Patent application number | Description | Published |
20080209914 | DEVICE FOR COOLING ELECTRICAL EQUIPMENT IN A TURBOMACHINE - A device for cooling electrical or electronic equipment in a turbomachine, such as a unit for controlling actuators for variable-geometry elements, the device comprising at least one vortex tube having an inlet connected to means for feeding pressurized air taken from an element of the turbomachine, and a cold air outlet connected to means for cooling the electrical equipment. | 09-04-2008 |
20110254475 | ELECTRIC BRAKE SYSTEM WITH MAGNETIC LOSS - An electric brake system for an electromechanical machine connected to output terminals of an inverter, input terminals of which are supplied by a DC voltage source. The system includes an electrical circuit connected between the input terminals of the inverter and including, connected in series: a mechanism dissipating electrical energy returned by the electromechanical machine to the input terminals of the inverter during a braking phase of the electromechanical machine, including an inductor wound around a magnetic circuit; and a switching mechanism to close the electrical circuit during a braking phase of the electromechanical machine and to open the electrical circuit in absence of a braking phase of the electromechanical machine. | 10-20-2011 |
20110273011 | ELECTRICAL SYSTEM FOR STARTING UP AIRCRAFT ENGINES - An electrical system ( | 11-10-2011 |
20120211981 | TURBINE ENGINE STARTER/GENERATOR, AND METHOD FOR THE CONTROL THEREOF - A turbine engine starter-generator including a main electrical machine including a stator and rotor with a wound rotor inducer and damper bars forming a cage, and an exciter including a stator inducer and rotor with rotor windings connected to the rotor inducer of the main electrical machine via a rotary rectifier. During a first starting stage, the electrical machine operates in asynchronous motor mode by injecting AC into its stator windings, a starting torque being generated by the damper bars, without the rotor inducer of the main electrical machine contributing significantly to generating starting torque. Then in a second starting stage, the main electrical machine operates in synchronous motor mode by injecting AC into its stator windings, while feeding its rotor inducer with DC via the exciter, the change from the first stage to the second stage taking place when rotation speed of the shaft reaches a predetermined value. | 08-23-2012 |
20130009580 | METHOD AND DEVICE FOR CONTROLLING A POLYPHASE ELECTRICAL MACHINE - A polyphase electrical machine controlled by at least two parallel inverters, each including a number of branches equal to a number of phases of the machine and controlled by PWM. When detecting an inverter branch is faulty, the faulty branch is isolated and the phase in question is powered by each corresponding other inverter branch. The PWM is modified to make power switches of each other branch conductive in succession, without switching while absolute value of the current of the phase in question is greater than or equal to a threshold of 80% to 120% of (n−1)I | 01-10-2013 |
20130058789 | ACTUATING BLADES OF AN UNDUCTED FAN - An actuator device for actuating a swivel-mounted member carried by a rotor of a propulsion engine including: at least one electricity source; an electric actuator for swiveling the swivel-mounted member; a power supply circuit connecting the electricity source to the actuator; and an inertial device connected to the power supply circuit, the inertial device configured to convert electrical energy coming from the power supply circuit into mechanical energy, to store the mechanical energy, and to convert the mechanical energy into electrical energy for the power supply circuit. | 03-07-2013 |
20130177421 | ELECTRIC POWER SUPPLY FOR APPARATUSES SUPPORTED BY THE ROTOR OF AN AIRCRAFT ENGINE - 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. | 07-11-2013 |
20130234679 | AIRCRAFT POWER SUPPLY CIRCUIT INCLUDING AN ASYNCHRONOUS MACHINE - A power supply circuit for supplying electrical energy in an aircraft, the circuit including a power supply generator configured to be driven in rotation by the engine of the aircraft to power electrical equipment of the aircraft engine. The power supply generator includes an asynchronous machine connected to an excitation device. The asynchronous machine includes a rotor configured to be driven in rotation by the engine and a stator connected to the electrical equipment. The excitation device is configured to cause a reactive current of flow in the stator. | 09-12-2013 |
20140008972 | ELECTRICAL POWER SUPPLY FOR AN AIRCRAFT - A generation method performed by a generator module of an electricity network of an aircraft, the electricity network including a power supply line powered by the generator module, a DC bus powered from the power supply line via a rectifier, and at least one electrical actuator powered with AC from the DC bus via an inverter. The generation method includes: delivering an AC voltage as a function of a voltage setpoint and of a voltage measured in the on-board network; and determining the voltage setpoint as a function of an operating parameter of the actuator. | 01-09-2014 |
20140322017 | ROTARY MECHANICAL SYSTEM WITH CONTACTLESS ACTUATION - A mechanical system including: a shaft rotatably mounted about a primary axis thereof in relation to a structural element; a movable member mounted on the shaft to be fixed to the shaft for rotation therewith about the primary axis and configured to be moved selectively in relation to the shaft; a drive mechanism moving the movable member in relation to the shaft, and including a first fixed portion mounted on the structural element, a second movable portion mounted on the shaft and connected to the movable member, and an air gap electromechanical actuator between the first portion and the second portion. | 10-30-2014 |
20150083944 | ELECTRICALLY CONTROLLED ACTUATING DEVICE INCORPORATING A THERMOSTATIC FUNCTION, AND VALVE - A actuating device includes a fixed portion forming a frame including an inlet intended to receive a fluid, a main outlet and a sampling outlet and a return device for exerting a mechanical force on a movable portion; a movable portion including a shutter moving between an open position and a closed position; a thermostatic device including a conical turning disc, the turning of the disc above a known critical temperature driving the shutter to the closed position of same; a control device allowing a holding force for holding the shutter to be generated, the control device being able to be controlled in such a way that below the critical temperature, the opening or the closing of the valve results from the balance between the holding force and the mechanical force. | 03-26-2015 |