Closed-loop compensation of current measurement offset errors in alternating current motor drives
AssigneeSteering Solutions IP Holding Corporation
InventorsPrerit Pramod, Zhe Zhang, Krishna MPK Namburi, Infane O. Lowe, Aparna Saha
Life of this patent
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Abstract
Systems and methods for compensating for a current measurement offset error in a permanent magnet synchronous motor (PMSM) drive are disclosed. The systems and methods include reading an output voltage command signal, extracting a signature of a current measurement offset error from the output voltage command signal, and compensating, based on the signature, for the current measurement offset error in a closed-loop using a feedback path.
Claims20
A system for compensating for a current measurement offset error in an alternating current (AC) motor drive, the system comprising:
- a processor;
- and
- a memory that includes instructions that, when executed by the processor, cause the processor to:
- read an output voltage command signal, the output voltage command signal being configured to control the AC motor drive;
- detect a current measurement offset error from the output voltage command signal;
- extract a signature of the current measurement offset error from the output voltage command signal, wherein the signature corresponds to a pulsating frequency of a first electrical order in the output voltage command signal;
- and
- compensate, based on the signature, for the current measurement offset error in a closed-loop using a feedback path, the closed-loop being associated with the AC motor drive.
A method for compensating for a current measurement offset error in an alternating current (AC) motor drive, the method comprising:
- reading an output voltage command signal, the output voltage command signal being configured to control the AC motor drive;
- detect a current measurement offset error from the output voltage command signal;
- extracting a signature of the current measurement offset error from the output voltage command signal, wherein the signature corresponds to a pulsating frequency of a first electrical order in the output voltage command signal;
- and
- compensating, based on the signature, for the current measurement offset error in a closed-loop using a feedback path, the closed-loop being associated with the AC motor drive.
An electronic device comprising:
- a processor;
- and
- a memory that includes instructions that, when executed by the processor, cause the processor to:
- read an output voltage command signal, the output voltage command signal being configured to control an alternating current (AC) motor drive;
- detect a current measurement offset error from the output voltage command signal;
- extract a signature of a current measurement offset error from the output voltage command signal, wherein the signature corresponds to a pulsating frequency of a first electrical order in the output voltage command signal;
- and
- compensate, based on the signature, for the current measurement offset error in a closed-loop using a feedback path, the closed-loop being associated with the AC motor drive.
Dependencies are inferred from the claim text.