Aircraft ventilation device
View Patent ↗The ventilation device according to the invention includes a fan and an inverter. The fan comprises a rotary electrical machine and a wheel for setting an air flow into motion, integral with the rotary machine to set it in rotation. The inverter is connected to the rotary machine and, in one motor power mode of the ventilation device, is suitable for forming the supply current of the rotary machine. The inverter is suitable for being connected to a power supply network. The inverter is reversible and is, in a generating mode of the ventilation device, suitable for converting the electrical energy supplied by the rotary machine when it is driven mechanically by the wheel and injecting said converted electrical energy into the power supply network.
1. An aircraft ventilation device comprising:
a fan comprising a rotary electrical machine and a wheel for setting an air flow in motion, integral with the rotary machine for setting in rotation thereof; and
an inverter suitable for being connected to a power supply network, and to which the rotary machine is connected, the inverter being, in one motor supply mode of the ventilation device, suitable for forming the supply current of the rotary machine, the inverter being reversible and being, in an energy generating mode of the ventilation device, suitable for converting the electrical energy supplied by the rotary machine when it is mechanically driven by the wheel, and injecting said converted electrical energy into the power supply network,
wherein the ventilation device comprises a controller and a distributor extending transversely in front of the wheel, the distributor including vanes extending radially, the controller, controlling the orientation of the vanes so that in the motor supply mode, the vanes are oriented in a first position maximizing an air flow generated by the wheel when it is driven by the rotary machine, and, in the energy generating mode, the vanes are oriented in a second position maximizing the electrical energy supplied by the rotary machine when it is driven by the wheel, itself being driven by a flow of air passing through the distributor, the first and second positions being distinct from one another,
wherein the inverter comprises a set of switches, and
wherein, in the energy-generating mode, the set of switches of the inverter forms a bridge rectifier controlled by the controller.
2. The ventilation device according to claim 1 , further comprising a low-pass filter inserted between the inverter and the power network for filtering of the current coming from the inverter.
3. The ventilation device according to claim 1 , wherein the current output by the ventilation device in the energy generating mode is a direct current with a voltage between 500 and 600 volts.
4. The ventilation device according to claim 1 , wherein the current output by the ventilation device in the energy generating mode is a direct current with a voltage between 520 and 560 volts.
5. The ventilation device according to claim 1 , wherein the direction of rotation of the wheel is identical when the current is consumed by the fan and when the current is produced by the fan.
6. The ventilation device according to claim 1 , wherein the inverter comprises three branches mounted in parallel, each branch including two serially mounted switches, controlled by a controller and between which a feed point of the electrical machine is formed, each switch including a transistor and a diode mounted in antiparallel.
7. The ventilation device according to claim 1 , wherein the transistors are insulated-gate bipolar transistors.
8. The ventilation device according to claim 1 , wherein the rotary machine is a synchronous machine.
9. The ventilation device according to claim 8 , wherein a rotor of the rotary machine comprises permanent magnets.