The force-stroke characteristic curve is checked when using proportional or switching magnets. The curve represents a function test on electromagnetic actuators and is usually the final test. The basic function properties of the actuators can be ascertained from the characteristic curve. The force-stroke characteristic and provides information as to whether the actuator is applying the required force inside its operating range at a fixed current level. The hysteresis provides information about friction resulting from the quality of the mechanical parts.
The force-current characteristic curve is predominantly tested for proportional magnets and provides information as to whether the actuator is applying the required force inside a current range at a defined armature position. The ideal characteristic curve has a linear relationship between force and current around the operating point.
