Development of a Magnetorheological Damper with an in Two Ways Adjustable Magnetic Field for an Electrically Powered Car with Wheel Hub Motors

摘要

With the integration of wheel hub motors in electrically powered cars the unsprung masses are increasing. This leads to new demands for the chassis design. A recent Fraunhofer LBF approach is an adaptive magnetorheological damper with a two way adjustable magnetic field. An adjustable field generated by a physically moveable permanent magnet is superposed by a second field generated by a solenoid coil. As a result it is possible to design a very energy efficient magnetorheological damper.