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US20120063900 METHOD FOR EXAMINING AN ELECTRIC ENERGY ACCUMULATOR  
The invention relates to a method for examining an electric energy accumulator (31) for a blade angle adjustment drive (14) of a wind turbine (1), comprising an inverter (21), at least one...
US20130314101 Presence and Operability Test of a Decoupling Capacitor  
Electronic device (101) comprising a power source (110), a power management unit (102) coupled to the power source, and a set of loads (103a, 103b, 103c, 103d), the power management unit...
US20120153965 DC CAPACITOR DEGRADATION ALARM CIRCUIT  
A DC capacitor degradation alarm circuit is a capacitor degradation detection device including two filter circuits and a degradation detection element. The two filter circuits, which receive a...
US20080284350 BULB TYPE DETECTOR FOR DIMMER CIRCUIT AND INVENTIVE RESISTANCE AND SHORT CIRCUIT DETECTION  
A bulb detection circuit is associated with a dimmer circuit for a lighting system. The bulb detection circuit is operable to detect whether an incandescent or a fluorescent bulb is received in an...
US20110241695 METHODS AND SYSTEMS FOR MONITORING CAPACITOR BANKS  
A method of monitoring a capacitor bank comprising a plurality of capacitor strings connected in parallel, each capacitor string comprising a plurality of capacitors connected in series is...
US20120161781 MEASUREMENT CIRCUIT FOR CAPACITOR  
A measurement circuit includes a switch unit with a number of keys selectively pressed to output different resistance regulating signals. A resistance setting circuit receives the resistance...
US20110199094 Gas Sensor Age Compensation and Failure Detection  
A method, system (100), and computer program product for age compensation for a gas sensor (101) are provided. The method includes determining an impedance spectrum for the gas sensor (101) by an...
US20120049857 Programmable Gain Trans-Impedance Amplifier Overload Recovery Circuit  
Embodiments of an apparatus for measuring the leakage current of capacitive components is taught. One embodiment includes a first stage amplifier configured to receive an input from a...
US20140002104 APPARATUS FOR DIAGNOSING DC LINK CAPACITOR OF INVERTER  
The present disclosure relates to an apparatus for diagnosing a DC link capacitor. A DC voltage provided from a power supplier to a motor is controlled to have a predetermined level (or...
US20100026313 Capacitance Structures for Defeating Microchip Tampering  
Apparatus, method and program product may detect an attempt to tamper with a microchip by detecting an unacceptable alteration in a measured capacitance associated with capacitance structures...
US20110291665 TIMER CIRCUIT  
A timer circuit is provided with a comparator CMP1, a control unit and a comparator CMP2. The comparator CMP1 compares a potential of the capacitance element with the potential of a reference...
US20120268413 IN-SITU DETECTION OF TOUCHSCREEN PANEL SHORTS  
A test system for testing a capacitive-sense touchscreen is disclosed. Specifically, the test system may be incorporated within a controller that is also used to control operations of the...
US20150177306 Validation of Capacitor Bank Operation  
A system for validating an operation of a capacitor bank is disclosed. The system can include a first capacitor of the capacitor bank electrically coupled to a first power line. The system can...
US20120013347 CAPACITOR MONITORING SYSTEMS AND METHODS OF METERING AND MONITORING CAPACITOR BANK  
The present invention relates to a capacitor bank monitoring system for monitoring the status of a capacitor bank in a power distribution system. The capacitor bank monitoring system includes a...
US20090251011 Medium Voltage Circuit Breaker With Capacitor Bank Supervisor  
A Medium Voltage Circuit Breaker that has at least a pair of contact mutually coupleable and uncoupleable to carry out an opening/closing operation, a magnetic actuator operatively connected to at...
US20140015542 MEASUREMENT CIRCUIT FOR LEAKAGE CURRENT OF CAPACITOR  
A measurement circuit includes an instruction input unit, a charging circuit to charge a capacitor, a charging and discharging circuit to control the capacitor to leakage discharge, a control...
US20110062962 Topology Surveying a Series of Capacitors  
A topology for surveying the integrity of a plurality of capacitors connected in series between a pair of bus lines arranged to be connected to a DC-power source comprises a plurality of resistors...
