Patent ID: 6995485
Filing Date: 2006-02-07
Classification: H01F,H02K

Abstract:
1. A rotation transmitter for rotor-excited electrical machines, in particular for synchronous generators in motor vehicles, with a primary part ( 14 ) mat has a primary core ( 17 ) comprised of a magnetically conductive material that has a primary winding ( 18 ) inserted into it, and with a coaxial secondary part ( 15 ) that can rotate in relation to the primary part ( 14 ) and has a secondary core ( 20 ) comprised of magnetically conductive material that has a secondary winding ( 21 ) inserted into it, the primary and secondary parts ( 14 , 15 ) are disposed next to each other in the axial direction and the primary and secondary cores ( 17 , 20 ) have flat end faces ( 171 , 201 ) oriented toward each other, which enclose an axial working air gap ( 23 ) between them, characterized in that the primary and secondary parts ( 14 , 15 ) are accommodated in a chamber ( 12 ), which is open at one end and has a cylindrical chamber wall ( 121 ), a chamber bottom ( 122 ), and a chamber opening ( 123 ), and that a radial annular gap ( 33 ) is provided between the chamber wall ( 121 ) and the secondary part ( 15 ).