System and method for controlling an alternating current (AC) si

Details System and method for controlling an alternating current (AC) si System and method for controlling an alternating current (AC) si

1996-12-05

1998-12-22

Wong, Peter S.

Electricity: power supply or regulation systems

Output level responsive

Phase controlled switching using electronic tube or a three...

323241, 323322, 323324, G05F 110, G05B 2402

Patent

active

058523570

ABSTRACT:
A system for controlling an Alternating Current (AC) signal to an AC powered device. The system uses a microcontroller to monitor the cycles of the AC signal supplied to the AC powered device. By utilizing cycle counting, the microcontroller can supply various numbers of waveforms to the AC powered device in order to adjust the speed and/or energy supply level to the AC powered device. At full power, all the cycles of the AC signal are provided to the AC powered device. If the speed and/or energy supply level of the AC powered device needs to be reduced by half, the microcontroller supplies every other cycle of the AC signal to the AC powered device.

REFERENCES:
patent: Re33184 (1990-03-01), Westfall et al.
patent: 4331914 (1982-05-01), Huber
patent: 4358729 (1982-11-01), Hart
patent: 4453123 (1984-06-01), Erkman
patent: 4687985 (1987-08-01), Pitel
patent: 4928055 (1990-05-01), Kaieda et al.
patent: 5627742 (1997-05-01), Nakata et al.

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