AC power control apparatus

Details AC power control apparatus AC power control apparatus

1987-06-05

1988-10-18

Salce, Patrick R.

Electricity: power supply or regulation systems

Output level responsive

Zero switching

323268, 307 81, G05F 140

Patent

active

047790369

ABSTRACT:
An AC power control apparatus includes a plurality of power supply circuits for generating powers having different maximum values, a switching circuit for, after an AC current is continuously set in a desired turn on control state, alternately selecting a first power supply circuit used until that time and a second power supply circuit for supplying a power approximating a power supplied to a load at that time from the plurality of power supply circuits, a turn on time control circuit for gradually shortening a turn on time of the first power supply circuit while gradually prolonging a turn on time of the second power supply circuit until the turn on time of the second power supply circuit corresponds to the entire period, and a circuit for changing the turn on time of the power supply circuit in units of periods of the AC current.

REFERENCES:
patent: 3959714 (1976-05-01), Minelich
patent: 4384213 (1983-05-01), Bogel
patent: 4434358 (1984-02-01), Apfelbeck et al.
patent: 4493984 (1985-01-01), Yamauchi
patent: 4589059 (1986-05-01), Tanino

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