Patents by Inventor Travis C. Mallett
Travis C. Mallett has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20240077868Abstract: A configurable multi-sensor analog input may be utilized to connect a power system sensor to an intelligent electronic device. The configurable multi-sensor analog input may include an input port comprising a plurality of input pins and configured to receive electrical signals from one of a plurality of types of power system sensors. The configurable multi-sensor analog input may additionally include a plurality of input channels, each of the plurality of input channels coupled to a subset of the input pins, wherein the subset of input pins in electrical communication with of the plurality of types of power system sensors power system sensor is configured to selectively activate one of the plurality of input channels. A multiplexer may be in electrical communication with the plurality of input channels and configured to select an output based on the subset of input pins in electrical communication with one of the plurality of types of power system sensors.Type: ApplicationFiled: September 7, 2022Publication date: March 7, 2024Applicant: Schweitzer Engineering Laboratories, Inc.Inventors: Veselin Skendzic, Travis C. Mallett, Syed Ali Kazi, Harshad S. Aherao, Dhruba P. Das, Sandesh Chitnis
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Patent number: 11650264Abstract: The present disclosure pertains to systems and methods for monitoring a capacitance-coupled voltage transformer (CCVT) in electrical communication with the electric power delivery system, the CCVT comprising a stack of capacitors and an electrical contact to a first ground connection. A first current transformer is disposed between the stack of capacitors and the first ground connection. The current transformer provides an electrical signal corresponding to a current associated with the CCVT. A second transformer is disposed to provide a second electrical signal related to the CCVT. The second signal may be a voltage signal or a current signal. An intelligent electronic device (IED) in electrical communication with the current measurement devices monitors a health factor comprising a ratio of magnitudes or a difference between phases from the transformers at a single frequency. The health factor is compared against an acceptable range and an alarm is generated when the range is exceeded.Type: GrantFiled: October 26, 2021Date of Patent: May 16, 2023Assignee: Schweitzer Engineering Laboratories, Inc.Inventors: Travis C. Mallett, Robert Lopez, Jr.
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Patent number: 11564309Abstract: The present disclosure relates to systems and methods using thermal vias to increase the current-carrying capacity of conductive traces on a multilayered printed circuit board (PCB). In various embodiments, parameters associated with vias may be selected to control various electrical and thermal properties of the conductive trace. Such parameters include the via diameter, a plating thickness, a number of vias, a placement of the vias, an amount of conductive material to be added or removed from the conductive trace, a change in the resistance of the conductive trace, a change in a fusing measurement of the conductive trace, and the like.Type: GrantFiled: December 5, 2019Date of Patent: January 24, 2023Assignee: Schweitzer Engineering Laboratories, Inc.Inventors: Travis C. Mallett, Ben M. Armstrong, Forrest A. Rahrer
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Publication number: 20220043070Abstract: The present disclosure pertains to systems and methods for monitoring a capacitance-coupled voltage transformer (CCVT) in electrical communication with the electric power delivery system, the CCVT comprising a stack of capacitors and an electrical contact to a first ground connection. A first current transformer is disposed between the stack of capacitors and the first ground connection. The current transformer provides an electrical signal corresponding to a current associated with the CCVT. A second transformer is disposed to provide a second electrical signal related to the CCVT. The second signal may be a voltage signal or a current signal. An intelligent electronic device (IED) in electrical communication with the current measurement devices monitors a health factor comprising a ratio of magnitudes or a difference between phases from the transformers at a single frequency. The health factor is compared against an acceptable range and an alarm is generated when the range is exceeded.Type: ApplicationFiled: October 26, 2021Publication date: February 10, 2022Applicant: Schweitzer Engineering Laboratories, Inc.Inventors: Travis C. Mallett, Robert Lopez, JR.
