Class / Patent application number | Description | Number of patent applications / Date published |
324119000 | With rectifier (e.g., A.C. to D.C.) | 28 |
20080218154 | Integrated energy metering system - An integrated energy metering system having an energy meter including a voltage ADC for sensing voltage, a current ADC for sensing current, a microcontroller; a first memory device for storing program data for the energy meter; and a plurality of circuit blocks; a voltage monitor for monitoring a primary power supply; a power supply switch circuit for selectively applying one of the primary and auxiliary power supplies to the energy meter; and a system controller responsive to the voltage monitor for operating the switch circuit to apply the auxiliary power supply when the primary power supply voltage decreases below a predetermined level and gating the power to a first class of circuit blocks in the energy meter and applying power continuously to a second class of circuit blocks. | 09-11-2008 |
20080309320 | NEGATIVE VOLTAGE DETECTION CIRCUIT FOR SYNCHRONOUS RECTIFIER MOSFET - A negative voltage detection circuit for a synchronous rectifier metal oxide silicon field effect transistor (MOSFET). The circuit comprises a reference current source, a first circuit mirroring a first current based upon the reference current source and generating a first voltage based upon a detection voltage, a second circuit mirroring a second current based upon the reference current source and generating a second voltage, and a comparator having input ends to receive the first voltage and the second voltage, wherein a level of an output voltage of the comparator changes when the detection voltage is equivalent to a value predetermined according to a difference between the first current and the second current. | 12-18-2008 |
20090027039 | POWER SUPPLY - A power supply is for receiving an AC voltage and outputting a DC voltage and an output current to an electronic device. The power supply includes an input module, an output module, a measuring interface, a measuring interface, and a switch module. The input module is for receiving the AC voltage. The output module is for outputting the DC voltage and the output current to the electronic device. The measuring interface is for electrically contacting with a part of the electronic device. The measuring module is for measuring the DC voltage, the output current, and a voltage and a current of the part of the electronic device. The switch module is for choosing one of the output module and the measuring interface to be electrically connected to the measuring module. | 01-29-2009 |
20090102456 | Electrical Power Metering Device and Method of Operation Thereof - A metering device for metering energy delivered to customers over electrical wires from a power distribution cabinet. The metering device has a plurality of current transformers, each capable of receiving one of the electrical wires and connections for the line voltages which drive the wires. The current transformers are arranged for physical correspondence to the power outputs of the power distribution cabinet. Circuitry connected to the current transformers and line voltage connections meter the energy over the electrical wires. | 04-23-2009 |
20090115400 | Status indicator - The sensitivity and accuracy of a status indicator for sensing a current in an electrical circuit is improved by shifting the reference level of the transformer output to maximize the input signal to a precision voltage detector and by reducing the hysteresis of the status indicator by balancing the burden of the current transformer during the positive and negative alternations of the AC signal and by driving secondary loads with a voltage to current converter. | 05-07-2009 |
20090315538 | SIGNAL GENERATING CIRCUIT FOR DETECTING GROUND STATUS - A signal generating circuit for detecting ground status includes a power supply input unit (A), a step down rectified power supply or DC power supply unit (C) in series. The DC power supply required by a signal detection and process unit (D) is obtained by the power supply input unit (A) passing through the step down DC power supply unit (C), and then a ground status signal is obtained and outputted via a resistor unit (B) and the signal detection and process unit (D) connected in turn. | 12-24-2009 |
20100013457 | Power Line Takeoff Clamp Assembly - In a power line takeoff clamp assembly and method of use thereof an electrical power distribution line is clamped to a body of the clamp assembly. A power takeoff supported by the body clamped to the power line generates direct current from alternating current flowing in the power line. One or more sensors supported by the body clamped to the power line sense one or more values related to an electrical current flowing in a power line. A wireless transceiver supported by the body clamped to the power line communicates data regarding the one or more sensed values. Each sensor and the wireless transceiver utilize direct current generated by the power takeoff for the operation thereof. | 01-21-2010 |