US20150263600 FILTER CAPACITOR DEGRADATION IDENTIFICATION USING COMPUTED POWER  
Methods and apparatus are presented for detecting filter capacitor degradation in a power converter in which filter circuit branch currents and voltages are concurrently measured, nominal and...
US20130002263 RELIABILITY ASSESSMENT OF CAPACITOR DEVICE  
A method of reliability testing of a semiconductor device is described. The embodiment, includes providing a capacitor including an insulating layer interposing two conductive layers. A plurality...
US20130241591 Apparatus and Method for Screening Electrolytic Capacitors  
A method for screening electrolytic capacitors places a capacitor in series with a resistor, applying a test voltage and following the charge curve for the capacitor. A high voltage drop across...
US20130093400 MAXIMIZING LIFE OF CAPACITORS IN SERIES MODULES  
A device (1) monitors and/or balances an ultracapacitor (3) and/or a module (4) comprising a plurality of ultracapacitors (3) connected in series, the module (4) being connectable in series or in...
US20100295554 METHOD FOR MONITORING THE CONDITION OF THE CAPACITORS OF A DC-VOLTAGE INTERMEDIATE CIRCUIT  
Method and system for monitoring the condition of the capacitor arrangement (14-16) of the DC-voltage intermediate circuit of a power electronics appliance, such as of a frequency converter, at...
US20120194202 DRIVE FAILURE PROTECTION  
The present techniques include methods and systems for detecting a failure in a capacitor bank of an electrical drive system. Embodiments include using discharge resistors to discharge capacitors...
US20130204554 SYSTEMS, METHODS, AND DEVICES FOR MONITORING A CAPACITOR BANK  
Systems, methods, and devices for monitoring one or more capacitor banks are presented herein. One concept of the present disclosure is directed to a method of monitoring at least one capacitor...
US20120153964 SYSTEM AND METHOD FOR DETECTING ISOLATION BARRIER BREAKDOWN  
A circuit system includes a first circuit for receiving an input signal, a second circuit for interfacing with a user, a signal path connecting the first circuit to the second circuit, the signal...
US20080284449 Power converters with component stress monitoring for fault prediction  
A power converter includes a controller and at least one circuit component. The controller is configured for monitoring stress on the circuit component during operation of the power converter and...
US20080088318 Method to test transparent-to-test capacitors  
An inexpensive process for verifying that a capacitor, which would be difficult to detect using in-circuit testing techniques if the capacitor were a conventional two-terminal capacitor, has been...
US20140159742 INPUT DEVICE TRANSMITTER PATH ERROR DIAGNOSIS  
A processing system configured for capacitive sensing comprises transmitter circuitry, a first internal diagnostic mechanism, and a determination module. The transmitter circuitry is coupled with...
US20130057297 METHOD AND APPARATUS FOR DETECTING POWER CONVERTER CAPACITOR DEGRADATION USING NEGATIVE SEQUENCE CURRENTS  
Power converters and control techniques are presented in which capacitor degradation is detected according to negative sequence current by computing an uncompensated negative sequence current and...
US20080200748 CAPACITOR FAILURE DETECTION  
The inventive technique includes methods, devices and computer-readable media for monitoring a magnetic device. One such device includes a magnetic core for generating a magnetic field, a power...
US20150241503 FILTER CAPACITOR DEGRADATION IDENTIFICATION USING COMPUTED CURRENT  
Methods and apparatus are presented for detecting filter capacitor degradation in a power converter in which filter circuit branch currents and voltages are concurrently measured, nominal current...
US20150194273 CAPACITIVE ENERGY-STORAGE FOR A MOBILE WORKING MACHINE  
A capacitor module includes a capacitor element (101), a first voltage terminal (102) connected to a first pole of the capacitor element, and a second voltage terminal (103) connected to a second...
US20120133374 METHOD FOR DETECTING CAPACITOR LOSS  
A method for detecting a capacitor loss is applicable to detecting a plurality of by-pass capacitors connected in parallel to each other. The detection method includes the following steps, an...
US20130298699 SEPARATION MODE CAPACITORS FOR SENSORS  
A capacitor for use in sensors includes opposed first and second capacitor plates, wherein the second capacitor plate is mounted to the first capacitor plate by a flexible attachment. The flexible...
US20130268217 METHOD AND APPARATUS FOR DETECTING ABNORMALITY OF A CAPACITOR  
The present disclosure provides a capacitor abnormality detection method and detection apparatus for accurately detecting an abnormality of an individual capacitor in a circuit in which two or...