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Patent number: 11187727Abstract: The present disclosure pertains to systems and methods for monitoring a capacitance-coupled voltage transformer (CCVT) in electrical communication with the electric power delivery system, the CCVT comprising a stack of capacitors and an electrical contact to a first ground connection. A first current transformer is disposed between the stack of capacitors and the first ground connection. The current transformer provides an electrical signal corresponding to a current associated with the CCVT. A second current transformer is disposed between a primary winding of a step-down transformer associated with the CCVT and a second ground connection. An intelligent electronic device (IED) in electrical communication with the current measurement devices monitors a ratio of magnitudes from the current transformers at a single frequency. The ratio is compared against an acceptable range. When the ratio exceeds the acceptable range, an alarm is generated.Type: GrantFiled: April 29, 2019Date of Patent: November 30, 2021Assignee: Schweitzer Engineering Laboratories, Inc.Inventors: Travis C Mallett, Robert Lopez, Jr.
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Patent number: 11105832Abstract: The present disclosure pertains to systems and methods for detecting traveling waves in electric power delivery systems. In one embodiment, a system comprises a capacitance-coupled voltage transformer (CCVT) in electrical communication with the electric power delivery system, the CCVT comprising a stack of capacitors and an electrical contact to a first ground connection. Electrical signals from accessible portions of the CCVT are used to detect traveling waves. Current and/or voltage signals may be used. In various embodiments, a single current may be used. The traveling waves may be used to detect a fault on the electric power delivery system.Type: GrantFiled: October 6, 2020Date of Patent: August 31, 2021Assignee: Schweitzer Engineering Laboratories, Inc.Inventors: Edmund O. Schweitzer, III, Bogdan Z. Kasztenny, Veselin Skendzic, Travis C. Mallett, Robert Lopez, Jr.
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Publication number: 20210018538Abstract: The present disclosure pertains to systems and methods for detecting traveling waves in electric power delivery systems. In one embodiment, a system comprises a capacitance-coupled voltage transformer (CCVT) in electrical communication with the electric power delivery system, the CCVT comprising a stack of capacitors and an electrical contact to a first ground connection. Electrical signals from accessible portions of the CCVT are used to detect traveling waves. Current and/or voltage signals may be used. In various embodiments, a single current may be used. The traveling waves may be used to detect a fault on the electric power delivery system.Type: ApplicationFiled: October 6, 2020Publication date: January 21, 2021Applicant: Schweitzer Engineering Laboratories, Inc.Inventors: Edmund O. Schweitzer, III, Bogdan Z. Kasztenny, Veselin Skendzic, Travis C. Mallett, Robert Lopez, JR.
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Publication number: 20200341035Abstract: The present disclosure pertains to systems and methods for monitoring a capacitance-coupled voltage transformer (CCVT) in electrical communication with the electric power delivery system, the CCVT comprising a stack of capacitors and an electrical contact to a first ground connection. A first current transformer is disposed between the stack of capacitors and the first ground connection. The current transformer provides an electrical signal corresponding to a current associated with the CCVT. A second current transformer is disposed between a primary winding of a step-down transformer associated with the CCVT and a second ground connection. An intelligent electronic device (IED) in electrical communication with the current measurement devices monitors a ratio of magnitudes from the current transformers at a single frequency. The ratio is compared against an acceptable range. When the ratio exceeds the acceptable range, an alarm is generated.Type: ApplicationFiled: April 29, 2019Publication date: October 29, 2020Applicant: Schweitzer Engineering Laboratories, Inc.Inventors: Travis C. Mallett, Robert Lopez, JR.
