Magnet switch for a transport system

Patent metadata

Field	Value
Publication number	US-10974909-B2
Application number	US-201816614616-A
Country	US
Kind code	B2
Filing date	May 3, 2018
Priority date	May 18, 2017
Publication date	Apr 13, 2021
Grant date	Apr 13, 2021

Abstract

A switch of a transport system for a movable transport element includes a main track and a secondary track branching off the main track. The movable transport element can be guided from a transition region in which the secondary track branches off from the main track. Devices for increasing a switching force to guide a moveable transport element along the main track or transfer the movable transport element to the secondary track are provided in the transition region.

First claim

The invention claimed is:

1. A switch of a transport system for a movable transport element, comprising:
a main track;
a secondary track; and
a transition region, the transition region comprising:
a section of the main track, the section of the main track comprising a first linear motor section, the first linear motor section configured to move the movable transport element along the main track; and
a section of the secondary track branching off from the main track, the section of the secondary track comprising a second linear motor section, the second linear motor section configured to move the movable transport element along the secondary track,
wherein the first and second linear motor sections are configured to generate switching forces to guide the movable transport element through the transition region onto the main track or to switch the movable transport element to the secondary track,
wherein a switching force generated by the first linear motor section differs from the switching force generated by the second linear motor section, and
wherein the first linear motor section is configured to carry a larger current than linear motor sections outside of the transition region, and wherein the second linear motor section is configured to carry a larger current than linear motor sections outside of the transition region.

2. The switch of claim 1 , wherein switching forces generated by the first linear motor section and second linear motor section correspond to strengths of magnetic fields produced by the first linear motor section and the second linear motor section.

3. The switch of claim 1 , wherein:
the movable transport element comprises passive magnetic elements,
wherein the first linear motor section comprises wound stators having a greater number of turns than stators outside of the transition region, and
wherein the second linear motor section comprises wound stators having a greater number of turns than stators outside of the transition region.

4. The switch of claim 1 , wherein in the transition region comprises at least one of cooling fins, water cooling, or a cooling fan is provided.

5. The switch of claim 1 ,
wherein the first linear motor section comprises a first stator with a first set of coils,
wherein the second linear motor section comprises a second stator with a second set of coils, and
further comprising actuatable coils in the transition region, the actuatable coils configured to increase switching forces generated by the first linear motor section and the second linear motor section.

6. The switch of claim 5 , wherein the actuatable coils, first linear motor section and second linear motor section are coplanar.

7. The switch of claim 5 , wherein the actuatable coils are disposed in a separate plane from at least one of the first linear motor section or second linear motor section.

8. A movable transport element for a transport system, comprising:
a chassis;
one or more magnetic reaction elements;
two independently switchable electromagnets; and
one or more magnetically conductive passive components,
wherein the magnetically conductive passive components are configured to interact with actuatable coils of linear motor sections in a transition region to increase a switching force exerted upon the movable transport element.

9. A transport system for a movable transport element, comprising:
a transport track; and
a switch connected to the transport track, the switch comprising:
a main track;
a secondary track; and
a transition region, the transition region comprising:
a section of the main track, the section of the main track comprising a first linear motor section, the first linear motor section configured to move the movable transport element along the main track; and
a section of the secondary track branching off from the main track, the section of the secondary track comprising a second linear motor section, the second linear motor section configured to move the movable transport element along the secondary track,
wherein the first and second linear motor sections are configured to generate switching forces to guide the movable transport element through the transition region onto the main track or to switch the movable transport element to the secondary track,
wherein the switching force generated by the first linear motor section differs from the switching force generated by the second linear motor section, and
wherein the first linear motor section is configured to carry a larger current than linear motor sections outside of the transition region, and wherein the second linear motor section is configured to carry a larger current than linear motor sections outside of the transition region.

10. The transport system of claim 9 , further comprising:
a first movable transport element, the first movable transport element comprising:
a chassis;
one or more magnetic reaction elements; and
one or more magnetically conductive passive components,
wherein the magnetically conductive passive components are configured to interact with actuatable coils of linear motor sections in the transition region to increase a switching force exerted upon the first movable transport element.

Assignees

• Krones Ag

Inventors

• Davidson Hartmut
• Kiendl Thomas
• Poeschl Stefan
• Neubauer Michael
• Kammerl Martin

Classifications

• H02P25/06

  Linear motors · CPC title

• B60L13/03

  Electric propulsion by linear motors · CPC title

• B65G54/02

  electrostatic, electric, or magnetic · CPC title

• E01B25/00

  Tracks for special kinds of railways (systems B61B; wheel tracks on roads E01C9/02) · CPC title

• B65G47/64 Primary

  Switching conveyors · CPC title