Self-excitation for an alternator of the low-carbon steel rotor

Details Self-excitation for an alternator of the low-carbon steel rotor Self-excitation for an alternator of the low-carbon steel rotor

1981-03-12

1983-10-11

Hickey, R. J.

Electricity: single generator systems

Automatic control of generator or driving means

Voltage of generator or circuit supplied

322 60, 322 73, H02P 908

Patent

active

044095392

ABSTRACT:
A charging system for amplifying AC output voltages induced in at least one stator winding of an alternator by residual magnetism from a low carbon steel rotor to self-excite the charging system by means of the residual magnetism at low engine RPM. An electronic voltage regulator is responsive to small AC output voltages from the stator winding, even below voltage levels required to forward bias a silicon semiconductor junction, to fully energize the field winding of the alternator. Since the voltage regulator is responsive to alternator signal developed at low engine RPM, the regulator can also be used as a sensor to indicate an operative engine condition, such as start up.

REFERENCES:
patent: 3378753 (1968-04-01), Poppinger et al.
patent: 3548288 (1970-12-01), Wyles
patent: 3585490 (1971-06-01), Zelina
patent: 3611112 (1971-10-01), Lehinhoff
patent: 3619761 (1971-11-01), Nagae
patent: 3982169 (1976-09-01), Cummins
patent: 4087736 (1978-05-01), Mori et al.
patent: 4222001 (1980-09-01), Kofink
patent: 4223368 (1980-09-01), Santis et al.
patent: 4297631 (1981-10-01), Nicol et al.

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