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Publication number: 20200113043Abstract: The present disclosure relates to systems and methods using thermal vias to increase the current-carrying capacity of conductive traces on a multilayered printed circuit board (PCB). In various embodiments, parameters associated with vias may be selected to control various electrical and thermal properties of the conductive trace. Such parameters include the via diameter, a plating thickness, a number of vias, a placement of the vias, an amount of conductive material to be added or removed from the conductive trace, a change in the resistance of the conductive trace, a change in a fusing measurement of the conductive trace, and the like.Type: ApplicationFiled: December 5, 2019Publication date: April 9, 2020Applicant: Schweitzer Engineering Laboratories, Inc.Inventors: Travis C. Mallett, Ben M. Armstrong, Forrest A. Rahrer
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Patent number: 10537016Abstract: The present disclosure relates to systems and methods using thermal vias to increase the current-carrying capacity of conductive traces on a multilayered printed circuit board (PCB). In various embodiments, parameters associated with vias may be selected to control various electrical and thermal properties of the conductive trace. Such parameters include the via diameter, a plating thickness, a number of vias, a placement of the vias, an amount of conductive material to be added or removed from the conductive trace, a change in the resistance of the conductive trace, a change in a fusing measurement of the conductive trace, and the like.Type: GrantFiled: April 19, 2017Date of Patent: January 14, 2020Assignee: Schweitzer Engineering Laboratories, Inc.Inventors: Travis C. Mallett, Ben M. Armstrong, Forrest A. Rahrer
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Patent number: 10033400Abstract: Disclosed are systems and methods for identifying and reporting failures of an analog-to-digital converter (ADC). Specifically, the systems and methods described herein evaluate quantization noise properties of ADCs, including delta-sigma ADCs and successive approximation register (SAR) ADCs, to verify functionality and/or identify failures. Quantization noise properties can be evaluated in the frequency domain by, for example, comparing RMS values, magnitudes, frequency spectrums, and the like, in various frequency bands to threshold values and/or to verify an expected noise shape. Quantization noise properties can additionally or alternatively be evaluated in the time domain by, for example, comparing counts of pulse widths, average pulse widths, and/or number of transitions within a sequence of pulses to threshold values and/or to similar identifiable characteristics in other pulse width bands.Type: GrantFiled: October 18, 2017Date of Patent: July 24, 2018Assignee: Schweitzer Engineering Laboratories, Inc.Inventor: Travis C. Mallett
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Patent number: 9985646Abstract: Disclosed are systems and methods for identifying and reporting failures of an analog-to-digital converter (ADC). Specifically, the systems and methods described herein evaluate quantization noise properties of ADCs, including delta-sigma ADCs and successive approximation register (SAR) ADCs, to verify functionality and/or identify failures. Quantization noise properties can be evaluated in the frequency domain by, for example, comparing RMS values, magnitudes, frequency spectrums, and the like, in various frequency bands to threshold values and/or to verify an expected noise shape. Quantization noise properties can additionally or alternatively be evaluated in the time domain by, for example, comparing counts of pulse widths, average pulse widths, and/or number of transitions within a sequence of pulses to threshold values and/or to similar identifiable characteristics in other pulse width bands.Type: GrantFiled: October 18, 2017Date of Patent: May 29, 2018Assignee: Schweitzer Engineering Laboratories, Inc.Inventor: Travis C. Mallett
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Patent number: 9935646Abstract: The present disclosure provides systems and methods for identifying failures in an analog to digital (A/D) converter. An intelligent electronic device (IED) may monitor a digital output of one or more A/D converters. The IED may determine a slope value limit associated with the A/D converter. The IED may determine an output slope value of the digital output based on a difference of a converter output value measured at a first time and a converter output value measured at a later time. If the determined output slope value exceeds the slope value limit, the IED may identify a failure of the A/D converter. An IED may determine that concurrent failures in multiple, parallel A/D converters are indicative of a problem upstream from the A/D converters.Type: GrantFiled: July 17, 2015Date of Patent: April 3, 2018Assignee: Schweitzer Engineering Laboratories, Inc.Inventor: Travis C. Mallett
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Publication number: 20170311440Abstract: The present disclosure relates to systems and methods using thermal vias to increase the current-carrying capacity of conductive traces on a multilayered printed circuit board (PCB). In various embodiments, parameters associated with vias may be selected to control various electrical and thermal properties of the conductive trace. Such parameters include the via diameter, a plating thickness, a number of vias, a placement of the vias, an amount of conductive material to be added or removed from the conductive trace, a change in the resistance of the conductive trace, a change in a fusing measurement of the conductive trace, and the like.Type: ApplicationFiled: April 19, 2017Publication date: October 26, 2017Applicant: Schweitzer Engineering Laboratories, Inc.Inventors: Travis C. Mallett, Ben M. Armstrong, Forrest A. Rahrer
