Understanding the Power Behind Magnetic Movement----Push and Pull solenoid relationship between The Stroke and Force

Understanding the Power Behind Magnetic Movement----Push and Pull solenoid relationship between The Stroke and Force  

Generally speaking, the Dc push and pull solenoid can output more  force when the stroke is short.  When the moving iron core moves a short distance, the utilization rate of the magnetic field is relatively high, and the magnetic lines of force are concentrated in a shorter distance to act on the moving iron core, enabling it to generate a larger push and pull force.

When the length of stroke increases, the force of the electromagnet will gradually weaken. It is due to the farther the moving iron core is from the initial position, the magnetic field strength will gradually decrease, the distribution of magnetic lines of force will become sparse, and the effective magnetic force acting on the moving iron core will also become smaller. Moreover, during the long stroke, it will be affected by more resistance factors, such as air resistance, friction, etc., which will lead to power loss.

In practical applications, it is necessary to balance the stroke and force according to specific requirements. If a larger force and a shorter stroke are required, an electromagnet with a smaller size and a higher magnetic field strength can be selected; if a longer stroke is required, it may be necessary to sacrifice a certain amount of force, or select a larger and more complex electromagnet structure to meet the needs.