Class / Patent application number | Description | Number of patent applications / Date published |
324107000 | Polyphase | 18 |
20090167291 | Method And Apparatus For Monitoring Voltage In A Meter Network - Methods and systems are provided for monitoring input voltages to meters that are in a wireless metering network. A plurality of entries can be created that include voltage-related information, such as a maximum input voltage or a minimum input voltage. Each meter can further determine whether the input voltage is beyond a predetermined threshold voltage for a duration that might indicate a voltage irregularity in the network. Each meter in the network can be monitored by a collector, which can communicate information to a data collection server. | 07-02-2009 |
20100148753 | Method to predict phase current - A phase current prediction method is disclosed. The phase current prediction method predicts current representative of a PWM period using a motor model which receives current measured through a single current sensor as an input, instead of the measured current, and determines the predicted current to be phase current. | 06-17-2010 |
20100164477 | HIGH SPEED VOLTAGE REGULATOR WITH INTEGRATED LOSELESS CURRENT SENSING - In general, in one aspect, the disclosure describes a high-speed multi-phase voltage regulator (VR) capable of sensing load current. For each phase leg, the VR includes a current mirror to mirror current in switching elements, a current sense to sense high side current in the current mirror, and a I-V converter to convert the sensed high side current to a voltage. The high side sensed current for each phase leg is averaged and the duty cycle for the VR is extracted. The average high side sensed current and the duty cycle are converted to digital by an A-D converter. Digital circuitry corrects the sensed current by adjusting for the gain and offset voltage of the VR. The adjusted sensed value is divided by the duty cycle to convert to load current and the average load current is multiplied by the number of phases operating to determine overall load current. | 07-01-2010 |
20110267032 | THREE-PHASE ELECTRIC ENERGY MEASUREMENT APPARATUS - This disclosure relates to a three-phase electric energy measurement apparatus, comprising: a voltage detection unit for detecting voltage of each phase in power transmitting lines where the voltage detection unit is; a current detection unit for detecting current of each phase in the power transmitting lines where the current detection unit is; an electric energy calculation unit, connected to said voltage detection unit and said current detection unit, for receiving signals outputted from said voltage detection unit and said current detection unit, and performing signal processing and calculation, and then outputting a calculation result; wherein both said voltage detection unit and said electric energy calculation unit are connected in a star connection mode, forming a common virtual ground. Through the above-mentioned grounding manner different from that in the prior art, a three-phase four-wire electric energy meter is formed using a three-phase three-wire connection method. As a result, devices required by the three-phase electric energy measurement apparatus are saved, thereby reducing manufacture costs, and meanwhile, measurement errors due to asymmetrical loads of three phases are eliminated, thereby improving the measurement accuracy. Besides this, detection of single-phase current and single-phase voltage can be realized. | 11-03-2011 |
20120056613 | METHOD AND DEVICE FOR THE DETECTION OF CURRENT ASYMMETRIES IN THREE-PHASE CIRCUITS | 03-08-2012 |
20120169323 | CONGRUENT POWER AND TIMING SIGNALS FOR DEVICE - Congruent power and timing signals in a single electronic device. In an embodiment, a circuit may include just one isolation transformer operable to generate a power signal and a timing signal. On the secondary side, two branches may extract both a power signal and a clock signal for use in the circuit on the isolated secondary side. The first branch may be coupled to the transformer and operable to manipulate the signal into a power signal, such as a 5V DC signal. Likewise, the second circuit branch is operable to manipulate the signal into a clock signal, such as a 5 V signal with a frequency of 1 MHz. By extracting both a power supply signal and a clock signal from the same isolation transformer on the secondary side, valuable space may be saved on an integrated circuit device with only having a single winding for a single isolation transformer. | 07-05-2012 |
20120286769 | CURRENT SENSING DEVICE FOR A MULTI-PHASE SWITCHED VOLTAGE REGULATOR - A current sensor includes input modules each including an amplifier having a first input coupled to a respective winding of a regulator; a transistor having a control input coupled to the amplifier output, a first terminal coupled to a second input of the operational amplifier, and a second terminal configured to provide a sense current representing an unbalance of a phase current with respect to an average current of a winding; a current generator configured to bias the transistor; and an output resistor coupling the first terminal to an intermediate node. An output stage includes an output amplifier having a first input coupled to the intermediate node, and an output transistor having a control terminal coupled to the output amplifier output, a first terminal coupled to a second input of the output amplifier, and a second terminal providing another sense current representing a total current of the regulator. | 11-15-2012 |
20130271114 | FREQUENCY PHASE DETECTION THREE PHASE SYSTEM - A system, method, and apparatus are described for monitoring the operation of a three phase system. In some embodiments, one or more vectors may be generated. The vectors may be indicative of an output of the three phase system. In some embodiments, one or more of the vectors may correspond to a difference of two of the three phases of the three phase system. A gain associated with a third of the vectors may be different from a gain associated with each of the first and the second vectors. The gain associated with the third vector may be maximized. The three vectors may be combined with hardware or software. In some embodiments, frequency content associated with the three phase system may be filtered with hardware or software. For example, filtering may be used to remove frequencies outside of a specified frequency range of interest. | 10-17-2013 |
