Low cost, variable speed, constant torque induction motor drive
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 31, 1981
Grant Date -
N/A
app pub date -
Oct 18, 1978
filing date -
Oct 18, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A low cost, small rating AC motor drive includes an inverter in which static controlled switches are in two sets associated with opposite poles and controlled in such a way that current continuously fed is sensed relative to one set for feedback current sensing and that the switch current is modulated in the other set in order to regulate the motor current. When starting, or overloaded, the motor drive speed is automatically reduced under air gap motor sensing.
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