Labinal Power Systems

Safran Electrical & Power

Cedric Duval

Eric De Wergifosse

An apparatus including a fixed part, a rotary support configured to be driven in rotation relative to the fixed part, at least one item of electrical equipment carried by the rotary support, and a power supply device configured to supply electrical energy to the electrical equipment. The power supply device includes an asynchronous machine including a stator fixed to the fixed part and a rotor carried by the rotary support, and an excitation device. The stator includes an electrical circuit including at least one switch configured to switch between an open state in which the electrical circuit is open and a closed state in which the electrical circuit is closed. The rotor includes at least one winding connected to the electrical equipment. The excitation device is configured to provide a reactive current to the electrical circuit of the stator or to the winding of the rotor.

Electrical power supply for equipment carried by a rotary support

An electrical power supply including an asynchronous machine, an arrangement for driving a rotor of the asynchronous machine in rotation by a rotor of an engine, and an electrical connection for powering electrical equipment by the rotor of the asynchronous machine. The asynchronous machine is configured to receive AC electrical power via a stator of the asynchronous machine, and it presents, over a predetermined range of drive speeds of the rotor of the asynchronous machine under drive by the rotor of the engine, efficiency in transferring electrical power from the stator to the rotor that is privileged relative to the efficiency with which rotary mechanical power is converted into electrical power.

Electrical power supply system comprising an asynchronous machine, and an engine fitted with such an electrical power supply system

A three-phase transformer including a primary portion and a secondary portion, the primary portion including a first body made of ferromagnetic material and primary coils, the secondary portion including a second body made of ferromagnetic material and secondary coils, the first body defining a first annular slot of axis A and a second annular slot of axis A. The primary coils include a first toroidal coil of axis A in the first slot, a second toroidal coil of axis A in the first slot, a third toroidal coil of axis A in the second slot, and a fourth toroidal coil of axis A in the second slot, the second coil and the third coil being connected in series.

Magnetically shielded three-phase rotary transformer

An aircraft engine including: a stator; a main shaft; a first rotor; a second rotor; a transmission mechanism; a first electrical apparatus supported by the first rotor and a second electrical apparatus supported by the second rotor; at least one first field winding supported by the stator; a control unit configured to circulate direct electric current in the first field winding; at least one first armature winding supported by the first rotor and connected to the first electrical apparatus and at least one second armature winding supported by the second rotor and connected to the second electrical apparatus.

Electric power supply for apparatuses supported by the rotor of an aircraft engine

A three-phase transformer including a primary portion and a secondary portion, the primary portion including a first body made of ferromagnetic material and primary coils, the secondary portion including a second body made of ferromagnetic material and secondary coils, the first body defining a first annular slot of axis A and a second annular slot of axis A, the primary coils including a first toroidal coil of axis A in the first slot, a second toroidal coil of axis A in the second slot, and one or more third toroidal coils connected in series, the third coils being wound around one of the legs, and passing via slots in the leg.

Magnetically shielded three phase rotary transformer having three magnetic cores

A three-phase/two-phase rotary transformer, includes a first single-phase rotary transformer and a second single-phase rotary transformer, the first transformer including a first body defining a first slot, a first coil in the first slot, a second body defining a second slot, and a second coil in the second slot, the second transformer including a third body defining a third slot, a third coil in the third slot, a fourth body defining a fourth slot, and a fourth coil in the fourth slot, wherein one terminal of the first coil is connected to the midpoint of the third coil, the first body, the first coil, the third body, and the third coil forming a three-phase portion of the transformer, the second body, the second coil, the fourth body, and said fourth coil forming a two-phase portion of the transformer.

Three-phase/two-phase rotary transformer including a scott connection

A three-phase-two-phase transformer including a magnetic circuit, three-phase windings, and two-phase windings, wherein the magnetic circuit includes a first column, a second column, and a third column that are magnetically connected together, the three-phase windings including a first winding, a second winding, and a third winding. The two-phase windings include a fourth winding around the first column, a fifth winding around the first column, a sixth winding around the third column, and a seventh winding around the third column, the fourth winding and the seventh winding being connected in series and forming a first two-phase phase, and the fifth winding and the sixth winding being connected in series and forming a second two-phase phase.

Three-phase-two-phase stationary transformer with forced linked flux

A three-phase/two-phase rotary transformer including a three-phase portion and a two-phase portion that are movable in rotation relative to each other about an axis A. The three-phase portion includes a first body made of ferromagnetic material and three-phase coils, the two-phase portion including a second body made of ferromagnetic material and two-phase coils. The second body defines a first annular slot of axis A and a second annular slot of axis A, the two-phase coils including a first toroidal coil of axis A in the first slot, a second toroidal coil of axis A in the first slot, a third toroidal coil of axis A in the second slot, and a fourth toroidal coil of axis A in the second slot, the first coil and the fourth coil being connected in series, the second coil and the third coil being connected in series.

Three-phase/two-phase rotary transformer

A rotary three-phase transformer with free linked fluxes including a first portion and a second portion that are movable in rotation relative to each other about an axis A. A first body defines a first annular slot of axis A, a second annular slot of axis A, a third annular slot of axis A, and a fourth annular slot of axis A. The coils of the first portion include a first toroidal coil of axis A in the first slot, a second toroidal coil of axis A in the second slot, a third toroidal coil of axis A in the second slot, a fourth toroidal coil of axis A in the third slot, a fifth toroidal coil of axis A in the third slot, and a sixth toroidal coil of axis A in the fourth slot.

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Samois sur Seine, France

Cedric Duval