Abstract
In this letter, we propose a novel cumulative error calibration method for the incremental encoders used in permanent magnet synchronous motors (PMSM) based on precise position estimation and counter value error (CVE) compensation. First, a sliding-mode observer (SMO) with analog delay compensated is innovatively developed to estimate the precise rotor position. The novel analog delay compensation method is achieved based on two sequential procedures: phase delay computation and current compensation. Then, relying on the errors between the accurate position estimated by the SMO and the measured one, the CVE can be calculated to correct the output of the counter. Finally, the experiment is conducted on a three-phase 1.5 kW PMSM to validate the proposed cumulative error calibration strategy.
Original language | English |
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Pages (from-to) | 9667-9672 |
Number of pages | 6 |
Journal | IEEE Transactions on Industrial Electronics |
Volume | 69 |
Issue number | 9 |
DOIs | |
State | Published - 1 Sep 2022 |
Keywords
- Analog delay
- cumulative error calibration
- incremental encoder
- permanent magnet synchronous motor (PMSM)
- sliding-mode observer (SMO)