22 patents
Utility
Safety shut-down system for a solar energy installation
17 Oct 23
A DC to AC converter system for solar energy installations reduces cost by eliminating low-frequency power transformers.
Paul Wilkinson Dent
Filed: 3 Sep 19
Utility
Adaptive Electrical Power Distribution Panel
18 May 23
An adaptive electrical power distribution panel receives electrical power from at least an alternative power source other than a utility electric grid, and selectively outputs power to a plurality of branch circuits, appliances, or devices.
Paul Wilkinson Dent
Filed: 16 Aug 22
Utility
Multi-level DC to AC inverter
22 Nov 22
A single- or multi-phase DC to AC converter system suited for solar energy installations achieves cost reduction by eliminating low-frequency power transformers.
Paul Wilkinson Dent
Filed: 5 Aug 19
Utility
AC electrical power measurements
4 Oct 22
An electrical measurement device for monitoring the current and power taken by a plurality of electrical loads that may be powered by a selected one of multiple AC power sources comprises sampling the voltage of said sources and the current taken by said loads at a integral number of samples per cycle at sample times determined by an independent processor clock.
Paul Wilkinson Dent
Filed: 14 Aug 17
Utility
Dual-Source Facility Power System
2 Jun 22
A dual-source facility power system includes a first electrical interface configured to receive DC power from at least one photovoltaic panel; a second electrical interface configured to receive AC power from an electric utility grid; a third electrical interface configured to deliver AC power to one or more branch circuits or appliances; and a controller.
Paul Wilkinson Dent
Filed: 16 Feb 22
Utility
Solar Energy System with Variable Priority Circuit Backup
5 May 22
A photovoltaic system providing both grid-tie and back-up operation comprises an inverter having a first, voltage-controlled output for powering appliances, and a second, current-controlled output for grid back-feed.
Paul Wilkinson Dent
Filed: 12 Nov 21
Utility
Overcurrent trip coordination between inverter and circuit breakers
18 Jan 22
An electrical installation having a first source of power, such as the utility grid, and a second source of power from an electronic DC-to-AC converter, comprises a smart load center for selecting the source of power independently for each of a number of branch circuits protected by circuit breakers to be the first source or the second source.
Paul Wilkinson Dent
Filed: 14 Aug 17
Utility
Rapid de-energization of DC conductors with a power source at both ends
7 Dec 21
A method, circuit and system arrangement is described for providing rapid de-energization for safety reasons of conductors having a DC power source at both ends.
Paul Wilkinson Dent
Filed: 29 Jun 16
Utility
Fast fault current limiter
20 Jul 21
A fast-operating AC fault current limiter, to limit the fault current let through to downstream equipment during short circuit or low-impedance faults, comprises a series inductor to limit current rise time, a current sensor to sense the instantaneous current, a series AC semiconductor switch to interrupt current flow when it exceeds the maximum desired fault current, and a shunt AC semiconductor switch to catch inductor flyback voltage when the series semiconductor switch is opened.
Paul Wilkinson Dent
Filed: 14 May 19
Utility
Transformerless DC to AC converter using selectively series-connected capacitors and PWM
4 May 21
A DC to AC converter is configured to convert DC power from a floating DC power source to AC power having a desired voltage and waveform.
Paul Wilkinson Dent
Filed: 11 Sep 20
Utility
Smart load center panel
16 Mar 21
A smart load center panel (10) accepts two hot legs from each of two power sources, and selectively connects each of a plurality of breakers to one of the two power sources under processor control.
Curtis W. Thornton, Paul Wilkinson Dent
Filed: 12 Sep 17
Utility
Neutral routing for multiple electrical power sources
9 Mar 21
In an electrical distribution system for a facility served by two power sources, ground currents on neutral conductors are avoided by utilizing a common neutral conductor in distributing power from both power sources to one or more transfer switches.
Paul Wilkinson Dent
Filed: 29 Nov 17
Utility
Transformerless DC to AC Converter Using Selectively Series-Connected Capacitors and PWM
30 Dec 20
A DC to AC converter is configured to convert DC power from a floating DC power source to AC power having a desired voltage and waveform.
Paul Wilkinson Dent
Filed: 10 Sep 20
Utility
Fast Fault Current Limiter
18 Nov 20
A fast-operating AC fault current limiter, to limit the fault current let through to downstream equipment during short circuit or low-impedance faults, comprises a series inductor to limit current rise time, a current sensor to sense the instantaneous current, a series AC semiconductor switch to interrupt current flow when it exceeds the maximum desired fault current, and a shunt AC semiconductor switch to catch inductor flyback voltage when the series semiconductor switch is opened.
Paul Wilkinson Dent
Filed: 13 May 19
Utility
Transformerless DC to AC converter
21 Sep 20
A DC to AC converter is described in which DC power presented as a set of relatively floating DC power sources of differing DC voltage values is converted to a desired AC power waveform by combining the DC voltage values with sequential sets of associated ternary-valued multiplicative weights of +1, −1, or 0, and summing the weighted voltage values, so as to produce voltage points on the desired waveform at appropriate time instants.
Paul Wilkinson Dent
Filed: 13 Aug 17
Utility
Safety shut-down system for a solar energy installation
25 May 20
A safety shut-down system for a solar energy installation includes a DC to AC inverter converting DC power from a photovoltaic solar array to AC power and generating remote control signals to enable or disable the flow of DC power from each individual photovoltaic panel or string of panels to a photovoltaic output circuit.
Paul Wilkinson Dent
Filed: 26 Dec 18
Utility
Smart Load Center Panel
29 Apr 20
A smart load center panel (10) accepts two hot legs from each of two power sources, and selectively connects each of a plurality of breakers to one of the two power sources under processor control.
Curtis W. Thornton, Paul Wilkinson Dent
Filed: 11 Sep 17
Utility
Safety Shut-Down System for a Solar Energy Installation
19 Feb 20
A safety shut-down system for a solar energy installation includes a DC to AC inverter converting DC power from a photovoltaic solar array to AC power and generating remote control signals to enable or disable the flow of DC power from each individual photovoltaic panel or string of panels to a photovoltaic output circuit.
Paul Wilkinson Dent
Filed: 2 Sep 19
Utility
Multi-Level DC to AC Inverter
22 Jan 20
A single- or multi-phase DC to AC converter system suited for solar energy installations achieves cost reduction by eliminating low-frequency power transformers.
Paul Wilkinson Dent
Filed: 4 Aug 19
Utility
Hybrid wired-wireless communication system for delivery of power from two or more sources to smart appliances
13 Jan 20
A communications system is described providing the ability to intelligently deliver electrical power from a first power source or from a second power source to a branch circuit in a facility, such as a home.
Jaap C. Haartsen, Paul Wilkinson Dent
Filed: 11 Dec 17