Patent application number | Description | Published |
20090033485 | WIRELESS SYSTEM AND WIRELESS MODULE THEREFOR - A wireless system includes a server having a port, a plurality of sensors or devices, each of which includes a wireless transceiver and a proximity sensor; and a wireless module. The wireless module includes a port interconnected with the port of the server, a wireless transceiver cooperating with the port of the wireless module, the wireless transceiver of the wireless module being structured to wirelessly communicate with the wireless transceiver of the sensors or devices, a proximity sensor structured to sense one of the sensors or devices, and a target structured to be sensed by the proximity sensor of such one of the sensors or devices. The port of the server is structured to cooperate with the port of the wireless module to transmit and receive wireless messages. The port of the wireless module cooperates with the wireless transceiver to transmit and receive the wireless messages. | 02-05-2009 |
20110090607 | STRING AND SYSTEM EMPLOYING DIRECT CURRENT ELECTRICAL GENERATING MODULES AND A NUMBER OF STRING PROTECTORS - A string includes direct current electrical generating modules electrically connected in series to form a first end and a remote second end. A power line is electrically connected to one DC EGM at the first end. A return line is electrically connected to another DC EGM at the remote second end. A first string protector is in the power line of the string, and a second SP is in the return line of the string at the remote second end. One of the first and second SPs includes a number of an over current protector, an arc fault protector, a reverse current protector and a ground fault protector. The other one of the first and second SPs includes a number of an over current protector, an arc fault protector, a reverse current protector, a ground fault protector, and a remotely controlled switch in series with the power or return lines. | 04-21-2011 |
20110301772 | PROTECTION, MONITORING OR INDICATION APPARATUS FOR A DIRECT CURRENT ELECTRICAL GENERATING APPARATUS OR A PLURALITY OF STRINGS - A protection apparatus is for a direct current electrical generating apparatus. The protection apparatus includes a first terminal; a second terminal; a third terminal; a fourth terminal; at least one current sensor structured to sense current flowing between the first and second terminals or between the third and fourth terminals; a voltage sensor structured to sense a voltage between the first terminal and the third terminal; at least one switch structured to interrupt the current flowing between the first and second terminals or between the third and fourth terminals; and a processor cooperating with the at least one current sensor, the voltage sensor and the at least one switch, and being structured to provide feed forward fault protection for the direct current electrical generating apparatus. | 12-08-2011 |
20120113554 | DC FEEDER PROTECTION SYSTEM - A direct current feeder protection system includes six conductors, four current sensors sensing four currents flowing in four of the conductors, four circuit interrupters interrupting currents flowing in the four conductors, and a processor cooperating with the current sensors to input four sensed currents, and to output a number of commands to the circuit interrupters. The processor includes a routine detecting a number of: a directional current fault of the sensed currents, a differential current fault of the sensed first and third currents or the sensed second and fourth currents, and a residual current fault of the sensed first and second currents or the sensed third and fourth currents, and to responsively output the commands. The first, fifth and third conductors are electrically connected in series with two of the circuit interrupters, and the second, sixth and fourth conductors are electrically connected in series with the other circuit interrupters. | 05-10-2012 |
Patent application number | Description | Published |
20140062209 | PHOTOVOLTAIC SYSTEM AND METHOD EMPLOYING A NUMBER OF MAXIMUM POWER POINT TRACKING MECHANISMS - A photovoltaic system includes a photovoltaic array and a DC/AC inverter. The photovoltaic array includes an output, a plurality of photovoltaic strings each including a plurality of photovoltaic modules electrically connected in series to form an output having a first direct current voltage, and a plurality of DC/DC converters each including a first maximum power point tracking mechanism for a corresponding one of the photovoltaic strings, an input of the output of the corresponding one of the photovoltaic strings, and an output having a second direct current voltage. Each output of the DC/DC converters is electrically connected in parallel or series to form the output of the photovoltaic array having a direct current voltage. The DC/AC inverter includes a second maximum power point tracking mechanism for the photovoltaic array, an input of the output of the photovoltaic array, and an output having an alternating current voltage. | 03-06-2014 |
