Induction motors including speed sensing circuits for motor control
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United States of America
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Mar 4, 2025
Grant Date -
Oct 27, 2022
app pub date -
Jan 4, 2022
filing date -
Jan 4, 2022
priority date (Note) -
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Abstract
An induction motor assembly includes an induction motor, and one or more switches coupled to selectively inhibit the supply of power from a power source to at least one of a main winding and an auxiliary winding of the motor. A control circuit is configured to obtain a main winding voltage value representative of a voltage across the main winding, receive an auxiliary winding voltage value according to a sensed voltage across the auxiliary winding, and determine at least one of a rotational speed of the induction motor and a load of the induction motor, according to the main winding voltage value and the auxiliary winding voltage value. The control circuit is configured to control switching operation of the one or more switches according to the determined rotational speed or the determined load, or generate a log of the determined rotational speed or the determined load in memory for monitoring.
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