| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 324650000 | Using phasor or vector analysis | 10 |
| 20090027067 | Method and system for real time identification of voltage stability via identification of weakest lines and buses contributing to power system collapse - A method of identifying voltage instability in a power system via identification of a weakest line and bus that contribute to the collapse of the system is provided. The method includes periodically calculating an extended line stability index for the transmission lines monitored in the power system; and using the extended line stability index to determine the distance of an operation state in the power system from a collapse point of the system caused by voltage instability. | 01-29-2009 |
| 20090167323 | Dynamic Range Recovery for Pulse-Modulated Measurements - A system composed of an RF input, a receiver system and, connected in series between the RF input and the receiver, an amplifier, a gate switch and a bandpass filter. The receiver system is operable to determine the characteristic of the DUT based on an RF input signal received from the DUT. The amplifier receives and amplifies the RF input signal to generate an amplified signal at a power level that exceeds the maximum input power of the receiver system. The bandpass filter is configured to select from the gated signal a selected signal comprising a wanted frequency component. The band-pass filter has a rise-time in relation to the ON time of the gate switch such that the selected signal has a maximum power that does not exceed the maximum input power of the receiver system. In another embodiment, the system additionally comprises a mixer interposed between the RF input and the amplifier. | 07-02-2009 |
| 20090309612 | METHOD AND APPARATUS FOR DETERMINING CIRCULAR CHARACTERISTIC - A method and a system for determining a circular characteristic for distance protection of a three-phase electric line, the system comprising means for detecting a fault on the electric line, means for identifying a faulted phase or phases of the electric line, means for determining, at a measuring point, a first fault loop impedance by using voltage(s) of the faulted phase(s), a second fault loop impedance by using a polarization voltage and a third fault loop impedance by using predetermined line parameters, and means for determining a radius and midpoint of the circular characteristic. | 12-17-2009 |
| 20130099800 | ALGORITHM AND IMPLEMENTATION SYSTEM FOR MEASURING IMPEDANCE IN THE D-Q DOMAIN - A controller and infrastructure for an impedance analyzer measures responses to perturbations to respective phases of a multi-phase system at an interface between stages thereof (which may be considered as a source and load in regard to each other), such as a multi-phase electrical power system, to determine a transfer function for each phase of the multi-phase system from which the impedance of each of the source and load can be calculated, particularly for assessing the stability of the multi-phase system. | 04-25-2013 |
| 20140070820 | Electronic Power Converter - The present invention relates to electronic power converter suitable, in a first mode, for receiving electrical voltage and/or current magnitudes from a first device as input, for processing them using processing means capable of measuring said electrical magnitudes and servocontrolling said electrical magnitudes based on said measurements and constraints specific to a second device, and for providing the adapted voltage and/or current magnitudes to said second device. | 03-13-2014 |
| 20150309098 | DETECTOR CIRCUIT - A device comprises a multiplication circuit configured to derive a product of a first signal S | 10-29-2015 |
| 20160059212 | WATER VAPOR ADSORPTION-DESORPTION MATERIAL AND METHOD FOR MEASURING LCST BEHAVIOR - Provided is a water vapor adsorption-desorption material in which a substance having a LCST is uniformly retained inside pores of a mesoporous body, which can reduce energy required for regeneration, and a method for measuring LCST behavior capable of measuring LCST behavior of an ionic liquid used in the water vapor adsorption-desorption material without errors. The water vapor adsorption-desorption material includes a mesoporous body and an ionic liquid retained inside pores of the mesoporous body, the ionic liquid exhibiting LCST behavior, and the method for measuring LCST behavior of an ionic liquid used for a water vapor adsorption-desorption material, the method including detecting a change of hydration/dehydration state of a mixture of the ionic liquid and water as electric signals, by means of AC impedance measurement. | 03-03-2016 |
| 20160161562 | APPARATUS AND METHOD FOR DETERMINING IMPEDANCE CHARACTERISTICS OF AN ELECTRICAL LOAD - Apparatus ( | 06-09-2016 |
| 324651000 | With a bridge circuit | 2 |
| 20100102829 | Vector Network Analyzer (VNA) on a Chip - A front end of a vector network analyzer (VNA) on an integrated circuit includes a clock generator and two ports. The VNA couples to a device under test (DUT) using the two ports. Each port may include a plurality of receivers and a VSWR bridge, and can be configured as either an input or an output. The clock generator can generate a stimulus signal, an in-phase I clock signal, and a quadrature-phase Q clock signal. The output port provides the stimulus signal to the DUT and measures both reference and reflected power from the DUT, such as by utilizing two receivers by using direct conversion and the I and Q clock signals. The input port measures transmitted power through the DUT using a second VSWR bridge and one of its receivers by using direct conversion along with the I and Q clock signals. The VNA IC can provide S-parameter measurements to a processing unit for further processing and/or analysis to compute the DUT S-parameters. | 04-29-2010 |
| 20110037485 | COVERING AND SEALING FILM FOR A PACK AND A METHOD FOR DETERMINING THE OPENING STATE OF A PACK - The invention concerns a covering and/or sealing film for a pack, in particular a blister pack, configured to seal at least one filling product chamber and allow opening access to the filling product chamber by separation and/or tearing, wherein the film, in particular in the area of the filling product chamber, has a predetermined electrical conductance property (C | 02-17-2011 |
