Patent ID: 11873907
Assignee: CAPSTAN AG SYSTEMS, INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC F  B  H | IPC B  F  H

Claim 0:
1. A method of controlling a solenoid valve having a solenoid coil and a poppet configured to translate therein, said method comprising:
energizing a first node to a first voltage using a power source;
coupling, by a control circuit coupled to the first node, the first node to the solenoid coil and energizing the solenoid coil using a pulse-width-modulated (PWM) signal having a first frequency and duty cycle configured to regulate a current conducted through the solenoid coil to below an opening threshold to maintain the poppet in a closed position;
energizing a second node to a second voltage with energy stored in the solenoid coil using a flyback circuit coupled to the solenoid coil;
coupling, by the control circuit further coupled to the second node, the second node to the solenoid coil and energizing the solenoid coil using a DC signal configured to increase the current to above the opening threshold to translate the poppet toward an opened position; and
coupling the first node to the solenoid coil and energizing the solenoid coil using the PWM signal having a second frequency and duty cycle configured to regulate the current to above a closing threshold to maintain the poppet in the opened position.