System and method of dynamic regulation of real power to a load
First Claim
1. A control system for controlling an AC motor drive, the control system programmed to:
- input an initial voltage-frequency command to the AC motor drive corresponding to a static voltage-frequency profile;
receive a real-time output of the AC motor drive generated according to the initial voltage-frequency command;
determine a real-time value of a motor parameter based on the real-time output of the AC motor drive;
input a plurality of modified voltage-frequency commands to the AC motor drive corresponding to a dynamic voltage-frequency profile;
determine the real-time value of the motor parameter corresponding to each of the plurality of modified voltage-frequency commands;
identify an optimal value of the motor parameter based on the real-time values of the motor parameter; and
maintain 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, wherein the current modified voltage-frequency command corresponds to a peak value of the motor parameter.
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Accused Products
Abstract
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.
29 Citations
25 Claims
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1. A control system for controlling an AC motor drive, the control system programmed to:
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input an initial voltage-frequency command to the AC motor drive corresponding to a static voltage-frequency profile; receive a real-time output of the AC motor drive generated according to the initial voltage-frequency command; determine a real-time value of a motor parameter based on the real-time output of the AC motor drive; input a plurality of modified voltage-frequency commands to the AC motor drive corresponding to a dynamic voltage-frequency profile; determine the real-time value of the motor parameter corresponding to each of the plurality of modified voltage-frequency commands; identify an optimal value of the motor parameter based on the real-time values of the motor parameter; and maintain 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, wherein the current modified voltage-frequency command corresponds to a peak value of the motor parameter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for controlling a motor drive output comprising:
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operating a motor drive according to a static voltage-frequency profile to generate an output power; determining a value of a specified motor parameter corresponding to the static voltage-frequency profile; and selectively modifying the static voltage-frequency profile during operation of the motor drive to generate a reduced motor input power; wherein selectively modifying the default voltage-frequency profile comprises; adjusting a voltage-frequency setting during operation of the motor drive such that a reduced motor input power is generated according to a dynamic voltage-frequency profile; determining a value of the specified motor parameter for each voltage-frequency setting of the dynamic voltage-frequency profile; and operating the motor drive at a voltage-frequency setting corresponding to a peak value of the specified motor parameter. - View Dependent Claims (15, 16, 17)
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18. A motor drive configured to supply power to a load, the motor drive comprising:
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an inverter designed to provide power to the load; and a controller operationally connected to control operation of the inverter, the controller configured to; cause the inverter to operate according to an initial voltage-frequency setting of a static voltage-frequency profile; adjust the voltage-frequency setting during operation of the motor drive to cause the inverter to operate according to each of a plurality of varied voltage-frequency settings of a dynamic voltage-frequency profile; monitor a real-time value of a motor parameter corresponding to the varied voltage-frequency settings; identify an optimal value for the motor parameter based on the monitored real-time values of the motor parameter; and cause the inverter to operate according to the voltage-frequency setting corresponding to the identified optimal value for the motor parameter, the voltage-frequency setting corresponding to a peak value of the motor parameter. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
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Specification