Electricity: measuring and testing – Electrical speed measuring – Including motor current or voltage sensor
Patent
1993-12-30
1995-06-06
O'Shea, Sandra L.
Electricity: measuring and testing
Electrical speed measuring
Including motor current or voltage sensor
388800, 388806, 318254, 318439, G01P 346, H02P 506, H02P 706, H02P 500
Patent
active
054225701
ABSTRACT:
A method and system for sensing the rotor speed of a brushless permanent magnet motor wherein a signal containing isolated third harmonic components of the flux density is acquired, and the absolute values of the maximas of the signal are measured, the last measured absolute maxima representing the current rotor speed of the motor.
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Julio C. Moreira, et al., "Simple Efficency Maximizer for an Adjustable Frequency Induction Motor Drive," IEEE Transactions on Industry Applications, vol. 27, No. 5, Sep./Oct., 1991.
O'Shea Sandra L.
Phillips Roger
Whirlpool Corporation
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