20110025300 | ELECTRICAL POWER QUALITY TEST CIRCUITRY AND METHOD - Electrical power quality test circuitry for testing response of an electrical device to input power disturbances is provided. The test circuitry includes a power structure having a rectifier configured to convert incoming AC voltage to DC voltage on a DC bus, and a power inverter configured to convert DC voltage from the bus to three-phase output AC voltage applied to the electrical device. The test circuitry also includes a control circuit configured to apply control signals to at least the power inverter to emulate at least one of a change in the amplitude of at least one phase of the output AC voltage at least one phase angle of at least one phase of the output AC voltage, and a frequency change for all phases of the output AC voltage. | 02-03-2011 |
20110043189 | Method for the Secure Acquisition of Multiple Analog Input Signals, Analog Input Circuit, and Measuring Sensor and Measuring Transducer Having an Analog Input Circuit of This Type - A method for securely acquiring multiple analog input signals that are converted using a plurality of A/D converters into corresponding digital single measured values. A first measurement averaging cycle having a predetermined total number of measuring intervals is predetermined by a higher-order control unit. First and second input signals are acquired by first and second A/D converters in a first and second number of measuring intervals, the second number being smaller than the first number. The first and second input signals are averaged to form first and second measured values, respectively. The first input signal is acquired by the second A/D converter in a third number of measuring intervals as at least one further single measured value. A message is output if a deviation of the at least one further single measured value from a single measured value of the first input signals measured by the first A/D converter or from the first measured values averaged up to that point exceeds a maximum permissible absolute value of the deviation. | 02-24-2011 |
20110084689 | Circuit, system and/or method for detecting an electrical connection between an electrical device and a power supply - A circuit, a system and/or a method detect a passive electrical connection and/or an active electrical connection between an electrical device and a power supply. An integrity of the electrical connection between the electrical device and the power supply is monitored to determine if the electrical device may have access to power and/or to determine if the electrical device may be secure while on display. A high frequency AC signal is modulated onto a positive power rail between the electrical device and the power supply. Capacitance circuitry of the electrical device may remove the high frequency signal from the positive power rail. An absence of the high frequency signal on the positive power rail indicates that the electrical connection exists between the electrical device and the power supply. A presence of the high frequency signal on the positive power rail indicates that the electrical connection does not exist between the electrical device and the power supply. | 04-14-2011 |
20110084690 | APPARATUS FOR MEASURING RF VOLTAGE FROM A QUADRUPOLE IN A MASS SPECTROMETER - An apparatus for measuring RF voltage from a quadrupole in a mass spectrometer are provided. The apparatus comprises at least one rectifying diode circuit for rectifying the RF voltage of the quadrupole to produce a rectified RF voltage. The apparatus further comprises at least one operational amplifier configured as a current to voltage converter, a negative input of the at least one operational amplifier connected to the output of at least one diode in the at least one rectifying diode circuit, a positive input of the at least one operational amplifier at ground, and an output of the at least one operational amplifier in a feedback look with the negative input, to reduce reverse leakage current from the at least one diode. | 04-14-2011 |
20110109301 | Device And Method For Measuring Current And Power In A Plug Or Receptacle - An aspect of the present disclosure relates to an electrical receptacle configured to receive a plug having two or more prongs and capable of being connected to an associated load. The electrical receptacle may include a housing and a housing cover mounted on the housing including apertures for receiving at least one of the prongs. In addition, the receptacle may include at least two electrical contacts for engaging the prongs positioned in the housing, a magnetic current sensor defining an opening, wherein the magnetic current sensor opening is operatively coupled to an opening defined by at least one of the apertures. Wherein when one of the prongs is inserted through one of the apertures, the prong extends to through the magnetic current sensor and engages at least one of said electrical contacts. | 05-12-2011 |
20110187349 | DETECTOR CIRCUIT AND SEMICONDUCTOR DEVICE USING SAME - A detector circuit for detecting degradation in the distortion characteristics of a power amplifier based on signals from both ends of a coupled line of a directional coupler. The detector circuit includes a phase shifter/attenuator for phase shifting and attenuating a signal from a coupled terminal of the coupled line, a differential amplifier for outputting difference between an output signal from the phase shifter/attenuator and a signal from the isolated terminal of the coupled line, a wave detector circuit for converting the difference into a DC signal, and a comparing circuit for determining whether the voltage level of the DC signal exceeds a predetermined level. When degradation in the distortion characteristics of the power amplifier arises, the phase shifter/attenuator phase shifts the signal from the coupled terminal and outputs a signal 180° out of phase with the signal from the isolated terminal. | 08-04-2011 |