20140324244 | CENTRALIZED CONTROLLER FOR INTELLIGENT CONTROL OF THERMOSTATICALLY CONTROLLED DEVICES - A control module for controlling a thermostatically controlled device includes a processor apparatus adapted to obtain first values for a plurality of parameters for the thermostatically controlled device, the parameters including actual power consumed by the thermostatically controlled device and a number of input parameters, determine a learned correlation function for the thermostatically controlled device based on the obtained values, wherein the learned correlation function relates power consumption of the thermostatically controlled device to at least the number of input parameters, obtain second values for each of the number of input parameters for a future usage period, and determine at least one recommended set point for the thermostatically controlled device using the learned correlation function and at least the second values for each of the number of input parameters. | 10-30-2014 |
20150162157 | SYSTEM AND METHOD FOR ADJUSTING THE TRIP CHARACTERISTICS OF A CIRCUIT BREAKER - An electrical system includes (1) a distributed power source device structured to generate: (i) AC power, and (ii) a signal indicating an amount of current being produced by the distributed power source device, and (2) a circuit breaker having set trip characteristics coupled to distributed power source device, wherein the circuit breaker is structured to receive the signal and adjust the set trip characteristics (e.g., the trip curve) based on at least the signal from the distributed power source device. | 06-11-2015 |
20150294825 | CURRENT DIRECTION SENSITIVE CIRCUIT INTERRUPTER - A circuit interrupter includes a first terminal, a second terminal, separable contacts moveable between a closed position and an open position, an operating mechanism configured to open said separable contacts, an electromagnetic element electrically connected between the first terminal and the second terminal and cooperating with said operating mechanism, and a diode electrically connected between the first terminal and the second terminal and in parallel with the electromagnetic element. When a current flowing through the circuit interrupter flows in a first direction from the first terminal toward the second terminal, the current flows through the diode. When the current flowing through the circuit interrupter flows in a second direction from the second terminal toward the first terminal, the current flows through the electromagnetic element. | 10-15-2015 |
Patent application number | Description | Published |
20100156338 | SYSTEM AND METHOD FOR MONITORING AND CONTROLLING STATOR WINDING TEMPERATURE IN A DE-ENERGIZED AC MOTOR - A system and method for measuring and controlling stator winding temperature in an AC motor while idling is disclosed. The system includes a circuit having an input connectable to an AC source and an output connectable to an input terminal of a multi-phase AC motor. The circuit further includes a plurality of switching devices to control current flow and terminal voltages in the multi-phase AC motor and a controller connected to the circuit. The controller is configured to activate the plurality of switching devices to create a DC signal in an output of the motor control device corresponding to an input to the multi-phase AC motor, determine or estimate a stator winding resistance of the multi-phase AC motor based on the DC signal, and estimate a stator temperature from the stator winding resistance. Temperature can then be controlled and regulated by DC injection into the stator windings. | 06-24-2010 |
20100315033 | SYSTEM AND METHOD OF DYNAMIC REGULATION OF REAL POWER TO A LOAD - A system and method for controlling an AC motor drive includes a control system programmed with an energy algorithm configured to optimize operation of the motor drive. Specifically, the control system receives input of an initial voltage-frequency command to the AC motor drive, receives a real-time output of the AC motor drive generated according to the initial voltage-frequency command, and determines a real-time value of a motor parameter based on the real-time output of the AC motor drive. The control system also inputs a plurality of modified voltage-frequency commands to the AC motor drive, determines the real-time value of the motor parameter corresponding to each of the plurality of modified voltage-frequency commands, and identifies an optimal value of the motor parameter based on the real-time values of the motor parameter. The control system maintains an input of a current modified voltage-frequency command when the real-time value of the motor parameter corresponds to the optimal value of the motor parameter. | 12-16-2010 |
