Electricity: motive power systems – Synchronous motor systems – Synchronization systems
Reexamination Certificate
2006-05-16
2006-05-16
Leykin, Rita (Department: 2837)
Electricity: motive power systems
Synchronous motor systems
Synchronization systems
C318S715000, C318S716000, C318S807000
Reexamination Certificate
active
07045986
ABSTRACT:
A position sensing apparatus (300) derives rotor position of a synchronous machine (200) from signals output from the machine (200). In one embodiment, the position sensing apparatus (300) comprises: a bandpass filter (322) that filters phase voltage signals output from main stator windings (216) of the synchronous machine (200) during AC excitation, thereby extracting a rotor position-indicating component from the phase voltage signals; a converter (324) that converts the filtered phase voltages into balanced two-phase quadrature signals, the balanced two-phase quadrature signals indicating positioning of the rotor (212); and an excitation controller (204) for controlling AC excitation frequency as a function of rotor speed.
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Anghel Cristian E.
DiVito Rocco
Morcov Nicolae A.
Birch & Stewart Kolasch & Birch, LLP
Honeywell International , Inc.
Leykin Rita
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