Field weakening motor control system and method

Details Field weakening motor control system and method Field weakening motor control system and method

2006-04-04

2006-04-04

Martin, David (Department: 2837)

Electricity: motive power systems

Induction motor systems

Braking

C318S700000, C318S701000, C318S721000, C318S722000, C318S810000

Reexamination Certificate

active

07023168

ABSTRACT:
A control system for an electric machine includes a flux weakening module, which includes a voltage magnitude calculator that receives d-axis and q-axis command voltages and that generates a voltage magnitude. An error circuit compares the voltage magnitude to a reference voltage and generates an error signal. A controller receives the error signal and generates a feedback flux correction signal. A limiter limits the feedback flux correction signal to a predetermined flux value and generates a limited feedback flux correction signal. A feedforward stator flux generating circuit generates a feedforward stator flux signal. A summing circuit sums the feedforward stator flux signal and the limited feedback flux correction signal to generate a final stator flux command.

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