Patent application number | Description | Published |
20090136687 | TOPOLOGICALLY STRUCTURED POLYMER COATING - Sub-micron-structured (nanostructured) polymer film or coatings are made by coating a substrate with a mixture of materials. One of the materials is removed using a selective solvent, leaving pores or other nanostructure. The substrate may be grooved, providing a competing nanostructure. The coating may act as an antireflective coating, optical retarder, optical diffuser, or orientation layer. | 05-28-2009 |
20100026935 | VOLUME PHOTO-ALIGNED RETARDER - This invention relates to a birefringent layer, wherein the direction of the optical axis varies along the thickness direction of the layer, comprising
| 02-04-2010 |
20110109200 | TWO- OR MULTI-LAYER FERRELECTRET AND METHOD FOR THE PRODUCTION THEREOF - The present invention relates to a method for producing two- or multi-layer ferroelectrets with defined voids, with the exception of three-layer ferroelectrets with a perforated middle layer made of PTFE between two FEP layers, involving, introducing one or more clearances into at least one surface side of a polymer film element by means of a method of removal, applying a first covering to the surface side of the polymer film element comprising clearances formed in step A), and joining the polymer film element and the covering to form a polymer film composite, the clearances being closed while voids are formed, and to a two- or multi-layer ferroelectret, with the exception of three-layer ferroelectrets with a perforated middle layer made of PTFE between two FFP layers, in particular produced by this method. The invention also relates to a piezoelectric element containing a ferroelectret multi-layer composite according to the invention. | 05-12-2011 |
20120126663 | METHOD FOR PRODUCING AN ELECTROMECHANICAL CONVERTER - The present invention relates to a method for producing an electromechanical, for example piezoelectric, transducer, comprising the steps of: A) applying a monolayer of spacer elements ( | 05-24-2012 |
20130140541 | LAYER STRUCTURE COMPRISING ELECTROTECHNICAL COMPONENTS - The present invention provides a layer structure comprising a substrate ( | 06-06-2013 |
Patent application number | Description | Published |
20110225442 | METHOD FOR THE OPERATION OF SYNCHRONOUS MOTORS, AND ASSOCIATED DEVICE - Synchronous motors are controlled using a three-phase AC power controller. According to at least one embodiment of the invention, a fundamental wave having the desired frequency is defined for the first phase, and corresponding fundamental waves which have the same frequency as the frequency in the first phase but are out of phase by specific values are defined in the other phases. The triggering times during which the generated current pulse concurrently has the same polarity as the respective fundamental wave in two of the phases are determined for each phase and are used. Two of the three fundamental waves are generated in phase opposition when the desired frequency amounts to half the system frequency. | 09-15-2011 |
20120313566 | DEVICE FOR OPERATING SYNCHRONOUS MOTORS AND ASSOCIATED METHOD - The synchronous motors are controlled by a three-phase AC power controller. According to an embodiment of the invention, firing points for the AC power controller are determined. A pair of two or three phases is determined from the angular position of the rotor, for which the firing points can be present for the respective A.C power controller. Actual firing points are determined from the mains voltage phase position of the phases so that only positive torque is produced. | 12-13-2012 |
20140312814 | METHOD AND ASSEMBLY FOR OPERATING SYNCHRONOUS MOTORS - A method is disclosed for operating a synchronous machine by way of a three-phase AC power controller, which is connected to a three-phase network. The embodiment of the method includes determining the phase difference between the magnet-wheel voltage of the synchronous machine and the network voltage of the three-phase network; determining the rotational speed of the rotor of the synchronous machine; determining the phase position of the three-phase network; determining a decision characteristic number on the basis of a stored data table calculated in advance, which data table associates a decision characteristic number with value triples of phase difference, phase position, and rotational speed; and determining at least one switching time point on the basis of the decision characteristic number. | 10-23-2014 |
20140312826 | METHOD AND ASSEMBLY FOR OPERATING SYNCHRONOUS MOTORS - A method is disclosed for operating a synchronous machine via a three-phase power controller including three semiconductor controllers and connected to a three-phase network. The method includes determining the phase difference between the magnet-wheel voltage of the synchronous machine and the network voltage of the three-phase network; determining the rotational speed of the rotor of the synchronous machine; determining the phase position of the three-phase network; determining at least some of the stator currents of the synchronous machine; determining a decision characteristic number based upon an advance calculation of the torque curve in the event of activation of at least two of the semiconductor controllers while taking into account the current values for phase difference, rotational speed, stator current, and phase position; and determining at least one switching time point based upon the decision characteristic number, wherein the at least two semiconductor controllers are activated at the switching time point. | 10-23-2014 |