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US 12,341,398 B2Granted
Voltage optimization technique for a permanent magnet motor used in an electric submersible pump
AssigneeToshiba International Corporation
InventorsGoutham Selvaraj, Yao Duan, Yu Liu, Mark Rayner
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Abstract
A method for controlling a permanent magnet (PM) synchronous motor in an ESP application is provided. A load angle of the PM motor is estimated. A voltage adjustment value is determined for the PM motor based at least on the estimated load angle of the PM motor. A voltage to be applied to the PM motor is determined based on the voltage adjustment value.
Claims7
A system comprising:
- an electric submersible pump (ESP) comprising a permanent magnet (PM) motor;
- an adjustable speed drive (ASD) for powering the PM motor;
- a step-up transformer connected to an output of the ASD, the step-up transformer converting the a low voltage output from the ASD into a higher voltage output to be applied to the PM motor;
- an elongated electric cable extending between the step-up transformer and the ESP, the cable carrying electric power from the step-up transformer to the PM motor;
- and
- a control module for controlling an amount of voltage applied to the PM motor, wherein the control module comprises:
- a load angle extraction component configured to estimate a load angle of the PM motor;
- a dynamic voltage compensation component configured to determine a voltage adjustment value for the PM motor based at least on the estimated load angle of the PM motor;
- and
- a scalar control module configured to determine a voltage to be applied to the PM motor based on the voltage adjustment value.
7 more elements
Dependencies are inferred from the claim text.