Data processing: measuring – calibrating – or testing – Measurement system – Orientation or position
Reexamination Certificate
2007-02-27
2007-02-27
Barlow, John (Department: 2863)
Data processing: measuring, calibrating, or testing
Measurement system
Orientation or position
C318S434000
Reexamination Certificate
active
10809402
ABSTRACT:
An adaptive, sensorless position sensing apparatus (250) derives rotor position of a synchronous machine (200). The apparatus (250) comprises a first rotor position deriving unit (300) for generating first rotor position values by applying a first sensorless rotor position calculation technique, which emulates a resolver; a second rotor position deriving unit (400) for generating second rotor position values by applying a second sensorless rotor position calculation technique; and a rotor position result output unit (450) for outputting rotor position results over a range of rotor speeds as a function of the first rotor position values, the second rotor position values, and rotor speed.
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Takashi Aihara et al., “Sensorless Torque Control of Salient-Pole Synchronous Motor at Zero-Speed Operation,” IEEE Transactions on Power Electronics, vol. 14, No. 1, Jan. 1999, pp. 202-208.
Anghel Cristian E.
DiVito Rocco
Morcov Nicolae
Barlow John
Birch & Stewart Kolasch & Birch, LLP
Honeywell International , Inc.
Moffat Jonathan
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