20110248702 | CURRENT DETECTION CIRCUIT INCLUDING ELECTROSTATIC CAPACITOR AND RECTIFYING ELEMENT FOR INCREASING GATE VOLTAGE OF PROTECTING MOSFET - Using a electrostatic capacitor and a diode, a gate voltage of a protecting MOSFET is increased when a drain voltage of a power transistor increases. A voltage clamp circuit clamps the maximum voltage of the gate voltage of the protecting MOSFET to a predetermined clamp voltage. A voltage control circuit controls a drain voltage of a sense transistor so as to substantially coincide with a source voltage of the protecting MOSFET. | 10-13-2011 |
20120126790 | SYSTEM AND METHOD FOR PROVIDING POWER TO A POWER METER CONNECTED TO A POWER LINE - The disclosure relates to a meter for monitoring usage of power provided by a power transmission system to a site. The meter comprises: a meter module connected to a power feed associated with the power transmission system to provide readings relating to the power; a messaging module to provide messages to the power transmission system; a connection to an alternating current (AC) power supply; a rectifier circuit connected to the AC power supply to generate a direct current (DC) power signal; a capacitive circuit connected to an output of the rectifier circuit, the capacitive circuit including a capacitor for storing a voltage for temporarily providing replacement power for the rectifier circuit; and a switching regulator circuit connected to the output of the rectifier circuit and the capacitive circuit, the switching regulator converting the DC voltage signal to a stepped down voltage signal for the meter module. | 05-24-2012 |
20120153934 | VOLTAGE AND CURRENT SAMPLING DEVICE - A voltage and current sampling device, including a box, a current transformer, and a voltage acquisition unit, including a voltage collection sub-unit, and a voltage/frequency conversion sub-unit. The current transformer is disposed in the box. A phase line passes through the center of the current transformer. The current transformer outputs a current signal via a current signal output end. The voltage collection sub-unit is disposed on the phase line whereby acquiring a real-time voltage signal and converting the real-time voltage signal into a first voltage sampling signal. The voltage/frequency conversion sub-unit is connected to the voltage collection sub-unit whereby converting the first voltage sampling signal into a first frequency signal. | 06-21-2012 |
20120293161 | ALTERNATING CURRENT VOLTAGE DETECTION CIRCUIT - An AC voltage detection circuit includes a conversion module, a comparison module, and a prompt module. The conversion module connects to an AC power source and converts the AC voltage provided by the AC power source to an AC current, and then converts the AC current to a direct current (DC) voltage reflecting the AC voltage. The comparison module is connected to the conversion module, and compares the DC voltage with a first predetermined voltage and a second lesser predetermined voltage, and produces a control signal when the DC voltage is greater than the first predetermined voltage or less than the second predetermined voltage. The prompt module produces a prompt signal when receiving the control signal. | 11-22-2012 |
20130082685 | FAST AC VOLTAGE DETECTOR - A fast AC voltage detector includes a bridge rectifier connected to an AC power source, a threshold detector connected to an output of the bridge rectifier, a voltage isolation circuit connected to the threshold detector, a continuous voltage averager connected to an output of the voltage isolation circuit, and a Schmidt trigger connected to the continuous voltage averager. The Schmidt trigger is operable to output a first voltage level when a load is preset on said AC power source and a second voltage level when no load is present on said AC power source | 04-04-2013 |
20130082686 | VOLTAGE MEASURING APPARATUS FOR BUCK CIRCUIT - A voltage measuring apparatus electrically connected to buck circuits includes the same number of RC circuits as there are buck circuits, an analog/digital (A/D) convertor, a controller, and a display unit. Each RC circuit is configured to be electrically connected in parallel with an inductor of one corresponding buck circuit. The A/D convertor selectively obtains an analog voltage of one of the buck circuits, and converts the analog voltage signal into a digital voltage signal. The controller controls the A/D convertor and receives the digital voltage signal from the A/D convertor. The display unit displays a decimal voltage value based on the digital voltage signal. | 04-04-2013 |
20130169268 | Schottky Diode Radio Frequency Detector Probe With Amplitude Linearity Compensation - A passive radio frequency probe that can detect low level RF signals is disclosed. Schottky diodes are used in the probe to convert alternating current (AC) signals to direct current (DC) signals on a one-to-one basis within a given tolerance. The probe is used with a DC voltmeter to permit measurements of radio frequency signals. | 07-04-2013 |
