AC power control apparatus
First Claim
1. An AC power control apparatus comprising:
- a plurality of power supply means for generating powers having different maximum values;
switching means for;
after an AC current is continuously set in a desired turn on control state, alternately selecting first power supply means and second power supply means for supplying a power approximating a substantially uniform power supplied to a load from said plurlaity of power supply means;
turn on tme control means for gradually shortening a turn on time of said first power supply means while gradually prolonging a turn on time of said second power supply means until the turn on time of said second power supply means corresponds to the entire period; and
means for changing the turn on time of said power supply means in units of periods of the AC current.
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Accused Products
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.
11 Citations
4 Claims
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1. An AC power control apparatus comprising:
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a plurality of power supply means for generating powers having different maximum values; switching means for;
after an AC current is continuously set in a desired turn on control state, alternately selecting first power supply means and second power supply means for supplying a power approximating a substantially uniform power supplied to a load from said plurlaity of power supply means;turn on tme control means for gradually shortening a turn on time of said first power supply means while gradually prolonging a turn on time of said second power supply means until the turn on time of said second power supply means corresponds to the entire period; and means for changing the turn on time of said power supply means in units of periods of the AC current. - View Dependent Claims (2, 3, 4)
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Specification