In this context, the word "force" is used in a general sense of "that which has a physical effect", and is not the same as mechanical force measured in newtons.
Magnetomotiveforce is expressed by the value U (=NI) obtained by multiplying the number of coil turns N (T) by the current I (A) flowing in a coil, and it can be used to evaluate the electromagnetic attraction force which can be attained for the short time At.
Further, during valve closing operations, the magnetomotiveforce generated during the valve open hold period decays in response to interruption of the voltage to the hold coil 12, that is, the electromagnetic force decays.
A magnetic attraction force attracting the plunger 15 is generated by the magnetic flux passing through a magnetic path in a magnetic circuit composed of the core 23, the yoke 24, and the plunger 15.
The symbol for magnetomotiveforce is "F" and it is measured in Gilberts.
The magnitude of the force depends on the speed of the electron, the flux density, and the angle of motion relative to the orientation of the field.
The magnitude of the force is greatest when the vectors are at ninety degrees to one another and diminishes as the angle between the two vectors closes.
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