EARTHING DEVICE AND ROTATING ELECTRIC MACHINE INCLUDING THE DEVICE

Title:

EARTHING DEVICE AND ROTATING ELECTRIC MACHINE INCLUDING THE DEVICE

Document Type and Number:

WIPO Patent Application WO1997045929

Kind Code:

A3

Abstract:

In an electric machine including a core of one or more electric conductors (1) surrounded by insulating layers, comprising an inner semiconducting layer (2), an intermediate insulating layer (3) and an outer semiconducting layer (4), the outer semiconducting layer (4) is electrically connected to the earth reference (10) of the machine. For this purpose the outer semiconducting layer (4) is surrounded by a sheet metal earthing plate (5) which is clamped firmly around the outer semiconducting layer (4) by at least one earthing screw (7) and is in electrically conducting contact therewith. The sheet metal earthing plate (5) is electrically connected via an earth wire (8), preferably connected to the earthing screw (7), to said earth reference (10). In a stator winding to a high-voltage generator each winding part is provided with at least one sheet metal earthing plate (5), the sheet metal earthing plates in the various winding parts being electrically connected in series to the earth reference (10).

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Inventors:

LEIJON MATS (SE)
MING LI (SE)
GERTMAR LARS (SE)
CARSTENSEN PETER (SE)
KYLANDER GUNNAR (SE)
FROMM UDO (SE)

Application Number:

PCT/SE1997/000900

Publication Date:

January 29, 1998

Filing Date:

May 27, 1997

Export Citation:

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Assignee:

ASEA BROWN BOVERI (SE)
LEIJON MATS (SE)
MING LI (SE)
GERTMAR LARS (SE)
CARSTENSEN PETER (SE)
KYLANDER GUNNAR (SE)
FROMM UDO (SE)

International Classes:

H01F3/10; H01F3/14; H01F27/28; H01F27/32; H01F27/34; H02K3/14; H02K3/28; H02K3/40; H02K3/48; H02K15/00; H02K15/12; H02K9/19; (IPC1-7): H02K3/40

Foreign References:

US5036165A	1991-07-30
DE4409794C1	1995-08-24
US1418856A	1922-06-06
DE2050674A1	1971-05-19
DE584639C	1933-09-27
DE4022476A1	1992-01-16

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