Device for detecting a short-circuit fault in a winding of an electric machine
AssigneeSafran Electrical & Power
InventorsFrédéric MEER, Eric DE WERGIFOSSE
Life of this patent
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Abstract
An electric machine including at least one phase including two electrical paths in parallel, each electrical path of one and the same phase including a winding, the first electrical paths of all the phases being connected to one and the same first electrical node and the second electrical paths of all the phases being connected to one and the same second electrical node, the electric machine includes an equipotential wire electrically connecting the first and second electrical nodes and a current sensor configured to measure an electric current circulating in the equipotential wire.
Claims4
An assembly of an electric machine comprising at least one phase including two electrical paths in parallel, each electrical path of one and the same phase including a winding, the first electrical paths of all the phases being connected to one and the same first electrical node and the second electrical paths of all the phases being connected to one and the same second electrical node and means for detecting a short circuit between at least two turns of a winding of a phase, characterized in that the electric machine comprises an equipotential wire electrically connecting the first and second electrical nodes and a current sensor configured to measure an electric current circulating in the equipotential wire, and in that the detecting means are configured to compare the electric current measured by the current sensor to a detection threshold equal to at least twice a residual current circulating in the equipotential wire in the absence of any short circuit between turns of said windings.
Dependencies are inferred from the claim text.