HEAVY-CURRENT TRANSFORMER HAVING A MULTI-POINT CONTACTING, TRANSFORMER ELEMENT, CONTACT PLATE AND SECONDARY WINDING, AND METHOD FOR PRODUCING SUCH A HEAVY-CURRENT TRANSFORMER
1 Assignment
0 Petitions
Accused Products
Abstract
The invention relates to a heavy-current transformer (12), in particular for a power source (10) in order to provide a welding current of a resistance welding device (1), with at least one primary winding (13) and at least one secondary winding (14) with center tapping, and to a transformer element, a contact plate (29) and a secondary winding (14) for such a heavy-current transformer (12) as well as a method for the manufacturing thereof. For reduction of losses and improvement of efficiency, at least four contacts (20, 21, 22, 23) are provided to form a multi-point contacting, said contacts (20, 21, 22, 23) being formed by four contact faces within which the at least one primary winding (13) and the at least one secondary winding (14) are arranged in a series/parallel connection.
-
Citations
69 Claims
-
1-50. -50. (canceled)
- 51. A heavy-current transformer (12), in particular for a power source (10) in order to provide a welding current of a resistance welding device (1), with at least one primary winding (13) and at least one secondary winding (14) with center tapping, wherein at least four contacts (20, 21, 22, 23) are provided to form a multi-point contacting, whereby the welding current is at least halved and the contact losses are thus reduced, said contacts (20, 21, 22, 23) being formed by four contact faces within which the at least one primary winding (13) and the at least one secondary winding (14) are arranged in a series/parallel connection.
- 65. A method for manufacturing a heavy-current transformer (12) comprising at least one primary winding (13) and at least one secondary winding (14) with surfaces (47) for contacting, wherein at first inner surfaces (47) of the at least one secondary winding (14) are connected with an I-beam (25) of electrically conductive material of the heavy-current transformer (12) with a first soldering material at a first, higher melting temperature (Ts1), and subsequently at least one contact plate (29) of electrically conductive material is soldered with exterior surfaces (47) of the at least one secondary winding (14) with a second soldering material at a second melting temperature (TS2) that is lower as compared to the first melting temperature (TS1).
Specification