mounting bell (5), secured to the mounting shield (7) of the electromotor towards the loom, by a housing (6) and fasteners (10) at one end, The other end of the bell is keyed (8) to the loom (9).

Description

The The invention relates to a drive unit for a weaving machine with a variable in speed and direction of rotation Electric motor, preferably with an additional flywheel and with an electromagnetic switchable clutch-brake combination.

The The invention further relates to a weaving machine with shedding means, the drive of the shedding means optionally from a drive unit derived from the weaving machine or a separate drive, with a Main drive shaft and wherein the main drive shaft with the at least a drive unit is connected, the drive unit at least has an electric motor with variable speed and direction of rotation, which electric motor with a power electronic designed as a frequency converter Actuator is operated, the frequency converter is a voltage intermediate circuit converter and the power electronic actuator is capable of regenerative power supply, wherein further the loom one between the electric motor and the main drive shaft arranged electromagnetically switchable Has clutch-brake combination and wherein the drive unit preferably has an additional flywheel.

The Invention relates above in addition a weaving machine network, comprising n weaving machines with shedding means, the drive of the shedding means optionally from the main drive derived from the weaving machine or a separate drive, whereby each loom has a main drive shaft, with each loom at least one drive unit operably connectable to the main drive shaft with a variable in speed and direction of rotation, consisting of rotor and stator existing electric motor, which electric motor with a designed as an inverter power electronic actuator is operated, which actuator is part of the drive unit and further between the electric motor and the main drive shaft an electromagnetically switchable clutch-brake combination is arranged is.

at previously known drive solutions for weaving machines an electric motor drive drives a V-belt as a pulley trained flywheel on with the help of an electromagnetic Clutch-brake combination on the main drive shaft of the weaving machine is coupled and thus a positive connection between the electric motor drive and the main drive shaft.

A such drive solution requires a relatively large amount of space due to its open design; the drive components are subject to a high degree of contamination and operating the weaving machine at slow speed requires an additional one electric motor drive with the necessary electronics and with gear means, usually a reduction gear.

Out EP 0 514 959 B1 a method and a device for driving a weaving machine in slow speed is known. The slow running of a weaving machine is necessary in order, for example, to remedy an inadequacy which occurs, for example a weft break occurring during the weaving process, immediately after it has occurred. For this purpose, the operating speed is reduced to the speed 0 by suitable means and the inadequacy is remedied when the main drive motor runs slowly. It is known in this context that during the slow running of the main drive motor, the excitation is carried out as a function of the position, taking into account the load and / or the required speed of the weaving machine parts to be driven.

The mentioned here Drive device dispenses with a separate electromotive Additional drive for operating the weaving machine at slow speed.

It is also known from EP 0 726 345 A1 a drive for a weaving machine with a main drive motor, which is connected by means of a transmission to first elements to be driven and to second elements to be driven. The first elements to be driven are essentially understood to be the shedding elements which are designed as a dobby, an eccentric machine, a jacquard machine or as another type of shedding means.

To The second elements to be driven essentially include here Weaving shop and - in case of rapier weaving machines - the Gripper drives.

Within of the mentioned Gearbox is a shift gear arranged in different ways Switching positions is adjustable, that in a switching position Drive connection between the main drive motor and the first and second elements to be driven and that in another Switch position the drive connection to the first or second driven elements is interrupted.

Finally over EP 0 953 073 B1 known a drive for a loom, comprising a main drive shaft mounted in a machine frame, which is driven by an electromotive drive. The motor shaft of the drive is coaxial with the main drive shaft of the Webma arranged and directly connected to the machine.

Previously known Drive solutions, which are effective as so-called direct drives do without one Clutch-brake combination between electric motor drive and main drive shaft of the loom.

It is therefore an object of the invention in a closed and compact Design, variable speed high-performance electromotive drive unit for a weaving machine to create which by means of a clutch-brake combination the main drive shaft of the weaving machine can be coupled.

The The drive unit should be able to keep the loom inside a period from a weaving cycle to a predefinable operating speed to accelerate and vice versa the weaving machine from an operating speed can be brought to a standstill within a weaving cycle, that is be braked down to the operating speed 0.

Further should the drive unit fluctuate in the operating speed of the Avoid the weaving machine as much as possible and be suitable for the weaving machine without a separate electric motor drive associated electronic control and gear means in slow speed too operate.

