Study on a Magnetic Actuation Mechanism and Its Performance Simulations

A revolving electromagnetic mechanism composed of a stator and rotor has been designed to supply contactless actuation force to boring bar for boring of non-circular hole. While the currents in the pole-pairs coils on the stator change, the actuation force would change correspondingly and drive the rotor to take a wanted micro displacement radially. With the linearization of the actuation force near static action point, linear relationship between the control current and the actuation force has been constructed, and the synchronizing control method of the electromagnetic actuator has been presented. With the simulations of the electromagnetic field parameters, the relationship between the control current and the electromagnetic force has been ascertained. The simulations indicate that a synchronized actuation force between the rotor and stator can be produced with the mechanism. Finally the simulating tests have been carried out, and the feasibility of the magnetic actuation mechanism has been confirmed