SOLENOID VALVE CONTROL METHOD AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2022 - IPC H01F7/18 H01H47/00 F16K31/00 G05B19/19 

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering and can be used to control electromagnetic valves (EMV). To control the EMV, a half-bridge control scheme is used, the features of which affect the properties of the proposed method. The moment of the end of the movement of the armature of the electromagnet in the process of operation is determined when the local minimum of the current in the winding of the valve electromagnet is reached upon operation, after which its winding is disconnected from the positive output of the power source, opening the upper switch. And when the current reaches the lower threshold value, if by this moment there is no signal to turn off the valve, the upper switch is closed, connecting the electromagnet winding to the positive output of the power source, providing an increase in current in the winding. When the current in the winding reaches the upper threshold value, the upper switch is opened again. Wherein the closing of the upper switch upon reaching the lower threshold value of the current and opening it upon reaching its upper threshold value is carried out until a signal is received to turn off the valve. And when a signal is received to turn off the valve, the upper key is opened, if it was closed at the moment the signal was received to turn off the valve, and then the lower key is opened with some delay, ensuring that the actuation time and the valve release time are equal. To implement the proposed method, a functional diagram of the device is proposed, the construction feature of which is that its main part, which provides the processing of current measurement signals in the valve solenoid winding and the formation of control signals, is made using the resources of the microcontroller and its internal peripheral modules.

EFFECT: expanding the range and increasing the accuracy of regulating the time of the on state of the EMV.

8 cl, 7 dwg