Method and device for transportation

Patent metadata

Field	Value
Publication number	US-11208273-B2
Application number	US-202016933051-A
Country	US
Kind code	B2
Filing date	Jul 20, 2020
Priority date	Jul 18, 2019
Publication date	Dec 28, 2021
Grant date	Dec 28, 2021

Abstract

A device and a plurality of methods for transporting are disclosed. One method includes moving a plurality of transport movement devices (14) along a guide track (22) by use of a linear motor system. A long stator (16) of the linear motor system has, along a portion of the guide track (22), a predetermined functional region. The method includes portion-wise varying of a magnetic field generation of the long stator (16) within the predetermined functional region (46) for successive transport movement devices of the plurality of transport movement devices (14). It is thus possible to achieve various advantages, such as for example prolonging the motor service life, preventing emergency shut-offs, increased performance of the long stator linear motor and/or allowing smaller dimensioning of the long stator (16).

First claim

What is claimed is:

1. A method for transporting objects, comprising:
moving a plurality of transport movement devices along a guide track using a linear motor system, wherein a long stator of the linear motor system has, along a portion of the guide track, a predetermined functional region in which a function assigned to the predetermined functional region is carried out with respect to influencing the plurality of transport movement devices, and
portion-wise varying of a magnetic field generation of the long stator within the predetermined functional region for successive transport movement devices of the plurality of transport movement devices, wherein thermal loading of the long stator within the predetermined functional region is reduce at least portion-wise.

2. The method according to claim 1 , wherein:
the predetermined functional region is a predetermined acceleration region in which the plurality of transport movement devices are accelerated positively or negatively; or
the predetermined functional region is a predetermined speed-maintaining region in which one speed of the plurality of transport movement devices is substantially maintained.

3. The method according to claim 1 , wherein:
the magnetic field generation is varied portion-wise in such a way that the function assigned to the predetermined functional region is maintained; and/or
the magnetic field generation is varied portion-wise in such a way that a thermal loading of the long stator within the predetermined function region is distributed substantially uniformly and/or between different portions of the predetermined functional region.

4. The method according to claim 1 , wherein the predetermined functional region has a plurality of portions, and the magnetic field generation is varied portion-wise in such a way that at least one of the following features is satisfied:
a temperature, a power output, a heat generation and/or a thermal loading of the long stator in the plurality of portions in each case remains below a limit value;
the temperature, the power output, the heat generation and/or the thermal loading of the long stator in the plurality of portions is at least partially evened out;
the plurality of portions, in each case alternately, undertake the largest magnetic field generation and/or the smallest magnetic field generation;
the plurality of portions, in each case alternately, have the largest power output and/or the smallest power output;
a variation of the magnetic field generation in the plurality of portions migrates, rolls and/or occurs alternately successively in a direction towards an end of the predetermined functional region and in a direction towards a start of the predetermined functional region; and
the variation of the magnetic field generation in the plurality of portions occurs in a predetermined order.

5. The method according to claim 1 , wherein a speed of the plurality of transport movement devices at a start of the predetermined functional region is substantially identical and/or a speed of the plurality of transport movement devices at an end of the predetermined functional region is substantially identical.

6. The method according to claim 1 , wherein the magnetic field generation is varied portion-wise in such a way that:
the successive transport movement devices are accelerated in each case different portions of the predetermined functional region; and/or
the successive transport movement devices experience in each case their strongest acceleration in different portions of the predetermined functional region; and/or
the successive transport movement devices have at least partially different, path-related acceleration profiles in the predetermined functional region.

7. The method according to claim 1 , wherein:
the predetermined functional region is formed by a plurality of successive long stator segments of the long stator, and each long stator segment forms a respective portion of the predetermined functional region; and/or
the predetermined functional region is a predetermined functional region common to the plurality of transport movement devices; and/or
the predetermined functional region has a predetermined start, a predetermined end, a predetermined position, a predetermined length and/or a predetermined course.

8. The method according to claim 1 , wherein the predetermined functional region is a predetermined acceleration region in which the plurality of transport movement devices are accelerated positively.

9. A method for transporting objects, comprising:
moving at least one transport movement device along a guide track using a linear motor system, wherein the at least one transport movement device has a short stator, which is subdivided into a plurality of portions, of the linear motor system; and
portion-wise varying of a magnetic field generation over the plurality of portions of the short stator in successive time intervals for carrying out an identical function with respect to moving the at least one transport movement device, wherein the thermal loading of the short stator is reduce at least portion-wise by the portion-wise varying of the magnetic field generation.

10. The method according to claim 9 , wherein the identical function is an acceleration function or a speed-maintaining function.

11. The method according to claim 9 , wherein the plurality of portions of the short stator can be or are energized independently of one another.

12. The method according to claim 9 , wherein the plurality of portions have a first portion and a second portion, and:
the portion-wise varying of the magnetic field generation occurs in such a way that, in successive time intervals for carrying out the identical function, initially the first portion is activated and the second portion is deactivated and subsequently the first portion is deactivated and the second portion is activated; and/or
the portion-wise varying of the magnetic field generation occurs in such a way that, in successive time intervals for carrying out the identical function, initially the first portion is more strongly energized than the second portion and subsequently the second portion is more strongly energized than the first portion.

13. The method according to claim 9 , wherein the magnetic field generation is varied portion-wise in such a way that at least one of the following features is satisfied:
a thermal loading of the short stator is distributed over the plurality of portions;
a temperature, a power output, a heat generation and/or a thermal loading of the short stator in the plurality of portions in each case remains below a limit value;
the temperature, the power output, the heat generation and/or the thermal loading of the short stator in the plurality of portions is at least partially evened out;
the plurality of portions, in each case alternately, undertake the largest magnetic field generation and/or the smallest magnetic field generation;
the plurality of portions, in each case alternately, have the largest power output and/or the smallest power output;
the variation of the magnetic field generation in the plurality of portions migrates;
the variation of the magnetic field generation in the plurality of portions occurs in a predetermined order; and
a thermal overloading of a portion or of all portions of the short stator is delayed or ruled out.

14. A device for transporting objects, comprising:
a guide track;
at least one transport movement device which can be guided along the guide track;
a linear motor system having:
a long stator which is arranged along the guide track and is designed for driving the a

Assignees

• Krones Ag

Inventors

• Neubauer Michael

Classifications

• B65G43/08

  Control devices operated by article or material being fed, conveyed or discharged {(and controlling the discharging devices B65G47/42)} · CPC title

• H02P1/00

  Arrangements for starting electric motors or dynamo-electric converters (starting of synchronous motors with electronic commutators H02P6/20, H02P6/22; starting dynamo-electric motors rotating step by step H02P8/04; vector control H02P21/00) · CPC title

• B65G54/02 Primary

  electrostatic, electric, or magnetic · CPC title

• B65G2203/0291

  Speed of the load carrier · CPC title

• H02P25/06

  Linear motors · CPC title