Method and apparatus to control input to AC induction motors
First Claim
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1. A method to control input to an alternating current (AC) induction motor from a power supply that comprises steps of:
- determining a measure of reactive power (VAR) in two input lines to the motor during a time period; and
maintaining an SSR (solid state relay) connected in series between the power supply and the motor in a non-conducting state for a subsequent time period, the length of which subsequent time period is determined by analyzing the measure of VAR.
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Abstract
One embodiment of the present invention is a method to control input to an alternating current (AC) induction motor from a power supply that includes steps of: (a) determining a measure of reactive power (VAR) in two input lines to the motor during a time period; and (b) maintaining an SSR (solid state relay) connected in series between the power supply and the motor in a non-conducting state for a subsequent time period, the length of which subsequent time period is determined by analyzing the measure of VAR.
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Citations
3 Claims
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1. A method to control input to an alternating current (AC) induction motor from a power supply that comprises steps of:
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determining a measure of reactive power (VAR) in two input lines to the motor during a time period; and
maintaining an SSR (solid state relay) connected in series between the power supply and the motor in a non-conducting state for a subsequent time period, the length of which subsequent time period is determined by analyzing the measure of VAR. - View Dependent Claims (2)
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3. A method to control input to an alternating current (AC) induction motor from a power supply that comprises the steps of:
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determining a measure of reactive power (VAR) in at least one input line to the motor during a time period; and
maintaining an SSR (solid state relay) connected in series in said input line between the power supply and the induction motor in a non-conducting state for a subsequent time period, the length of which subsequent time period is determined by analyzing the measure of VAR.
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Specification