Control circuits for supplying current to actuate solenoids
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United States of America
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Dec 24, 2024
Grant Date -
Mar 28, 2024
app pub date -
Sep 28, 2022
filing date -
Sep 28, 2022
priority date (Note) -
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Abstract
Disclosed are exemplary embodiments of control circuits for supplying current to actuate solenoids, such as refrigerant valves in HVAC systems, other valves, “solenoid” style contactors, other coil driven actuators, etc. In exemplary embodiments, a control circuit for supplying current to actuate a solenoid comprises a solenoid coil and a switch coupled with the solenoid coil. The control circuit may be configured such that the solenoid coil is operable as a load coil and a switch mode supply coil and such that the switch is configured to operate a load and power supply of the control circuit. Additionally, or alternatively, the control circuit may include a current monitoring shunt and a flyback diode that are located in a circulating current loop defined by and/or including the solenoid coil, the current monitoring shunt, and the flyback diode.
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