The Drive unit should be above maintenance work, especially on the clutch-brake combination allow without significant installation effort on the drive unit is required.

The The object is achieved by the Characteristics of the independent Expectations 1, 16, 19 and 24 solved.

The Drive unit for the weaving machine comprises a variable in speed and direction of rotation, consisting of rotor and stator electric motor, preferably one Additional flywheel mass, one made of non-rotating parts and rotating parts Share existing, switchable clutch-brake combination as well one the non-rotatable parts (brake side) of the clutch-brake combination receiving mounting bell, the first end of which is taken using suitable precautions with the bearing plate of the electric motor facing the loom is connected and the second end of suitable precautions for non-rotatable Has connection with the weaving machine.

If An additional flywheel is preferably mentioned here, it can consist in that the rotor of the electric motor has a comparatively large diameter with a comparatively large one Mass has to the function of the flywheel known from the prior art to take over.

The Additional flywheel can therefore be an integral part of the invention Be rotors.

The Additional flywheel can in a further embodiment of the invention an additional Be component that is connected to the free end of the shaft of the rotor is such that the additional flywheel mass as a rotationally symmetrical body between the electric motor and the clutch-brake combination is. The aforementioned suitable arrangements for connecting the Assembly bell with the motor end shield include means, the as a complete or partial housing of the additional flywheel is pronounced.

The Additional flywheel as an additional component can also be used as a fan wheel for removal the engine heat be trained.

The Electric motor of the drive unit is gem. the invention an asynchronous motor with short-circuit rotor.

For the purpose of change the direction of rotation of the electric motor can be switched, the Coils of the electric motor have a winding that at least has two different numbers of pole pairs.

To the Example of change its speed is the electric motor with a power electronic Actuator operated in the manner of a frequency converter, which is designed as a voltage intermediate circuit converter is.

Should the electric motor and possibly the weaving machine are stopped or to reduce their speed or to reverse the direction of rotation, a braking process must take place in which the kinetic energy of the Electric motor, the additional flywheel, the rotating parts of the clutch-brake combination, the weaving machine itself and, if necessary, further components via the converter (generator) effective electric motor is converted into electrical energy, the above a regenerative power electronic Actuator is fed into the electrical supply network.

To is both for feeding electrical energy into motor Operation of the drive unit as well as for regenerative power supply with generator Operation of the drive unit in each case a correspondingly designed feed unit intended.

A Loom acc. the independent Claim 16 comprises shedding means, a main drive shaft, at least one by means of a clutch-brake combination on the main drive shaft detachable drive unit, which drive unit at least one variable in speed and direction of rotation, has an electric motor consisting of rotor and stator and which is preferably equipped with an additional flywheel.

The Electric motor is designed with a frequency converter Power electronic actuator operated. The frequency converter is a voltage intermediate circuit converter and the power electronic Actuator is able to regenerate the kinetic energy from the weaving machine braking and their rotary driven components and from the drive unit yourself over the electric motor of the drive unit which acts as a converter (generator) feed back into the electrical supply network as electrical energy to be able to.

essential to the invention in a weaving machine comprising the aforementioned features, that the rotor of the electric motor, the rotatable parts of the Clutch-brake combination that at least one additional flywheel and the main drive shaft are arranged to each other that they have the same axis of rotation.

In A further embodiment of the invention can drive the shedding means either derived from the main drive shaft of the loom be or the subject training means by means of at least one of their own Electric motor driven.

A sees further solution according to the invention before, several looms with the features specified in claim 16 in an energetic network, a so-called weaving machine network, to operate and the inverters of the drive units of several looms with a common electrical voltage intermediate circuit connect to.

Further is for the drive units of all weaving machines are shared rectifier supply unit capable of regenerative power supply provided which is connected to the electrical voltage intermediate circuit is.

In An energetic combination of weaving machines can also be the feed electrical energy during motor operation of the drive units via a first common feed unit, which is an electrical DC link is connected while regenerative power with generator operation of the drive units via second feed unit, which is also connected to the electrical DC link is connected.

On further energetic combination of weaving machines with the characteristics of the preamble of claim 24 is characterized in that the Inverters of the drive units of several weaving machines with connected to a common electrical voltage intermediate circuit are and that for the drive units of the weaving machines have a shared braking resistor is present, which over suitable means connected to the electrical voltage intermediate circuit is.

