Fraunhofer Institute for Integrated Circuits IIS
When magnets are mass produced, deviations and errors may occur with respect to your technical specification. In the case of sensors that work based on magnetic fields, faulty magnets may lead to measurement errors or reduced performance in permanently excited electric drives. In magnetic position sensors, the magnet’s position is determined using a precisely defined field curve. This means that any magnetization errors arising from the magnet’s production process can affect how accurately its position can be determined. When it comes to highly efficient electric drives, even small deviations from the parameters in individual magnets lead to fluctuations in torque, thus to unsteady operating behavior and ultimately to reduced service life. These modern use cases show how important it is to know the properties of the magnets used.