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

• US 7,432,622 B2
• Filed: 08/27/2003
• Issued: 10/07/2008
• Est. Priority Date: 08/30/2002
• Status: Expired due to Fees

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Griepentrog, Gerd, Maier, Reinhard, Pohl, Andreas
• Primary Examiner(s): Tamai; Karl I
• Application Number:
  US10/525,825
• Publication Number:
  US 20050225188A1
• Time in Patent Office: 1,868 Days
• Field of Search: 310/112, 310/12, 310/179, 310/180, 322/100, 307/104, 336/118, 336/120, 363/144, 104/290, 104/292
• 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, comprising:

supplying a three-phase motor including a stator with three-phase windings and a secondary part with three-phrase windings as a drive for the moving structural parts, wherein

the three-phase windings of the stator and the three-phase windings of the secondary part are connected in a star-shaped configuration with an accessible star point, and wherein

the secondary part includes a four-pulse rectifier;

using a fundamental current for driving the three-phase motor;

using a neutral current for the transmission of at least one of power and information via the inductive coupling between the stator and the secondary part, wherein

the neutral current is three times the power supply frequency and has the same phase angle in all windings so as to induce a non-traveling time-variable field, and wherein

the star point is connected so as to allow the return flow of the neutral current; 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 information transmitted via inductive coupling between the stator part and the secondary part is data being modulated and being transmitted in the form of signals.

3. 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.