20130187634 | MONITORING DEVICE AND METHOD FOR MONITORING A LINE SECTION USING A MONITORING DEVICE - A monitoring device is provided that includes a first line section with a first connection point and a second connection point spaced apart from the first connection point in the direction of the line, and with a control unit and with a first current sensing unit, having a current source. A first switch is inserted into the first connecting line and connects the first current source to the first connection point or disconnects it therefrom. In a first state the first switch is closed and the first current is impressed on the first line section and a first voltage determined by the amplitude of the actual current, and in a second state the first switch is open and a second voltage is determined, and the control unit is configured to ascertain the amplitude of the first actual current from the two voltages. | 07-25-2013 |
20130328546 | Power Line Takeoff Clamp Assembly - In a power line takeoff clamp assembly and method of use thereof an electrical power distribution line is clamped to a body of the clamp assembly. A power takeoff supported by the body clamped to the power line generates direct current from alternating current flowing in the power line. One or more sensors supported by the body clamped to the power line sense one or more values related to an electrical current flowing in a power line. A wireless transceiver supported by the body clamped to the power line communicates data regarding the one or more sensed values. Each sensor and the wireless transceiver utilize direct current generated by the power takeoff for the operation thereof. | 12-12-2013 |
20140167737 | AC DETECTION CIRCUIT AND OPERATING METHOD THEREOF - There are provided an alternating current (AC) detection circuit and an operating method thereof. The AC detection circuit includes: a power supply unit outputting an AC signal; a filter unit connected to the power supply unit to block a serial signal component; and a detection circuit unit including at least one switching element turned on or turned off according to an output signal from the filter unit, and detecting whether the AC input signal has been input according to an operation of the at least one switching element. | 06-19-2014 |
20140253097 | System, Method, and Apparatus for a Safe Powerline Communications Instrumentation Front-End - A safe powerline communications instrumentation front end device including a voltage input for receiving a line voltage from a powerline, a voltage reducer for reducing the voltage of the line voltage, a filtering system for extracting a Power Line Communications (PLC) signal from the line voltage, and an analog output for outputting the PLC signal as an analog signal for communications test equipment | 09-11-2014 |
20140354265 | VOLTAGE SENSING CIRCUIT FOR CONVERTER - A voltage sensing circuit of a converter senses input and output voltages of a converter with only one sensing circuit. The voltage sensing circuit is capable of reducing the number of the components for a controller and the volume thereof to save cost, and detecting whether the discontinuous mode (DCM) is entered or not, thereby to apply a separate control algorithm thereto when the DCM is entered. | 12-04-2014 |
20140368190 | Branch Circuit Monitor - A branch circuit monitoring system (BCMS) for monitoring branch circuit currents in one or more electrical circuit panels is described. The system is comprised of a data center server, one or more panel processors, each with one or more collection devices, and one or more current sensors per collection device. The BCMS is designed to be installed entirely inside the panel without the need for a dedicated enclosure or power supply to facilitate ease of installation and low-cost. The BCMS also allows for future upgradability through standard software updates so that the system can be updated or patched easily. The BCMS data center server collects, aggregates, stores, and serves historical branch circuit current data from the panel processors to networked users via a web server to provide visualization of data such as tables, charts, and gauges. Finally, the BCMS interfaces to third-party software suites using industry-standard protocols such as Modbus® TCP and BACnet™ for integration with data center infrastructure management or building management system software. | 12-18-2014 |
20150022182 | MONITORING DEVICE AND METHOD FOR MONITORING A LINE SECTION USING A MONITORING DEVICE - A monitoring device is provided that includes a first line section with a first connection point and a second connection point spaced apart from the first connection point in the direction of the line, and with a control unit and with a first current sensing unit, having a current source. A first switch is inserted into the first connecting line and connects the first current source to the first connection point or disconnects it therefrom. In a first state the first switch is closed and the first current is impressed on the first line section and a first voltage determined by the amplitude of the actual current, and in a second state the first switch is open and a second voltage is determined, and the control unit is configured to ascertain the amplitude of the first actual current from the two voltages. | 01-22-2015 |
20160178675 | LOG-LINEAR POWER DETECTOR | 06-23-2016 |