Control circuit for two speed motors
AssigneeTherm-O-Disc, Incorporated
InventorsRobert R. Bogwicz, John E. Durkee, Jason S. Anderson
Life of this patent
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Abstract
A control circuit for a two speed electric motor includes high and low speed electronic switches. The high speed electronic switch is biased off when the low speed electronic switch is biased on. The low speed run winding of the motor is activatable only through the low speed electronic switch. The high speed run winding of the motor is activatable either directly through a high speed setting of a speed selector switch or through the high speed electronic switch in a low speed setting of the speed selector switch. Upon activation of the motor start winding, the low speed electronic switch is off and the high speed electronic switch is on.
Claims10
In a control circuit for a two speed electric motor having a start winding, a low speed run winding and a high speed run winding, a speed selector switch having high and low speed positions, a low speed electronic switch in series with said low speed run winding, a high speed electronic switch in series with said high speed run winding, and said high speed electronic switch being biased off when said low speed electronic switch is biased on.
A control circuit for an electric motor having high and low speed run windings, a low speed electronic switch in series with said low speed run winding, a high speed electronic switch in series with said high speed run winding, and a connection between said high and low speed electronic switches to bias said high speed electronic switch off through said low speed electronic switch when said low speed electronic switch is on.
Dependencies are inferred from the claim text.