# US 11,114,947 B2 · Load identifying AC power supply with control and methods > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,114,947 B2 - Document ID: US11114947B2 - Status: Granted - Kind: B2 - Application number: 16/340,474 - Filed: 2017-08-11 - Published: 2019-08-08 - Granted: 2021-09-07 - Earliest claimed: 2016-10-28 - Applicants: Intelesol, LLC - Inventors: Mark Telefus; Harry Rodriguez; Chris Casey; Thar Casey - Web page: https://patentgrep.com/patent/US11114947B2 ## CPC - H02M 7/217: using semiconductor devices only - G01R 19/2513: {Arrangements for monitoring electric power systems, e.g. power lines or loads; Logging} - G05F 1/66: Regulating electric power - H02J 3/00: Circuit arrangements for AC mains or AC distribution networks - H02J 13/1311: {using the power network as support for the transmission} - H02M 1/08: Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters - H02P 27/04: using variable-frequency supply voltage, e.g. inverter or converter supply voltage - H05B 47/10: Controlling the light source - H02M 1/0006: {Arrangements for supplying an adequate voltage to the control circuit of converters} - H02M 1/32: Means for protecting converters other than automatic disconnection - H02M 1/36: Means for starting or stopping converters - H02M 5/2932: {with automatic control of output voltage, current or power} - H02M 7/125: {Avoiding or suppressing excessive transient voltages or currents} - H02M: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF (transformers H01F; dynamo-electric converters H02K47/00; controlling transformers, reactors or choke coils, control or regulation of electric motors, generators or dynamo-electric converters H02P) - G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12) - G05F: SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - H02P: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL ## Abstract An improved AC power supply is described. The supply identifies the load through monitoring the current and voltage wave forms and phase relations with the AC Mains. The comparison is done in conditions where the power to the load is programmably varied through use of a control switch located in the line and neutral between the AC mains and the load. The program of controlling the switch is varied to optimize the ability to distinguish similar load types. The switch can be further used to control power to the load that varies according to a set of rules based upon the identity of the load. In a preferred embodiment, the design enables high efficiency with minimal components that may be fully integrated onto silicon. ## Claims ### Claim 1 A power supply to connect an AC supply to an electronic load and identify the load, the power supply comprising: a) an AC to DC converter, b) an electronic switch, wherein the switch includes a switch controller and the switch controller provides phase angle modulation of a voltage from the AC supply to the load, and, c) a first voltage sensor to monitor the voltage of the AC supply, and, d) a second voltage sensor to monitor a voltage applied to the load, and, e) a current sensor to monitor a current drawn by the load, and, f) a microprocessor powered by the AC to DC converter and programmed to accept input from the first voltage sensor, the second voltage sensor and the current sensor and to control the switch controller, such that, a first set of waveforms of the first voltage sensor, the second voltage sensor and the current sensor are acquired during a first period of time after a connection of the load to the power supply, and, a second set of waveforms of the first voltage sensor, the second voltage sensor and the current sensor are acquired during a second period of time after a connection of the load to the power supply, each of the first set of waveforms and the second set of waveforms having an amplitude and a phase shift relative to one another, and, g) the voltage to the load during the second period of time is reduced using phase angle modulation of the AC voltage to the load by the switch, and, h) the microprocessor is further programmed to identify the load by comparing the first set of waveforms with the second set of waveforms. ### Claim 2 (depends on 1) The AC power supply of claim 1 wherein identifying the load includes identifying the load as one selected from: a pure resistive Load, a constant power resistive load, a pure reactive load, and, a constant power reactive load. ### Claim 3 (depends on 1) The AC power supply of claim 1 wherein the power to the load is controlled by the switch based upon identifying the load and a pre-selected set of rules associated with the identifying of the load. ### Claim 4 (depends on 1) The AC power supply of claim 1 wherein all components of the AC power supply are integrated onto silicon. ### Claim 5 (depends on 1) The AC power supply of claim 1 wherein the load is galvanically isolated from the AC power supply. ### Claim 6 (depends on 1) The AC power supply of claim 1 wherein the second voltage sensor and the current sensor are galvanically isolated from the load and the AC power supply. ### Claim 7 (depends on 1) The AC power supply of claim 1 wherein the AC power supply is located in an electrical supply panel. ### Claim 8 (depends on 1) The AC power supply of claim 1 wherein the AC power supply is located in an outlet box. ### Claim 9 (depends on 1) The AC power supply of claim 1 wherein the AC power supply is located in an extension cord. ### Claim 10 (depends on 1) The AC power supply of claim 1 wherein the electronic load is a plurality of electronic load devices. ### Claim 11 (depends on 1) The AC power supply of claim 1 wherein the comparing the first set of waveforms with the second set of waveforms includes: a) comparing the phase of the phase of the waveform of the second voltage sensor and phase of the waveform of the current sensor with the phase of the waveform of the first voltage sensor, and, b) comparing the product of the amplitude of the second voltage sensor multiplied by the amplitude of the current sensor each during the first period of time with the the product of the amplitude of the second voltage sensor multiplied by the amplitude of the current sensor each during the second period of time. ### Claim 12 (depends on 1) The AC power supply of claim 1 wherein the comparing the first set of waveforms with the second set of waveforms includes: a) comparing a high frequency component of the waveform of the first voltage sensor with a high frequency component of the waveform of the second voltage sensor during the first period of time, and, b) comparing a high frequency component of the waveform of the first voltage sensor with a high frequency component of the waveform of the second voltage sensor during the second period of time, and, c) the comparing of the high frequency components during the first and second period of time generating a pattern characteristic of the identity of the load. ### Claim 13 A method of identifying an electronic load connected to an AC supply, the method comprising: a) acquiring a waveform of the voltage of the AC supply during a first period of time, b) acquiring a waveform of the voltage across the load during a first period of time, c) acquiring a waveform of the current through the load during a first period of time, and, d) reducing the voltage of the AC supply to the load during a second period of time, and, e) acquiring a waveform of the voltage of the AC supply during the second period of time, f) acquiring a waveform of the voltage across the load during the second period of time, g) acquiring a waveform of the current through the load during the second period of time, and, h) each of the waveforms having an amplitude and a phase relative to one another, and, i) identifying the load by comparing waveforms acquired during the first period of time with the waveforms acquired during the second period of time. ### Claim 14 (depends on 13) The method of claim 13 wherein identifying the load includes identifying the load as one selected from: a pure resistive load, a constant power resistive load, a pure reactive load, and, a constant power reactive load. ### Claim 15 (depends on 13) The method of claim 13 further including controlling the power to the load based upon identifying the load and a pre-selected set of rules associated with the identifying of the load. ### Claim 16 (depends on 13) The method of claim 13 wherein the comparing the first set of waveforms with the second set of waveforms includes: a) comparing the phase of the waveform of the second voltage sensor and phase of the waveform of the current sensor with the phase of the waveform of the first voltage sensor, and, b) comparing the product of the amplitude of the second voltage sensor multiplied by the amplitude of the current sensor, each during the first period of time, with the the product of the amplitude of the second voltage sensor multiplied by the amplitude of the current sensor, each during the second period of time. ### Claim 17 (depends on 13) The method of claim 13 wherein the comparing the first set of waveforms with the second set of waveforms includes: a) comparing a high frequency component of the waveform of the first voltage sensor with a high frequency component of the waveform of the second voltage sensor during the first period of time, and, b) comparing a high frequency component of the waveform of the first voltage sensor with a high frequency component of the waveform of the second voltage sensor during the second period of time, and, c) the comparing of the high frequency components during the first and second period of time generating a pattern characteristic of the identity of the load.