Magnetic track system for a transport device, and transport device

Patent metadata

Field	Value
Publication number	US-9669730-B2
Application number	US-201514657575-A
Country	US
Kind code	B2
Filing date	Mar 13, 2015
Priority date	Apr 8, 2014
Publication date	Jun 6, 2017
Grant date	Jun 6, 2017

Abstract

A magnetic track system for a transport device for moving a rotor along the magnetic track system includes a plurality of linear sections having an even number of magnets of alternating polarity, which are disposed on a support in each case, the magnetic orientation of the magnets reversing itself at regular intervals across abutting sections n the linear regions of the magnetic track system. In the curved regions of the magnetic track system, on the other hand, the polarity of two adjacent magnets of different sections is the same.

First claim

What is claimed is:

1. A magnetic track system for a transport device for moving a rotor along the magnetic track system, comprising:
a plurality of linear sections, each section having an even number of magnets of alternating polarity arranged on a support, the polarity of adjacent magnets reversing itself at regular intervals across abutting sections in linear regions of the magnetic track system, the polarity of two adjacent magnets of different sections being the same in curved regions of the magnetic track system;
wherein the sections are positioned in steps of k*p on the magnetic track system in linear regions of the magnetic track system, and the sections are positioned in steps of p*(k+1) on the magnetic track system in curved regions of the circular path, k representing the number of magnets of a section and p represents a pole pitch of the magnets.

2. The magnetic track system according to claim 1 , wherein the magnetic track system includes a plurality of identical linear sections.

3. The magnetic track system according to claim 1 , wherein the relationship:
R =( p *( n *( k+ 1)+1))/α

is satisfied for a curved region of the magnetic track system, R representing a radius of curvature of the magnetic track system in the curved region, α representing an angle enclosing the curved region, k representing the number of magnets of a section, p representing a pole pitch of the magnets, and n representing the number of sections in the curved region.

4. A transport device, comprising:
a linear drive including:
a magnetic track system arranged as a secondary part of the linear drive, the magnetic track system including a plurality of linear sections, each section having an even number of magnets of alternating polarity arranged on a support, the polarity of adjacent magnets reversing itself at regular intervals across abutting sections in linear regions of the magnetic track system, the polarity of two adjacent magnets of different sections being the same in curved regions of the magnetic track system; and
a rotor including a primary part of the linear drive oriented toward the magnetic track system;

wherein the sections are positioned in steps of k*p on the magnetic track system in linear regions of the magnetic track system, and the sections are positioned in steps of p*(k+1) on the magnetic track system in curved regions of the circular path, k representing the number of magnets of a section and p represents a pole pitch of the magnets.

5. The transport device according to claim 4 , wherein the magnetic track system includes a plurality of identical linear sections.

6. The transport device according to claim 4 , wherein the relationship:
R =( p *( n *( k+ 1)+1))/α

is satisfied for a curved region of the magnetic track system, R representing a radius of curvature of the magnetic track system in the curved region, α representing an angle enclosing the curved region, k representing the number of magnets of a section, p representing a pole pitch of the magnets, and n representing the number of sections in the curved region.

Assignees

• Etel Sa

Inventors

• Coleman Ralph
• Mottier Samuel

Classifications

• H02K41/031 Primary

  of the permanent magnet type · CPC title

• H02K2213/12

  Machines characterised by the modularity of some components · CPC title

• B65G45/02

  Lubricating devices · CPC title

• B60L13/04 Primary

  Magnetic suspension or levitation for vehicles · CPC title

• B65G54/02

  electrostatic, electric, or magnetic · CPC title