How do you drive a latching solenoid?

How do you drive a latching solenoid?

A latching solenoid works this way : You send a short pulse of power to energize the coil of the solenoid. It pulls in and then power is removed. A permanent magnet then holds the solenoid plunger in for an indefinite amount of time without any power applied.

How does a 24v solenoid valve work?

Solenoid valves are control units which, when electrically energized or de-energized, either shut off or allow fluid flow. The actuator takes the form of an electromagnet. When energized, a magnetic field builds up which pulls a plunger or pivoted armature against the action of a spring.

How does a latching relay work?

A latching relay is a two-position electrically-actuated switch. It is controlled by two momentary-acting switches or sensors, one that ‘sets’ the relay, and the other ‘resets’ the relay. The latching relay maintains its position after the actuating switch has been released, so it performs a basic memory function.

How does a DC latching solenoid work?

Latching Solenoids utilize the electrical current pulse or internal permanent magnet material to maintain a set position without the constant application of an electrical current. As the current flows in one direction energizing the coil field in the solenoid, it adds to the pull of the permanent magnet.

Do I need an H bridge to drive a solenoid?

I can see no reason why you need an H bridge to drive a solenoid. An H bridge is usually used to drive a motor with the feature of reversing the motor direction. I think you can get by with a single transistor to drive your coil. I find that I am probably feeling bored if I am not feeling stupid.

What is an H-bridge and how do I use it?

H-bridges are commonly used to drive DC motors in either direction by reversing the polarity of voltage being sent to the motor, and are commonly controlled by microcontroller pins. In this case we won’t be driving a motor, but instead using the H-bridge to reverse the polarity of the voltage being sent to the DC latching solenoid.

What are the common problems with DC latching solenoids?

Another problem is that the DC latching solenoids require their supply polarity to be reversed to turn the valve off. The solution to both of these problems is an H-bridge circuit.

How do you latch the solenoid?

Just treat the relay coil being the coil of the valve. To have the solenoid latch logic input A should be positive (for at least 10ms) while logic input B stays low. Output A will then have VCC-level and Output B will have ground level – latching the solenoid.