what is different bewteen single latching solenoid and double latching solenoid
At Dr Solenoid, there are two kinds of latching solenoids ( it also names holding electromagnet/ permanent solenoid ), one is single latching solenoid and the other is double latching solenoid. both type of latching solenoids can be selected for different purposes. As a professional solenoid manufacturers, we would like to show you the different between the two kinds of the latching solenoids.
Single Latching Solenoid: the unit will push the object to move in one direction after the DC power is on, it will keep the stroke and force in the push-out state after the power is off, and return to the original position after reverse power is on (one-way holding has force for push-out direction movement and no force for the pull-back direction )
Double Latching Solenoid: the unit will push the object to move in one direction after power is on, keep the stroke and force in the push-out state after power is off, and return to the original position after reverse power is turned on ( there are the same holding fore for the push-out and pull-back directional )
The working principle of comment push-pull solenoid is to push (or pull back) when power is on, and reset when power off. If it is necessary to keep the push-out state (or pull-in state) for a long time, it needs to be powered on for a long time without power off. At this time, there are certain hard factors that affect its life. The advantage of ordinary push-pull electromagnets is that they can quickly realize push-pull actions ( the fastest can achieve three round trips per second), and are often used in some mechanical structure equipment that needs to realize push-pull actions quickly.
The principle of single solenoid is to add a permanent magnet block fixed on the ordinary push-pull solenoid housing. The working principle is that it can be powered off immediately after being powered on to push (or pull), and it will still be kept at the terminal (just like the ordinary push-pull electromagnet is powered on for a long time, and the power is kept on to achieve the push-hold state). However, the single latching solenoid can be powered off immediately after being powered on, and it is mainly maintained at the terminal by the holding force generated by the internal permanent magnet block. At this time, the stroke and force can be maintained. Reset requires reverse power supply, and is mainly used in some mechanical structures that need to maintain the push state for a long time.
The double latching solenoid has the same working principle as the single latching solenoid, but it is designed with double coils inside, so that it can generate holding force at both ends, and the stroke and holding force are the same.
The difference between the latching solenoid and the ordinary solenoid is that the ordinary solenoid can maintain the push stroke and force for a long time based on the time of power on, but the latching solenoid can be powered off immediately after being powered on, and the internal permanent magnet block will maintains the push stroke and force for a long time without power on.
The difference between a double latching solenoid and a single solenoid is that a single latching solenoid can hold the force on only one end, and it needs to be reset by reverse power and spring. A double latching solenoid can hold the force at both ends when the power is off.