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9019674 Input power port protection component  
In one general aspect, an apparatus can include an overvoltage protection portion, and an overcurrent protection portion operably coupled to the overvoltage protection portion such that heat...
9007736 Power module  
A power module includes a current sensing circuit in which a transistor includes an emitter connected to a sense emitter of a current sense element of an IGBT and a base connected to ground, a...
8964338 System and method for compressor motor protection  
A system includes a refrigerant compressor including an electric motor, a current sensor that measures current flow to the electric motor, a switching device configured to close and open to allow...
8861164 Integrated overdrive and overvoltage protection device  
In one general aspect, an apparatus can include an overcurrent protection device. The apparatus can include an overvoltage protection device coupled to the overcurrent protection device and...
8861156 Status providing starter apparatus, system, and/or method  
A method, system, and/or apparatus is described for controllably providing operating power to, and indicating proper operating status of, a load. Novel functionality can be provided via discrete...
8854781 Power supply device for plasma processing  
A power supply device for plasma processing, wherein electric arcs may occur, comprises a power supply circuit for generating a voltage across output terminals, and a first switch connected...
8854780 Protection circuit of battery pack and battery pack using the same  
A programmable protection circuit of a battery pack and a battery back are disclosed. The protection circuit includes programmable protection level specifications based on battery characteristics...
8848329 Position detecting device  
A high-side output transistor and a low-side output transistor of an output circuit control voltages of conductors, which connect a power supply terminal and ground, and outputs a voltage signal...
8848327 Controller, controlling method, and solar cell  
Disclosed is a controller for controlling short-circuit across positive and negative terminals of a dye sensitized solar cell for converting a light energy into an electrical energy. The...
8837100 Power supply device for plasma processing  
A power supply device for plasma processing, wherein electric arcs may occur, comprises a power supply circuit for generating a voltage across output terminals, and a first switch connected...
8823356 Supply voltage auto-sensing  
Processes, machines, and articles of manufacture that may serve to enable the detection or determination of alternating line voltages from an alternating power source, such as the power grid, are...
8797707 Systems and methods of power conversion for electrostatic precipitators  
The disclosed technology describes methods and apparatus to convert and control power provided to a precipitator. An example embodiment of the disclosed technology includes a method for providing...
8792220 Power source protection circuit including over-voltage protector and over-current protector  
A protection circuit includes a first input, an over-voltage protector, an over-current protector, and a first output connected in series in that order. The first input is configured for receiving...
8786991 Automated three phase power monitoring system  
Embodiments of the invention relate to automated three phase power monitoring systems. Embodiments of the invention include a zero crossing activated switch having an overload condition signal...
8760832 Load circuit protection device  
To provide a protection circuit for a load circuit which can distinguish between an overcurrent generated at a load and a rush current generated at the time of turning on a semiconductor switch or...
8749933 Fault protection of HVDC transmission lines  
A protection system for high voltage direct current, HVDC, transmission lines is provided. The protection system includes a direct current, DC, bus, a device configured to connect an HVDC...
8705216 High sensitivity leakage current detection interrupter  
A high sensitivity leakage current detection interrupter (LCDI) includes a shielded wire, a current leakage detection unit, and a tripping mechanism. A live core and a neutral core of the shielded...
8687331 Protection to avoid abnormal operation caused by a shorted parameter setting pin of an integrated circuit  
For a system to avoid abnormal operation caused by a shorted parameter setting pin of an integrated circuit, a protection apparatus and method apply a buffered reference voltage to the parameter...
8688283 Method and system for power quality protection  
A method for power quality protection includes measurement of electrical and nonelectrical parameters, calculation of additional electrical and nonelectrical parameters, comparison of the value of...
8686738 Electrical safety devices and systems for use with electrical wiring, and methods for using same  
Disclosed are systems and methods for monitoring an electrical wire. A safety device utilized to monitor the wire may include at least one current sensing device, at least one voltage sensing...
8687332 Transistor circuit with protecting function  
The present invention provides a transistor circuit with protecting function. The transistor circuit includes a transistor, a voltage detecting unit, a current detecting unit, a temperature...
8675326 Bidirectional switch and charge/discharge protection device using same  
A bidirectional switch device, has: a bidirectional switch having a HEMT; and a control circuit which, during a first condition, applies a first voltage lower than a threshold voltage across a...
8675327 Fast impedance protection technique immune to dynamic errors of capacitive voltage transformers  
The present invention relates to methods for providing impedance protection differentiating between in-zone and out-of-zone faults based on instantaneous, digitally derived operating and...
8649139 Methods, systems, and apparatus for detecting arc flash events using current and voltage  
A power circuit protection system includes a current sensor configured to measure a first current level through a conductor of the circuit, a voltage sensor configured to measure a first voltage...
8648572 Protection circuit and battery pack  
A protection circuit having: a connecting terminal which is connected to an external circuit and which inputs and outputs a charging/discharging current of a secondary battery to and from the...