US20140114592 OPERATIONAL MONITORING OF ELECTROCHEMICAL CAPACITORS  
The invention provides operational monitoring for electrochemical capacitors and, more specifically, the monitoring of operational performance characteristics of electrochemical capacitors using...
US20150130273 DC LINK CAPACITANCE MEASUREMENT FOR ELECTRIC VEHICLE DRIVETRAIN  
In order to detect deterioration of a DC link capacitor between a DC source and an inverter load in an electric propulsion vehicle, capacitance of the link capacitor must be accurately measured...
US20130187664 APPARATUS AND METHOD FOR DIAGNOSTICS OF A CAPACITIVE SENSOR  
In at least one embodiment, an apparatus for diagnosing a state of a capacitive sensor is provided. The apparatus includes a control unit for being operably coupled to a decoupling device that...
US20150160299 POWER SUPPLY APPARATUS AND POWER SUPPLY DEGRADATION DIAGNOSIS METHOD  
A power supply apparatus includes a first electric accumulator, a second electric accumulator, and a control section which controls charge and discharge of the first electric accumulator and the...
US20090237088 METHOD FOR INSPECTING INSULATION PROPERTY OF CAPACITOR  
A method for inspecting insulation property of a capacitor, comprises the steps of: applying a DC voltage V1 higher than a voltage V0 to a capacitor to be inspected, in which the voltage V0 is...
US20120153966 APPARATUS FOR DETECTING FAULT OF FLYING CAPACITOR OF INSULATED CONDITION DETECTING UNIT  
An apparatus for detecting a fault of a flying capacitor of an insulated condition detecting unit measures (step S1), at the start of discharge of the flying capacitor, a discharge voltage of the...
US20110018551 METHOD AND DEVICE FOR DETERMINING DEGRADATION STATE OF ELECTRICAL STORAGE DEVICE IN HYBRID CONSTRUCTION EQUIPMENT  
The degradation of an electrical storage device 30 such as a capacitor can be determined by a system which is not an external device but is installed in hybrid construction equipment 1 in a state...
US20080290879 CAPACITIVE MEASUREMENTS WITH FAST RECOVERY CURRENT RETURN  
An apparatus and method for measuring the leakage current of capacitive components. A switch that grounds a terminal of a component being tested is closed while the component is charged to a...
US20100188099 APPARATUS AND METHOD FOR SCREENING ELECTROLYTIC CAPACITORS  
A method for screening electrolytic capacitors places a capacitor in series with a resistor, applying a test voltage and following the charge curve for the capacitor. A high voltage drop across...
US20150198647 ON-CHIP TEST FOR INTEGRATED AC COUPLING CAPACITORS  
Apparatus, method and computer program product for determining presence and relative magnitudes of on-chip AC coupling capacitors in a high-speed differential receiver device. A BIST method is...
US20150177287 CAPACITOR FAILURE  
A circuit is arranged to detect a voltage imbalance indicative of component failure and, upon such detection, convey an optical signal to indicate that a component appears to have failed.
US20120271572 VARIABLE FREQUENCY DRIVE AND METHODS FOR FILTER CAPACITOR FAULT DETECTION  
Variable frequency motor drives and control techniques are presented in which filter capacitor faults are detected by measuring filter neutral node currents and/or voltages and detecting changes...
US20110292696 VARIABLE FREQUENCY DRIVE AND METHODS FOR FILTER CAPACITOR FAULT DETECTION  
Variable frequency motor drives and control techniques are presented in which filter capacitor faults are detected by measuring filter neutral node current and/or voltages and detecting changes in...
US20100004885 DEVICE AND METHOD FOR DETECTING ABNORMALITY OF ELECTRIC STORAGE DEVICE  
Provided is an abnormality detecting device for detecting an abnormality of electric storage devices such as a battery pack. Comparators (140-1) to (140-n) detect a time when a voltage reaches a...
US20090072839 Apparatus and method to detect failure of smoothing electrolytic capacitor  
An apparatus and method to detect failure of an electrolytic capacitor that smoothes a DC voltage in an inverter circuit. The apparatus detects failure of a smoothing electrolytic capacitor in a...

Matches 1 - 50 out of 75 1 2 >