Method for the wireless and contactless transport of energy and data, and corresponding device

• US 20050225188A1
• Filed: 08/27/2003
• Published: 10/13/2005
• Est. Priority Date: 08/30/2002
• Status: Active Grant

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Griepentrog, Gerd, Pohl, Andreas, Maier, Reinhard
• Granted Patent: US 7,432,622 B2
• Time in Patent Office: Days
• US Class Current: 310/112
• CPC Class Codes: H01F 38/18 Rotary transformers

Abstract

In installations including fixed and mobile structural elements and a rotary current motor as a drive, the rotary current motor can be used for the wireless transmission of both energy and/or data. The transmission from the fixed structural elements to the mobile structural elements of the rotary current motor is especially inductive. In the corresponding device including a rotary current motor including a stator and a secondary element, the secondary element is not embodied as a solid conductor with or without a laminated core, according to prior art, but rather as a laminated core including integrated windings which is the same as, or similar to, the stator.

Claims

1. A method for wireless and non-contacting power and information transport in systems which include fixed and moving structural parts and a three-phase motor as a drive for the moving structural parts, comprising:

using the three-phase motor in the same way for wireless transmission of power and information; and

supplying devices, arranged on the moving structural parts of the system, with at least one of power and information.

2. The method as claimed in claim 1, wherein the three-phase motor includes a stator and a secondary part, and wherein the power is transmitted via the inductive coupling between the stator of the three-phase motor and the secondary part of the three-phase motor.

3. The method as claimed in claim 2, wherein a slip, present between the stator and the secondary part, is used to transmit power from the stator of the three-phase motor to the secondary part of the three-phase motor.

4. The method as claimed in claim 2, wherein an alternating current, whose frequency is higher than the fundamental, and is preferably three times the power supply system frequency, is applied to the stator, in order to transmit power from the stator of the three-phase motor to the secondary part of the three-phase motor.

5. The method as claimed in claim 1, wherein the information is transmitted via inductive coupling between the stator part and the secondary part, with the data being modulated and being transmitted in the form of signals at a considerably higher frequency than the power supply system frequency.

20. The method as claimed in claim 2, wherein an alternating current, whose frequency is three times the power supply system frequency, is applied to the stator, in order to transmit power from the stator of the three-phase motor to the secondary part of the three-phase motor.

21. An apparatus for carrying out the method of claim 1, comprising:

the three-phase motor, including a stator and a secondary part, wherein the stator and the secondary part respectively have three-phase windings with the same number of pole pairs and with the same pole pitch.

6. An apparatus, comprising:

a three-phase motor which includes a stator and a secondary part, wherein the stator and the secondary part respectively have three-phase windings with the same number of pole pairs and with the same pole pitch.

7. The apparatus as claimed in claim 6, wherein the three-phase motor is a linear motor.

8. The apparatus as claimed in claim 6, wherein the three-phase motor is a rotating motor.

9. The apparatus as claimed in claim 6, wherein the windings of the stator are connected to at least one of the three-phase power supply system and to an associated motor controller, with the windings of the secondary part being connected in star or delta.

10. The apparatus as claimed in claim 9, wherein the motor controller is a frequency converter.

11. The apparatus as claimed in claim 10, wherein the free ends of the windings of the secondary part are connected to a 6-pulse rectifier if connected in star, and the nodes of the windings of the secondary par are connected to a 6-pulse rectifier if connected in delta.

12. The apparatus as claimed in claim 6, wherein an energy storage element whose energy storage state is controllable is provided for power transmission.

13. The apparatus as claimed in claim 12, wherein the energy storage element is a capacitor.

14. The apparatus as claimed in claim 6, wherein the voltage across the energy storage element kept virtually constant via a controllable switch, independently of the power drawn and of the speed of the secondary part.

15. The apparatus as claimed in claim 6, wherein a coding device is provided for transmission of data as information.

16. The apparatus as claimed in claim 15, wherein a control device enables the coding device to transmit message telegrams.

17. The apparatus as claimed in claim 6, wherein at least one coupling unit is provided.

18. The apparatus as claimed in claim 16, wherein the coupling unit includes a high-frequency transformer with four windings, and three coupling capacitors.

19. The apparatus as claimed in claim 7, wherein at least one transport vehicle is provided above the stator of the linear motor,

and wherein sensors are provided, by which the location of the vehicle above the stator is detectable.

22. The apparatus as claimed in claim 12, wherein the energy storage element is a at least one of a so-called supercap and a rechargeable battery.

23. An apparatus, comprising:

a three-phase motor, including a stator and a secondary part, wherein the stator and the secondary part respectively have three-phase windings with the same number of pole pairs and with the same pole pitch, and wherein the three-phase motor is useable in the same way for wireless transmission of power and information.

24. The apparatus as claimed in claim 23, wherein the three-phase motor is useable as a drive for moving structural parts and for supplying devices, arranged on the moving structural parts, with at least one of power and information.