US 11,873,112 B2
System for synchronising energy sources coupled to an aircraft
Jean-Philippe Salanne, Moissy-Cramayel (FR); Stéphane Petibon, Moissy-Cramayel (FR); Florent Rougier, Moissy-Cramayel (FR); José Del Castillo, Blagnac (FR); and Alexander Salimian, Blagnac (FR)
Assigned to SAFRAN, Paris (FR); and SAFRAN ELECTRICAL & POWER, Blagnac (FR)
Appl. No. 17/059,386
Filed by SAFRAN, Paris (FR); and SAFRAN ELECTRICAL & POWER, Blagnac (FR)
PCT Filed May 29, 2019, PCT No. PCT/FR2019/051278
§ 371(c)(1), (2) Date Nov. 27, 2020,
PCT Pub. No. WO2019/229390, PCT Pub. Date Dec. 5, 2019.
Claims priority of application No. 1854575 (FR), filed on May 29, 2018.
Prior Publication US 2021/0237894 A1, Aug. 5, 2021
Int. Cl. B64D 41/00 (2006.01); H02J 3/40 (2006.01)
CPC B64D 41/007 (2013.01) [H02J 3/40 (2013.01); B64D 2221/00 (2013.01); H02J 2300/28 (2020.01); H02J 2310/44 (2020.01)] 9 Claims
OG exemplary drawing
 
1. A system (100) for synchronizing energy sources coupled on an electrical network supplying at least one electrical load (2) of an aircraft, said system comprising:
a principal electrical energy source (1) configured to supply said electrical load with a principal electrical power, comprising a multistage generator set (6), said multistage generator set (6) comprising:
a primary stage (6a) comprising a permanent-magnet generator,
a secondary stage (6b) comprising an exciter, and
a tertiary stage (6c) comprising a principal generator connected to said electrical load;
an auxiliary electrical energy source (3) configured to supply said electrical load (2) with an additional electrical power supplementing the principal electrical power;
a converter (4) through which the auxiliary electrical energy source (3) is connected with the electrical load (2) in parallel with the principal electrical energy source;
a synchronization device (72) for synchronizing the principal source (1) and of the auxiliary source (3), configured to:
measure an electrical voltage generated by the permanent-magnet generator of the primary stage (6a) of the multistage generator set (6);
measure an electrical frequency at terminals of the converter
compare the measured electrical frequency to a frequency threshold or compare a level of use of the principal electrical energy source deduced from the measured electrical frequency to an over-use threshold;
when the measured electrical frequency is above the frequency threshold or when the level of use of the principal electrical energy source is below the over-use threshold, control the converter for the electrical load to be supplied with only the principal electrical power; and
when the measured electrical frequency reaches the frequency threshold or when the level of use of the principal electrical energy source reaches the over-use threshold, control the converter for the electrical load to be supplied with both the principal electrical power and the additional electrical power and for an electrical frequency of the additional electrical power to be slaved by a phase-locked loop to the frequency of the measured electrical voltage.