| UNIVERSIDAD PUBLICA DE NAVARRA Patent applications |
| Patent application number | Title | Published |
|---|
| 20090167621 | Flat antenna - The present invention relates to antennas of a planar profile coupled to waveguides, and particularly to completely planar antennas, applicable in mobile telephony, radars and space communications, which base their operating on the transmission of electromagnetic waves, mainly in the range of microwaves and millimetric waves, through a thin opening of a height that is less than the wavelength, having corrugations around said opening such that maximized wave transmission as well as the collimation thereof in a defined direction towards leaky waves by means of a resonant coupling mechanism are obtained. | 07-02-2009 |
| 20090008944 | Method And System Of Control Of The Converter Of An Electricity Generation Facility Connected To An Electricity Network In The Presence of Voltage Sags In Said Network - Method and system of control of the converter of an electricity generation facility of the type which comprises at least one electric generator, such as a wind generator, connected to an electricity network, in the presence of voltage sags in said network, the electric generator being a double-fed asynchronous generator formed by two windings, a winding in the stator, directly connected to the network, and a winding in the rotor which is fed on normal regime by said converter which imposes on it a predetermined voltage current called setpoint current. In the event of a voltage sag occurring, the converter imposes a new setpoint current which is the result of adding to the previous setpoint current a demagnetizing current which generates a flow in the rotor winding opposed to the free flow, consequently reducing the voltage in converter connectors. | 01-08-2009 |
