Method and apparatus for controlling an engine start system

Details Method and apparatus for controlling an engine start system Method and apparatus for controlling an engine start system

2007-06-05

2007-06-05

Ponomarenko, Nicholas (Department: 2834)

Prime-mover dynamo plants

Electric control

Starting and generating dynamo

C290S03600R, C322S010000

Reexamination Certificate

active

11217357

ABSTRACT:
An apparatus (80) controls a synchronous machine (20) used to start an engine (300) during an engine start operation. The apparatus comprises: an exciter current control unit (84) for controlling exciter current output to the synchronous machine (20) during the engine start operation; and a main current control unit (82) for controlling main current output to the synchronous machine (20) during the engine start operation as a function of machine speed. In one implementation, the main current control unit (82) controls main current output to the synchronous machine (20) so that the synchronous machine (20) exhibits a reduced output torque during an initial torque application stage. The reduced viscous drag effects and reduced impact torque are beneficial to the engine system (100).

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