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1. 发明公开

EP3477840A1 WELDING TRANSFORMER 有权
公开(公告)号：EP3477840A1
公开(公告)日：2019-05-01
申请号：EP18000829.4
申请日：2018-10-25
申请人： Univerza v Mariboru, Fakulteta za elektrotehniko, racunalnistvo in informatiko
发明人： Brezovnik, Robert , Dolinar, Drago , Petrun, Martin , Ritonja, Jozef , Truntic, Mitja
IPC分类号： H02M3/335 , B23K9/09 , H01F27/28 , H01F38/08 , B23K9/10 , B23K11/24 , H02M1/00
CPC分类号： H02M3/335 , B23K11/11 , B23K11/241 , H01F27/40 , H01F38/085 , H01F2027/408 , H02M3/33592 , H02M2001/0064
摘要： The invention solves the technical problem of the too long connections between the output from the secondary winding and an output rectifier also reducing the need for intensive cooling of rectifier means by integrating the rectifier means in the form of power diodes or MOSFET transistors into the parts of the secondary winding, where the arrangement is not more complex compared to the conventional solutions, however, it enables substantially shorter output connections. The proposed modified structure changes the electrical parameters of the welding system in such a way that, despite the required unchanged maximum value of the welding current and the use of rectifier means in the form of power diodes or MOSFET transistors, it is possible to further reduce electrical losses in secondary connections that become shorter, while simplifying also the cooling of rectifier means in the form of power diode or MOSFET transistors, which, with the proposed integration of secondary windings with output rectifier means in the form of power diode or MOSFET transistors, is cooled indirectly simultaneously with the cooling of the secondary winding. The proposed embodiment allows a significant increase in the power density of the welding transformer with an output rectifier. Because of the change in the electrical properties of the secondary part of the system, it is also possible to operate at slightly higher frequencies than 1 kHz, without parallelizing the secondary winding.

2. 发明公开

EP3503133A1 TRANSFORMER ARRANGEMENT 审中-公开
公开(公告)号：EP3503133A1
公开(公告)日：2019-06-26
申请号：EP18000967.2
申请日：2018-12-13
申请人： Univerza v Mariboru, Fakulteta za elektrotehniko, racunalnistvo in informatiko
发明人： Brezovnik, Robert , Dolinar, Drago , Petrun, Martin , Ritonja, Jozef
IPC分类号： H01F27/16 , H01F27/28 , H01F27/40 , B23K11/24
摘要： Arrangement of a transformer with an output rectifier (30) comprising at least one primary winding (231) that consists of at least one segment made with several turns, wound at a suitable distance around the transformer axis (300), an iron core (236) electrically isolated from said primary winding, at least one secondary winding (233) electrically isolated from said primary winding and said iron core, comprising a first part (234) of said at least one secondary winding and a second part (235) of said at least one secondary winding, wherein both are wound at appropriate distances around the transformer axis (300), between which at least one primary winding coil is arranged, wherein said primary winding and said secondary winding overlap along the axis (500) in a part surrounded by an iron core and further, wherein the said primary winding and the said secondary winding in the part of the winding heads, which are not surrounded by the iron core, overlap only partially or do not overlap, which allows straight and short arrangement of the connections of an output rectifier in the direction of the axis (500).
As a result of the proposed transformer arrangement improved electromagnetic properties of the welding system are obtained, which provides a more homogeneous distribution of magnetic field in the iron core and a homogeneous distribution of electric currents in conductive parts, which affects the reduction of transformer power loss and operation with the higher frequency of the supply voltage. The arrangement of the secondary winding according to the present invention at the same time enables a much simpler production of the cooling of the welding transformer with output rectifier by liquid coolant by making bores of the adequate dimensions.

3. 发明授权

EP3477840B1 WELDING TRANSFORMER 有权
公开(公告)号：EP3477840B1
公开(公告)日：2020-05-27
申请号：EP18000829.4
申请日：2018-10-25
申请人： Univerza v Mariboru, Fakulteta za elektrotehniko, racunalnistvo in informatiko
发明人： Brezovnik, Robert , Dolinar, Drago , Petrun, Martin , Ritonja, Jozef , Truntic, Mitja
IPC分类号： H02M3/335 , B23K9/09 , H01F27/28 , H01F38/08 , B23K9/10 , B23K11/24 , H02M1/00

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