Apparatus and method to control torque and voltage of an AC...

Details Apparatus and method to control torque and voltage of an AC... Apparatus and method to control torque and voltage of an AC...

2007-04-24

2007-04-24

Donovan, Lincoln (Department: 2837)

Electricity: motive power systems

Synchronous motor systems

Synchronization systems

C318S434000, C318S254100, C318S700000, C318S722000

Reexamination Certificate

active

10889712

ABSTRACT:
A method of controlling a power converter (258) of a synchronous machine drive system (100) determines position and speed of a rotor (350) of the synchronous machine (300); regulates a current vector relative to a reference frame, having a direct-axis component and a quadrature-axis component, the regulating step selectively causing the current vector to lag a quadrature axis of the machine (300); and outputs a command signal to the power converter (258) as a function of the regulating step. According to one implementation, this process creates higher total torque and maintains supply voltage within a maximum level during a high speed range of the machine.

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