US 12,261,552 B2
Method for controlling a rectifier connected to a permanent-magnet synchronous electric generator to provide a direct voltage, corresponding device and computer program
Christelle Saber, Moissy-Cramayel (FR); Florent Rougier, Moissy-Cramayel (FR); Adrian Florescu, Moissy-Cramayel (FR); and Mallika Nadheria, Moissy-Cramayel (FR)
Assigned to SAFRAN, Paris (FR); and SAFRAN ELECTRICAL & POWER, Blagnac (FR)
Appl. No. 17/907,612
Filed by SAFRAN, Paris (FR); and SAFRAN ELECTRICAL & POWER, Blagnac (FR)
PCT Filed Mar. 25, 2021, PCT No. PCT/FR2021/050518
§ 371(c)(1), (2) Date Sep. 28, 2022,
PCT Pub. No. WO2021/198594, PCT Pub. Date Oct. 7, 2021.
Claims priority of application No. 2003370 (FR), filed on Apr. 3, 2020.
Prior Publication US 2023/0137395 A1, May 4, 2023
Int. Cl. H02P 11/04 (2006.01)
CPC H02P 11/04 (2013.01) 8 Claims
OG exemplary drawing
 
1. A method for controlling a rectifier connected to phases (A, B, C) of a synchronous electric generator with permanent magnets to provide a direct current voltage (Vdc), the phases (A, B, C) being designed to have phase currents (Ia, Ib, Ic) flowing through them when the electric generator is driven, the method comprising:
determining:
a first setpoint (Iq_ref) of a first vector component (Iq) of the phase currents (Ia, Ib, Ic) along a first axis (q) of a rotating reference frame (R) linked to a rotor of the electric generator, and
a second setpoint (Id_ref) of a second vector component (Id) of the phase currents (Ia, Ib, Ic) along a second axis (d) of the rotating reference frame (R), this second vector component (Id) of the phase currents (Ia, Ib, Ic) being intended to drive a defluxing of the rotor; and
controlling the rectifier from the first and second setpoints (Iq_ref, Id_ref) of the vector components (Iq, Id) of the phase currents (Ia, Ib, Ic);
characterised in that the first setpoint (Iq_ref) of the first vector component (Iq) of the phase currents (Ia, Ib, Ic) is determined from an external feedback loop designed to feedback-control a voltage of a direct current bus or to regulate a current from a battery connected to the direct current bus,
and in that the method further comprises:
determining a first theoretical setpoint (Iq_ref*) of the first vector component (Iq) of the phase currents (Ia, Ib, Ic);
determining a second theoretical setpoint (Id_ref*) of the second vector component (Id) of the phase currents (Ia, Ib, Ic); and
if a magnitude of a vector sum of the setpoints (Iq_ref, Id_ref) of the vector components (Iq, Id) of the phase currents (Ia, Ib, Ic) is less than or equal to a predefined threshold (I_max), providing the theoretical setpoints (Iq_ref*, Id_ref*) as setpoints (Iq_ref, Id_ref) of the vector components (Iq, Id) of the phase currents (Ia, Ib, Ic); and
otherwise, limiting the first theoretical setpoint (Iq_ref*) and/or the second theoretical setpoint (Id_ref*) so that a magnitude of a vector sum of the theoretical setpoints (Iq_ref*, Id_ref*) is less than or equal to the predefined threshold (I_max), and providing the theoretical setpoints (Iq_ref*, Id_ref*) after limiting the vector components (Iq, Id) of the phase currents (Ia, Ib, Ic) as setpoints (Iq_ref, Id_ref).