Classifications

• • D—TEXTILES; PAPER
  • D03—WEAVING
  • D03J—AUXILIARY WEAVING APPARATUS; WEAVERS' TOOLS; SHUTTLES
  • D03J1/00—Auxiliary apparatus combined with or associated with looms
  • D03J1/006—Controlling a group of looms
• • D—TEXTILES; PAPER
  • D03—WEAVING
  • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
  • D03D51/00—Driving, starting, or stopping arrangements; Automatic stop motions
  • D03D51/02—General arrangements of driving mechanism

Definitions

• the invention relates to an energetic loom group comprising n weaving machines with shedding means, wherein each weaving machine has a main drive shaft, each weaving machine has at least one acting on the main drive shaft drive unit with a variable speed and direction, consisting of rotor and stator electric motor, which electric motor with a as an inverter formed power electronic actuator is operated, which is part of the drive unit, and wherein further between the electric motor and the main drive shaft consisting of a non-rotatable and rotatable parts, electromagnetic switchable clutch-brake combination is arranged and wherein the drive unit preferably has an additional flywheel ,
• the object of the invention is to keep the cost of power electronic means for operating looms in an energetic loom group low.
• the supply of electrical energy during motor operation of the drive unit according to the invention takes place in that a first feed unit is present, which is connected to an electrical voltage intermediate circuit.
• the regenerative power supply takes place in generator operation of the drive unit according to the invention in that there is a second feed-in unit designed as a regenerative unit, which is likewise connected to the electrical voltage intermediate circuit.
• the invention provides that the inverters of the drive units of n looms, where n> 1, are connected to a common electrical voltage intermediate circuit and that for the Drive units of n looms a shared electrical braking resistor is present, which is connected via suitable means to the electrical voltage intermediate circuit.
• the at least one regenerative unit or the at least one electrical braking resistor can be designed so that the simultaneous stopping braking of several looms out of maximum operating speed is possible.
• Figure 1 is a schematic representation of a known frequency converter in
• Figure 2 is a schematic representation of a known frequency converter in
• Figure 3 is a schematic representation of a known frequency converter in
• Figure 4 is a schematic representation of a known frequency converter in
• FIG. 1 shows a simplified or schematic representation of a known from the prior art frequency converter 1 for the electric motor 2 of the drive unit, not shown, of an operable in an energetic weaving machine loom loom.
• the frequency converter 1 associated feed unit 4 converts the mains voltage into a voltage with a generally high DC voltage component.
• the feed unit 4 is not able to feed back electrical energy from the voltage intermediate circuit 5 into the supply network 3 in this exemplary embodiment.
• Such a non-regenerative feed unit is often performed in the art as a so-called uncontrolled B6 bridge.
• the inverter 7 converts the voltage from the voltage intermediate circuit 5 back to an alternating or rotary voltage; i.e.
• an AC or three-phase system 8 which can differ from the feeding network 3, especially in rms voltage, frequency, phase angle and strand number.
• FIG. 1 for example, it is a three-phase three-phase system 8.
• the feed unit 4 can not pass this energy to the feeding network 3 and the capacity 6 can absorb this energy only to a certain extent, since otherwise the voltage in the voltage intermediate circuit 5 becomes unacceptably high.
• a switch 9 often referred to in the art as a chopper or brake chopper, this energy is instead supplied to the at least one electrical braking resistor 10, which converts it into heat.
• the lengths of switch-on and switch-off times of the switch 9 are determined taking into account the level of the voltage in the voltage intermediate circuit 5.
• the kinetic energy of the engine 2 itself and possibly present at least one flywheel is very high. With frequent braking arises in the braking resistor 10 correspondingly much heat.
• the braking resistor 10 must therefore be made correspondingly large in order to be able to radiate the heat to the environment. That that e.g. a control cabinet, in which the braking resistor 10 is installed, must be correspondingly large and / or costly to be cooled.
• DC braking or countercurrent braking or short-circuit braking of the electric motor 2 is to be carried out, which except the electric motor 2, the optionally present at least one flywheel, the co-rotating parts of a clutch-brake combination, if necessary Weaving machine and optionally further components decelerates accordingly.
• the procedures for DC braking, for countercurrent braking and for short-circuit braking itself are adequately described in the prior art. They cause the kinetic energy is significantly converted into engine heat.
• the braking resistor 10 and also the switch 9 can be designed correspondingly smaller, as well as the necessary radiating surface for the cabinet heat.
• the proportions of the kinetic energy converted via heat via the braking resistor 10 and via a DC braking or counter-current braking or short-circuit braking can be influenced in relation to each other - preferably by the type of driving of the inverter 7 and the switch 9. If necessary, this allows the operator / operator be, for example giving recommendations or it is done independently by means of taxation. Optionally, can be completely dispensed with the switch 9 and the braking resistor 10. The arrangement acc. FIG. 1 then reduces around the switch 9 and the braking resistor 10.
• FIG. 2 shows a correspondingly reduced arrangement of a frequency converter 1.
• the feed unit 11 has the same task as the feed unit 4 in Figure 1, but in contrast to the feed unit 4 in Figure 1 also able to feed back energy from the voltage intermediate circuit 12 in the feeding network 13.
• Such supply units are state of the art and in power electronics often constructed like an inverter.
• Braking resistor 14 and the switch 15 can be designed correspondingly smaller, as well as the necessary radiating surface for the heat of the control cabinet.
• Proportions of the kinetic energy converted in heat via the braking resistor 14 and the energy fed back into the supply network 13 can be influenced in relation to one another - preferably by the type of activation of the
• FIG. 4 shows a correspondingly reduced arrangement of a frequency converter 17.

Landscapes

• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Looms (AREA)
• Stopping Of Electric Motors (AREA)
• Preliminary Treatment Of Fibers (AREA)
• Replacement Of Web Rolls (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=34979415

Family Applications (2)

Family Applications After (1)

Country Status (4)

Families Citing this family (2)

Family Cites Families (6)

• 2004
  • 2004-07-15 DE DE102004063925A patent/DE102004063925B4/de not_active Expired - Fee Related
• 2005
  • 2005-06-24 WO PCT/DE2005/001132 patent/WO2006005294A1/fr active Application Filing
  • 2005-06-24 WO PCT/DE2005/001133 patent/WO2006005295A1/fr active Application Filing
  • 2005-06-24 DE DE502005009278T patent/DE502005009278D1/de active Active
  • 2005-06-24 EP EP05760080A patent/EP1766120A1/fr not_active Withdrawn
  • 2005-06-24 EP EP05760076A patent/EP1766119B1/fr not_active Not-in-force
  • 2005-06-24 AT AT05760076T patent/ATE462034T1/de not_active IP Right Cessation

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events