Control the Axial Displacement of the Rotor Position with Load and No Load Condition in an Active Magnetic Bearing System

The dynamic effects of load fluctuation and the non-orthogonal behaviour of an axial active magnetic bearing (AMB) is enhanced from the dynamic model. The main purpose of the manuscript is to maintain the stability at the time of axial displacement of the rotor at both load and no load condition.

Two loop controllers are used to maintain the stability of the proposed active magnetic bearing system. Inner loop is used to control the current and outer loop control the position. Proportional integral controller is used to control the current of the proposed system. Lead controller is used as a position controller to control the rotor position.

The axial model of an active magnetic bearing is simulated in simulation software, and the results are presented. These results show that overshoot is less in the fuzzy logic controller, but it is lagging in the other controller. Lead controller overshoot is less and better output is obtained compared to others. The hardware output of the AMB system is the same as the outcome of the simulation. The overshoot in the hardware output is comparable to the simulation result.

In this manuscript, PI and LEAD controller based two loops active magnetic bearing system has been designed to control the axial displacement in both load and no load condition. A hardware setup is designed according to the simulation data and the system is successfully tested, and stable rotor levitation is achieved at the required gap between the actuator and rotor.