Patent ID: 11873112
Assignee: SAFRAN
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC B  H | IPC B  H

Claim 0:
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.