Method for determining the coercive field strength of soft-magnetic components

摘要

The invention relates to a method for determining the coercive field strength of soft-magnetic components which is used for testing soft-iron components for maintaining prescribed maximum values for the coercive field strength. It is the object of the invention to create a method which can be used directly in the industrial production process and in which the component sections to be tested are measured directly. According to the invention, a test probe with an elastically suspended magnetic body which is provided with windings is arranged opposite to the component section to be tested. The component section located opposite to the test probe is magnetised by means of which the magnetic body in the test probe is attracted to the component and adheres to it. After that, the windings of the magnetic body are excited by a preferably ramp-shaped slowly rising current which is directed in opposition to the direction of the current which flowed before. The current value at which the magnetic body is pulled away from the component by the known external force is stored. These steps are then repeated for another external force.