In further design of the energetic network of several weaving machines can the at least one regenerative unit or the at least one braking resistor can be designed such that simultaneous stopping braking from multiple weaving machines maximum operating speed is possible.

The The invention will be explained in more detail below using an exemplary embodiment.

In Show the drawings:

1 an electromotive drive unit with additional flywheel in a coupled state with a weaving machine,

2 the electric motor drive unit after 1 uncoupled from the weaving machine,

3 the schematic representation of a known frequency converter in connection with the electric motor of the drive unit after 1 .

4 the schematic representation of the known frequency converter in connection with the electric motor of the drive unit after 1 , if there is no switch (brake chopper) and braking resistor after 3 .

5 the schematic representation of the known frequency converter in connection with the electric motor of the drive unit after 1 with the possibility of feeding electrical energy back into the supply network and

6 the schematic representation of the known frequency converter in connection with the electric motor of the drive unit after 1 , with the possibility of dispensing with switches (brake chopper) and braking resistor acc. 5 feed electrical energy back into the supply network.

Gem. 1 there is an electromotive drive unit 1 for a weaving machine 9 , which are only hinted at by a side cheek is set, from an electric motor variable in speed and direction of rotation 2 , from an additional flywheel 3 and a clutch-brake combination 4 ,

The electric motor 2 will, as in the 3 to 6 shown, via a frequency converter 13 fed with electrical energy.

To maintain a closed and compact design of the drive unit is gem. of the invention, the clutch-brake combination 4 from a so-called assembly bell 5 enclosed, which in turn, in the direction of the engine end shield 7 seen through lanyards 10 with an enclosure 6 for the rotatable with the shaft of the electric motor 2 connected additional flywheel mass 3 is mounted.

The enclosure 6 in turn is then via other lanyards 10 with the end shield 7 of the electric motor 2 connected.

The structure and functioning of the clutch-brake combination 4 as a link between the electric motor drive and the weaving machine is generally known, so that a more detailed description can be dispensed with here.

An essential feature of the invention in the 1 and 2 illustrated embodiment can now be seen in the fact that the rotor 2a of the electric motor 2 , the rotating parts 4b . 4c the clutch-brake combination 4 , the main drive shaft 11 the loom 9 and the preferably present at least one additional flywheel 3 the same axis of rotation 12 have.

Based on the in 2 illustrated embodiment it is clear that the electric motor drive in a simple manner and without significant installation effort 2 from the so-called brake side of the clutch-brake combination 4 is separable. By loosening the first connection means 10 is the electric motor 2 with the additional flywheel 3 easily from the machine-fixed assembly bell 5 separable. This has the advantage that, for example, an adjustment or readjustment that becomes necessary or a replacement that is necessary with the main drive shaft 11 non-rotatably connected armature disk 4c the clutch brake combination 4 is inexpensive to carry out.

3 shows a frequency converter known from the prior art using a simplified or schematic representation 13 for the electric motor 2 the drive unit according to the invention 1 ,

The dining network 14 , i.e. the supply network, is with three conductors 14.1 . 14.2 and 14.3 shown as a three-phase three-phase network. The frequency converter 13 assigned supply unit 15 converts the mains voltage into a voltage with a generally high DC voltage component. In the prior art, one then speaks of a voltage intermediate circuit 16 or also DC link. The feed unit 15 is not able in this exemplary embodiment to draw electrical energy from the voltage intermediate circuit 16 into the supply network 14 feed back. Such a non-regenerative feed unit is inexpensive. In the prior art, such a design is often referred to as a so-called uncontrolled B6 bridge.

In the DC link 16 is mostly a capacity 17 provided, which serves, among other things, the voltage in the voltage intermediate circuit 16 to stabilize.

The inverter 18 finally, the voltage from the DC link converts 16 back into an AC or three-phase voltage; ie you have an alternating or three-phase system again 19 , which differs primarily in rms voltage, frequency, phase position and number of strands from the supply network 14 can distinguish. In the 3 it is, for example, a three-phase three-phase system 19 ,

The three-phase or alternating current system 19 is used to operate the electric motor 2 , Should the electric motor 2 and possibly the weaving machine 9 If the motor is stopped or its speed is reduced or if the direction of rotation is to be reversed, a braking process must be carried out using kinetic energy from the electric motor 2 , if necessary from the flywheel 3 the rotating parts 4b . 4c the clutch-brake combination 4 or the weaving machine 9 and optionally other components of the loom, not shown, via the electric motor 2 is converted into electrical energy as a converter (generator) and as electrical energy via the electricity system 19 and the inverter 18 to the DC link 16 arrives - as long as one does not want or cannot give the aforementioned rotating devices the time to coast down due to their own losses.

