METHOD AND APPARATUS FOR DETECTING INTERTURN FAULTS, AND ELECTRICAL MACHINE

摘要

An apparatus for detecting interturn faults inside a rotor winding of a rotating electrical machine with a measuring device. The measuring device has at least two measuring coils oriented differently in space such that, in the case of a measuring device oriented with respect to the rotor winding, a voltage is induced inside the first measuring coil by a first directional component of the magnetic flux density B of the rotating electrical machine and a different voltage is induced inside the further measuring coil by a further directional component of this magnetic flux density B, which directional component differs from the first directional component. The at least two measuring coils oriented differently in space are arranged together on a head part of the measuring device, where interturn faults present on the rotor winding are detected based on temporal voltage profiles of the voltages induced in the two measuring coils.

主权项

1. An apparatus for detecting interturn faults inside a rotor winding of a rotating electrical machine by means of a measuring device, wherein the measuring device comprises
at least two measuring coils that are oriented differently in space in such a manner that, in the case of a measuring device accordingly oriented with respect to the rotor winding, a voltage induction is generated inside the first measuring coil by means of a first directional component of the magnetic flux density B of the rotating electrical machine, and a different voltage induction is generated inside the further measuring coil by means of a further directional component of this magnetic flux density B, which directional component differs from the first directional component, wherein the at least two measuring coils that are oriented differently in space are jointly disposed on a head part of the measuring device in such a manner that interturn faults present on the rotor winding are detectable in dependence on voltage time characteristics of the voltages induced in the two measuring coils.