20100315034 | SYSTEM AND METHOD OF DYNAMIC REGULATION OF REAL POWER TO A LOAD - A system and method for controlling an AC motor drive includes a control system programmed with an energy algorithm configured to optimize operation of the motor drive. Specifically, the control system input an initial voltage-frequency command to the AC motor drive based on an initial voltage/frequency (V/Hz) curve, receives a real-time output of the AC motor drive generated according to the initial voltage-frequency command, and feedback a plurality of modified voltage-frequency commands to the AC motor drive, each of the plurality of modified voltage-frequency commands comprising a deviation from the initial V/Hz curve. The control system also determines a real-time value of the motor parameter corresponding to each of the plurality of modified voltage-frequency commands, and feeds back a modified voltage-frequency command to the AC motor drive so that the real-time value of the motor parameter is within a motor parameter tolerance range. | 12-16-2010 |
20110050142 | SYSTEM AND METHOD FOR MOTOR SPEED ESTIMATION OF AN ELECTRIC MOTOR - A system and method for a motor management system includes a computer readable storage medium and a processing unit. The processing unit configured to determine a voltage value of a voltage input to an alternating current (AC) motor, determine a frequency value of at least one of a voltage input and a current input to the AC motor, determine a load value from the AC motor, and access a set of motor nameplate data, where the set of motor nameplate data includes a rated power, a rated speed, a rated frequency, and a rated voltage of the AC motor. The processing unit is also configured to estimate a motor speed based on the voltage value, the frequency value, the load value, and the set of nameplate data and also store the motor speed on the computer readable storage medium. | 03-03-2011 |
Patent application number | Description | Published |
20120280645 | SYSTEM AND METHOD OF DYNAMIC REGULATION OF REAL POWER TO A LOAD - A system and method for controlling an AC motor drive includes a control system programmed with an algorithm configured to optimize operation of the motor drive. Specifically, the control system is programmed to input an initial voltage-frequency command to the drive. The initial voltage-frequency command includes a voltage reference and a frequency reference corresponding to an operating point of an initial voltage/frequency (V/Hz) curve. The control system monitors a real-time output of the drive, modifies the voltage reference based on the real-time output of the drive, and transmits a modified voltage-frequency command to the drive. The modified voltage-frequency command corresponds to an operating point of a modified V/Hz curve defined by the modified voltage reference and the initial V/Hz curve. | 11-08-2012 |
20140055900 | METHOD AND APPARATUS FOR ENHANCING ARC FAULT SIGNAL FOR DETECTION IN PHOTOVOLTAIC SYSTEM - A photovoltaic (PV) system includes a string of at least one PV module, and an arc fault detector (AFD) electrically coupled to the string. The AFD is configured to detect a non-DC electrical current that occurs within the string, and cause electrical contacts within the PV system to open as a result of the detected non-DC electrical current. The system includes a capacitor electrically coupled to the string and to the AFD such that the non-DC electrical current passes through the AFD and the capacitor. | 02-27-2014 |
20140070815 | ACTIVE DIAGNOSTICS AND GROUND FAULT DETECTION ON PHOTOVOLTAIC STRINGS - A PV system includes a plurality of PV strings configured to generate a string output power responsive to received solar irradiation, with a source conductor and a return conductor being provided from the PV strings. One or more DC voltage regulators are electrically connected to the PV strings on at least one of the source or return conductors, with the DC voltage regulator being configured to regulate the voltage of a respective PV string or group of strings. A controller selectively controls a voltage output by the DC voltage regulator and is programmed to periodically cause the DC voltage regulator to alter the voltage of a PV string or group of strings, detect a change in current in the respective PV string(s) responsive to the altering of the voltage, and perform at least one of a PV string degradation detection and causal diagnosis and a grounded conductor fault detection. | 03-13-2014 |
20140070833 | METHOD AND APPARATUS FOR DETECTING A LOOSE ELECTRICAL CONNECTION IN PHOTOVOLTAIC SYSTEM - A power circuit configured to generate and distribute DC electrical power, the power circuit includes a photovoltaic (PV) system that includes an array of PV modules electrically coupled to a combiner box, and an inverter positioned to receive DC electrical power from the array of PV modules and output AC electrical power. The PV system also includes a signal generator coupled to a first portion of the PV system, and a signal detector coupled to a second portion of the PV system, the signal detector configured to detect secondary signals generated at a loose connection of an electrical joint in the PV system, wherein the secondary signals result from a signal generated by the signal generator. | 03-13-2014 |