The feed unit 15 can not this energy to the feeding network 14 pass on and the capacity 17 can only absorb this energy to a certain extent, otherwise the voltage in the DC link 16 becomes unacceptably high.

Using a switch 20 , often referred to in the prior art as a chopper or brake chopper, this energy is instead the at least one braking resistor 21 fed, which they in Wär me implemented. The lengths of the switch's on and off times are often determined 20 taking into account the level of voltage in the voltage intermediate circuit 16 established.

The kinetic energy of the engine 2 itself and the at least one flywheel, if any 3 is however very high. Frequent braking results in the braking resistor 21 correspondingly a lot of heat. The braking resistor 21 must therefore be made large enough to be able to radiate the heat to the surroundings. Ie that, for example, a control cabinet in which the braking resistor 21 installed, must be large enough and / or have to be cooled.

Therefore, according to the invention, using an inverter 18 provided, either a direct current braking or a counter current braking or a short-circuit braking of the electric motor 2 make what except the electric motor 2 , the at least one flywheel, if any 3 , the rotating parts 4b . 4c the clutch-brake combination 4 , if necessary the weaving machine 9 and if necessary, further components are braked accordingly. The procedures for direct current braking, countercurrent braking and short-circuit braking itself are adequately described in the prior art. They have the effect that the kinetic energy is significantly converted into engine heat. The braking resistor 21 and also the switch 20 can be designed accordingly smaller, as well as the necessary radiation area for the engine heat. The proportions of the kinetic energy converted into heat via the braking resistor 21 and via direct current braking or counter current braking or short-circuit braking can be influenced in relation to one another - preferably by the type of control of the inverter 18 and the switch 20 , If necessary, this can be made possible for the operator / operator, for example by giving recommendations or it can be done independently by control means. If necessary, the switch 20 and the braking resistor 21 be completely dispensed with. The arrangement acc. 3 is then reduced to the switch 20 and the braking resistor 21 ,

4 shows a correspondingly reduced arrangement of a frequency converter 13 ,

In 5 has the supply unit 25 the same task as the supply unit 15 in 3 , but is in contrast to the supply unit 25 in 5 also able to draw energy from the DC link 26 into the feeding network 24 feed back. Such infeed units are state of the art and are often constructed like an inverter in power electronics.

So it can be under 3 described kinetic energy as electrical energy in the feeding network 24 be fed back. This causes the braking resistor 31 and also the switch 30 can be designed accordingly smaller, as well as the necessary radiation area for the heat of the electric motor 2 ,

The proportions of the kinetic energy converted into heat via the braking resistor 31 and into the supply network 24 Regenerated energy can be influenced in relation to each other - preferably by the type of control of the supply unit 25 and the switch 30 ,

at If necessary, this can be made possible for the operator / operator, e.g. stating of recommendations or it is done independently by control means.

If necessary, the switch 30 and the braking resistor 31 to be completely dispensed with; the arrangement in 5 is then reduced by these two aforementioned components.

6 shows a correspondingly reduced arrangement of a frequency converter 23 ,

Even when using an energy recovery unit 25 in 5 and 6 and if necessary with the simultaneous use of switches 30 and braking resistor 31 can be used additionally or alternatively with direct current braking or counter current braking or short circuit braking. The proportions of the kinetic energy converted into heat via direct current braking or countercurrent braking or short-circuit braking and, if necessary, via the braking resistor 31 and into the supply network 29 Regenerative energy can be influenced in relation to each other - preferably by the type of control of the supply unit 25 and the inverter 28 and, if applicable, the switch 30 , If necessary, this can be made possible for the operator / operator, for example by giving recommendations or it can be done independently by control means.

