Variable frequency drive circuit
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United States of America Patent
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-
May 10, 1988
Grant Date -
N/A
app pub date -
Jan 12, 1987
filing date -
Jan 12, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An AC power system for a resonant load. A pair of switching networks and blocking networks are provided to drive the load for half a cycle in a resonant manner to a high energy state, and then maintained in that high energy state for a predetermined period. Then the load is driven for half a cycle in a resonant manner to the opposite polarity high energy state, and maintained in that high energy state for the predetermined period. A controller adjustably controls the frequency of switching between the two high energy states and the length of the predetermined period, so that a desired frequency is obtained.
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