US 12,438,486 B2
Motor phase current reconstruction
John Emmanuel Atienza Tan, Antipolo (PH); Emmanuel Belen Antonio, Santo Tomas (PH); Jhaebhee Mark Quiroz Calderon, Pasig (PH); and John Henry Rementilla Puente, Pasay (PH)
Assigned to POWER INTEGRATIONS, INC., San Jose, CA (US)
Filed by Power Integrations, Inc., San Jose, CA (US)
Filed on May 25, 2022, as Appl. No. 17/824,557.
Prior Publication US 2023/0387841 A1, Nov. 30, 2023
Int. Cl. H02P 21/13 (2006.01); H02P 21/18 (2016.01); H02P 21/22 (2016.01); H02P 21/34 (2016.01)
CPC H02P 21/13 (2013.01) [H02P 21/18 (2016.02); H02P 21/22 (2016.02); H02P 21/34 (2016.02)] 21 Claims
OG exemplary drawing
 
1. A system controller for a motor drive system with a plurality of devices that are operable to drive a motor, the system controller comprising:
a phase current reconstructor configured to perform operations comprising:
receiving a plurality of phase current sense signals including a respective phase current sense signal from each device of the plurality of devices,
selecting, based on a stator current angle, a reference table from among a plurality of reference tables that store reconstruction scaling factors,
obtaining, from the selected reference table, a respective reconstruction scaling factor for one of the phase currents,
generating, based on the respective reconstruction scaling factor for one of the phase currents, respective reconstructed phase current magnitude values for the plurality of devices, and
outputting the reconstructed phase current magnitude values;
a reference frame translator configured to receive the output reconstructed phase current magnitude values and to generate an alpha-component and a beta-component of a reference frame of the stator;
a stator current angle estimator configured to compute an estimate of the stator current angle in response to the alpha-component and the beta-component, and to provide the estimate of the stator current angle back to the phase current reconstructor; and
a control signal generator configured to generate a set of control signals for the plurality of devices based on the reconstructed phase current magnitude values.