Downhole torque-generating and generator combination apparatus

Details Downhole torque-generating and generator combination apparatus Downhole torque-generating and generator combination apparatus

H - Electricity

02

K

H02K 49/04 (2006.01) E21B 4/04 (2006.01) E21B 7/06 (2006.01) E21B 17/02 (2006.01) E21B 41/00 (2006.01) F04D 13/10 (2006.01) F04D 15/00 (2006.01) F04D 29/66 (2006.01) H02K 7/18 (2006.01) H02K 16/02 (2006.01) H02K 17/34 (2006.01)

Patent

CA 2444811

A combination of a torque-generating apparatus with an alternator/generator. The torque-generating apparatus comprises a first assembly (10, 25) including a generally cylindrical member of magnetically soft material and having a longitudinal axis, and a second assembly (2) arranged coaxially within the first assembly and including an electromagnetic winding (4). The first assembly (10, 25) and the second assembly (2) are rotatable relative to each other about the axis. Relative rotation between the first (10, 25) and second (2) assemblies induces a magnetic field which generates rotational torque between the first and second assemblies. Rectification means (31) is provided to convert alternating current electrical output from the alternator/generator (22) to provide D.C. current to the electromagnetic windings (4) of the torque generating apparatus to generate an electromagnetic braking effect.

L'invention concerne un générateur de couple combiné avec un alternateur/générateur. Ce générateur de couple comprend un premier montage (10, 25) formé par un élément globalement cylindrique constitué d'un matériau magnétique souple et d'un axe longitudinal, et un second montage (2) disposé de manière coaxiale dans le premier montage et équipé d'un enroulement électromagnétique (4). Le premier montage (10-25) et le second montage (2) sont rotatifs l'un par rapport à l'autre, autour de l'axe. Le mouvement de rotation relatif entre le premier montage (10, 25) et le second montage (2) permet d'induire un champ magnétique générant un couple rotatif entre le premier et le second montage. Un redresseur (31) permet de transformer le courant électrique alternatif de sortie de l'alternateur/générateur (22) en courant continu transmis aux enroulements électromagnétiques (4) du générateur de couple pour générer un effet de freinage électromagnétique.

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