1

drive unit

2

electric motor

2a

rotor

2 B

stator

3

Additional flywheel

4

Clutch-brake combination

4a

rotationally fixed part

4b

swivelable part

4c

swivelable part

5

mounting bell

6

enclosure

7

end shield

8th

medium

9

loom

10

connecting means

11

Main drive shaft

12

axis of rotation

13

frequency converter

14

feeding network

15

Supply

16

Voltage link

17

capacity

18

inverter

19

exchange or three-phase system

20

switch

21

braking resistor

23

frequency converter

24

feeding network

25

Supply

26

Voltage link

27

capacity

28

inverter

29

exchange or three-phase system

30

switch

31

braking resistor

Claims (30)

Drive unit for a weaving machine with a rotor ( 2a ) and stator ( 2 B ) existing electric motor ( 2 ), preferably with an additional flywheel ( 3 ) and with one made of non-rotating parts ( 4a ) and rotating parts ( 4b . 4c ) existing switchable clutch-brake combination ( 4 ) and a mounting bell (at least the non-rotatable parts (brake parts) of the clutch-brake combination) ( 5 ), the first end of which is via a housing ( 6 ) by connecting means ( 10 ) with the bearing plate facing the weaving machine ( 7 ) of the electric motor ( 2 ) and its second end by suitable means ( 8th ) rotatably on the weaving machine ( 9 ) is arranged. Drive unit according to claim 1, characterized in that the rotor ( 2a ) has such a diameter that at the same time the function of the additional flywheel mass ( 3 ) to take over. Drive unit according to claim 1, characterized in that the additional flywheel mass ( 3 ) integral part of the rotor ( 2a ) is. Drive unit according to claim 1, characterized in that the additional flywheel mass ( 3 ) as an additional component with the free end of the shaft of the rotor ( 2a ) connected is. Drive unit according to claim 1, characterized in that the additional flywheel mass ( 3 ) between electric motor ( 2 ) and clutch-brake combination ( 4 ) is arranged. Drive unit according to one of claims 1 to 5, characterized in that the additional flywheel mass ( 3 ) is completely or partially enclosed. Drive unit according to claim 1, characterized in that the electric motor ( 2 ) is an asynchronous motor with a squirrel-cage rotor. Drive unit according to claim 7, characterized in that the electric motor ( 2 ) can be switched. Drive unit according to claim 4, characterized in that the additional flywheel mass ( 3 ) as fan wheel of the electric motor ( 2 ) is trained. Drive unit according to claim 1, characterized in that the at least one electric motor ( 2 ) is operated with a power electronic actuator to change its speed. Drive unit according to claim 10, characterized in that the power electronic actuator is a frequency converter ( 13 ; 23 ) is. Drive unit according to claim 11, characterized in that the frequency converter is designed as a voltage intermediate circuit converter is. Drive unit according to claim 10, characterized in that the power electronic actuator is regenerative. Drive unit according to claims 12 and 13, characterized in that both infeed during motor operation of the drive unit ( 1 ) as well as regenerative power supply during generator operation of the drive unit ( 1 ) via an appropriately designed supply unit ( 15 ; 25 ) respectively. Drive unit according to claims 12 and 13, characterized in that the feed during motor operation of the drive unit ( 1 ) via a first supply unit and the regenerative power supply when the drive unit is in generator mode ( 1 ) takes place via a second unit designed as a regenerative unit. Weaving machine with shedding means, with a main drive shaft ( 11 ) and with at least one drive unit connected to the main drive shaft ( 1 ), the at least one variable in speed and direction of rotation, consisting of rotor ( 2a ) and stator ( 2 B ) existing electric motor ( 2 ), which elec motor with a frequency converter ( 13 ; 23 ) trained power electronic actuator is operated, wherein the frequency converter is a voltage intermediate circuit converter and wherein the power electronic actuator is capable of regenerative power supply, the weaving machine ( 9 ) one between the electric motor ( 2 ) and the main drive shaft ( 11 ) arranged, made of non-rotating parts ( 4a ) and rotating parts ( 4b . 4c ) existing switchable clutch-brake combination ( 4 ) and wherein the drive unit ( 1 ) preferably an additional flywheel ( 3 ), characterized in that the rotor ( 2a ) of the electric motor ( 2 ), the rotating parts ( 4b . 