Dual pinion drive system

摘要

A control system for controlling an electrical machine comprises a controller component which receives a first signal providing a measured parameter of the electrical machine and a second signal providing a first reference parameter of the electrical machine and using the first signal and second signal produces a first control signal, a first filter component which receives the first signal from the electrical machine and uses the first signal to produce a second control signal, and a second filter component operable to receive a third signal which relates to a reference parameter of a second electrical machine from that second electrical machine and to use the third signal to produce a third control signal. The system also includes a first output component which is operable to receive such a first control signal and such a second control signal and to combine said first and second control signals to produce a first output control signal for provision to said first electrical machine, and a second output component operable to receive such a first control signal and such a third control signal and to combine such first and third control signals to produce a second output control signal for provision to a second electrical machine.