Rectifier leakage compensated alternator phase detection system

Details Rectifier leakage compensated alternator phase detection system Rectifier leakage compensated alternator phase detection system

1994-06-13

1995-09-12

Stephan, Steven L.

Electricity: single generator systems

Automatic control of generator or driving means

Voltage of generator or circuit supplied

322 29, H02P 900

Patent

active

054499992

ABSTRACT:
An alternator phase detection system for an alternator has a stator winding (115) that provides a stator winding signal bounded within a range. The stator winding signal has a leakage magnitude when the alternator is stationary and a charging magnitude when the alternator is rotating. A leakage compensation circuit (245, 247) biases the stator winding (115) of the alternator by providing a leakage compensation current to the stator winding if the leakage magnitude of the stator winding signal is positioned apart from a boundary of the range, thereby changing the magnitude of the stator winding signal which negates the erroneous effect of rectifier leakage on measurement of alternator motion. A comparator circuit (101) provides an alternator startup state of a status signal (137) if the magnitude of the stator winding signal does noir exceed a predetermined threshold.

REFERENCES:
patent: 4486702 (1984-12-01), Edwards
patent: 4584515 (1986-04-01), Edwards
patent: 5214371 (1993-05-01), Naidu
patent: 5225764 (1993-07-01), Falater
patent: 5254935 (1993-10-01), Vercesi et al.
patent: 5376876 (1994-12-01), Bauser et al.

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