Planar drive system

Patent metadata

Field	Value
Publication number	US-12289022-B2
Application number	US-202217988069-A
Country	US
Kind code	B2
Filing date	Nov 16, 2022
Priority date	May 26, 2020
Publication date	Apr 29, 2025
Grant date	Apr 29, 2025

Abstract

A planar drive system comprises a stator and a rotor. The stator comprises a plurality of energizable stator conductors. The rotor comprises a magnet device having at least one rotor magnet. A magnetic interaction can be produced between energized stator conductors of the stator and the magnet device in order to drive the rotor. The stator is configured to carry out energization of the stator conductors so that an alternating magnetic field can be generated via the energized stator conductors. The rotor comprises at least one rotor coil in which an alternating voltage can be induced due to the alternating magnetic field. The planar drive system is configured to transmit data from the rotor to the stator, and the rotor is configured to temporarily load the at least one rotor coil to temporarily cause increased current consumption of the energized stator conductors of the stator.

First claim

The invention claimed is:

1. A planar drive system comprising:
a stator, and
a rotor;
wherein the stator comprises a plurality of energizable stator conductors,
wherein the rotor comprises a magnet device having at least one rotor magnet,
wherein a magnetic interaction is producible between energized stator conductors of the stator and the magnet device of the rotor in order to drive the rotor,
wherein the stator is configured to carry out energization of the energizable stator conductors such that an alternating magnetic field is generated via the energized stator conductors,
wherein the rotor comprises at least one rotor coil in which an alternating voltage is inducible due to the alternating magnetic field, and
wherein the planar drive system is configured to transmit data from the rotor to the stator, in that the rotor is configured to temporarily load the at least one rotor coil in order to thereby temporarily cause an increased current consumption of the energized stator conductors of the stator.

2. The planar drive system according to claim 1 , wherein the rotor is configured to short-circuit a coil portion of the at least one rotor coil for temporarily loading the at least one rotor coil.

3. The planar drive system according to claim 2 , wherein the coil portion used for short-circuiting is a lowermost coil portion of the at least one rotor coil.

4. The planar drive system according to claim 2 , wherein a larger conductor cross-section is present in the coil portion used for short-circuiting than in another coil portion of the at least one rotor coil.

5. The planar drive system according to claim 1 , wherein the rotor comprises a controller for controlling the temporary loading of the at least one rotor coil.

6. The planar drive system according to claim 1 , wherein the rotor is configured to perform the temporary loading of the at least one rotor coil in modulated form.

7. The planar drive system according to claim 1 , wherein the rotor comprises a rectifier for converting the inducible alternating voltage into a direct voltage.

8. The planar drive system according to claim 1 , wherein the stator comprises a summation current measuring device for measuring a summation current of the energized stator conductors.

9. The planar drive system according to claim 8 , wherein the stator comprises a bandpass filter for filtering the summation current.

10. The planar drive system according to claim 8 , wherein the stator comprises an evaluation device for evaluating the summation current.

11. The planar drive system according to claim 1 , wherein the stator is configured to perform the energization of the energizable stator conductors by a current control based on a pulse-width modulation.

12. The planar drive system according to claim 1 , wherein the planar drive system is configured to transmit data from the stator to the rotor, in that the stator is configured to temporarily influence the energization of the energizable stator conductors in order to thereby temporarily cause a change with respect to the alternating voltage which is inducible in the at least one rotor coil of the rotor.

13. A planar drive system comprising:
a stator, and
a rotor;
wherein the stator comprises a plurality of energizable stator conductors,
wherein the rotor comprises a magnet device having at least one rotor magnet,
wherein a magnetic interaction is producible between energized stator conductors of the stator and the magnet device of the rotor in order to drive the rotor,
wherein the stator is configured to carry out energization of the energizable stator conductors such that an alternating magnetic field is generated via the energized stator conductors,
wherein the rotor comprises at least one rotor coil in which an alternating voltage is inducible due to the alternating magnetic field,
wherein the planar drive system is configured to transmit data from the rotor to the stator, in that the rotor is configured to temporarily load the at least one rotor coil in order to thereby temporarily cause an increased current consumption of the energized stator conductors of the stator, and
wherein the rotor is configured to short-circuit a coil portion of the at least one rotor coil for temporarily loading the at least one rotor coil.

14. The planar drive system according to claim 13 , wherein the rotor comprises a load resistor via which the coil portion of the at least one rotor coil is short-circuited.

15. The planar drive system according to claim 13 , wherein the coil portion used for short-circuiting is a lowermost coil portion of the at least one rotor coil, which in operation of the planar drive system has a smaller distance to the energizable stator conductors of the stator than another coil portion of the at least one rotor coil.

16. A planar drive system comprising:
a stator, and
a rotor;
wherein the stator comprises a plurality of energizable stator conductors,
wherein the rotor comprises a magnet device having at least one rotor magnet,
wherein a magnetic interaction is producible between energized stator conductors of the stator and the magnet device of the rotor in order to drive the rotor,
wherein the stator is configured to carry out energization of the energizable stator conductors such that an alternating magnetic field is generated via the energized stator conductors,
wherein the rotor comprises at least one rotor coil in which an alternating voltage is inducible due to the alternating magnetic field,
wherein the planar drive system is configured to transmit data from the rotor to the stator, in that the rotor is configured to temporarily load the at least one rotor coil in order to thereby temporarily cause an increased current consumption of the energized stator conductors of the stator, and
wherein the at least one rotor coil is configured as a wound wire which is arranged in a region laterally surrounding the magnet device.

17. The planar drive system according to claim 16 , wherein the at least one rotor coil comprises a first coil portion and a second coil portion formed by different windings of the rotor coil, and the rotor is configured to short-circuit only the second coil portion of the at least one rotor coil for temporarily loading the at least one rotor coil.

Assignees

• Beckhoff Automation Gmbh

Inventors

• Bentfeld Lukas
• Brinkmann Rolf
• Jebramcik Patrick
• Kaulmann Tim

Classifications

• H02P27/08

  with pulse width modulation · CPC title

• H02K2201/18

  Machines moving with multiple degrees of freedom · CPC title

• H02K47/04

  Motor/generators · CPC title

• H02K41/03

  Synchronous motors; Motors moving step by step; Reluctance motors (H02K41/035 takes precedence) · CPC title

• H02P25/064

  of the synchronous type · CPC title