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Patent number: 9787317Abstract: Systems and methods for identifying and reporting failures of an analog to digital (A/D) conversion system are presented. The systems and methods may detect and report a problem of input circuitry of an A/D converter and/or an A/D converter itself. For example, an identifiable characteristic can be introduced into the input signal provided to an A/D converter. The A/D converter may output a digital value that includes the identifiable characteristic of the A/D converter input. A monitoring system may determine and/or report a change in, or a failure of, the A/D converter or input circuitry thereto, based on the identification, non-existence of, or variation in the identifiable characteristic in the digital output.Type: GrantFiled: January 26, 2017Date of Patent: October 10, 2017Assignee: Schweitzer Engineering Laboratories, Inc.Inventor: Travis C. Mallett
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Publication number: 20170207792Abstract: The present disclosure provides systems and methods for identifying and reporting failures of an analog to digital (A/D) conversion system. The systems and methods may detect and report a problem of input circuitry of an A/D converter and/or an A/D converter itself. For example, an identifiable characteristic can be introduced into the input signal provided to an A/D converter. The A/D converter may output a digital value that includes the identifiable characteristic of the A/D converter input. A monitoring system may determine and/or report a change in, or a failure of, the A/D converter or input circuitry thereto, based on the identification, non-existence of, or variation in the identifiable characteristic in the digital output.Type: ApplicationFiled: January 26, 2017Publication date: July 20, 2017Applicant: Schweitzer Engineering Laboratories, Inc.Inventor: Travis C. Mallett
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Patent number: 9698809Abstract: Disclosed are systems and methods for identifying and reporting failures of an analog to digital (A/D) conversion system. An A/D conversion system includes a test signal generator configured to generate a test signal including an identifiable characteristic, an A/D converter configured to convert an analog signal measured at an input of the A/D converter to a digital output, and signal injection circuitry configured to inject at least a portion of the test signal from the test signal generator as an injected signal into the analog signal using trace-to-trace crosstalk. A method includes determining whether the digital output generated by the A/D converter indicates the identifiable characteristic.Type: GrantFiled: July 19, 2016Date of Patent: July 4, 2017Assignee: Scweitzer Engineering Laboratories, Inc.Inventor: Travis C Mallett
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Patent number: 9584148Abstract: The present disclosure provides systems and methods for identifying and reporting failures of an analog to digital (A/D) conversion system. The systems and methods are configured to detect and report a failure of a preamplifier of the A/D conversion system and/or a failure of a A/D converter of the A/D conversion system. A high frequency component can be included in the input of an A/D converter. The A/D converter is configured to output a digital value to the A/D conversion system, wherein the digital value includes the high frequency component of the A/D converter input. The A/D conversion system is configured to determine an output status, including a frequency component and a corresponding amplitude, and to determine a failure of the A/D conversion system based on the determined output status. The A/D conversion system can report a change in, or a failure of, the A/D converter, and can operate or prevent operation of protection elements.Type: GrantFiled: January 19, 2016Date of Patent: February 28, 2017Assignee: Schweitzer Engineering Laboratories, Inc.Inventor: Travis C. Mallett
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Patent number: 9564914Abstract: The present disclosure provides systems and methods for identifying changes in and failures of a reference voltage of an analog to digital (A/D) converter. A non-scalar function of the reference voltage of the A/D converter can be determined and output to the A/D converter. The A/D converter is configured to output a digital value to the A/D conversion system, wherein the digital value corresponds to the non-scalar function of the reference voltage. The A/D conversion system decodes the non-scalar function of the reference voltage with a corresponding inverse function, and may determine the drift factor associated with the reference voltage. The A/D conversion system can report a change in, or a failure of, the A/D converter or its reference voltage, and can operate or prevent operation of protection elements.Type: GrantFiled: March 24, 2016Date of Patent: February 7, 2017Assignee: Schweitzer Engineering Laboratories, Inc.Inventors: Travis C. Mallett, Ben M. Armstrong
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Publication number: 20170019120Abstract: The present disclosure provides systems and methods for identifying failures in an analog to digital (A/D) converter. An intelligent electronic device (IED) may monitor a digital output of one or more A/D converters. The IED may determine a slope value limit associated with the A/D converter. The IED may determine an output slope value of the digital output based on a difference of a converter output value measured at a first time and a converter output value measured at a later time. If the determined output slope value exceeds the slope value limit, the IED may identify a failure of the A/D converter. An IED may determine that concurrent failures in multiple, parallel A/D converters are indicative of a problem upstream from the A/D converters.Type: ApplicationFiled: July 17, 2015Publication date: January 19, 2017Inventor: Travis C. Mallett