Research on current controller of Magnetorhelogical damper system

A method of designing a linear current controller based on an H-type bridge chopper is presented with consideration of the impedance behavior and magnetic excitation requirements of the MR (Magnetorhelogical) damper system. Furthermore, parameters of the current controller affecting the performance of MR damper system are investigated. Then a dynamic model of current controller is established, and the characteristic of the model is analyzed. The results of the simulation and experiments indicate that this current controller has not only a short response time of the current, but also a good linearity between control voltage and output current. And the current supplied by the current controller has a large adjustable range.