Device for driving a fuel pump for a turbomachine

A transmission device for driving a fuel pump for a turbomachine from a drive shaft of said turbomachine, the device comprising an epicyclic gear reducer comprising the following three elements:

• a central sun gear;
• an outer ring gear;
• and
• a planet carrier, the planets of which engage with the sun gear and the ring gear,
• a first of the three elements being configured to be connected to the drive shaft and a second of the three elements being configured to be coupled to a shaft of the pump, wherein said three elements are configured to be rotated about a shaft of the reducer, the device further comprising first electrical means arranged to rotatably drive the third of said elements of the reducer to modify a rotational speed ratio between the first and the second of said elements, and second electrical means coupled to one of the first and the second of said elements of the reducer, the first and second electrical means being arranged to transfer electrical power reversibly from one to the other.