4c ) the clutch-brake combination ( 4 ), the main drive shaft ( 11 ) and the preferably available at least one additional flywheel mass ( 3 ) the same axis of rotation ( 12 ) own. Weaving machine according to claim 16, characterized in that the drive of the shedding means by the main drive shaft ( 11 ) is derived. Weaving machine according to claim 16, characterized in that the drive of the specialist training means by means of at least one of its own Actuator takes place. Weaving machine according to claim 16, characterized in that the actuator is electromechanical and preferably made of an electric motor. Loom combination, comprising n weaving machines with shedding means, each weaving machine ( 9 ) a main drive shaft ( 11 ), each weaving machine ( 9 ) at least one on the main drive shaft ( 11 ) acting drive unit ( 1 ) with a variable rotor and rotating direction ( 2a ) and stator ( 2 B ) existing electric motor ( 2 ) which electric motor ( 2 ) with one as an inverter ( 18 ; 28 ) trained power electronic actuator is operated, which is part of the drive unit ( 1 ), and further between the electric motor ( 2 ) and the main drive shaft ( 11 ) one made of non-rotating parts ( 4a ) and rotating parts ( 4b . 4c ) existing switchable clutch-brake combination ( 4 ) is arranged, characterized in that the inverters ( 18 ; 28 ) of the drive units ( 1 ) of n weaving machines, where n> 1, with a common electrical voltage intermediate circuit ( 16 ; 26 ) are connected and that for the drive units ( 1 ) of the n weaving machines a shared rectifier supply unit capable of regenerative power supply ( 15 ; 25 ) is present, which is connected to the electrical voltage intermediate circuit ( 16 . 26 ) connected is. Loom combination, comprising n weaving machines with shedding means, each weaving machine ( 9 ) a main drive shaft ( 11 ), each weaving machine ( 9 ) at least one on the main drive shaft ( 11 ) acting drive unit ( 1 ) with a variable rotor and rotating direction ( 2a ) and stator ( 2 B ) existing electric motor ( 2 ) which electric motor ( 2 ) with one as an inverter ( 18 ; 28 ) trained power electronic actuator is operated, which is part of the drive unit ( 1 ), and further between the electric motor ( 2 ) and the main drive shaft ( 11 ) one made of non-rotating parts ( 4a ) and rotating parts ( 4b . 4c ) existing switchable clutch-brake combination ( 4 ) is arranged, characterized in that the feed during motor operation of the drive unit ( 1 ) takes place via a first supply unit, which is connected to an electrical voltage intermediate circuit, and the power recovery when the drive unit is in generator mode ( 1 ) takes place via a second unit designed as a regenerative unit, which is also connected to the electrical voltage intermediate circuit. Loom combination according to one of claims 20 or 21, characterized in that at least one braking resistor is present, which is designed so that only the simultaneous Stopping braking of m weaving machines from maximum operating speed possible out where m is 1 and m <n is. Loom combination according to claim 20 or 21, characterized in that the drive of the shedding means by the main drive shaft ( 11 ) is derived. Loom combination according to claim 20 or 21, characterized characterized in that the drive of the shedding means by at least of its own actuator. Weaving machine network according to claim 24, characterized in that that the actuator is electromechanical and preferably made of an electric motor. Loom combination, comprising n weaving machines with shedding means, each weaving machine ( 9 ) a main drive shaft ( 11 ), each weaving machine ( 9 ) at least one on the main drive shaft ( 11 ) acting drive unit ( 1 ) with a variable rotor and rotating direction ( 2a ) and stator ( 2 B ) existing electric motor ( 2 ) which electric motor ( 2 ) is operated with a power electronic actuator designed as an inverter, which is part of the drive unit ( 1 ), and further between the electric motor ( 2 ) and the main drive shaft ( 1 ) one made of non-rotating parts ( 4a ) and rotating parts ( 4b . 4c ) existing switchable clutch-brake combination ( 4 ) arranged is characterized in that the inverters of the drive units ( 1 ) of n weaving machines, where n> 1, are connected to a common electrical voltage intermediate circuit and that for the drive units ( 1 ) the n weaving machine has a shared braking resistor which is connected to the electrical voltage intermediate circuit by suitable means. Loom combination according to claim 26, characterized in that that there is at least one braking resistor that is designed in this way is that only the simultaneous stopping braking of m weaving machines is possible from the maximum operating speed, where m ≧ 1 and m <n. Weaving machine network according to claim 26, characterized in that the drive of the shedding means by the main drive shaft ( 11 ) is derived. Loom combination according to claim 26, characterized in that that the drive of the specialist training means by means of at least one of its own Actuator takes place. Weaving machine network according to claim 29, characterized in that that the actuator is electromechanical and preferably made of an electric motor.