Converter units, especially combined converters
A technology for converters and secondary windings, applied in transformer/inductor shells, transformers, transformer/inductor coils/windings/connections, etc., can solve the problems of core magnetic permeability reduction, volume shrinkage, etc., and achieve converter unit compact effect
Inactive Publication Date: 2017-07-07
SIEMENS AG
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- Abstract
- Description
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- Application Information
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Problems solved by technology
However, it has the disadvantage that during the chemical polymerization of the casting material, volumetric shrinkage occurs, which is associated with stress on the winding, which in particular reduces the magnetic permeability of the core when the core is made of soft iron
Method used
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Embodiment Construction
[0022] figure 1 Shown is a schematic sectional view of a converter unit 1 (combined converter) for a circuit breaker (not shown), from which the circuit breaker is supplied with electrical energy and signals for current measurement.
[0023] The converter unit 1 has a pot-shaped housing 2 made of electrically insulating plastic material. On the housing bottom 2a is molded (channel) a hollow cylinder 2b (generally referred to as channel 2c), through which a current conductor (not shown) extending as the primary conductor (primary winding) of the converter unit 1 extends. out). Here, the synthetic material has, for example, an insulating capacity of approximately 20-30 kV / mm.
[0024] The (first) secondary winding 3 is located on the housing bottom 2a, arranged concentrically with the hollow cylinder 2b, and wound on a non-magnetic toroidal core 4 (Rogowskiwandler for current measurement) . The secondary winding 3 is embedded in an electrically insulating solid plastic mater...
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Abstract
The invention relates to a converter unit (1) having a housing (2) having a hollow cylinder (2b) molded thereon, the hollow cylinder (2b) extending into the housing (2) ), the converter unit has a non-magnetic toroidal core (4) carrying a first secondary winding (3) placed concentrically with the hollow cylinder (2b) on the housing bottom (2a) and Embedded in a solid material (5), the converter unit has a magnetic toroidal core (8) carrying a second secondary winding (7) arranged concentrically with the hollow cylinder (2b) in a non-magnetic toroid Above the core (8) and the converter unit there is a casting material (12) with which the housing opening is closed. In order to achieve a miniaturized converter unit, a first flat spacer element (6) is arranged between the first and second secondary windings (3,7), wherein it rests against the first secondary winding (3) and the second secondary winding (3,7). Secondary winding (7). Furthermore, the space between the second secondary winding (7) and the housing wall (2d) is filled with electrically insulating particles (9) and the potting material (12) extends at least as far as above in the direction of the housing opening. of particles (9).
Description
technical field [0001] The invention relates to a converter unit according to the preamble of claim 1 , in particular a combined converter having a converter for current measurement and a converter for current supply in a common housing. Background technique [0002] Combined converters are known having a first secondary winding wound on a non-magnetic toroidal core and a second secondary winding wound on a magnetic toroidal core (core). In this case, the two secondary windings are arranged in a common housing, which has the shape of a pot with a channel hollow cylinder molded on the bottom of the housing. In this case, the first secondary winding is used for current measurement (transformer for current measurement), and the second secondary winding is used for current supply (transformer for current supply), wherein the electrical conductors are led through The hollow cylinder and annular core pass through and form the primary winding of the converter. The magnetic ring c...
Claims
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IPC IPC(8): H01F27/02H01F27/32H01F38/30
CPCH01F27/02H01F27/022H01F27/32H01F27/327H01F38/14H01F38/30H01F2038/305H01F27/2823
Inventor M.格罗斯W.费希尔V.缪勒
Owner SIEMENS AG