# US 2014/0197775 A1 · Single Phase Motor Energy Economizer for Regulating the Use of Electricity > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0197775 A1 - Document ID: US20140197775A1 - Status: Published application - Kind: A1 - Application number: 14/159,108 - Filed: 2014-01-20 - Published: 2014-07-17 - Earliest claimed: 2011-03-07 - Assignees: Protective Energy Economizer Technology - Applicants: Protective Energy Economizer Technology - Inventors: Mario Marcelo Marcoccia - Web page: https://patentgrep.com/patent/US20140197775A1 ## CPC - H02P 1/029: {Restarting, e.g. after power failure} - G05B 19/042: using digital processors (G05B19/05 takes precedence) - H02H 7/09: against over-voltage; against reduction of voltage; against phase interruption - H02H 11/006: {in case of too high or too low voltage} - H02P 1/028: {wherein the motor voltage is increased at low speed, to start or restart high inertia loads} - H02P 1/42: for starting an individual single-phase induction motor {(H02P27/04 takes precedence)} - H02P 1/426: {by using a specially adapted frequency converter} - H02P 23/02: specially adapted for optimising the efficiency at low load - H02P 23/08: Controlling based on slip frequency, e.g. adding slip frequency and speed proportional frequency - H02P 23/26: Power factor control [PFC] - H02P: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS - G05B: CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS (systems for controlling or regulating non-electric variables G05D; systems for regulating electric or magnetic variables G05F; control devices or systems insofar as characterised by mechanical features only G05G) - H02H: EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS (indicating or signalling undesired working conditions G01R, e.g. G01R31/00, G08B; locating faults along lines G01R31/08; emergency protective devices H01H) ## Abstract A system for controlling power from an AC voltage to an induction motor to reduce surge when power is restored to a power grid is disclosed including, a device for switching power to the induction motor that has a trigger controllable to enable the device to provide a variable amount of power to the induction motor. The system includes a second device for measuring the AC voltage at the source to determine when power is available, hence determining when the AC voltage is within operating range. Responsive to the AC voltage coming within operating range, the system delays for a time period then initiates power to the induction motor by controlling the device for switching power. ## Claims ### Claim 1 A system for controlling power from an AC voltage to an induction motor, the system comprising: means for switching power to the induction motor, the means for switching power including a trigger, the trigger controllable to enable the means for switching at a point within a half-cycle of a waveform of the AC voltage based upon a trigger delay, whereas a full power is supplied to the induction motor when the trigger delay is zero; means for measuring the AC voltage at the source; means for determining when the AC voltage is within operating range; and responsive to the AC voltage being within operating range, the system delays for a time period then initiates power to the induction motor using the means for switching power. ### Claim 2 (depends on 1) The system for controlling power from an AC voltage to an induction motor of claim 1, wherein the time period is a fixed time period. ### Claim 3 (depends on 1) The system for controlling power from an AC voltage to an induction motor of claim 1, wherein the time period is a random time period. ### Claim 4 (depends on 1) The system for controlling power from an AC voltage to an induction motor of claim 1, further comprising a means for communicating with a remote system. ### Claim 5 (depends on 4) The system for controlling power from an AC voltage to an induction motor of claim 4, wherein the time period is controlled by the remote system. ### Claim 6 (depends on 1) The system for controlling power from an AC voltage to an induction motor of claim 1, wherein the means for initializing power further comprises a means for soft-starting the induction motor, the means for soft-starting the induction motor gradually applying the power to the induction motor. ### Claim 7 A method for reducing restart loading to a power grid caused by an induction motor, the method comprising: (a) inserting a solid state switch in series between the motor and a source of AC voltage; (b) upon initial power from the source of AC voltage, delaying for a period of time; (c) then starting the motor by decreasing a delay between a trigger of the solid state switch and the phase of the AC voltage; (d) then operating the motor until a loss of power from the source of AC voltage, then repeating from step (b). ### Claim 8 (depends on 7) The method of claim 7, wherein steps b-d are implemented by software running on a processor. ### Claim 9 (depends on 7) The method of claim 7, wherein the period of time is a fixed amount of time. ### Claim 10 (depends on 7) The method of claim 7, wherein the period of time is a random amount of time. ### Claim 11 (depends on 7) The method of claim 7, wherein the step of starting the motor includes decreasing the delay between the trigger and the phase of the AC voltage, thereby providing a soft start to the motor. ### Claim 12 A system for controlling power from an AC voltage to an induction motor, the system comprising: a power connection, the power connection interfaced to a power grid; a solid-state switch, the solid-state switch in series between the power connection and the induction motor, the solid-state switch is controlled by a trigger, the trigger is controlled to turn on the solid-state switch at a trigger delay into each half-cycle of a waveform of an AC voltage from the power connection, whereas full power is supplied to the induction motor when the trigger delay is zero; a control circuit having a processor, a memory for storing instructions interfaced to the processor, the processor controlling the trigger delay; a set of software instructions stored in the memory, the set of software instructions operable to determine when the AV voltage become present from the power grid, the set of software instructions operable to delay for a period, after the delay, the set of software instructions operable to initiate the trigger and decrease the trigger delay to start the induction motor. ### Claim 13 (depends on 12) The system for saving power of claim 12, wherein the set of software instructions are operable to delay for a fixed period of time. ### Claim 14 (depends on 12) The system for saving power of claim 12, wherein the set of software instructions are operable to delay for a random period of time. ### Claim 15 (depends on 12) The system for saving power of claim 12, wherein the set of software instructions that are operable to decrease the trigger delay to start the induction motor gradually decrease the trigger delay, thereby soft-starting the induction motor. ### Claim 16 (depends on 12) The system for saving power of claim 12, wherein the system further comprises means for communicating with a remote system and the set of software instructions that are operable to delay communicate with the remote system through the means for communicating with the remote system, waiting for a start signal before the set of software instructions that are operable to decrease the trigger delay to start the induction motor begin.