Method and apparatus for filtering alternator ripple using synch

Details Method and apparatus for filtering alternator ripple using synch Method and apparatus for filtering alternator ripple using synch

1993-05-06

1995-02-14

Peckman, Kristine L.

Electricity: single generator systems

Automatic control of generator or driving means

Voltage of generator or circuit supplied

322 58, H02J 714

Patent

active

053898702

ABSTRACT:
A circuit and a method for filtering the ripple in an output of a multi-phase alternator in a vehicle system having a regulating circuit that regulates the output of the alternator includes a switch connected in series between a system voltage and the input of the regulating circuit, and circuitry for closing the switch at a predetermined phase of the voltage of at least one of the stator windings of the alternator. The circuitry for closing the switch operates to close the switch at a conduction switchover point among the stator windings in synchronism with a voltage waveform of the at least one of the stator windings, and is timed to produce an aliased waveform for application to the regulator. The output of the switch is applied to an integrator for integrating the output voltage from the alternator during an entire time cycle period of one of the windings of the stator coils for application to the regulator.

REFERENCES:
patent: 4128799 (1978-12-01), Morishima
patent: 4223363 (1980-09-01), Santis et al.
patent: 4315204 (1982-02-01), Sievers et al.
patent: 4340849 (1982-07-01), Kunn
patent: 4872127 (1989-10-01), Nolan
patent: 4920308 (1990-04-01), Edwards et al.
patent: 4962348 (1990-10-01), Edwards
patent: 5599552 (1986-07-01), Phillips et al.

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