Abstract
A method and apparatus for self-commissioning a bearingless-motor drive, which includes a bearingless motor and a control unit of the bearingless motor are disclosed. The motor includes at least one winding and at least one permanent magnet. The method includes generating a magnetic model, the magnetic model including a plurality of constant parameters; supplying, while the movable part remains standstill, to the at least one winding at least two unequal currents; measuring, with a magnetic sensor, flux linkages caused by said at least two unequal currents, respectively; calculating, with the magnetic model, flux linkages by inputting to the magnetic model current values equal to the currents supplied to the at least one winding; and fitting, with a least-squares fitting algorithm, at least one constant parameter in the magnetic model such that the difference between the measured and calculated flux linkages will be minimized.
| Original language | English |
|---|---|
| Patent number | US 11 043 864 (B2) |
| IPC | H02P 21/14,H02K 1/28 |
| Priority date | 03/09/2018 |
| Filing date | 14/08/2019 |
| Publication status | Published - 22 Jun 2021 |
| MoE publication type | H1 Granted patent |