20140376142 | FUSE ASSEMBLY INCLUDING RELAY AND STRING INCLUDING THE SAME - A fuse assembly structured for use with a power circuit includes: a fuse holder defining a space and including first and second terminals structured to electrically connect to the power circuit; a fuse disposed in the space defined by the fuse holder; and a relay disposed in the space defined by the fuse holder. The relay includes separable contacts, an operating mechanism structured to open and close said separable contacts, and a control circuit cooperating with said operating mechanism to cause said operating mechanism to open or close said separable contacts. Current flowing between the first and second terminals flows through the separable contacts and the fuse and opening the separable contacts interrupts said current flowing between said first and second terminals. | 12-25-2014 |
20150021982 | DIRECT CURRENT ELECTRICAL GENERATING SYSTEM INCLUDING A PLURALITY OF DIRECT CURRENT ELECTRICAL GENERATING MODULES EACH HAVING AN ELECTROMECHANICAL SWITCH - A system includes a power line, a control line, and a plurality of direct current electrical generating modules. Each of the direct current electrical generating modules is electrically connected to the power line and the control line and includes an electromechanical switch structured to interrupt power flowing through the power line. A control module is electrically connected to the control line and is structured to electrically control the electromechanical switch of each of the direct current electrical generating modules via the control line. | 01-22-2015 |
20150288165 | FAULT DETECTION AND ZONE LOCATION SYSTEM - A method of protecting a power distribution system from a fault on a feed conductor thereof, wherein an HFAC signal is provided to the feed conductor from a location downstream of the feed conductor in the power distribution system. The method includes, in a module located upstream of the feed conductor in the power distribution system, determining an HFAC signal magnitude in the module, the module including a circuit interrupter, and controlling operation of the circuit interrupter based on the determined magnitude. | 10-08-2015 |
20150311752 | MICROGRID SYSTEM STRUCTURED TO DETECT OVERLOAD CONDITIONS AND TAKE CORRECTIVE ACTIONS RELATING THERETO - A distribution manager includes a main bus, a first connection coupled to the main bus through a first circuit breaker and being structured to couple the distribution manager to an inter-microgrid connection system, a second connection coupled to the main bus through a second circuit breaker and being structured to couple the distribution manager to the inter-microgrid connection system, and a third circuit breaker coupled to the main bus and being structured to be coupled to a load. The distribution manager is configured to detect an overload condition and in response thereto (i) request to bring an offline distributed source online, (ii) if an offline distributed source cannot be brought online, request to shed the load, and (iii) if the load cannot be shed, cause the second circuit breaker to downwardly adjust the trip curve thereof. | 10-29-2015 |
Patent application number | Description | Published |
20110120601 | Dental and Medical Instruments Comprising Titanium - Endodontic instruments for use in performing root canal therapy on a tooth are disclosed. In one form, the instruments include an elongate shank having a cutting edge extending from a distal end of the shank along an axial length of the shank. The shank comprises a titanium alloy, and the shank is prepared by heat-treating the shank at a temperature above 25° C. in an atmosphere consisting essentially of a gas unreactive with the shank. In another form, the endodontic instruments have an elongate shank having a cutting edge extending from a distal end of the shank along an axial length of the shank. The shank consists essentially of a titanium alloy selected from alpha-titanium alloys, beta-titanium alloys, and alpha-beta-titanium alloys. The instruments solve the problems encountered when cleaning and enlarging a curved root canal. | 05-26-2011 |
20120118445 | Dental and Medical Instruments Comprising Titanium - Endodontic instruments for use in performing root canal therapy on a tooth are disclosed. In one form, the instruments include an elongate shank having a cutting edge extending from a distal end of the shank along an axial length of the shank. The shank comprises a titanium alloy, and the shank is prepared by heat-treating the shank at a temperature above 25° C. in an atmosphere consisting essentially of a gas unreactive with the shank. In another form, the endodontic instruments have an elongate shank having a cutting edge extending from a distal end of the shank along an axial length of the shank. The shank consists essentially of a titanium alloy selected from alpha-titanium alloys, beta-titanium alloys, and alpha-beta-titanium alloys. The instruments solve the problems encountered when cleaning and enlarging a curved root canal. | 05-17-2012 |
