Brune test
The Brune test is used to check the admissibility of an interconnection of two-ports in the context of the analysis of electrical networks and circuits. The Brune test was named after the South African engineer Otto Brune .
This test is mainly used for symmetrical four-pole connections that do not have a continuous connection. When they are interconnected , the gate condition , also referred to as push-pull current condition, which was assumed when deriving the four-pole parameters of the individual four-poles, is usually violated.
Series connection of four-pole
To check whether two four-pole terminals can be connected in series at the input and output, you first connect the inputs in series, apply a voltage there and measure / calculate the open circuit voltage between the terminals to be connected on the output side. If there is voltage here, the four-pole terminals must not be interconnected. The same test is repeated from the direction of the outputs: Series connection of the outputs, application of a voltage, measurement / calculation of the open circuit voltage between the terminals to be connected on the input side. A series connection of the individual four-poles is only permitted if there is no voltage in both cases.
Parallel connection of four-pole
To check whether two four-pole terminals can be connected in parallel at the input and output, you first connect the inputs in parallel, apply a voltage there and measure / calculate the open circuit voltage between the short-circuited outputs. If there is voltage here, the four-pole terminals must not be interconnected. The same test is repeated from the direction of the outputs: parallel connection of the outputs, application of a voltage, measurement / calculation of the open circuit voltage between the short-circuited inputs. A parallel connection of the individual four-poles is only permitted if there is no voltage in both cases.
Hybrid circuit of four-pole
The same considerations as above apply to the hybrid connection (series-parallel connection) and the inverse hybrid connection (parallel-series connection).
Individual evidence
- ^ O. Brune: Letter to the editor. To: "The scope of the Strecker-Feldtkeller matrix equations of four-pole systems" . In: F. Moench (Ed.): Electrical communications engineering . tape 9 , no. 6 . Berlin June 1932, p. 234 .
- ↑ Steffen Paul, Reinhold Paul: Fundamentals of electrical engineering and electronics 1 - Springer . doi : 10.1007 / 978-3-642-53948-0 ( springer.com [accessed January 4, 2017]).