Method and apparatus for the detection of the current distributi

Details Method and apparatus for the detection of the current distributi Method and apparatus for the detection of the current distributi

1995-08-02

1997-08-26

Karlsen, Ernest F.

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

327127, 327545, G01R 3106, G01R 120

Patent

active

056614101

ABSTRACT:
A method and an apparatus for the detection of the current distribution in at least one conductor (W1, W2) of an electric machine are specified, which indirectly permit, in a simple manner, the metrological determination of said distribution. The conductors or Roebel bars (W1, W2) are arranged in a slot (4) of a stator laminate stack (3) of the electric machine and each has a plurality of mutually electrically insulated and transposed conductor elements (W1nl, W1nr; W2nl, W2nr). A probe holder (6) which can be displaced radially with regard to the electric machine and contains, in recesses, 2 magnetic field probes (M1, M2) with a predeterminable center-to-center distance (d) is provided, adjacent to these conductors (W1, W2) in a probe channel (17) within the slot (4). The magnetic transverse field within the slot (4) is measured using said probes. For the purpose of determining the electric current distribution, this magnetic transverse field strength is combined, by multiplication, with a width (b) of the slot (4).

REFERENCES:
patent: 1522196 (1925-01-01), MacMillan
patent: 3624504 (1971-11-01), Joly
patent: 3855529 (1974-12-01), Langweiler
patent: 4230961 (1980-10-01), Calfo et al.
patent: 4245181 (1981-01-01), Plunkett
"Isoliersysteme fur Hydrogeneratoren, Stand der Technik und Betriebserfahrungen", R. Schuler, Brown Boveri Mitt. 2-80, pp. 135-140, Feb. 1980.
"Beruhrungslose Messung und Uberwachung des Luftspaltes elektrischer Maschinen", S. Lebeda, et al., Brown Boveri Mitt. 5-78, pp. 312-317, May 1978.

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