| 摘要 |
The present application discloses a fuel system for a gas turbine engine (10). The engine (10) comprises a main alternating current electrical generator (118) driven by an engine shaft (26, 28, 30) such that the electrical output frequency of the electrical generator (118) varies in dependence on shaft (26, 28, 30) rotational speed. The fuel system comprises a variable flow fuel pump (110) for providing a fuel flow to the engine, a frequency and / or voltage controller (114) configured to provide electrical power having at least one of a predetermined output frequency and a predetermined voltage, and a variable speed electric motor (112) configured to drive the fuel pump (110). The electric motor (112) comprises an induction motor having a stator (152) and at least a first rotor (150), the stator (152) having first and second sets (156, 158) of stator windings. Each set of stator windings (156, 158) is configured to impart a torque on the rotor (150) in use. The first set of stator windings (156) is supplied with electrical power having the output frequency of and voltage supplied by the main generator (118) and the second set of stator windings (158) is supplied with electrical power from the frequency and / or voltage controller (114). |