8649140 Voltage activated 2nd level safety circuit for permanent isolation  
A voltage activated 2nd level safety circuit for permanent isolation having a current activated fuse useful for class III medical devices, military applications, and any other passive loads. The...
8587911 Service line safety monitor  
A service line safety monitor which may be configured as a separate module or incorporated into an EVSE is adapted to monitor the connection with the service line to determine whether there is a...
8581608 Apparatus and method for detecting abnormality in solar cell power generation system  
The present invention provides an apparatus for easily detecting an abnormal status of power generation of a solar cell panel in a solar cell power generation system having the power generation of...
8575879 Methods, systems and apparatus for controlling a multi-phase inverter  
Embodiments of the present invention relate to methods, systems, a machine-readable medium operable in a controller, and apparatus for controlling a multi-phase inverter that drives a multi-phase...
8542471 Power supply device for plasma processing  
A power supply device for plasma processing, wherein electric arcs may occur, comprises a power supply circuit for generating a voltage across output terminals, and a first switch connected...
8526155 Phase-control switchgear and phase-control method for switchgear  
A phase-control switchgear includes a circuit breaker, a phase difference detection unit, a storage unit, and a circuit breaker control unit. The phase difference detection unit detects a phase...
8472157 Overvoltage and overcurrent protection circuit  
An overvoltage and overcurrent protection circuit includes a connection jack, an overvoltage protection switch connected to the connection jack, an overcurrent protection switch, a voltage...
8465859 Current sensor  
A current sensor includes a magnetic balance sensor and a switching circuit. The magnetic balance sensor includes a feedback coil which is disposed near a magnetic sensor element varying in...
8456119 Driving device of brushless DC motor for fan and driving method thereof  
A driving device of a brushless DC motor for a fan includes a protection circuit, a storage circuit, a control circuit and a bridge circuit. The protection circuit is electrically connected with...
8390975 Portable motorized frame remote racking tool  
A portable motorized racking tool for installing, removing, and testing electrical equipment is disclosed herein. The portable motorized racking tool can be used to operate upon electrical...
8362789 Impedance-based arc fault determination device (IADD) and method  
Embodiments according to the present invention provide an Impedance-based Arc-Fault Determination Device (IADD) and method that, when attached to an electrical node on the power system and through...
8305720 Latch-control protection circuit  
A latch-control protection circuit applied in a power converter is provided. The protection circuit has a comparing circuit unit and a logic gate. The comparing circuit unit is utilized to...
8299767 Dynamic safe operating area control  
In some implementations, a method of dynamically maintaining a device's operation within a safe operating area (SOA) may include sensing instantaneous voltage and current of the device;...
8300372 Apparatus, system, and/or method for protection and control of an electrical device  
An electrical device protection apparatus, such as an overload relay, can include a microprocessor 102 that can receive a wide range of current signals from a current transformer or other current...
8290710 Streetlight monitoring and control  
Methods and apparatus associated with monitoring and controlling streetlights include monitoring light levels and voltage levels at corresponding streetlights and controlling the streetlights to...
8286010 Voltage sensor for high-current junction  
A system includes a high-current junction, a voltage sensor, and a controller. Power connectors of two components are electrically connected at the high-current junction, where a high current...
8254074 Power control circuit  
A power control circuit includes a switch circuit, a current sampling circuit, a controller, and a standby power circuit. The switch circuit is connected to an alternating current (AC) power...
8248744 Voltage detecting apparatus  
The present invention is to provide a voltage detecting apparatus, which can downsize a circuit, reduce costs and detect a voltage with high accuracy, the voltage detecting apparatus to detect a...
8248743 Device having failure recovery capabilities and a method for failure recovery  
A device that has failure recovery capabilities and a method for power recovery. The method includes: detecting a potential power failure in response to a decrement rate of a supply voltage, and...
8233255 Systems and methods of power conversion for electrostatic precipitators  
The present invention describes methods and apparatus to convert and control power provided to a precipitator. An exemplary embodiment of the present invention provides a precipitator power...
8183870 Battery system and method for sensing and balancing the charge state of battery cells  
A battery system utilizes a plurality of transformers interconnected with the battery cells. The transformers each have at least one transformer core operable for magnetization in at least a first...
8184416 Inverter driver and lamp driver thereof  
An inverter driver controls an inverter that supplies driving voltages to a plurality of discharge lamps. The inverter driver senses the abnormal operation of the plurality of discharge lamps...
8164875 Portable motorized frame remote racking tool  
A portable motorized racking tool and a method for installing, removing and testing electrical equipment is described herein. A circuit breaker having a frame can be attached to a metal surface...
8136890 Shock proof devices and methods  
Devices and methods for preventing shock from a high voltage power source. In one embodiment, a device for preventing an electric shock, comprises output terminals for connecting to an external...
8098467 Method for avoidance of inadvertent protective tripping as a result of measurement errors within a protection system for an HVDC transmission installation  
A method for avoiding undesired, measurement error-induced protective tripping within a protection system of an HVDC transmission system. State variables of components of the HVDC transmission...

Matches 1 - 50 out of 416 1 2 3 4 5 6 7 8 9 >