20120272526 | Dental and Medical Instruments Comprising Titanium - Endodontic instruments for use in performing root canal therapy on a tooth are disclosed. In one form, the instruments include an elongate shank having a cutting edge extending from a distal end of the shank along an axial length of the shank. The shank comprises a titanium alloy, and the shank is prepared by heat-treating the shank at a temperature above 25° C. in an atmosphere consisting essentially of a gas unreactive with the shank. In another form, the endodontic instruments have an elongate shank having a cutting edge extending from a distal end of the shank along an axial length of the shank. The shank consists essentially of a titanium alloy selected from alpha-titanium alloys, beta-titanium alloys, and alpha-beta-titanium alloys. The instruments solve the problems encountered when cleaning and enlarging a curved root canal. | 11-01-2012 |
20140144022 | Dental and Medical Instruments Comprising Titanium - Endodontic instruments for use in performing root canal therapy on a tooth are disclosed. In one form, the instruments include an elongate shank having a cutting edge extending from a distal end of the shank along an axial length of the shank. The shank comprises a titanium alloy, and the shank is prepared by heat-treating the shank at a temperature above 25° C. in an atmosphere consisting essentially of a gas unreactive with the shank. In another form, the endodontic instruments have an elongate shank having a cutting edge extending from a distal end of the shank along an axial length of the shank. The shank consists essentially of a titanium alloy selected from alpha-titanium alloys, beta-titanium alloys, and alpha-beta-titanium alloys. The instruments solve the problems encountered when cleaning and enlarging a curved root canal. | 05-29-2014 |
20150089810 | Dental and Medical Instruments Comprising Titanium - Endodontic instruments for use in performing root canal therapy on a tooth are disclosed. In one form, the instruments include an elongate shank having a cutting edge extending from a distal end of the shank along an axial length of the shank. The shank comprises a titanium alloy, and the shank is prepared by heat-treating the shank at a temperature above 25° C. in an atmosphere consisting essentially of a gas unreactive with the shank. In another form, the endodontic instruments have an elongate shank having a cutting edge extending from a distal end of the shank along an axial length of the shank. The shank consists essentially of a titanium alloy selected from alpha-titanium alloys, beta-titanium alloys, and alpha-beta-titanium alloys. The instruments solve the problems encountered when cleaning and enlarging a curved root canal. | 04-02-2015 |
20150250558 | Dental and Medical Instruments Comprising Titanium - Endodontic instruments for use in performing root canal therapy on a tooth are disclosed. In one form, the instruments include an elongate shank having a cutting edge extending from a distal end of the shank along an axial length of the shank. The shank comprises a titanium alloy, and the shank is prepared by heat-treating the shank at a temperature above 25° C. in an atmosphere consisting essentially of a gas unreactive with the shank. In another form, the endodontic instruments have an elongate shank having a cutting edge extending from a distal end of the shank along an axial length of the shank. The shank consists essentially of a titanium alloy selected from alpha-titanium alloys, beta-titanium alloys, and alpha-beta-titanium alloys. The instruments solve the problems encountered when cleaning and enlarging a curved root canal. | 09-10-2015 |
20150250559 | Dental and Medical Instruments Comprising Titanium - Endodontic instruments for use in performing root canal therapy on a tooth are disclosed. In one form, the instruments include an elongate shank having a cutting edge extending from a distal end of the shank along an axial length of the shank. The shank comprises a titanium alloy, and the shank is prepared by heat-treating the shank at a temperature above 25° C. in an atmosphere consisting essentially of a gas unreactive with the shank. In another form, the endodontic instruments have an elongate shank having a cutting edge extending from a distal end of the shank along an axial length of the shank. The shank consists essentially of a titanium alloy selected from alpha-titanium alloys, beta-titanium alloys, and alpha-beta-titanium alloys. The instruments solve the problems encountered when cleaning and enlarging a curved root canal. | 09-10-2015 |
20150252463 | Dental and Medical Instruments Comprising Titanium - Endodontic instruments for use in performing root canal therapy on a tooth are disclosed. In one form, the instruments include an elongate shank having a cutting edge extending from a distal end of the shank along an axial length of the shank. The shank comprises a titanium alloy, and the shank is prepared by heat-treating the shank at a temperature above 25° C. in an atmosphere consisting essentially of a gas unreactive with the shank. In another form, the endodontic instruments have an elongate shank having a cutting edge extending from a distal end of the shank along an axial length of the shank. The shank consists essentially of a titanium alloy selected from alpha-titanium alloys, beta-titanium alloys, and alpha-beta-titanium alloys. The instruments solve the problems encountered when cleaning and enlarging a curved root canal. | 09-10-2015 |