Title:
TRANSFORMER INCLUDING A CONTACTLESS SIGNAL CONNECTION
Document Type and Number:
WIPO Patent Application WO/2013/000726
Kind Code:
A1
Abstract:
An improved transformer (130) for use in a power tool (100) is disclosed, where the power tool (100) comprises a stationary body (110) and a shaft (120) being movable in relation to said body (110). The transformer (130) comprises a stator (210) being fixed in relation to said body (110) and including one or more stator windings (216). The transformer (130) also comprises a rotor (220) being movable with said shaft and including one or more rotor windings (226). A magnetic field B is shared by said one or more stator and rotor windings (216, 226) and is used for creating a contactless signal connection between said body and at least one sensor of said shaft. According to the present invention, the stator (210) and the rotor (220) are arranged for forming a mutual geometrical relationship such that said contactless signal connection is provided for different positions in both an axial direction A and a rotational direction R of said shaft.
Inventors:
CARLIN CARL-GUSTAF (SE)
Application Number:
PCT/EP2012/061320
Publication Date:
January 03, 2013
Filing Date:
June 14, 2012
Export Citation:
Assignee:
ATLAS COPCO IND TECH AB (SE)
CARLIN CARL-GUSTAF (SE)
CARLIN CARL-GUSTAF (SE)
International Classes:
H01F38/18; B25B23/14
Foreign References:
| JP2010184329A | 2010-08-26 | |||
| DE4025430A1 | 1992-02-13 | |||
| US4846001A | 1989-07-11 | |||
| DE1920890A1 | 1970-11-12 | |||
| EP0502748A1 | 1992-09-09 |
Attorney, Agent or Firm:
EKEBERG, Lars (Patent Department, Stockholm, SE)
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