20140184198 | POWER METER WITH AUTOMATIC CONFIGURATION - A power monitoring system includes a plurality of current sensors suitable to sense respective changing electrical current within a respective conductor to a respective load and a conductor sensing a respective voltage potential provided to the respective load. A power monitors determines a type of circuit based upon a signal from at least one of the current sensors and a signal from the conductor, wherein the type of circuit includes at least one of a single phase circuit, a two phase circuit, and a three phase circuit. The power meter configures a set of registers corresponding to the determined type of circuit in a manner such that the configuring is different based upon each of the single phase circuit, two phase circuit, and three phase circuit suitable to provide data corresponding to the determined type of circuit. | 07-03-2014 |
20140300344 | Power Monitoring Systems and Methods - The present disclosure is a system for monitoring power that has a unified polyphase distribution transformer monitoring (PDTM) device that interfaces with at least three electrical conductors electrically connected to a transformer. In addition, the PDTM device measures a current and a voltage of each of the three electrical conductors. Additionally, the system has logic that calculates values indicative of power corresponding to the transformer based upon the currents and the voltages measured and transmit data indicative of the calculated values. | 10-09-2014 |
20150042311 | METHOD AND APPARATUS TO DIAGNOSE CURRENT SENSOR POLARITIES AND PHASE ASSOCIATIONS FOR A THREE-PHASE ELECTRIC POWER SYSTEM - A system for a three-phase electric power system includes a plurality of voltage sensors sensing three-phase voltages of the three-phase electric power system; a plurality of current sensors sensing three-phase currents of the three-phase electric power system; and a number of analog-to-digital converters converting the sensed three-phase voltages and the sensed three-phase currents of the three-phase electric power system to corresponding digital values. A processor calculates from the corresponding digital values at least two phase angles between voltage and current for at least two of three phases of the three-phase electric power system, diagnoses polarities and phase associations for at least two of the current sensors based on, for each of the at least two current sensors, a predetermined wiring configuration of the three-phase electric power system and a corresponding one of the at least two phase angles being within a corresponding predetermined angular range, and outputs corresponding diagnosis results. | 02-12-2015 |
20150377939 | DETERMINING DEVICE, DETERMINING METHOD, AND PROGRAM - A voltage/current verifier computes, for each phase, a phase difference between phase voltage and phase current from the phase of phase voltage and the phase of phase current computed for each phase by a phase acquirer, and determines conformity if all of the computed phase differences are within a preset range. A current/current verifier computes phase differences between phase currents from the phase of phase current computed for each phase by the phase acquirer, and determines conformity if all of the computed phase differences are less than 180°. A reporting device reports that a current transformer is incorrectly placed on a power line unless both the voltage/current verifier and the current/current verifier do not determine conformity. | 12-31-2015 |
20160011243 | System and Method for Monitoring a Three-Phase Network | 01-14-2016 |
20160187400 | BI-DIRECTIONAL ELECTRIC ENERGY METER - An electric energy meter for a poly-phase electricity network includes a power transformer having a primary side and a secondary side, a first analog front end (AFE) unit is coupled to the secondary side of the power transformer, and a microcontroller coupled to the primary side of the power transformer. The first AFE unit is to be coupled to a first phase of the poly-phase electricity network. The microcontroller is configured to transmit a digitized request signal to, and to receive a measurement signal from, the first AFE unit via the power transformer. More specifically, the first AFE unit, upon receiving the digitized request signal, is to extract information from the digitized request signal. | 06-30-2016 |
20190146015 | VI HEARTBEAT FUNCTIONALITY | 05-16-2019 |
324108000 | Positive, negative or zero sequence | 3 |
20100315063 | METER DEVICE AND METHOD OF TESTING A CUT NEUTRAL CONDUCTOR - A meter device for checking the measurements of an electrical meter, such as that used by electrical utilities is provided. The meter device has a base with electrical phase conductors arranged to couple with a meter socket. A housing is attached to the base. Electrical connectors are arranged on the end of the phase conductors within the housing. The electrical connectors are arranged to couple with an electrical meter. One or more lead conductors is also provided. Each lead conductor has a first end coupled to the electrical connector and a second end coupled to the associated phase conductor. Each lead conductor includes a middle portion arranged outside of the housing. | 12-16-2010 |
20140368187 | CONTROL CIRCUIT, AND POWER GENERATION DEVICE HAVING THE SAME - A control circuit 1 for determining a phase sequence of a power generator includes a frequency control unit, a cycle obtaining unit, a determination unit, and an output-supply control unit. The frequency control unit controls a frequency of a sensor signal synchronous with an operation of the power generator, and the cycle obtaining unit obtains a cycle of the sensor signal whose frequency is controlled by the frequency control unit. The determination unit determines the phase sequence of the power generator by detecting timing at which an output voltage outputted from each of the phases of the power generator has risen using the cycle of the sensor signal obtained by the cycle obtaining unit. The output-supply control unit controls a drive circuit according to the phase sequence of the power generator determined by the determination unit. | 12-18-2014 |
20160091538 | POWER MEASUREMENT DEVICE, DETERMINATION METHOD, AND PROGRAM - A power measurer measures, for each current transformer CT, electric energy supplied to equipment or electric energy supplied from the equipment based on a current measured by a current measurer and a voltage measured by a voltage measurer. A sign memory stores, for each current transformer CT, information indicating whether the electric energy measured by the power measurer when the current transformer CT is disposed in a correct direction on a power line shows a positive sign or a negative sign. A determiner determines that, when the sign stored in the sign memory differs from the sign of the electric energy measured by the power measurer, the current transformer CT is disposed in an incorrect direction on the power line. | 03-31-2016 |