Electricity: motive power systems – Synchronous motor systems – Armature winding circuits
Reexamination Certificate
2005-09-06
2005-09-06
Duda, Rina (Department: 2837)
Electricity: motive power systems
Synchronous motor systems
Armature winding circuits
C318S700000, C318S254100, C318S609000, C318S610000
Reexamination Certificate
active
06940251
ABSTRACT:
A synchronous motor controller and method of controlling a synchronous motor without using rotor position sensors are provided. In a floating synchronous reference frame controller, phase currents are measured and a current Park vector is determined. The error between an initially arbitrary floating reference frame is reduced with a control loop. Decoupling terms based on the estimated speed of the rotor and the stator winding inductance are used to generate decoupled voltage terms in the v- and u-axis of the floating synchronous reference frame. The decoupled voltage command is converted back to a stator reference frame and applied to the synchronous motor via a power electronic converter. As a result u-axis current is minimized during transients, and a robust and accurate estimation of the current vector to be used in coordinate transformation for controlling the machine are achieved and the need for overrating of motor and inverter components is avoided.
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Huggett Colin E.
Sarlioglu Bulent
Duda Rina
Honeywell International , Inc.
Oral Caglar Esq.
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